NRND = Not Recommended for New Design
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The AP3605 is a step-up DC/DC converter based on 1.5x charge pump current source, it is specially designed for °C supplies in backlight display. The AP3605 can provide constant current up to 20mA for each °C, which is programmed by an external resistor, so it has a total capability to provide 80mA for 4 °Cs. The chip has a good performance of °C current matching and allows PWM brightness dimming control. Additionally, high switching frequency up to 1MHz enables the use of two small external flying capacitors. Internal soft-start circuitry prevents excessive inrush current during start-up. The AP3605 supply voltage range is from 2.7V to 5.5V, ideally suited for applications powered by the Liion battery. The AP3605 is available in a 3mmx3mm QFN-3x3-16 tiny package. Its operating temperature range is -40oC to 85oC.
· Mobile Phone · MP3, MP4 · White LED Backlight in Mobile Phone, PDA
Dimming |
PWM |
|---|---|
Efficiency (%) |
93 |
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 |
No |
Quiescent Current (µA) |
1.5 |
Soft Start |
No |
Standby Quiescent Current (µA) |
0.1 |
SW RDS(ON) |
N/A |
Switching Frequency (MHz) |
1 |
Typical Overcurrent Protection Current |
N/A |
VFB |
N/A |
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A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.
| PCN # | Issue Date | Implementation Date | Subject |
|---|---|---|---|
| PCN-2770 | 2025-10-30 | 2025-10-30 | Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products |
