DESCRIPTION

The IC is developed and optimized for automotive applications where it can generate different output voltages as a flyback converter. The input voltage may be higher or lower than the output voltage. The multi-loop-regulation concept ensures fast response to variation of input voltage and load. The reset circuit generates a reliable reset signal until the output is in tolerance and the integrated, programmable windowed watchdog guarantees a minimum and maximum software reset time. An additional systemenable output enables critical components after the controller has served the watchdog three times to guarantee a save controller wake up sequence. This successful wake up also enables the ‘HOLD’-capability so that the controller can keep the converter running without ‘ON’ and ‘K15D’ active.

FEATURES

► Flyback converter with wide input range of 3V to 55V

► 5V first output voltage

► Additional output voltages possible with additional windings on transformer

► Softstart capability

► ON control-input with wide input voltage range

► Precise, programmable windowed watchdog

► Low standby current (50µA typical)

► Open load stable

► Snapback output current after short circuit on load

► K15D control-input

► Self-oscillating, multi-loop-regulation

► Non dissipating primary current simulation

► Degausing input and variable delayed switch on

► Push/pull driver for logic level Power-MOSFET

► No current shunt needed

► – 40°C to + 125 ºC operating temperature

► Additional system-enable output for critical modules

► SO 20w package

APPLICATION

► Automotive electronics

► Controller and sensor supply