TLC5927 16 位恒流下沉式 LED 驱动器

TLC5927 描述

The TLC5926/TLC5927 is designed for LED displays and LED lighting applications with open-load, shorted-load, and overtemperature detection, and constant-current control. The TLC5926/TLC5927 contains a 16-bit shift register and data latches, which convert serial input data into parallel output format. At the TLC5926/TLC5927 output stage, 16 regulated-current ports provide uniform and constant current for driving LEDs within a wide range of VF (Forward Voltage) variations. Used in systems designed for LED display applications (e.g., LED panels), TLC5926/TLC5927 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. TLC5926/TLC5927 is 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 TLC5926/TLC5927 provides a Special Mode in which two functions are included, Error Detection and Current Gain Control. In the TLC5926/TLC5927 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, and when an one-clock-wide short pulse appears on OE(ED2), TLC5926/TLC5927 enters the Mode Switching phase. At this time, the voltage level on LE(ED1) determines the next mode into which the TLC5926/TLC5927 switches. In the Normal Mode phase, the serial data is transferred into TLC5926/TLC5927 via SDI, shifted in the shift register, and transferred out via 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 tell if the driving current level is enough or not. The detected error status is loaded into the 16-bit shift register and shifted out via SDO, along with the CLK signal. The system controller can read the error status to determine whether or not the LEDs are properly lit. In the Special Mode phase, TLC5926/TLC5927 also allows users to adjust the output current level by setting a runtime-programmable Configuration Code. The code is sent into TLC5926/TLC5927 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 R-EXT and controls the output-current regulator. The output current can be adjusted finely 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%, and this feature is suitable for white balancing in LED color-display panels.

TLC59025 TLC5916 TLC5917 TLC5925 TLC5926 TLC5927
Output Channels 16   8   8   16   16   16  
Analog Dimming Steps   256   256     256   256  
Per Channel Drive(mA) 45   120   120   45   120   120  
Ch to Ch Accuracy(Typ)(+/- %) 5   3   3   4   6   6  
Data Input Serial   Serial   Serial   Serial   Serial   Serial  
Data Transfer Rate(Typ)(MHz) 30   30   30   30   30   30  
Data Vin(Min)(V) 3   3   3   3   3.0   3.0  
Data Vin(Max)(V) 5.5   5.5   5.5   5.5   5.5   5.5  
LED Voltage(Max)(V) 17   17   17   17   17   17  
Pin/Package 24SSOP/QSOP   16SOIC, 16TSSOP, 16PDIP   16PDIP, 16SOIC, 16TSSOP   24SSOP/QSOP, 24SOIC, 24TSSOP   24HTSSOP, 24SOIC, 24SSOP/QSOP   24HTSSOP, 24SOIC, 24SSOP/QSOP  
Approx. Price (US$) 0.55 | 1ku   0.47 | 1ku   0.60 | 1ku   0.50 | 1ku   0.60 | 1ku   0.65 | 1ku
TLC5927 特性
TLC5927 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
TLC5927IDBQR ACTIVE -40 to 85 0.50 | 1ku SSOP/QSOP (DBQ) | 24 2500 | LARGE T&R TLC5927I
TLC5927IDBQRG4 ACTIVE -40 to 85 0.50 | 1ku SSOP/QSOP (DBQ) | 24 2500 | LARGE T&R TLC5927I
TLC5927IDWR ACTIVE -40 to 85 0.50 | 1ku SOIC (DW) | 24 2000 | LARGE T&R TLC5927I
TLC5927IDWRG4 ACTIVE -40 to 85 0.50 | 1ku SOIC (DW) | 24 2000 | LARGE T&R TLC5927I
TLC5927IPWR ACTIVE -40 to 85 0.50 | 1ku TSSOP (PW) | 24 2000 | LARGE T&R Y5927
TLC5927IPWRG4 ACTIVE -40 to 85 0.50 | 1ku TSSOP (PW) | 24 2000 | LARGE T&R Y5927
TLC5927 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
TLC5927IDBQR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR TLC5927IDBQR TLC5927IDBQR
TLC5927IDBQRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-2-260C-1 YEAR TLC5927IDBQRG4 TLC5927IDBQRG4
TLC5927IDWR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM TLC5927IDWR TLC5927IDWR
TLC5927IDWRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM TLC5927IDWRG4 TLC5927IDWRG4
TLC5927IPWR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM TLC5927IPWR TLC5927IPWR
TLC5927IPWRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM TLC5927IPWRG4 TLC5927IPWRG4
TLC5927 应用技术支持与电子电路设计开发资源下载
  1. TLC5927 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)
TLC5927 相关工具
名称 型号 公司 工具/软件类型
TLC5927 评估模块 TLC5927EVM-160 Texas Instruments 开发电路板/EVM
TLC5927 评估模块 TLC5927EVM-543 Texas Instruments 开发电路板/EVM
TLC5927 评估模块 TLC5927EVM Texas Instruments 开发电路板/EVM