Overview
The NCP1399AGDR2G is a high-performance current mode controller designed for half-bridge resonant converters, manufactured by onsemi. 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 efficient and safe operation.
It includes a high-voltage startup current source, which enables fast startup times and extremely low standby power consumption. The controller also implements an ultra-low power consumption mode known as off-mode, which significantly reduces no-load input power consumption.
Key Specifications
| Parameter | Unit | Typical | Minimum | Maximum |
|---|---|---|---|---|
| Operating Frequency | kHz | 20 - 750 | 20 | 750 |
| VCC Turn-on Threshold | V | 10 - 16.3 | 10 | 16.3 |
| VCC Minimum Operating Voltage | V | 9.0 - 10 | 9.0 | 10 |
| VCC Reset Threshold | V | 5.8 - 7.2 | 5.8 | 7.2 |
| Startup Current (I_START1) | mA | 6 - 13 | 6 | 13 |
| Off-state Leakage Current (I_START_OFF) | mA | 0.01 | 0.01 | 0.01 |
| Output Voltage Rise Time (tr) | ns | 20 - 80 | 20 | 80 |
| Output Voltage Fall Time (tf) | ns | 20 - 80 | 20 | 80 |
Key Features
- High-Frequency Operation: Supports frequencies from 20 kHz to 750 kHz.
- Current Mode Control Scheme: Ensures best transient response performance and provides inherent cycle-by-cycle over-current protection.
- Ultra-Low Power Consumption Mode (Off-Mode): Significantly reduces no-load input power consumption.
- High-Voltage Startup Current Source: Enables fast startup times and extremely low standby power consumption.
- Over-Temperature and Over-Voltage Protection: Protects the IC from damage due to temperature or voltage anomalies.
- Active ON and Active OFF Off-Mode Control: Different control techniques for managing off-mode operation.
- PFC Stage Operation Control: Allows disabling or enabling the PFC stage based on the application's operating state.
- Quiet Skip Operation Mode: Minimizes transformer acoustic noise during light load conditions.
- Dedicated Overload Protection System: Ensures application safety during overload and secondary short circuit events.
Applications
- Adapters and Offline Battery Chargers: Suitable for high-efficiency charging applications.
- Flat Panel Display Power Converters: Ideal for powering display devices with high efficiency and reliability.
- Computing Power Supplies: Used in power supplies for computers and other computing devices.
- Industrial and Medical Power Sources: Reliable and efficient power solutions for industrial and medical equipment.
Q & A
- What is the operating frequency range of the NCP1399AGDR2G?
The NCP1399AGDR2G operates within a frequency range of 20 kHz to 750 kHz.
- What is the purpose of the high-voltage startup current source in the NCP1399AGDR2G?
The high-voltage startup current source enables fast startup times and extremely low standby power consumption.
- How does the NCP1399AGDR2G manage off-mode operation?
The NCP1399AGDR2G uses two different off-mode control techniques: Active ON and Active OFF off-mode control.
- What protection mechanisms are built into the NCP1399AGDR2G?
The controller includes over-temperature, over-voltage, overload, and secondary short circuit protections.
- Can the PFC stage operation be controlled in the NCP1399AGDR2G?
Yes, the PFC stage operation can be disabled or enabled based on the application's operating state using the PFC MODE pin.
- What is the typical VCC turn-on threshold for the NCP1399AGDR2G?
The typical VCC turn-on threshold ranges from 10 V to 16.3 V.
- How does the quiet skip operation mode benefit the application?
The quiet skip operation mode minimizes transformer acoustic noise during light load conditions.
- What is the minimum operating voltage after turn-on for the NCP1399AGDR2G?
The minimum operating voltage after turn-on is between 9.0 V and 10 V.
- Is the NCP1399AGDR2G suitable for industrial applications?
Yes, the NCP1399AGDR2G is suitable for industrial power sources due to its high efficiency and reliability.
- What is the purpose of the LLC FB pin in the NCP1399AGDR2G?
The LLC FB pin defines the operating frequency based on given load conditions and activates skip mode operation under light load conditions.
