The NCP1395A/B offers everything needed to build a reliable and rugged resonant mode power supply. Its unique architecture includes a 1 MHz Voltage Controller Oscillator whose control mode brings flexibility when an ORing function is a necessity, e.g. in multiple feedback paths implementations. Protections featuring various reaction times, e.g. immediate shutdown or timer-based event, brown-out, broken opto-coupler detection etc., contribute to a safer converter design, without engendering additional circuitry complexity. An adjustable deadtime also helps lowering the shoot-through current contribution as the switching frequency increases.Finally, an on-board operational transconductance amplifier allows for various configurations, including constant output current working mode or traditional voltage regulation.
Features
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High Frequency Operation from 50 kHz up to 1.0 MHz
Selectable Minimum Switching Frequency with ±3% Accuracy
Timer-Based Input with Auto-Recovery Operation for Delayed Event Reaction
Adjustable Deadtime from 150 ns to 1.0 µs
Startup Sequence via an Adjustable Soft--Start
Brown-Out Protection for a Simpler PFC Association
Latched Input for Severe Fault Conditions, e.g. Overtemperature or OVP
Enable Input for Immediate Event reaction or Simple ON/OFF Control
Operational Transconductance Amplifier (OTA) for Multiple Feedback Loops
