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
- 16 Constant-Current Output Channels
- Output Current Adjusted By External Resistor
- Constant Output Current Range: 5 mA to 120 mA
- Constant Output Current Invariant to Load Voltage Change
- Open-Load, Shorted-Load and Overtemperature Detection
- 256-Step Programmable Global Current Gain
- Excellent Output-Current Accuracy:
- Between Channels: < ±6% (Max), 10 mA to 50 mA
- Between ICs: < ±6% (Max), 10 mA to 50 mA
- 30-MHz Clock Frequency
- Schmitt-Trigger Input
- 3.3-V or 5-V Supply Voltage
- Thermal Shutdown for Overtemperature Protection
- ESD Performance: 2-kV HBM
- APPLICATIONS
- General LED Lighting Applications
- LED Display Systems
- LED Signage
- Automotive LED Lighting
- White Goods
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
- TLC5927 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)
TLC5927 相关工具
