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Datasheets:
A8530: Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver (PDF)
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Power Management ICs,
Power Management ICs: Display Power and Backlight,
Power Management ICs: Switching Regulators
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A8530: Allegro Microsystems, Inc. Introduces High-Efficiency Charge Pump White Led Driver for Display Backlight and Flash/Torch
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A8530
Ultracompact 6-Channel Backlight and Flash/Torch Driver
Features
- Proprietary adaptive control scheme (1×, 1.5×, 2×)
- 0.5% typical LED current matching
- 2 separate serial interfaces for dimming control
- Drives up to 6 white LEDs (4 display backlight, 2 flash/torch)
- 30 mA per LED channel for display backlight
- 100 mA per LED channel for flash/torch backlight
- 320 mA total output current capability
- Low EMI design and soft-start function
- Short circuit, overvoltage, thermal shutdown protection
- 0.75 mm very thin profile, 3 mm × 3 mm package
Applications
- White LED backlights for cellular phones, PDAs
- Digital cameras, camcorders
- Other portable device white LED backlighting
- 320 mA WLED flash/torch
Description
The A8530 high efficiency charge pump ICs offer a simple, low-cost white LED driver solution for driving four display backlight and two flash/torch/video mode white LEDs. Using a proprietary control scheme (1×, 1.5×, and 2×), the A8530 can deliver well-matched LED current while maintaining the highest efficiency and low EMI. The LED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity.
LED brightness and on/off can be controlled for 4 display backlight LEDs and 2 flash/torch LEDs through 2 single-wire serial interface pins.
The A8530 is available in a very thin profile (0.75 mm nominal height) 3 × 3 mm QFN/MLP 16 pin package.
Typical Applications
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A8530EES-T | 16-lead QFN | Yes | view data | -40 °C to 85 °C | new |
Contact Local Sales Representative or check distributor stock |
|
| A8530EESTR-T | 16-lead QFN | Yes | view data | -40 °C to 85 °C |
Contact Local Sales Representative or check distributor stock |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.