TLC5941RHBTG4
更新时间：2025-05-03 05:34:50
品牌：TI
描述：具有点校正与灰度 PWM 控制的 16 通道 LED 驱动器 | RHB | 32 | -40 to 85
概述
规格参数
数据手册
替代型号TLC5941RHBTG4 概述
具有点校正与灰度 PWM 控制的 16 通道 LED 驱动器 | RHB | 32 | -40 to 85 LED驱动器 显示驱动器
TLC5941RHBTG4 规格参数
| 是否无铅： | 不含铅 | 是否Rohs认证： | 符合 |
| 生命周期： | Active | 零件包装代码： | QFN |
| 包装说明： | QFN-32 | 针数： | 32 |
| Reach Compliance Code： | compliant | ECCN代码： | EAR99 |
| HTS代码： | 8542.39.00.01 | Factory Lead Time： | 6 weeks |
| 风险等级： | 5.6 | Is Samacsys： | N |
| 数据输入模式： | SERIAL | 输入特性： | STANDARD |
| 接口集成电路类型： | LED DISPLAY DRIVER | JESD-30 代码： | S-PQCC-N32 |
| JESD-609代码： | e4 | 长度： | 5 mm |
| 湿度敏感等级： | 2 | 复用显示功能： | NO |
| 功能数量： | 1 | 区段数： | 16 |
| 端子数量： | 32 | 最高工作温度： | 85 °C |
| 最低工作温度： | -40 °C | 输出特性： | CONSTANT-CURRENT |
| 封装主体材料： | PLASTIC/EPOXY | 封装代码： | HVQCCN |
| 封装等效代码： | LCC32,.2SQ,20 | 封装形状： | SQUARE |
| 封装形式： | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE | 峰值回流温度（摄氏度）： | 260 |
| 电源： | 3.3/5 V | 认证状态： | Not Qualified |
| 座面最大高度： | 1 mm | 子类别： | Display Drivers |
| 最大压摆率： | 60 mA | 最大供电电压： | 5.5 V |
| 最小供电电压： | 3 V | 标称供电电压： | 5 V |
| 表面贴装： | YES | 温度等级： | INDUSTRIAL |
| 端子面层： | Nickel/Palladium/Gold (Ni/Pd/Au) | 端子形式： | NO LEAD |
| 端子节距： | 0.5 mm | 端子位置： | QUAD |
| 处于峰值回流温度下的最长时间： | NOT SPECIFIED | 宽度： | 5 mm |
| 最小 fmax： | 30 MHz | Base Number Matches： | 1 |
TLC5941RHBTG4 数据手册
通过下载TLC5941RHBTG4数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。
PDF下载TLC5941
PWP
RHB
NT
www.ti.com
SLVS589–JULY 2005
16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM
CONTROL
FEATURES
APPLICATIONS
•
Monocolor, Multicolor, Full-Color LED Dis-
plays
•
•
•
16 Channels
12-bit (4096 Steps) Grayscale PWM Control
Dot Correction
•
•
LED Signboards
Display Back-lighting
– 6 bit (64 Steps)
•
Drive Capability (Constant-Current Sink)
– 0 mA to 80 mA
DESCRIPTION
The TLC5941 is a 16-channel, constant-current sink,
LED driver. Each channel has an individually adjust-
able 4096-step grayscale PWM brightness control
and a 64-step constant-current sink (dot correction).
The dot correction adjusts the brightness variations
between LED channels and other LED drivers. Both
grayscale control and dot correction are accessible
via a serial interface. A single external resistor sets
the maximum current value of all 16 channels.
•
•
•
•
•
•
•
LED Power Supply Voltage up to 17 V
VCC = 3.0 V to 5.5 V
Serial Data Interface, SPI Compatible
Controlled In-Rush Current
30-MHz Data Transfer Rate
CMOS Level I/O
Error Information
The TLC5941 features two error information circuits.
The LED open detection (LOD) indicates a broken or
disconnected LED at an output terminal. The thermal
error flag (TEF) indicates an overtemperature con-
dition.
