Overview
The NCP1079ABP100G is a highly integrated off-line switcher IC from onsemi, designed for robust and highly efficient power supplies. This device combines a fixed frequency current mode controller with a 700 V MOSFET, offering a high level of integration and various protection features. It is particularly suited for applications requiring high efficiency and reliability, such as adapters, open-frame power supplies, and other universal mains-operated devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| RDS(ON) | 2.9 | Ω |
| Maximum Peak Current (IPK) | 1050 | mA |
| Switching Frequencies | 65, 100, 130 | kHz |
| Package Type | PDIP-7 (Pb-Free) | |
| Maximum Duty Cycle | 64-72 | % |
| Temperature Shutdown | 150 | °C |
| VCC Start Voltage | 8.0-8.9 | V |
| VCC Stop Voltage (UVLO) | 6.1-6.9 | V |
Key Features
- Built-in 700 V MOSFET: With a low RDS(ON) of 2.9 Ω, enhancing efficiency and reducing power losses.
- Current-Mode Fixed Frequency Operation: Available frequencies include 65 kHz, 100 kHz, and 130 kHz.
- Soft-Start and Frequency Jittering: Reduces electromagnetic interference (EMI) and ensures smooth startup.
- Short-Circuit Protection and Skip-Cycle Mode: Enhances reliability and reduces standby power consumption.
- Dynamic Self-Supply (DSS): Eliminates the need for an auxiliary winding, providing a self-sustaining power supply.
- Line Detection and Brown-Out Protection: Prevents operation at too low or too high AC input voltages.
- Over-Voltage Protection (OVP) and Over-Power Protection (OPP): Ensures safe operation by monitoring and adjusting to input voltage conditions.
- Leading Edge Blanking (LEB) and Auto-Recovery: Provides additional layers of current protection and automatic recovery from fault conditions.
Applications
The NCP1079ABP100G is suitable for a variety of power supply applications, including:
- Adapters and Chargers: Universal mains-operated adapters requiring high efficiency and reliability.
- Open-Frame Power Supplies: For applications needing compact, efficient, and protected power supply solutions.
- Industrial Power Supplies: Where robustness and high efficiency are critical.
- Consumer Electronics: Power supplies for consumer electronics that require low standby power consumption and high reliability.
Q & A
- What is the maximum peak current (IPK) of the NCP1079ABP100G?
The maximum peak current (IPK) is 1050 mA.
- What are the available switching frequencies for the NCP1079ABP100G?
The available switching frequencies are 65 kHz, 100 kHz, and 130 kHz.
- What is the RDS(ON) of the built-in MOSFET in the NCP1079ABP100G?
The RDS(ON) of the built-in MOSFET is 2.9 Ω.
- Does the NCP1079ABP100G have built-in protection features?
- How does the dynamic self-supply (DSS) feature work?
The DSS feature allows the device to operate without an auxiliary winding, providing a self-sustaining power supply.
- What is the purpose of the soft-start and frequency jittering features?
These features reduce electromagnetic interference (EMI) and ensure a smooth startup.
- What is the maximum duty cycle of the NCP1079ABP100G?
The maximum duty cycle is between 64% and 72%.
- How does the line detection feature work?
The line detection feature monitors the drain voltage to prevent operation at too low an AC input voltage.
- What is the temperature shutdown threshold for the NCP1079ABP100G?
The temperature shutdown threshold is 150°C.
- What package type is the NCP1079ABP100G available in?
The NCP1079ABP100G is available in a PDIP-7 (Pb-Free) package.
