TPS61185
- 4.2 V to 24 V Input Voltage
- Integrated 2 A/40 V MOSFET
- 600 kHz to 2 MHz Programmable Switching Frequency
- Adaptive Boost Output for Best Efficiency
- Design to Use Small L-C Components
- Integrated Loop Compensation
- Eight 25 mA Current Sinks
- Up to 10 WLED in Series
- 1% Current Matching and Accuracy
- PWM Brightness Interface Control
- 200 mV Ripple Under PWM Dimming
- Driver for Input/Output Isolation PFET
- Programmable Over Voltage Threshold
- 100 Hz to 5 kHz Programmable PWM Dimming Frequency
- Up to 20 kHz Direct PWM Dimming Frequency
- Enhanced Electrostatic Discharge Immunity Level
- Built-in WLED Open/Short Protection
- Over Temperature Protection
- 24 Pin 4 mm × 4 mm QFN Package
- APPLICATIONS
- Notebook LCD Display Backlight
The TPS61185 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2 A/40 V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 80 LEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.
The TPS61185 supports the PWM method for brightness dimming. Simply tie the unused current sinks to ground if fewer than eight are needed. During PWM dimming, each of the eight current regulators is turned on/off at the duty cycle determined by an external pulse width modulation (PWM) signal input to the PWM pin. The frequency at which each current regulator turns on/off follows the input PWM signal on the PWMIN pin if the MODE pin is grounded. If the MODE pin is left floating or tied high, the regulators turn on/off at the frequency programmed by an external resistor on the FPWMO pin.
The TPS61185 IC supports boost switch frequency programming from 600kHz to 2MHz by an external resistor on the FSW pin. The device also provides a driver output for an optional external PFET connected between the input and inductor for truly disconnecting the battery from LED during the shutdown or fault protection. The device integrates resistor programmable over-voltage protection, soft-start, and thermal shutdown.
The TPS61185 IC has a built-in linear regulator to power the internal circuits of the IC. The device is in a 4 mm × 4 mm QFN package.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | WLED Driver for Notebooks with PWM Control Interface 数据表 (Rev. A) | 2010年 5月 18日 | |||
白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020年 9月 21日 | |||
应用手册 | Some Guidelines and Tips for the LED Driver Application | 2019年 8月 14日 | ||||
应用手册 | Performing Accurate PFM Mode Efficiency Measurements (Rev. A) | 2018年 12月 11日 | ||||
选择指南 | 电源管理指南 2018 (Rev. K) | 2018年 7月 31日 | ||||
选择指南 | 电源管理指南 2018 (Rev. R) | 2018年 6月 25日 | ||||
EVM 用户指南 | TPS61185EVM-335 | 2010年 5月 25日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
TPS61185EVM-335 — 用于 TPS61185 2A WLED 驱动器 IC 的评估模块
PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®
借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。
在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
封装 | 引脚 | 下载 |
---|---|---|
VQFN (RGE) | 24 | 查看选项 |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。