TLC5970 具有 DC-DC 降压转换器和差动信号接口的 3 通道、12 位 PWM LED 驱动器
TLC5970 描述
The TLC5970 is a three-channel, constant-current sink driver with a buck dc/dc converter and a differential signal interface. Each channel has individually adjustable currents with 4096 PWM grayscale (GS) steps and 128 constant-current sink steps for dot correction (DC). The dot correction adjusts the brightness variations between LEDs. The DC data can be stored in the internal EEPROM. Also, current through all three channels can be controlled by global brightness control (BC) data with 128 steps. GS control, DC, and BC are accessible via a differential signal interface. The maximum current value for each channel is set by a single external resistor. The TLC5970 contains a dc/dc buck converter. The dc/dc converter improves system efficiency, reduces system level currents, and allows thinner gauge wiring by optimizing the LED anode voltage to keep the LED cathode voltage to 1 V.
|
TLC5970 |
| Output Channels |
3 |
| PWM Dimming Steps |
4096 |
| Ch to Ch Accuracy(Typ)(+/- %) |
0.5 |
| Data Input |
Serial |
| Data Transfer Rate(Typ)(MHz) |
20 |
| Pin/Package |
28VQFN |
| Approx. Price (US$) |
3.30 | 1ku |
TLC5970 特性
- 3-Channel, Constant-Current Sink Output
- Current Capability: 150 mA per channel
- Grayscale (GS) Control with PWM:
12-bit (4096 steps)
- Dot Correction (DC): 7-bit (128 steps)
- Global Brightness Control (BC):
7-bit (128 steps)
- EEPROM for Dot Correction Storage
- Input Voltage: Up to 36 V
- LED Supply Voltage: Up to 17 V with Auto LED Anode Voltage Control
- Constant-Current Accuracy:
- Channel-to-Channel = ±0.5% (typ)
- Device-to-Device = ±3% (typ)
- Data Transfer Rate: 20 MHz
- Differential Signal Interface for Long Distance Cascading
- Unlimited Device Cascading
- Auto Display Repeat/Auto Data Refresh
- Internal/External Selectable GS Clock
- Thermal Shutdown (TSD)
- Package: QFN-28
- APPLICATIONS
- Full-Color Static LED Displays for Building Wall
TLC5970 芯片订购指南
TLC5970 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 |
| TLC5970DAP |
|
|
|
TLC5970DA |
TLC5970DA |
| TLC5970DAPR |
|
|
|
TLC5970DAR |
TLC5970DAR |
| TLC5970RHPR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TLC5970RHPR |
TLC5970RHPR |
| TLC5970RHPT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
TLC5970RHPT |
TLC5970RHPT |
TLC5970 应用技术支持与电子电路设计开发资源下载
- TLC5970 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
- 照明和显示屏电源选择指南 (PDF 1427 KB)
- 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- PowerPAD™ Made Easy (PDF 57 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
TLC5970 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| TLC5970 评估模块 |
TLC5970EVM |
Texas Instruments |
开发电路板/EVM |
