onsemi NCP1399 is a high performance current mode controller for half bridge resonant converters. This controller implements 600 V gate drivers, simplifying layout and reducing external component count. The built-in brownout input function eases implementation of the controller in all applications. In applications where a PFC front stage is needed, the NCP1399 features a dedicated output to drive the PFC controller. This feature together with dedicated skip mode technique further improves light load efficiency of the whole application. The NCP1399 provides a suite of protection features allowing safe operation in any application. This includes overload protection, over-current protection to prevent hard switching cycles, brownout detection, open optocoupler detection, automatic dead time adjust, overvoltage (OVP) and overtemperature (OTP) protections.
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- High-frequency operation from 20 kHz up to 750 kHz
- Current mode control scheme
- Automatic dead-time with maximum dead-time clamp
- Dedicated startup sequence for fast resonant tank stabilization
- Skip mode operation for improved light load efficiency
- Off-mode operation for extremely low no-load consumption
- Latched or auto-recovery overload protection
- Latched or auto-recovery output short circuit protection
- Latched input for severe fault conditions, e.g. OVP or OTP
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- Out of resonance switching protection
- Open feedback loop protection
- Precise brown-out protection
- PFC stage operation control according to load conditions
- Startup current source with extremely low leakage current
- Pin to adjacent pin / open pin fail safe
- Dynamic Self-Supply (DSS) operation in off-mode or fault modes
- Pb-free device
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| Applications |
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- Adapters and offline battery chargers
- Flat panel display power converters
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- Computing power supplies
- Industrial and medical power sources
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