– LOD: LED Open Detection
– TEF: Thermal Error Flag
VCC
GND
SCLK
SIN
XLAT
CNT
MODE
Constant-Current
Driver
1
0
12−Bit Grayscale
PWM Control
GS Register
DC Register
OUT0
V
IREF
REF
=1.24
MODE
Max. OUTn
Current
0
0
11
1
0
Delay
x0
V
0
6−Bit Dot Correction
LED Open Detection
5
GSCLK
BLANK
GS Counter
CNT
Input
Shift
Register
CNT
0
96
Status
Constant-Current
Driver
Information:
12−Bit Grayscale
PWM Control
192
192
GS Register
OUT1
12
6
23
LOD,
TED,
DC DATA
Delay
x1
95
96
96
DC Register
11
6−Bit Dot Correction
LED Open Detection
191
1
0
MODE
96
Temperature
Error Flag
(TEF)
LED Open
Detection
(LOD)
CNT
Input
Shift
Constant-Current
Driver
12−Bit Grayscale
PWM Control
GS Register
191
OUT15
Register
180
90
Delay
x15
XERR
DC Register
95
6−Bit Dot Correction
LED Open Detection
191
SOUT
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated
TLC5941
www.ti.com
SLVS589–JULY 2005
These devices have limited built-in ESD protection. The leads should be shorted together or the device
placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
ORDERING INFORMATION
TA
PACKAGE(1)
28-pin HTSSOP PowerPAD™
32-pin 5 mm x 5 mm QFN
28-pin PDIP
PART NUMBER
TLC5941PWP
TLC5941RHB
TLC5941NT
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
(1) For the most current package and ordering information, see the Package Option Addendum at the end
of this document, or see the TI Web site at www.ti.com.
ABSOLUTE MAXIMUM RATINGS.
over operating free-air temperature range (unless otherwise noted)(1)
UNIT
VI
IO
VI
Input voltage range(2)
Output current (dc)
Input voltage range
VCC
–0.3 V to 6 V
90 mA
V(BLANK), V(SCLK), V(XLAT), V(MODE)
V(SOUT), V(XERR)
–0.3 V to VCC +0.3 V
–0.3 V to VCC +0.3 V
–0.3 V to 18 V
VO
Output voltage range
V(OUT0) to V(OUT15)
HBM (JEDEC JESD22-A114,
Human Body Model)
2 kV
ESD rating
CDM (JEDEC JESD22-C101,
Charged Device Model)
500 V
Tstg
TA
Storage temperature range
–55°C to 150°C
–40°C to 85°C
31.58°C/W
35.9°C/W
Operating ambient temperature range
HTSSOP (PWP)(4)
Package thermal impedance(3) QFN (RHB)(4)
PDIP (NT)
48°C/W
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
(4) With PowerPAD soldered on PCB with 2-oz. trace of copper. See TI application report SLMA002 for further information.
2
TLC5941
www.ti.com
SLVS589–JULY 2005
RECOMMENDED OPERATING CONDITIONS
PARAMETER
DC Characteristics
TEST CONDITIONS
MIN
NOM
MAX
UNIT
VCC
VO
Supply Voltage
3
5.5
17
V
V
Voltage applied to output (OUT0 - OUT15)
High-level input voltage
VIH
VIL
IOH
IOL
0.8 VCC
GND
VCC
0.2 VCC
–1
V
Low-level input voltage
V
High-level output current
Low-level output current
Constant output current
VCC = 5 V at SOUT
mA
mA
mA
°C
VCC = 5 V at SOUT, XERR
OUT0 to OUT15
1
IOLC
TA
80
Operating free-air temperature range
–40
85
AC Characteristics
VCC = 3 V to 5.5 V, TA = –40°C to 85°C (unless otherwise noted)
Data shift clock
frequency
f(SCLK)
SCLK
30
30
MHz
MHz
Grayscale clock
frequency
f(GSCLK)
GSCLK
(1)
twh0/twl0
twh1/twl1
twh2
twh3
tsu0
SCLK pulse duration
GSCLK pulse duration
XLAT pulse duration
BLANK pulse duration
SCLK = H/L
16
16
20
20
10
10
10
10
10
10
10
10
10
10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(2)
GSCLK = H/L
(3)
XLAT = H
(2)
BLANK = H
SIN - SCLK
SCLK - XLAT
(3)
(3)
tsu1
(4)
(4)
tsu2
Setup time
Hold Time
MODE - SCLK
MODE - XLAT
tsu3
(2)
tsu4
BLANK - GSCLK
(3)
th0
SCLK - SIN
(3)
th1
XLAT - SCLK
(4)
th2
SCLK - MODE
XLAT - MODE
(4)
th3
(2)
th4
BLANK - GSCLK
(1) See Figure 8
(2) See Figure 12
(3) See Figure 10
(4) See Figure 6
DISSIPATION RATINGS
POWER RATING
POWER RATING
POWER RATING
PACKAGE
DERATING FACTOR ABOVE TA = 25°C
31.67 mW/°C
TA < 25°C
TA = 70°C
TA = 85°C
28-pin HTSSOP with
PowerPAD™
3958 mW
2533 mW
1296 mW
2058 mW
1053 mW
soldered(1)
28-pin HTSSOP
without PowerPAD™
soldered
2026 mW
16.21 mW/°C
32-pin QFN(1)
3482 mW
2456 mW
27.86 mW/°C
19.65 mW/°C
2228 mW
1572 mW
1811 mW
1277 mW
28-pin PDIP
(1) The PowerPAD is soldered to the PCB with a 2-oz. copper trace. See application report SLMA002 for further information.
