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