Overview
The NCP1399APDR2G, produced by onsemi, is a high-performance current mode controller designed for half-bridge resonant converters. This controller is optimized for high-frequency operation, ranging from 20 kHz to 750 kHz, and features a robust set of protection mechanisms and control schemes to ensure reliable and efficient operation.
Key aspects of the NCP1399APDR2G include its high-voltage startup current source, dynamic self-supply (DSS) operation, and advanced protection features such as over-voltage (OVP), over-temperature (OTP), and secondary short circuit protection. The controller also supports various operation modes, including skip mode and off-mode, to enhance efficiency under different load conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Frequency | 20 kHz to 750 kHz | Hz |
| Gate Voltage | Up to 600 V | V |
| VCC Supply Voltage | Up to 20 V | V |
| Package Type | SOIC-16 | - |
| Mounting Type | SMD | - |
| Temperature Range | -40°C to +125°C | °C |
| Startup Current Levels | I_start1 and I_start2 | - |
Key Features
- High-Frequency Operation: Supports frequencies from 20 kHz to 750 kHz.
- Current Mode Control Scheme: Ensures best transient response and inherent cycle-by-cycle over-current protection.
- High-Voltage Startup Current Source: Enables fast startup and extremely low standby power consumption.
- Over-Voltage and Over-Temperature Protection: Implemented via a dedicated OVP/OTP pin with latched or auto-recovery options.
- Skip and Off-Mode Operation: Ultra-low power consumption modes for improved efficiency under light load conditions.
- Secondary Short Circuit Protection: Dedicated protection system to limit stress on power stage components.
- PFC Stage Operation Control: Allows disabling or enabling PFC stage operation based on application state.
- Digital Processing and Noise Immunity: 10 ns minimum on-time resolution for high noise immunity.
Applications
- Adapters and Offline Battery Chargers: Suitable for high-efficiency power conversion in adapter applications.
- Flat Panel Display Power Converters: Ideal for powering flat panel displays with high reliability and efficiency.
- Computing Power Supplies: Used in computing power supplies to ensure stable and efficient power delivery.
- Industrial and Medical Power Sources: Applicable in industrial and medical power supplies where reliability and safety are critical.
Q & A
- What is the operating frequency range of the NCP1399APDR2G?
The operating frequency range is from 20 kHz to 750 kHz.
- What is the maximum gate voltage supported by the NCP1399APDR2G?
The controller supports gate voltages up to 600 V.
- What types of protection mechanisms are implemented in the NCP1399APDR2G?
The controller includes over-voltage (OVP), over-temperature (OTP), secondary short circuit protection, and other safety features.
- How does the NCP1399APDR2G manage startup and standby power consumption?
The controller features a high-voltage startup current source that enables fast startup and extremely low standby power consumption.
- What are the skip and off-mode operations in the NCP1399APDR2G?
These are ultra-low power consumption modes that enhance efficiency under light load conditions.
- How does the NCP1399APDR2G control PFC stage operation?
The controller allows disabling or enabling PFC stage operation based on the application's operating state via the PFC MODE pin.
- What is the role of the OVP/OTP pin in the NCP1399APDR2G?
The OVP/OTP pin implements over-voltage and over-temperature protection with latched or auto-recovery options.
- How does the NCP1399APDR2G handle secondary short circuit protection?
The controller has a dedicated protection system that shuts down the controller quickly to limit stress on power stage components.
- What is the significance of the LLC FB and LLC CS pins in the NCP1399APDR2G?
The LLC FB pin defines the operating frequency based on load conditions, and the LLC CS pin senses the resonant capacitor voltage for on-time modulation and protection.
- What are the typical applications of the NCP1399APDR2G?
The controller is suitable for adapters, offline battery chargers, flat panel display power converters, computing power supplies, and industrial and medical power sources.
