LM3632A 器件集成了用于 LCD 面板背光照明和摄像机闪光灯的白光发光二极管 (WLED) 驱动器以及用于 LCD 面板的偏置电源。 该器件具备 LED 驱动器所需的全套安全功能,并且效率高达 90%,正/负偏置电源轨精度高达 1.5%。 该器件最多能够驱动 16 个背光 LED,是中小型显示屏的理想选择。 该器件可使用由同步升压转换器供电的 1.5A 恒流 LED 驱动器来驱动闪光灯。 高侧闪光灯电流源支持 LED 阴极接地操作。
LM3632A 兼具高集成度和可编程性,无需修改硬件即可适应各类应用。
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| Number of channels | 2 |
| Vin (min) (V) | 2.7 |
| Vin (max) (V) | 5.5 |
| Vout (min) (V) | 0 |
| Vout (max) (V) | 29.5 |
| Type | Inductive |
| Switching frequency (max) (kHz) | 1100 |
| Duty cycle (max) (%) | 94 |
| LED current per channel (mA) | 25 |
| Peak efficiency (%) | 92 |
| Topology | Boost, Current Sink, Multi-Channel |
| Features | Adjustable Switch Frequency, CABC, Direct PWM Dimming, Enable/Shutdown, I2C control, Integrated Switch, OVP, PWM control, Soft Start |
| Operating temperature range (°C) | -40 to 85 |
| Rating | Catalog |
| DSBGA (YFF) | 30 | 5.71999999999999912 mm² 2.2 x 2.5999999999999996 |