TPS92512
- Integrated 200-mΩ High-Side MOSFET
- 4.5-V to 42-V Input Voltage Range
(4.5 V to 60 V for the TPS92512HV) - 0 V to 300 mV Adjustable Voltage Reference
- ±5% LED Current Accuracy
- 100-kHz to 2-MHz Switching Frequency Range
- Dedicated PWM Dimming Input
- Adjustable Undervoltage-Lock-Out
- Overcurrent Protection
- Overtemperature Protection
- MSOP-10 Package with PowerPAD
The TPS92512/HV are 2.5A step-down (buck) current regulators with an integrated MOSFET to drive high current LEDs. Available with 42 V and 60 V (HV) input ranges, these LED drivers operate at a user selected fixed-frequency with peak-current mode control and deliver excellent line and load regulation.
The TPS92512/HV LED drivers feature separate inputs for analog and pulse width modulation (PWM) dimming for no compromise brightness control achieving contrast ratios of greater than 10:1 and greater than 100:1, respectively. The PWM input is compatible with low-voltage logic standards for easy interface to a broad range of microcontrollers. The analog LED current setpoint is adjustable from 0 V to 300 mV using the IADJ input with an external 0 V to 1.8 V signal.
For multi-string applications using two or more TPS92512/HV LED drivers, the internal oscillator can be overdriven by an external clock ensuring all of the converters operate at a common frequency thereby reducing the potential for beat frequencies and simplifying system EMI filtering. An adjustable input under-voltage lockout (UVLO) with hysteresis provides flexibility in setting start/stop voltages based upon supply voltage conditions.
The TPS92512 includes cycle-by-cycle overcurrent protection and thermal shutdown protection. It is available in a 10-pin HVSSOP PowerPAD™ package.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | TPS92512 2.5A Buck LED Driver with Integrated Analog Current Adjust 数据表 (Rev. B) | PDF | HTML | 2015-4-20 | ||
| 白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020-9-21 | |||
| 应用手册 | 基于TPS92512的反相Buck-Boost电路在照明中的应用 | 2019-6-13 | ||||
| 技术文章 | Designing an IoT modular light – part 2 | PDF | HTML | 2016-6-24 | |||
| 技术文章 | Designing an IoT modular light | PDF | HTML | 2016-6-17 | |||
| 技术文章 | Driving LEDs with both analog and PWM dimming | PDF | HTML | 2015-10-13 | |||
| 技术文章 | Driving LEDs in battery-powered portable projectors | PDF | HTML | 2015-8-25 |
设计与开发
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TPS92512EVM-001 — 具有模拟和 PWM 调光功能的 TPS92512 降压稳压器
TPS92512EVM 可接受 12V 至 60V 的输入电压范围，可驱动高达 1.5A 的大电流 LED 堆叠，同时具有小巧的外形。LED 栈可在 9V 至 24V 之间，具体取决于输入电压范围。该电路可以使用模拟电流调节功能和/或 PWM 调光功能进行调光。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HVSSOP (DGQ) | 10 | Ultra Librarian |
订购和质量
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