A8732 Overview
The Allegro® A8732 is a Xenon photoflash charger IC designed to meet the needs of ultra low power, small form factor cameras, particularly camera phones. By using primary-side voltage sensing, the need for a secondary-side resistive voltage divider is eliminated. This has the additional benefit of reducing leakage currents on the secondary side of the transformer.
A8732 Key Features
- Ultra small 2 × 2 DFN/MLP-8 package
- Low quiescent current draw (0.5 μA max. in shutdown mode)
- Primary-side output voltage sensing; no resistor divider required
- Adjustable switch peak current limit up to 1.5 A with single-wire programming through the CHARGE pin
- 1V logic (VHI(min)) patibility
- Integrated IGBT driver with internal gate resistors
- Optimized for mobile phone, 1-cell Li+ battery
A8732 Applications
- Zero-voltage switching for lower loss