Allegro MicroSystems A8435
The A8435 high efficiency charge pump IC offers a simple, low-cost white LED driver solution for portable electronics display applications. The A8435 accepts an input range of 2.7 to 5.5 V and delivers up to 30 mA for each of the four regulated current sources. The A8435 can deliver a total continuous output current of 120 mA, meeting the requirements of most Li-ion battery-powered white LED backlight applications.| Part No. | A8435 |
|---|---|
| Datasheet | A8435 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | High Efficiency Charge Pump White LED Driver |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● Proprietary adaptive control scheme (1×, 1.5×)● Maximum efficiency, over 92%
● 0.5% LED current matching
● 1 MHz operating frequency
● Flexible dimming control: ▫ Serial 11-level dimming, down to 5% ▫ PWM ▫ 2-bit parallel
● Drives up to 4 white LEDs
● 30 mA per LED
● 120 mA total continuous output
● Low input ripple and EMI
● Soft-start limits inrush current
● Short circuit protection
● Overvoltage protection
● Thermal shutdown protection
● Space-saving MLP-16 package: 3 × 3 mm footprint
● Very thin 0.75 mm nominal height package Package: 16 pin QFN/MLP (suffix ES) Approximate Scale
DESCRIPTION
Using a proprietary control scheme (1×, 1.5×), the A8435 can output well-matched currents for up to 4 LEDs, while maintaining the highest efficiency over most of the Li-ion battery lifetime. Outputs can also be tied together for WLED flash/torch applications. The A8435 offers flexible options for LED current driving. The LED current can be set by any of the following met...
