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Features

? 650V Avalanche Rugged CoolMOS? with built in

switchable Startup Cell

? Active Burst Mode for lowest Standby Power

@ light load controlled by Feedback Signal

? Fast Load Jump Response in Active Burst Mode

? 67 kHz fixed Switching Frequency

? Auto Restart Mode for Over temperature

Detection

? Auto Restart Mode for Overvoltage Detection

? Auto Restart Mode for Overload and Open Loop

? Auto Restart Mode for VCC Undervoltage

? User defined Soft Start

? Minimum of external Components required

? Max Duty Cycle 75

? Overall Tolerance of Current Limiting < ±5

? Internal Leading Edge Blanking

? BiCMOS technology provides wide VCC Range

? Frequency Jittering for Low EMI

Description

The CoolSET?-F3(Jitter version) meets the requirements

for Off-Line Battery Adapters and low cost SMPS for the

lower power range. By use of a BiCMOS technology a wide

VCC range up to 26V is provided. This covers the changes

in the auxiliary supply voltage if a CV/CC regulation is

implemented on the secondary side. Furthermore an Active

Burst Mode is integrated to fullfill the lowest Standby Power

Requirements <100mW at no load and Vin = 270VAC. As

during Active Burst Mode the controller is always active

there is an immediate response on load jumps possible

without any black out in the SMPS. In Active Burst Mode

the ripple of the output voltage can be reduced <1.

Furthermore Auto Restart Mode is entered in case of

Overtemperature, VCC Overvoltage, Output Open loop or

Overload and VCC Undervoltage. By means of the internal

precise peak current limitation, the dimension of the

transformer and the secondary diode can be lowered which

leads to more cost efficiency.