Overview
The NCP11187A065PG is an integrated power switcher from onsemi, designed for offline switch-mode power supplies (SMPS). This component integrates a peak current mode PWM controller and a robust 800V Silicon Junction (SJ) MOSFET, utilizing onsemi's mWSaver technology. This technology reduces switching frequency and operating current at light-load conditions, helping to avoid acoustic noise issues and meet international power conservation standards such as Energy Star®. The device also features a high-voltage startup circuit, frequency-hopping function, slope compensation, and various protection mechanisms, making it ideal for cost-effective and compact power supply designs.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC Supply Voltage | VCC | -0.3 | 30 | V | |
| Drain-to-Source Breakdown Voltage | BVDSS | 800 | V | ||
| Static Drain-to-Source On Resistance | RDS(ON) | 0.70 | 1.74 | Ω | |
| Switching Frequency | fOSC | 65 kHz | kHz | ||
| Junction Temperature | TJ | -40 | 150 | °C | |
| Power Dissipation | PD | 1.25 | W | ||
| Pulsed Drain Current | IDM | 6.8 | A |
Key Features
- mWSaver Technology: Reduces switching frequency and operating current at light-load conditions to avoid acoustic noise and meet power conservation standards.
- High-Voltage Startup Circuit: Enables fast startup and minimizes inrush current and output voltage overshoot during soft-start.
- Frequency-Hopping Function: Helps in reducing EMI.
- Slope Compensation: Ensures stable operation in continuous conduction mode.
- Constant Output Power Limit: Controlled by sensed line input voltage.
- Various Protections: Includes brown-out protection, line over-voltage protection (OVP), feedback open-loop protection (OLP), abnormal over-current protection (AOCP), current sensing short protection (CSSP), and thermal shutdown (TSD).
- Auto-Restart Mode: For protections like OLP and VCC under-voltage lockout.
Applications
- Industrial Auxiliary Power Supplies: Suitable for various industrial power supply needs.
- E-metering SMPS: Used in smart metering applications.
- Power Supplies for White Goods and Consumer Electronics: Ideal for home appliances and consumer electronic devices.
Q & A
- What is the primary function of the NCP11187A065PG?
The NCP11187A065PG is an integrated power switcher designed for offline switch-mode power supplies (SMPS), integrating a PWM controller and an 800V SJ MOSFET.
- What is mWSaver technology, and what are its benefits?
mWSaver technology reduces switching frequency and operating current at light-load conditions, helping to avoid acoustic noise and meet international power conservation standards.
- What are the key protection mechanisms included in the NCP11187A065PG?
The device includes brown-out protection, line OVP, feedback OLP, AOCP, CSSP, and thermal shutdown.
- What is the significance of the high-voltage startup circuit in the NCP11187A065PG?
The high-voltage startup circuit enables fast startup, minimizes inrush current, and reduces output voltage overshoot during soft-start.
- What are the typical applications of the NCP11187A065PG?
It is used in industrial auxiliary power supplies, e-metering SMPS, and power supplies for white goods and consumer electronics.
- What is the maximum drain-to-source breakdown voltage of the NCP11187A065PG?
The maximum drain-to-source breakdown voltage is 800V.
- What is the operating temperature range of the NCP11187A065PG?
The operating temperature range is from -40°C to 150°C.
- How does the auto-restart mode function in the NCP11187A065PG?
The auto-restart mode is triggered for protections like OLP and VCC under-voltage lockout, allowing the device to restart once the input voltage is reconnected.
- What is the significance of the frequency-hopping function in the NCP11187A065PG?
The frequency-hopping function helps in reducing electromagnetic interference (EMI).
- What is the typical switching frequency of the NCP11187A065PG?
The typical switching frequency is 65 kHz.
