LED DRVR 2Segment 3.3V/5V 12-Pin WLCSP T/R

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.

• 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 signals for stand-alone operation
• Forward voltage sensing to allow single/dual LED detection
• Soft start/soft stop
• Integrated protection circuits for enhanced system reliability:
  • Internal time-out
  • OverTemperature Protection (OTP)
  • UnderVoltage LockOut (UVLO)
  • OverVoltage Protection (OVP)
  • Short-circuit protection
• Inductor peak current limit and broken coil detection
• Low device shut-down current of less than 1 µA
• Small WLCSP12 package with 500 µm bump pitch