TPS75103 Low Dropout Matching LED Current Source
TPS75103 描述
The TPS7510x linear low dropout (LDO) matching LED current source is optimized for low power keypad and navigation pad LED backlighting applications. The device provides a constant current to up to four unmatched LEDs organized in two banks of two LEDs each in a common-cathode topology. Without an external resistor, the current source defaults to factory-programmable, preset current level with ±0.5% accuracy (typical). An optional external resistor can be used to set initial brightness to user-programmable values with higher accuracy. Brightness can be varied from off to full brightness by inputting a pulse width modulation (PWM) signal on each Enable pin. Each bank has independent enable and brightness control, but current matching is done to all four channels concurrently.
|
TPS75103 |
TPS75105 |
| Topology |
LDO |
LDO |
| Type |
Linear |
Linear |
| Vin(Min)(V) |
2.7 |
2.7 |
| Vin(Max)(V) |
5.5 |
5.5 |
| Output Voltage(Max)(V) |
3.6 |
3.6 |
| LED(#) |
2 x 2 |
2 x 2 |
| LED Configuration |
Parallel |
Parallel |
| Peak Efficiency(%) |
87 |
87 |
| Iq(Typ)(mA) |
0.18 |
0.18 |
| Operating Temperature Range(°C) |
|
-40 to 85 |
| Pin/Package |
9DSBGA |
10SON, 9DSBGA |
| Iout(Max)(A) |
0.025 |
0.025 |
TPS75103 特性
- Regulated Output Current with 2% LED-to-LED Matching
- Drives Up to Four LEDs at 25mA Each in a Common Cathode Topology
- 28mV Typical Dropout Voltage Extends Usable Supply Range in Li-Ion Battery Applications
- Brightness Control Using PWM Signals
- Two 2-LED Banks with Independent Enable and PWM Brightness Control per Bank
- No Internal Switching Signals—Eliminates EMI
- Default LED Current Eliminates External Components
- Default values from 3mA to 10mA (in 1mA increments) available using innovative factory EEPROM programming
- Optional external resistor can be used for high-accuracy, user-programmable current
- Over-Current and Over-Temperature Protection
- Available in Wafer Chip-Scale Package or 2,5mm × 2,5mm SON-10
- APPLICATIONS
- Keypad and Display Backlighting
- White and Color LEDs
- Cellular Handsets
- PDAs and Smartphones
TPS75103 芯片订购指南
| 器件 |
状态 |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| TPS75103YFFR |
ACTIVE |
0.65 | 1ku |
DSBGA (YFF) | 9 |
3000 | LARGE T&R |
FC |
| TPS75103YFFT |
ACTIVE |
0.70 | 1ku |
DSBGA (YFF) | 9 |
250 | SMALL T&R |
FC |
TPS75103 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 |
| TPS75103YFFR |
Green (RoHS & no Sb/Br) |
SNAGCU |
Level-1-260C-UNLIM |
TPS75103YFFR |
TPS75103YFFR |
| TPS75103YFFT |
Green (RoHS & no Sb/Br) |
SNAGCU |
Level-1-260C-UNLIM |
TPS75103YFFT |
TPS75103YFFT |
TPS75103 应用技术支持与电子电路设计开发资源下载
- TPS75103 数据资料 dataSheet 下载.PDF
- TI 德州仪器LDO低压差线性稳压器驱动器选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- LDO PSRR Measurement Simplified
(PDF 140 KB)
- LDO Noise Demystified
(PDF 782 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)
TPS75103 工具与软件