3
TLC5941
www.ti.com
SLVS589–JULY 2005
ELECTRICAL CHARACTERISTICS
VCC = 3 V to 5.5 V, TA = -40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
VOL
High-level output voltage
Low-level output voltage
IOH = –1 mA, SOUT
IOL = 1 mA, SOUT
VCC –0.5
V
V
0.5
1
VI = VCC or GND; BLANK, TEST,
GSCLK, SCLK, SIN, XLAT pin
–1
–1
II
Input current
µA
VI = VCC; MODE pin
VI = GND; MODE pin
50
1
No data transfer, all output OFF,
VO = 1 V, R(IREF) = 10 kΩ
0.9
5.2
16
30
61
6
12
25
60
69
No data transfer, all output OFF,
VO = 1 V, R(IREF) = 1.3 kΩ
ICC
Supply current
mA
Data transfer 30 MHz, all output ON,
VO = 1 V, R(IREF) = 1.3 kΩ
Data transfer 30 MHz, all output ON,
VO = 1 V, R(IREF) = 640 Ω
All output ON, VO = 1 V,
R(IREF) = 640 Ω
IO(LC)
Constant output current
Leakage output current
54
mA
All output OFF,
VO = 15 V, R(IREF) = 640 Ω ,
OUT0 to OUT15
Ilkg
0.1
µA
All output ON,
VO = 1 V, R(IREF) = 640 Ω,
OUT0 to OUT15, –20°C to 85°C
±1
±4
%
All output ON,
VO = 1 V, R(IREF) = 480 Ω,
OUT0 to OUT15, –20°C to 85°C
∆IO(LC0)
±1
±1
±6
±8
±4
%
%
%
All output ON,
VO = 1 V, R(IREF) = 480 Ω
Constant current error
Device to device, averaged current from
OUT0 to OUT15,R(IREF) = 1920 Ω
(20 mA)
+0.4,
-2
∆IO(LC1)
Device to device, averaged current from
OUT0 to OUT15,R(IREF) = 480 Ω
(80 mA)
+2,
-2.7
∆IO(LC2)
±4
±4
±6
%
All output ON,
VO = 1 V, R(IREF) = 640 Ω
OUT0 to OUT15
±1
±1
Power supply rejection ratio,
PSRR
∆IO(LC3)
%/V
All output ON,
VO = 1 V, R(IREF) = 480 Ω
OUT0 to OUT15
All output ON,
VO = 1 V to 3 V,
R(IREF) = 640 Ω,
OUT0 to OUT15
±2
±2
±6
±8
∆IO(LC4)
Load regulation
%/V
All output ON,
VO = 1 V to 3 V,
R(IREF) = 480 Ω,
OUT0 to OUT15
T(TEF)
V(LED)
Thermal error flag threshold Junction temperature(1)
150
170
0.4
°C
LED open detection
threshold
0.3
V
Reference voltage
RI(REF) = 640 Ω
output
V(IREF)
1.20
1.24
1.28
V
(1) Not tested. Specified by design
4
TLC5941
www.ti.com
SLVS589–JULY 2005
SWITCHING CHARACTERISTICS
VCC = 3 V to 5.5 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SOUT
MIN
TYP
MAX UNIT
tr0
16
Rise time
ns
ns
OUTn, VCC = 5 V,
TA = 60°C, DCx = 3F
10
30
tr1
tf0
SOUT
16
30
Fall time
OUTn, VCC = 5 V,
TA = 60°C, DCx = 3F
10
tf1
(1)
tpd0
tpd1
SCLK - SOUT
30
60
ns
ns
ns
ns
ns
ns
(2)
BLANK - OUT0
(2)
tpd2
tpd3
tpd4
td
Propagation delay time
Output delay time
OUTn - XERR
1000
60
(2)
GSCLK - OUT0
XLAT - IOUT (dot correction)
1000
30
(2)
OUTn - OUT(n+1)
20
(1) See Figure 10
(2) See Figure 12
5
TLC5941
www.ti.com
SLVS589–JULY 2005
DEVICE INFORMATION
PWP PACKAGE
(TOP VIEW)
NT PACKAGE
(TOP VIEW)
OUT1
OUT0
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
28
GND
VCC
IREF
TEST
BLANK
XLAT
SCLK
SIN
MODE
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
MODE
SIN
27
26
25
24
23
22
21
20
19
18
17
16
15
3
GSCLK
SOUT
XERR
OUT15
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
SCLK
XLAT
BLANK
GND
4
5
Thermal
PAD
6
7
VCC
8
10
11
12
13
14
IREF
9
TEST
GSCLK
SOUT
XERR
OUT15
10
11
12
13
14
RHB PACKAGE
(TOP VIEW)
TEST
25
16 OUT10
15 OUT9
14 OUT8
13 NC
IREF 26
VCC 27
NC 28
THERMAL
PAD
NC 29
12 NC
GND 30
BLANK 31
XLAT 32
11 OUT7
10 OUT6
9
OUT5
NC − No internal connection
6
TLC5941
www.ti.com
SLVS589–JULY 2005
DEVICE INFORMATION (continued)
TERMINAL FUNCTION
TERMINAL
NT
PWP
NO.
