Overview
The NCP1075P100G is a high-voltage switcher integrated circuit (IC) designed by onsemi for use in low-power offline Switch-Mode Power Supplies (SMPS). This IC is part of the NCP107x family, which integrates a fixed frequency current mode controller with a 700 V MOSFET. It is available in PDIP-7 or SOT-223 packages, offering a high level of integration and various protection features. The NCP1075P100G is known for its efficiency, especially at light loads, and its quiet operation due to frequency foldback and skip modes.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Switching Frequency | 100 | kHz |
| RDS(on) | 11 | Ω |
| Peak Current | 450 | mA |
| Maximum Output Power (230 Vac) | 19 | W |
| Maximum Output Power (85-265 Vac) | 10 | W |
| Power Switch Circuit Breakdown Voltage | 700 | V |
| Soft-Start Duration | 1 | ms |
| Leading Edge Blanking Duration | 200 | ns |
| Propagation Delay | 100 | ns |
| Maximum Duty Cycle | 65 | % |
Key Features
- Built-in 700 V MOSFET: With an RDS(on) of 11 Ω, providing high efficiency and reliability.
- 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 Overvoltage Protection: Includes auto-recovery and AC input line voltage detection for enhanced safety.
- Dynamic Self-Supply: Eliminates the need for an auxiliary winding, simplifying the circuit design.
- Frequency Foldback and Skip Mode: Optimizes efficiency at light loads by reducing switching frequency and entering skip mode when power demand is low.
- Large Creepage Distance Between High-Voltage Pins: Enhances safety and reliability in high-voltage applications.
Applications
The NCP1075P100G is suitable for a variety of low-power offline SMPS applications, including:
- Power adapters for consumer electronics.
- Standby power supplies in TVs and other household appliances.
- Low-power industrial power supplies.
- LED drivers and lighting systems.
Q & A
- What is the switching frequency of the NCP1075P100G?
The switching frequency of the NCP1075P100G is 100 kHz.
- What is the RDS(on) of the MOSFET in the NCP1075P100G?
The RDS(on) of the MOSFET in the NCP1075P100G is 11 Ω.
- What is the peak current limit of the NCP1075P100G?
The peak current limit of the NCP1075P100G is 450 mA.
- Does the NCP1075P100G have built-in overvoltage protection?
Yes, the NCP1075P100G includes overvoltage protection with auto-recovery.
- How does the NCP1075P100G optimize efficiency at light loads?
The NCP1075P100G optimizes efficiency at light loads through frequency foldback and skip modes.
- What is the maximum output power of the NCP1075P100G at 230 Vac?
The maximum output power of the NCP1075P100G at 230 Vac is 19 W.
- What is the soft-start duration of the NCP1075P100G?
The soft-start duration of the NCP1075P100G is 1 ms.
- Does the NCP1075P100G have short-circuit protection?
Yes, the NCP1075P100G includes short-circuit protection.
- What is the maximum duty cycle of the NCP1075P100G?
The maximum duty cycle of the NCP1075P100G is 65%.
- What are the typical applications of the NCP1075P100G?
The NCP1075P100G is typically used in power adapters, standby power supplies, low-power industrial power supplies, and LED drivers.
