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

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
TLC5970DAP	PREVIEW	-40 to 85		HTSSOP (DAP) | 38
TLC5970DAPR	PREVIEW	-40 to 85		HTSSOP (DAP) | 38
TLC5970RHPR	ACTIVE	-40 to 85	3.30 | 1ku	VQFN (RHP) | 28	1000 | LARGE T&R
TLC5970RHPT	ACTIVE	-40 to 85	3.75 | 1ku	VQFN (RHP) | 28	250 | SMALL T&R

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

1. TLC5970 数据资料 dataSheet 下载.PDF
2. TI 德州仪器照明解决方案产品选型与价格 . xls
3. 照明和显示屏电源选择指南 (PDF 1427 KB)
4. 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
5. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A) (PDF 2206 KB)
6. PowerPADTM Made Easy (PDF 57 KB)
7. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
9. 所选封装材料的热学和电学性质 (PDF 645 KB)
10. 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