RHB
NO.
I/O
DESCRIPTION
NAME
NO.
Blank all outputs. When BLANK = H, all OUTn outputs are forced OFF.
GS counter is also reset. When BLANK = L, OUTn are controlled by
grayscale PWM control.
BLANK
23
2
31
I
GND
22
18
20
-
1
30
G
I
Ground
GSCLK
IREF
25
27
-
24
Reference clock for grayscale PWM control
Reference current terminal
No connection
26
I
NC
12, 13, 28, 29
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
SCLK
SIN
28
1
7
4
5
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Constant-current output
Serial data shift clock
Serial data input
8
2
9
6
3
10
11
12
13
14
15
16
17
18
19
20
21
22
4
7
4
8
5
9
6
10
11
14
15
16
17
18
19
20
21
1
7
8
9
10
11
12
13
14
15
25
26
17
19
5
2
I
SOUT
TEST
24
26
23
25
O
I
Serial data output
Test pin: Connect to VCC
Power supply voltage. It is important to connect both pins to supply
voltage to ensure proper operation of the device.
VCC
21
27
16
28
6
27
3
I
I
Input mode-change pin. When MODE = GND, the device is in GS
mode. When MODE = VCC, the device is in DC mode.
MODE
XERR
Error output. XERR is an open-drain terminal. XERR goes L when
LOD or TEF is detected.
23
22
O
Data latch. Note that the internal connections are switched by MODE.
At XLAT↑ (MODE = GND), GS register gets new data. At XLAT↑
(MODE = VCC), DC register gets new data.
XLAT
24
3
32
I
7
TLC5941
www.ti.com
SLVS589–JULY 2005
PARAMETER MEASUREMENT INFORMATION
PIN EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS
Resistor values are equivalent resistance and not tested.
INPUT EQUIVALENT CIRCUIT
OUTPUT EQUIVALENT CIRCUIT (SOUT)
(BLANK, XLAT, SCLK, SIN, GSCLK, TEST)
VCC
23 W
23 W
400 W
INPUT
SOUT
GND
GND
INPUT EQUIVALENT CIRCUIT (IREF)
VCC
OUTPUT EQUIVALENT CIRCUIT (XERR)
23 W
Amp
XERR
_
400 W
+
INPUT
100 W
GND
GND
INPUT EQUIVALENT CIRCUIT (VCC)
OUTPUT EQUIVALENT CIRCUIT (OUT)
OUT
INPUT
GND
GND
INPUT EQUIVALENT CIRCUIT (MODE)
INPUT
GND
Figure 1. Input and Output Equivalent Circuits
8
TLC5941
www.ti.com
SLVS589–JULY 2005
PARAMETER MEASUREMENT INFORMATION (continued)
t
, t , t
, t , t
t
t
who wIO wh1 wl1 su0
su4, h4
V
(LED)
= 4 V
SOUT
Test Point
= 15 pF
R
L
= 51 W
C
L
OUTn
Test Point
C
L
= 15 pF
IOLC, IOLC3, IOLC4, IOUT/IREF
=
V
(LED)
1 V
OUT0
OUTn
V
= 0 V ~ 7 V
_
CC
+
OUT15
IREF
Test Point
= 640 W
R
IREF
Figure 2. Parameter Measurement Circuits
9
TLC5941
www.ti.com
SLVS589–JULY 2005
Typical Characteristics
REFERENCE RESISTOR
vs
OUTPUT CURRENT
POWER DISSIPATION RATE
vs
FREE-AIR TEMPERATURE
100 k
10 k
1 k
4000
TLC5941PWP+
TLC5941RHB
3000
2000
1000
TLC5941NT
3.84 k
TLC5941PWP−
1.92 k
1.28 k
0.96 k
0.79 k
0.64 k
0.55 k
0.48 k
0
−40
100
−20
0
20
40
60
80
0
10
20
30
40
50
60
70
80
I
− Output Current − mA
T
A
− Free-Air Temperature − 5C
O(LC)
Figure 3.
