SSL3252

SSL3252 Photo flash LED driver Rev. 1 — 7 July 2011 Product data sheet 1. General description The SSL3252 is a photo flash LED driver designed for battery operated mobile devices such as mobile phones and PDAs. The boost converter delivers high performance and drives a single or dual high brightness LED at up to 500 mA with over 85 % efficiency. The driver can be programmed to operate in Flash mode, Torch mode, Assist light mode, or Indicator mode. The small silicon size and the high internal switching frequency of 2 MHz minimize the size of the application and make the SSL3252 very suitable for mobile phones where space is limited, and only requiring three external components. System protection has been a very important part of the SSL3252 design, so a time-out function can be programmed to prevent overstressing the LED, and the driver itself is protected from overheating. 2. Features and benefits  High power single or dual LED output driving up to 500 mA flash current  Separate indicator LED output of 2.5 mA to 10 mA  High side current source for main and indicator LEDs  Output voltage of up to 8.85 V  Wide input voltage ranging from 2.5 V to 5.5 V  High efficiency of over 85 % at optimum output current  Switching frequency of 2 MHz  Flash mode, Assist light mode, Torch mode and Indicator mode are supported  Internally timed flash operation up to 850 ms  I2C-bus, programmable up to 400 kHz  Strobe signal to avoid I2C latency for the flash  Direct enable signal...