A8437 Description
The Allegro® A8437 Xenon photoflash charger IC is designed to meet the needs of ultra-low power, small form factor cameras, particularly camera-phones. The charge current time is adjustable by setting the charge current limit from 0.4 to 1.2 A maximum. By using primaryside voltage sensing, the need for a secondary-side resistive voltage divider is eliminated.
A8437 Key Features
- Low quiescent current draw (0.1 μA in shutdown mode)
- Primary-side output voltage sensing; no resistor divider
- User-adjustable current limit from 0.4 to 1.2 A
- 1.1 V logic (VHI(min)) patibility
- Integrated IGBT driver with separate sink and source (CG
- Flash dual trigger with interlock for increased noise
- Optimized for mobile phone, 1-cell Li+ battery
A8437 Applications
- Low quiescent current draw (0.1 μA in shutdown mode)