Figure 4.
OUTPUT CURRENT
vs
OUTPUT VOLTAGE
100
90
80
70
60
50
40
30
20
10
0
I
= 60 mA
MAX
I
= 30 mA
MAX
I
= 5 mA
MAX
0
0.20.4 0.6 0.8 1 1.21.4 1.61.8 2 2.22.4 2.6 2.8 3
V
O
− Output Voltage − V
Figure 5.
10
TLC5941
www.ti.com
SLVS589–JULY 2005
PRINCIPLES OF OPERATION
SERIAL INTERFACE
The TLC5941 includes a flexible serial interface, which can be connected to microcontrollers or digital signal
processors in various ways. Only 3 pins are needed to input data into the device. The rising edge of SCLK signal
shifts the data from the SIN pin to the internal register. After all data is clocked in, a rising edge of XLAT latches
the serial data to the internal registers. All data are clocked in with the MSB first. Multiple TLC5941 devices can
be cascaded by connecting the SOUT pin of one device with the SIN pin of the following device. The SOUT pin
can also be connected to the controller to receive status information from the TLC5941. The serial data format is
96-bit or 192-bit wide, depending on programming mode of the device.
DC Mode Data
Input Cycle
GS Mode Data
Input Cycle
DC Mode Data
Input Cycle
Vcc
MODE
t
h3
t
t
h3
su3
XLAT
SIN
DC n
MSB
DC n
LSB
GS
MSB
GS
LSB
DC n+1
MSB
DC n+1
MSB−1
t
h2
t
t
h2
t
su2
su2
1
96
1
192
193
1
2
SCLK
SOUT
DC n
MSB
DC n
LSB
DC
MSB
GS
MSB
SID
MSB
X
X
X
Figure 6. Serial Data Input Timing Chart
ERROR INFORMATION OUTPUT
The open-drain output XERR is used to report both of the TLC5941 error flags, TEF and LOD. During normal
operating conditions, the internal transistor connected to the XERR pin is turned off. The voltage on XERR is
pulled up to VCC through an external pullup resistor. If TEF or LOD is detected, the internal transistor is turned
on, and XERR is pulled to GND. Because XERR is an open-drain output, multiple ICs can be ORed together and
pulled up to VCC with a single pullup resistor. This reduces the number of signals needed to report a system error
(see Figure 13).
To differentiate LOD and TEF signal from XERR pin, LOD can be masked out with BLANK = HIGH.
Table 1. XERR Truth Table
ERROR CONDITION
TEMPERATURE
ERROR INFORMATION
SIGNALS
OUTn VOLTAGE
Don't Care
TEF
L
LOD
X
BLANK
XERR
TJ < T(TEF)
TJ > T(TEF)
H
L
H
L
L
L
H
Don't Care
H
X
OUTn > V(LED)
OUTn < V(LED)
OUTn > V(LED)
OUTn < V(LED)
L
L
TJ < T(TEF)
L
H
L
H
L
TJ > T(TEF)
H
H
11
TLC5941
www.ti.com
SLVS589–JULY 2005
TEF: THERMAL ERROR FLAG
The TLC5941 provides a temperature error flag (TEF) circuit to indicate an overtemperature condition of the IC. If
the junction temperature exceeds the threshold temperature (160°C typical), the TEF circuit trips and pulls XERR
to ground. TEF status can also be read out from the TLC5941 status register.
LOD: LED OPEN DETECTION
The TLC5941 provides an LED open-detection circuit (LOD). This circuit reports an error if any one of the 16
LEDs is open or disconnected from the circuit. The LOD circuit trips when the following two conditions are met
simultaneously:
1. BLANK is set to LOW
2. When the voltage at OUTn is less than V(LED) of 0.3 V (typical). (Note: the voltage at each OUTn is sampled
1 µs after being turned on.)
