iW3677

Power Factor Correction Flyback Controller for Front-End Power Conversion in Commercial SSL Lighting

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High PF, < 10% THD at Full Load and IEC61000-3-2 Compliant, Integrated Startup Device

The iW3677 front-end flyback power factor correction device provides high power factor (PF > 0.9) and low THD (< 20%) down to 33% load current using Dialog’sPF-Boost™technology. The device can be configured in both isolated and non-isolated configurations, as a buck, buck-boost or flyback converter and consumes less than 150mW no-load standby power at 230V_AC. The iW3677 integrates a high-voltage startup device which also reduces standby power consumption during normal operation.

The iW3677 integrates a full range of protection features including output over-voltage, over-power, input over-voltage and under-voltage, over-current and sense resistor short circuit protection, open loop and over temperature protection.

For option without integrated high-voltage startup, seeiW3671.

Features

90W Off-Line Controller Supports Isolated and Non-isolated Flyback, Buck and Buck-Boost
Integrated High-Voltage Startup Device
PF > 0.9 and THD < 20% Across Input Voltage at Output Power > 33%
- THD < 10% at Full Load, Across the Input Voltage Range
Supports Wide AC Input Voltage – 90V_ACto 305V_ACwith Tight AC Load and Line Regulation (±3%)
Fast PFC Ready Time < 0.2s
Standby Power - <150mW at Input Voltage of 230V_AC
Fully Protected
- Output Over-Voltage, Over-Power, Over-Current, Sense-Resistor Short Protections
- Input Voltage Under-Voltage and Over-Voltage Protection
- Built-In Over-Temperature Protection
- Open Loop Protection