NRND = Not Recommended for New Design
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The AP3606 and AP3607 are step-up DC-DC converters based on 1x/1.5x charge pump and low dropout current sink, which helps them maintain the highest efficiency. The AP3606 is specially designed to drive up to 4 W°Cs in backlight display while the AP3607 is designed for 6 W°Cs. These devices provide up to 20mA current for each W°C. There are totally 16 steps of current control, which is achieved through a digital pulse dimming function on EN pin. Additionally, 1MHz high switching frequency enables the use of small external capacitors. Internal soft-start circuitry prevents excessive inrush current during start-up and mode transition. The supply voltage ranges of AP3606 and AP3607 are from 2.7V to 5.5V which make them ideally suit for applications powered by Li-ion battery. These ICs are available in the tiny package of QFN-3Ω3-16.
| Dimming | Digital PWM |
|---|---|
| Efficiency (%) | 89 |
| Function | Charge Pump LED Driver |
| MaximumInput Voltage (V) | 5.5 |
| Maximum Output Current per Channel | 20 |
| Maximum Output Voltage (V) | 5.5 |
| MinimumInput Voltage (V) | 2.7 |
| Number of Regulated Output Channels | 4 |
| OperatingTemperatureRange (°C) | -40 to 85 |
| OVP | Yes |
| Quiescent Current (µA) | 1.7 |
| Soft Start | Yes |
| Standby Quiescent Current (µA) | 3 |
| SW RDS(ON) | N/A |
| Switching Frequency (MHz) | 1 |
| Typical Over-Current Protection Current | N/A |
| VFB | N/A |