The LOD circuit also pulls XERR to GND when tripped. The LOD status of each channel can also be read out
from the TLC5941 status information data (SID) in GS data input cycle.
DELAY BETWEEN OUTPUTS
The TLC5941 has graduated delay circuits between outputs. These circuits can be found in the constant-current
driver block of the device (see functional block diagram). The fixed-delay time is 20 ns (typical), OUT0 has no
delay, OUT1 has 20 ns delay, and OUT2 has 40 ns delay, etc. The maximum delay is 300 ns from OUT0 to
OUT15. The delay works by switch on and switch off of each output channel. This means that the on/off time of
each channel is the same regardless of delay. These delays prevent large inrush currents and switching noise
which reduces the bypass capacitors when the outputs turn on.
OUTPUT ENABLE
All OUTn channels of TLC5941 can be switched off with one signal. When BLANK is set to high, all OUTn
channels are disabled, regardless of logic operations of the device. The grayscale counter is also reset. When
BLANK is set to low, all OUTn channels work under normal conditions.
Table 2. BLANK Signal Truth Table
BLANK
LOW
OUT0 - OUT15
Normal condition
Disabled
HIGH
SETTING MAXIMUM CHANNEL CURRENT
The maximum output current per channel is programmed by a single resistor, R(IREF), which is placed between
IREF pin and GND pin. The voltage on IREF is set by an internal band gap V(IREF) with a typical value of
1.24 V. The maximum channel current is equivalent to the current flowing through R(IREF) multiplied by a factor of
31.5. The maximum output current can be calculated by Equation 1:
V
(IREF)
I
+
31.5
max
R
(IREF)
(1)
where:
V(IREF) = 1.24 V
R(IREF) = User-selected external resistor.
Figure 3 shows the maximum output current IO versus R(IREF). R(IREF) is the value of the resistor between IREF
terminal to GND, and IO is the constant output current of OUT0 to OUT15.
12
TLC5941
www.ti.com
SLVS589–JULY 2005
POWER DISSIPATION CALCULATION
The device power dissipation needs to be below the power dissipation rate of the device package to ensure
correct operation. Equation 2ǒcaVlculates the power dissipation of device:
Ǔ
DC
n
+ ǒVCC CCǓ)
P
I
I
N
d
D
OUT
MAX
PWM
63
(2)
where:
VCC: device supply voltage
ICC: device supply current
VOUT: TLC5941 OUTn voltage when driving LED current
IMAX: LED current adjusted by R(IREF) Resistor
DCn: maximum dot correction value for OUTn
N: number of OUTn driving LED at the same time
dPWM: duty cycle defined by BLANK pin or GS PWM value
OPERATING MODES
Table 3 shows the available operating modes. The TLC5941 GS operating mode (see Figure 10) and shift
register values are not defined after power up. One solution to solve this is to set dot correction data after
TLC5941 power up and switch back to GS PWM mode. The other solution is to overflow the input shift register
with 193 bits of dummy data and latch it while TLC5941 is in GS PWM mode.
Table 3. MODE Signal Truth Table
MODE
LOW
INPUT SHIFT REGISTER
OPERATING MODE
Grayscale PWM Mode
192 bit
96 bit
HIGH
Dot Correction Data Input Mode
SETTING DOT CORRECTION
The TLC5941 has the capability to fine-adjust the output current of each channel (OUT0 to OUT15)
independently. This is also called dot correction. This feature is used to adjust the brightness deviations of LEDs
connected to the output channels OUT0 to OUT15. Each of the 16 channels can be programmed with a 6-bit
word. The channel output can be adjusted in 64 steps from 0% to 100% of the maximum output current Imax
.
Equation 3 determines the output current for each output n:
DCn
63
I
+ I
max
OUTn
where:
(3)
Imax = the maximum programmable output current for each output.
DCn = the programmed dot correction value for output n (DCn = 0 to 63).
n = 0 to 15
Dot correction data are entered for all channels at the same time. The complete dot correction data format
consists of 16 x 6-bit words, which forms a 96-bit wide serial data packet. The channel data is put one after
another. All data is clocked in with MSB first. Figure 7 shows the DC data format.
13
TLC5941
www.ti.com
SLVS589–JULY 2005
LSB
0
MSB
95
5
6
79
90
DC 0.0
DC 0.5
DC 1.0
DC 14.5 DC 15.0
DC 15.5
DC OUT0
DC OUT15
DC OUT2 − DC OUT14
Figure 7. Dot Correction Data Packet Format
To input data into the dot correction register, MODE must be set to VCC. The internal input shift register is then
set to 96-bit width. After all serial data are clocked in, a rising edge of XLAT is used to latch the data into the dot
correction register. Figure 8 shows the dc data input timing chart.
