首页 > TI 德州仪器 > 电源管理 > 照明解决方案

TLC5917-Q1 汽车类 8 位恒流下沉式 LED 驱动器

TLC5917-Q1 描述

The TLC5916/TLC5917 is designed for LED displays and LED lighting applications with constant-current control and open-load, shorted-load, and overtemperature detection. The TLC5916/TLC5917 contains an 8-bit shift register and data latches, which convert serial input data into parallel output format. At the output stage, eight regulated current ports are designed to provide uniform and constant current for driving LEDs within a wide range of VF variations. Used in system design for LED display applications, e.g., LED panels, it provides great flexibility and device performance. Users can adjust the output current from 5 mA to 120 mA through an external resistor, Rext, which gives flexibility in controlling the light intensity of LEDs. The devices are designed for up to 17 V at the output port. The high clock frequency, 30 MHz, also satisfies the system requirements of high-volume data transmission. The TLC5916/TLC5917 provides a Special Mode in which two functions are included, Error Detection and Current Gain Control. There are two operation modes and three phases: Normal Mode phase, Mode Switching transition phase, and Special Mode phase. The signal on the multiple function pin OE(ED2) is monitored to determine the mode. When an one-clock-wide pulse appears on OE(ED2), the device enters the Mode Switching phase. At this time, the voltage level on LE(ED1) determines the mode to which the TLC5916/TLC5917 switches. In the Normal Mode phase, the serial data can be transferred into TLC5916/TLC5917 via the pin SDI, shifted in the shift register, and transferred out via the pin SDO. LE(ED1) can latch the serial data in the shift register to the output latch. OE(ED2) enables the output drivers to sink current. In the Special Mode phase, the low-voltage-level signal OE(ED2) can enable output channels and detect the status of the output current, to determine if the driving current level is sufficient. The detected Error Status is loaded into the 8-bit shift register and shifted out via the pin SDO, synchronous to the CLK signal. The system controller can read the error status and determine whether or not the LEDs are properly lit. In the Special Mode phase, the TLC5916/TLC5917 allows users to adjust the output current level by setting a runtime-programmable Configuration Code. The code is sent into the TLC5916/TLC5917 via SDI. The positive pulse of LE(ED1) latches the code in the shift register into a built-in 8-bit configuration latch, instead of the output latch. The code affects the voltage at the terminal R-EXT and controls the output-current regulator. The output current can be finely adjusted by a gain ranging from 1/12 to 127/128 in 256 steps. Therefore, the current skew between ICs can be compensated within less than 1%. This feature is suitable for white balancing in LED color display panels.

	TLC5917-Q1
Output Channels	8
Analog Dimming Steps	256
Per Channel Drive(mA)	120
Ch to Ch Accuracy(Typ)(+/- %)	3
Data Input	Serial
Data Transfer Rate(Typ)(MHz)	30
Data Vin(Min)(V)	3
Data Vin(Max)(V)	5.5
LED Voltage(Max)(V)	17
Pin/Package	16SOIC
Approx. Price (US$)	0.70 | 1ku

TLC5917-Q1 特性

• Qualified for Automotive Applications
• Eight Constant-Current Output Channels
• Output Current Adjusted Through External Resistor
• Constant Output Current Range: 5 mA to 120 mA
• Constant Output Current Invariant to Load Voltage Change
• Open Load, Short Load, and Overtemperature Detection
• 256-Step Programmable Global Current Gain
• Excellent Output Current Accuracy:
  • Between Channels: < ±3% (Max)
  • Between ICs: < ±6% (Max)
• Fast Response of Output Current
• 30-MHz Clock Frequency
• Schmitt-Trigger Input
• 3.3-V or 5-V Supply Voltage
• Thermal Shutdown for Overtemperature Protection
• APPLICATIONS
  • General LED Lighting Applications
  • LED Display Systems
  • LED Signage
  • Automotive LED Lighting

TLC5917-Q1 芯片订购指南

器件	状态	温度 (oC)	价格（美元） | Quantity	封装 | 引脚	封装数量 | 封装载体	丝印标记
TLC5917QDRQ1	ACTIVE	-40 to 125	0.55 | 1ku	SOIC (DW) | 16	2500	TLC5917Q

TLC5917-Q1 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
TLC5917QDRQ1	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	TLC5917QDRQ1	TLC5917QDRQ1

TLC5917-Q1 应用技术支持与电子电路设计开发资源下载

1. TLC5917-Q1 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. PowerPAD™ 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)