NXP Semiconductors SSL3252
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.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 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 A
● Small WLCSP12 package with 500 m bump pitch NXP Semiconductors SSL3252 Photo flash LED driver 3.