IW1690-08

IW1690 IW1690-08 --  Low-Power Off-line Digital PWM Controller

Features

• Primary-side feedback eliminates opto-isolators and simplifies design

• Direct drive of BJT switching device

• Multi-mode operation for highest overall efficiency

• Built-in cable drop compensation

• Very tight output voltage regulation

• No external compensation components required

• Complies with CEC/EPA no load power consumption and average efficiency regulations

• Built-in output constant-current control with primary-side feedback

• Low start-up current (10 µA typical)

• Built-in soft start

• Built-in short circuit protection and output overvoltage protection

• Optional AC line under/overvoltage protection

• Fixed switching frequency: 45 kHz, 65 kHz or 75 kHz

• Dynamic base current control

• PFM operation at light load

• Built-in current sense resistor short protection

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