LM3699 是一款三灯串,高效、由 PWM 控制的电源,用于智能手机的显示背光或键区 LED。 具有集成 1A,40V MOSFET 的高压电感升压转换器为三个串联 LED 灯串供电。 升压输出自动调节到 LED 正向电压,以最大限度地减少净空电压并有效地改进 LED 效率。
ILOW 端子提供一个在照相机闪光灯运行时快速减少 LED 亮度的方法。
LM3699 具有集成过压、过流和过热保护。
此器件在 2.7V 至 5.5V 的输入电压范围和 -40°C 至 85°C 的温度范围内运行。
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| Number of channels | 3 |
| Vin (min) (V) | 2.7 |
| Vin (max) (V) | 5.5 |
| Vout (min) (V) | 0 |
| Vout (max) (V) | 24 |
| Type | Inductive |
| Switching frequency (max) (kHz) | 1120 |
| Duty cycle (max) (%) | 94 |
| LED current per channel (mA) | 20.2 |
| Peak efficiency (%) | 90 |
| Topology | Boost |
| Features | CABC, Direct PWM Dimming, Enable/Shutdown, Integrated Switch, OVP, PWM control, Synchronous Rectification, Thermal shutdown |
| Operating temperature range (°C) | -40 to 125 |
| Rating | Catalog |
| DSBGA (YFQ) | 12 | 2.52000000000000018 mm² 1.8 x 1.4000000000000001 |