TLC5944 具有 6 位点校正功能和预充电 FET 的 16 通道 12 位 PWM LED 驱动器
TLC5944 描述
The TLC5944 is a 16-channel, constant current sink driver. Each channel is individually adjustable with 4096 pulse-width modulated (PWM) steps and 64 constant sink current (dot correction) steps. The dot correction (DC) adjusts for brightness variations between LEDs. Both grayscale (GS) control and DC are accessible via a common serial interface port. The maximum current value of all 16 channels can be set by a single external resistor.
The TLC5944 has an internal pre-charge FET to prevent the ghost-lighting phenomenon that occurs on multiplexed LED systems. The TLC5944 has three error detection circuits for LED open detection (LOD), a thermal error flag (TEF), and a pre-thermal warning (PTW). The LOD detects a broken or disconnected LED, and a shorted LED to GND during the display period
|
TLC5940 |
TLC59401 |
TLC5941 |
TLC5942 |
TLC5943 |
TLC5944 |
TLC5945 |
TLC5946 |
TLC59461 |
| Output Channels |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
16 |
| PWM Dimming Steps |
4096 |
4096 |
4096 |
4096 |
65536 |
4096 |
4096 |
4096 |
4096 |
| Analog Dimming Steps |
64 |
64 |
64 |
64 |
128 |
64 |
64 |
64 |
64 |
| Per Channel Drive(mA) |
120 |
0~80mA(Vcc≤3.6V) ,0~120mA(Vcc>3.6V) |
80 |
50 |
50 |
60 |
80 |
40 |
40 |
| Ch to Ch Accuracy(Typ)(+/- %) |
1 |
1 |
1 |
1.5 |
1.5 |
1 |
1 |
1 |
1 |
| Data Input |
Serial |
Serial |
Serial |
Serial |
Serial |
Serial |
Serial |
Serial |
Serial |
| Data Transfer Rate(Typ)(MHz) |
30 |
30 |
30 |
30 |
30 |
30 |
30 |
30 |
30 |
| Data Vin(Min)(V) |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
| Data Vin(Max)(V) |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
5.5 |
| LED Voltage(Max)(V) |
17 |
17 |
17 |
17 |
17 |
15 |
17 |
17 |
17 |
| Pin/Package |
28HTSSOP, 28PDIP, 32QFN |
28HTSSOP, 32QFN |
28HTSSOP, 28PDIP, 32QFN |
28HTSSOP, 32QFN |
28HTSSOP, 32QFN |
28HTSSOP, 32QFN |
28HTSSOP, 32QFN |
28HTSSOP, 28TSSOP, 32QFN |
28HTSSOP |
| Approx. Price (US$) |
1.25 | 1ku |
1.80 | 1ku |
1.00 | 1ku |
1.10 | 1ku |
1.25 | 1ku |
1.10 | 1ku |
1.10 | 1ku |
1.00 | 1ku |
1.05 | 1ku |
TLC5944 特性
- 16 Channels, Constant Current Sink Output
- 60-mA Capability (Constant Current Sink)
- 12-Bit (4096 Steps) Grayscale Control with PWM
- 6-Bit (64 Steps) Dot Correction with Sink Current
- Internal Pre-Charge FET to Prevent LED Ghosting Phenomenon on Multiplexed LED Systems
- LED Power-Supply Voltage up to 15 V
- VCC = 3.0 V to 5.5 V
- Constant Current Accuracy:
- Channel-to-Channel = ±1%
- Device-to-Device = ±3%
- CMOS Logic Level I/O
- 30-MHz Data Transfer Rate
- 33-MHz Grayscale Control Clock
- Continuous Base LED Open Detection (LOD):
- Detect LED opening and LED short to GND during display with auto output off function
- Thermal Shutdown (TSD):
- Automatic shutdown at over-temperature conditions
- Restart under normal temperature
- Pre-Thermal Warning (PTW):
- High temperature operation alert
TLC5944 芯片订购指南
| 器件 |
状态 |
|
价格（美元） | Quantity |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TLC5944PWP |
ACTIVE |
-40 to 85 |
2.20 | 1ku |
HTSSOP (PWP) | 28 |
50 | TUBE |
|
| TLC5944PWPR |
ACTIVE |
-40 to 85 |
1.80 | 1ku |
HTSSOP (PWP) | 28 |
2000 | LARGE T&R |
|
| TLC5944RHBR |
ACTIVE |
-40 to 85 |
2.00 | 1ku |
QFN (RHB) | 32 |
3000 | LARGE T&R |
|
| TLC5944RHBT |
ACTIVE |
-40 to 85 |
2.25 | 1ku |
QFN (RHB) | 32 |
3000 | LARGE T&R |
|
TLC5944 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| TLC5944PWP |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TLC5944PWP |
TLC5944PWP |
| TLC5944PWPR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TLC5944PWPR |
TLC5944PWPR |
| TLC5944RHBR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TLC5944RHBR |
TLC5944RHBR |
| TLC5944RHBT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TLC5944RHBT |
TLC5944RHBT |
TLC5944 应用技术支持与电子电路设计开发资源下载
- TLC5944 数据资料 dataSheet 下载.PDF
- TI 德州仪器照明解决方案产品选型与价格 . xls
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(PDF 1058 KB)
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- 高速数据转换 (PDF 1967 KB)
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