方案
设计
DC-DC LED Drivers | CAT3604V
概览
CAT3604V 是一款高能效分数型电荷泵，最多可驱动四个 LED，输入电源电压低至 2.5V。 外部 RSET 电阻用于控制 LED 沟道亮度，沟道诊断包括了对于短路和开路 LED 沟道情况的自动检测，可确保 CAT3604V 在所有运行模式下保持在最高能效水平。 每个运行模式均使用恒定高频率开关方案，允许使用小型外部陶瓷电容器，同时提供最高 5.5 V 的卓越低噪声输入电源波纹性能。 EN 输入控制支持直接 PWM 调光，可应对超过 10kHz 的调光频率，因此提供极高分辨率亮度水平。 该器件采用 16 焊盘小巧的 0.8mm 薄款 QFN (4mm x 4mm)。
应用
- LCD Display Backlight
终端产品
- Mobile Phones
- Digital Still Cameras
特性
- Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
- Drives up to 4 LEDs at 30mA each
- Pin compatible with industry standard ‘604
- Open/short LED automatic detection
- Power efficiency up to 92%
- High resolution PWM dimming
- Low noise supply ripple in all modes
- Soft start and current limiting
- Short circuit and thermal overload protection
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CAT3604VHV4-GT2
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