TPS54200
- 4.5-V to 28-V Wide Input Range
- Integrated 150-mΩ and 70-mΩ MOSFETs for 1.5‑A, Continuous Output Current
- Low, 2-µA Shutdown Current
- Fixed 600-kHz Frequency
- Peak Current Mode With Internal Compensation
- 200-mV and 100-mV Sense Voltage During Analog and PWM Dimming Modes
- Precision Analog Dimming (ADIM) by PWM Input
- LED-Open and -Short Protection
- Sense-Resistor-Open and -Short Protection
- Shutdown-and-Latch Mode Protection (TPS54200)
- Auto-Retry Mode Protection (TPS54201)
- Thermal Shutdown
- 6-Pin SOT-23-THIN Package
The TPS54200 and TPS54201 devices are 1.5-A synchronous buck mono-color or IR drivers with 28-V maximum input voltage. Current-mode operation provides fast transient response and eases loop stabilization.
The TPS54200 and TPS54201 can be used to drive single-string or multi-string mono-color or Infrared (IR) LED arrays as in the case of night vision cameras.
By integrating the MOSFETs and employing the SOT-23-THIN package, the TPS54200 and TPS54201 devices provide high power density and only require a small footprint on the PCB.
The TPS54200 and TPS54201 devices implement analog dimming by changing the internal reference voltage proportional to the duty cycle of the PWM signal input in analog dimming mode. This devices also support PWM dimming mode, in which the internal reference voltage is halved to 100 mV for higher efficiency.
Cycle-by-cycle current limit in the high-side MOSFET protects the converter in an overload condition and is enhanced by a low-side MOSFET freewheeling current limit which prevents current runaway. There is a low-side MOSFET sinking current limit to prevent excessive reverse current. For safety and protection, the TPS54200 and TPS54201 devices include LED-open and -short protection, sense-resistor-open and -short protection, and device thermal protection. The TPS54200 device implements shutdown-and-latch mode protection, whereas the TPS54201 device adopts auto-retry mode protection.
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 | TPS54200, TPS54201 4.5-V to 28-V Input Voltage, 1.5-A Output Current, Synchronous Buck Mono-Color or IR LED Driver datasheet (Rev. B) | PDF | HTML | 2018/6/20 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 技術文章 | A simple and efficient LED driver for video surveillance cameras | PDF | HTML | 2017/6/5 | |||
| 應用說明 | Power and Dimming LED with TPS54200 and TPS54201 | 2017/4/25 |
設計與開發
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TPS54200EVM-818 — TPS54200 同步降壓 WLED 驅動器評估模組
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23-THN (DDC) | 6 | 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。