DC Mode Data
DC Mode Data
Input Cycle n
Input Cycle n+1
V
CC
MODE
SIN
DC n
MSB
DC n
MSB−1
DC n
MSB−2
DC n
LSB+1
DC n
LSB
DC n+1
MSB
DC n+1
MSB−1
DC n−1
LSB
t
wh0
SCLK
1
2
3
95
96
1
2
t
wl0
DC n−1
MSB
DC n−1
MSB−1
DC n−1
MSB−2
DC n−1
LSB+1
DC n−1
LSB
DC n
MSB
DC n
MSB−1
DC n
MSB−2
SOUT
XLAT
t
wh2
t
su1
t
h1
Figure 8. Dot Correction Data Input Timing Chart
SETTING GRAYSCALE
The TLC5941 can adjust the brightness of each channel OUTn using a PWM control scheme. The use of 12 bits
per channel results in 4096 different brightness steps, from 0% to 100% brightness. Equation 4 determines the
brightness level for each output n:
GSn
4095
Brightness in % +
100
(4)
where:
GSn = the programmed grayscale value for output n (GSn = 0 to 4095)
n = 0 to 15
Grayscale data for all OUTn
The input shift register enters grayscale data into the grayscale register for all channels simultaneously. The
complete grayscale data format consists of 16 x 12 bit words, which forms a 192-bit wide data packet (see
Figure 9). The data packet must be clocked in with the MSB first.
14
TLC5941
www.ti.com
SLVS589–JULY 2005
LSB
0
MSB
191
11
12
178
180
GS 0.0
GS 0.11 GS 0.0
GS 14.11 GS15.0
GS 15.11
GS OUT0
GS OUT2 − GS OUT14
GS OUT15
Figure 9. Grayscale Data Packet Format
When MODE is set to GND, the TLC5941 enters the grayscale data input mode. The device switches the input
shift register to 192-bit width. After all data is clocked in, a rising edge of the XLAT signal latches the data into
the grayscale register (see Figure 10). The first GS data input cycle after dot correction requires an additional
SCLK pulse after the XLAT signal to complete the grayscale update cycle. All GS data in the input shift register
is replaced with status information data (SID) after latching into the grayscale register.
DC Mode Data
Input Cycle
First GS Mode Data
Input Cycle After DC Data Input Cycle
Following GS Mode Data
Input Cycle
MODE
t
h3
t
su3
t
h3
XLAT
SIN
t
wh2
GS + 1
MSB
GS n + 1
LSB
GS
MSB
DC
LSB
GS
LSB
t
h1
t
t
h2
su2
t
su1
96
1
192
193
1
192
SCLK
SOUT
t
pd0
SID n + 1
MSB
SID
SID
MSB
SID
LSB
DC
MSB
DC n
LSB
GS
MSB
X
X
MSB−1
Figure 10. Grayscale Data Input Timing Chart
STATUS INFORMATION OUTPUT
The TLC5941 does have a status information register, which can be accessed in grayscale mode (MODE =
GND). After the XLAT signal latches the data into the GS register, the input shift register data is replaced with
status information data (SID) of the device (see Figure 10). LOD, TEF, and dot-correction register data can be
read out at the SOUT pin. The status information data packet is 192 bits wide. Bits 176 – 191 contain the LOD
status of each channel. Bit 175 contains the TEF status. Bits 72 – 167 contain the data of the dot-correction
register. The remaining bits are reserved. The complete status information data packet is shown in Figure 11.
LSB
0
MSB
191
71
X
72
167
168
X
175
176
X
DC 0.0
DC15.5
X
TEF
LOD 0
LOD 15
Reserved
DC Values
TEF
LOD Data
Figure 11. Status Information Data Packet Format
15
TLC5941
www.ti.com
SLVS589–JULY 2005
GRAYSCALE PWM OPERATION
The grayscale PWM cycle starts with the falling edge of BLANK. The first GSCLK pulse after BLANK increases
the grayscale counter by one and switches on all OUTn with grayscale value not zero. Each following rising edge
of GSCLK increases the grayscale counter by one. The TLC5941 compares the grayscale value of each output
OUTn with the grayscale counter value. All OUTn with grayscale values equal to counter values are switched off.
A BLANK=H signal after 4096 GSCLK pulses resets the grayscale counter to zero and completes the grayscale
PWM cycle (see Figure 12).
