TPS75105
- Regulated Output Current with 2% LED-to-LED Matching
- Drives Up to Four LEDs at 25 mA Each in a Common Cathode Topology
- 28-mV 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 3 mA to 10 mA (in 1-mA 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 2.50-mm × 2.50-mm WSON-10
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 a 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 (ENx, where x indicates LED bank A or B). Each bank has independent enable and brightness control, but current matching is done to all four channels concurrently. The input supply range is ideally suited for single-cell Li-Ion battery supplies and the TPS7510x can provide up to 25 mA per LED.
No internal switching signals are used, eliminating troublesome electromagnetic interference (EMI). The TPS7510x is offered in an ultra-small, 9-ball, 0.4-mm ball-pitch wafer chip-scale package (WCSP) and a 2.50-mm × 2.50-mm, 10-pin WSON package, yielding a very compact total solution size ideal for mobile handsets and portable backlighting applications. The device is fully specified over TJ = –40°C to +85°C.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS7510x Low Dropout, Two-Bank LED Driver With PWM Brightness Control datasheet (Rev. J) | PDF | HTML | 2016/11/18 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 應用說明 | LDO Noise Demystified (Rev. B) | PDF | HTML | 2020/8/18 | |||
| 應用說明 | How to Select a RGB LED Driver | 2019/8/8 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 應用說明 | LDO PSRR Measurement Simplified (Rev. A) | PDF | HTML | 2017/8/9 | |||
| 類比設計期刊 | Driving a WLED does not always require 4 V | 2007/10/12 | ||||
| 應用說明 | Linear Matched Independent Current Source vs Traditional WLED Driver Solutions | 2007/3/30 | ||||
| 類比設計期刊 | LDO white-LED driver TPS7510x provides incredibly small solution size | 2006/12/14 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
TPS75105DSKEVM-529 — TPS75105DSKEVM-529 評估模組
TPS75105EVM-174 — TPS75105EVM-174 評估模組
The TPS75105EVM-174 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS75105 low-dropout linear regulator (LDO), two-bank LED driver withPWM dimming.
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WSON (DSK) | 10 | Ultra Librarian |
| DSBGA (YFF) | 9 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。