Overview
The NCP1076P100G is a high-voltage switcher integrated circuit (IC) from onsemi, designed for low-power offline Switch-Mode Power Supplies (SMPS). This IC combines a fixed frequency current-mode controller with a 700 V MOSFET, offering a high level of integration and advanced protection features. It is available in PDIP-7 or SOT-223 packages, making it suitable for a variety of applications requiring efficient and reliable power management.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Switching Frequency | 100 | kHz |
| RDS(on) | 4.7 | Ω |
| Peak Current (Ipeak) | 650 | mA |
| Maximum Output Power (230 Vac, 50°C) | 25 | W |
| Maximum Output Power (85-265 Vac, 50°C) | 15 | W |
| VCC(on) | 7.8 | V |
| VCC(off) | 6.1 | V |
| BVDSS | 700 | V |
| Internal IC Consumption (ICC1) | 0.7 - 1.3 | mA |
| Soft-Start Duration (TSS) | 1 | ms |
Key Features
- Built-in 700 V MOSFET with low RDS(on) of 4.7 Ω
- Current-mode fixed frequency operation at 100 kHz
- Peak current set point adjustable via feedback signal input
- Soft-start, frequency-jittering, and skip-cycle modes for efficient operation
- Dynamic Self-Supply (DSS) eliminating the need for an auxiliary winding
- Protection features include overvoltage protection, short-circuit protection, and thermal shutdown
- Large creepage distance between high-voltage pins for enhanced safety
- Ramp compensation and leading edge blanking for stable operation
Applications
The NCP1076P100G is suitable for various low-power offline SMPS applications, including:
- Power adapters and chargers
- Set-top boxes and other consumer electronics
- Industrial power supplies
- LED drivers and lighting systems
- Small appliances and white goods
Q & A
- What is the switching frequency of the NCP1076P100G?
The switching frequency of the NCP1076P100G is 100 kHz.
- What is the RDS(on) of the MOSFET in the NCP1076P100G?
The RDS(on) of the MOSFET in the NCP1076P100G is 4.7 Ω.
- What is the peak current limit of the NCP1076P100G?
The peak current limit of the NCP1076P100G is 650 mA.
- What are the key protection features of the NCP1076P100G?
The key protection features include overvoltage protection, short-circuit protection, thermal shutdown, and AC input line voltage detection.
- How does the Dynamic Self-Supply (DSS) feature work?
The DSS feature eliminates the need for an auxiliary winding by self-supplying the IC, reducing input power consumption.
- What is the purpose of the soft-start and skip-cycle modes?
The soft-start mode ensures a gradual increase in output power during startup, while the skip-cycle mode reduces standby consumption by skipping switching cycles at light loads.
- What is the maximum output power of the NCP1076P100G at 230 Vac and 50°C?
The maximum output power of the NCP1076P100G at 230 Vac and 50°C is 25 W.
- What is the VCC(on) voltage for the NCP1076P100G?
The VCC(on) voltage for the NCP1076P100G is 7.8 V.
- What is the BVDSS of the MOSFET in the NCP1076P100G?
The BVDSS of the MOSFET in the NCP1076P100G is 700 V.
- What are some typical applications of the NCP1076P100G?
Typical applications include power adapters, set-top boxes, industrial power supplies, LED drivers, and small appliances.