GS PWM
Cycle n
GS PWM
Cycle n+1
BLANK
GSCLK
t
wl1
t
t
su4
t
wh1
t
h4
wh3
4096
1
2
3
1
t
wl1
t
t
t
pd4
pd1
pd3
OUT0
(Current)
n x t
d
t + n x t
pd3 d
t
+ t
d
pd1
OUT1
(Current)
t
+ 15 x t
d
pd1
OUT15
(Current)
t
pd3
XERR
Figure 12. Grayscale PWM Cycle Timing Chart
SERIAL DATA TRANSFER RATE
Figure 13 shows a cascading connection of n TLC5941 devices connected to a controller, building a basic
module of an LED display system. The maximum number of cascading TLC5941 devices depends on the
application system and is in the range of 40 devices. Equation 5 calculates the minimum frequency needed:
f
4096
f
(GSCLK)
(update)
f
+ 193 f
n
(SCLK)
(update)
(5)
where:
f(GSCLK): minimum frequency needed for GSCLK
f(SCLK): minimum frequency needed for SCLK and SIN
f(update): update rate of whole cascading system
n: number cascaded of TLC5941 device
16
TLC5941
www.ti.com
SLVS589–JULY 2005
Application Example
V
V
V
V
V
(LED)
CC
(LED)
(LED)
(LED)
100 k
OUT0
OUT15
SOUT
OUT0
OUT15
SOUT
SIN
SIN
SIN
XERR
SCLK
XERR
SCLK
XLAT
GSCLK
XERR
SCLK
XLAT
V
V
CC
CC
100 nF
100 nF
XLAT
TLC5941
IC 0
TLC5941
IC n
GSCLK
MODE
BLANK
TEST
GSCLK
MODE
BLANK
TEST
MODE
IREF
IREF
Controller
V
BLANK
SOUT
CC
V
CC
6
Figure 13. Cascading Devices
17
PACKAGE OPTION ADDENDUM
www.ti.com
21-Oct-2005
PACKAGING INFORMATION
Orderable Device
TLC5941PWP
Status (1)
ACTIVE
ACTIVE
ACTIVE
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
HTSSOP
PWP
28
28
28
50 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
TLC5941PWPR
TLC5941PWPRG4
HTSSOP
HTSSOP
PWP
PWP
2000 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
2000 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
TLC5941RHB
PREVIEW
ACTIVE
QFN
QFN
RHB
RHB
32
32
TBD
Call TI
Call TI
TLC5941RHBR
3000 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
TLC5941RHBRG4
ACTIVE
QFN
RHB
32
3000 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR
no Sb/Br)
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan
-
The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS
&
no Sb/Br)
-
please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
IMPORTANT NOTICE
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www.ti.com/wireless
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Post Office Box 655303 Dallas, Texas 75265
Copyright 2005, Texas Instruments Incorporated
TLC5941RHBTG4 CAD模型
原理图符号
PCB 封装图
TLC5941RHBTG4 替代型号
| 型号 | 制造商 | 描述 | 替代类型 | 文档 |
| TLC5941RHBR | TI | 16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL | 完全替代 |
|
| TLC5941RHBRG4 | TI | 16-CHANNEL LED DRIVER WITH DOT CORRECTION AND GRAYSCALE PWM CONTROL | 完全替代 |
|
TLC5941RHBTG4 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| TLC5942 | TI | 16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction | 获取价格 |
|
| TLC5942PWP | TI | 16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction | 获取价格 |
|
| TLC5942PWPG4 | TI | IC LED DRIVER LIN 50MA 28HTSSOP | 获取价格 |
|
| TLC5942PWPR | TI | 16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction | 获取价格 |
|
| TLC5942RHBR | TI | 16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction | 获取价格 |
|
| TLC5942RHBRG4 | TI | LED DISPLAY DRIVER, PQCC32, 5 X 5 MM, GREEN, PLASTIC, QFN-32 | 获取价格 |
|
| TLC5942RHBT | TI | 16-Channel, 12-Bit PWM LED Driver with 7-Bit Dot Correction | 获取价格 |
|
| TLC5943 | TI | 16-Channel, 16-Bit PWM LED Driver with 7-Bit Global Brightness Control | 获取价格 |
|
| TLC5943PWP | TI | 16-Channel, 16-Bit PWM LED Driver with 7-Bit Global Brightness Control | 获取价格 |
|
| TLC5943PWPR | TI | 16-Channel, 16-Bit PWM LED Driver with 7-Bit Global Brightness Control | 获取价格 |
|
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