Overview
The NCP1015AP100G, produced by onsemi, is a self-supplied monolithic switcher designed for low standby-power offline Switch-Mode Power Supplies (SMPS). This integrated circuit combines a fixed-frequency current-mode controller with a 700 V voltage MOSFET, making it an ideal solution for building rugged and low-cost power supplies. The NCP1015AP100G is available in PDIP-7 and SOT-223 packages, offering features such as soft-start, frequency jittering, short-circuit protection, and skip-cycle operation to enhance efficiency and reduce acoustic noise.
Key Specifications
| Parameter | Typical Value | Min Value | Max Value | Unit |
|---|---|---|---|---|
| Voltage Rating (MOSFET) | 700 | - | - | V |
| RDS(on) | 11 Ω | - | - | Ω |
| Switching Frequency | 65-100 kHz | 65 kHz | 100 kHz | kHz |
| Peak Current Limit | 450 mA | - | - | mA |
| VCC(off) | 8.5 V | 7.9 V | 9.1 V | V |
| VCC(on) | 7.5 V | 6.9 V | 8.1 V | V |
| Internal IC Consumption (65 kHz) | 0.92 mA | - | 1.1 mA | mA |
| Internal IC Consumption (100 kHz) | 0.95 mA | - | 1.15 mA | mA |
Key Features
- Built-in 700 V MOSFET with typical RDS(on) of 11 Ω
- Large Creepage Distance between High-voltage Pins
- Current-mode Fixed Frequency Operation: 65 kHz - 100 kHz
- Skip-cycle Operation at Low Peak Currents Only: No Acoustic Noise!
- Dynamic Self-Supply, No Need for an Auxiliary Winding
- Internal 1 ms Soft-start
- Auto-recovery Internal Output Short-circuit Protection
- Frequency Jittering for Better EMI Signature
- Below 100 mW Standby Power if Auxiliary Winding is Used
- Internal Temperature Shutdown
- Direct Optocoupler Connection
- SPICE Models Available for Transient and AC Analysis
Applications
The NCP1015AP100G is designed for use in various offline Switch-Mode Power Supplies (SMPS) applications, particularly where low standby power and high efficiency are crucial. It is suitable for:
- Low-cost and robust power supplies
- Applications requiring low acoustic noise
- Systems needing dynamic self-supply without an auxiliary winding
- Power supplies with high voltage input (up to 700 V)
- Efficient standby power management
Q & A
- What is the voltage rating of the MOSFET in the NCP1015AP100G?
The MOSFET in the NCP1015AP100G has a voltage rating of 700 V.
- What are the typical switching frequencies of the NCP1015AP100G?
The NCP1015AP100G operates at switching frequencies between 65 kHz and 100 kHz.
- What is the peak current limit of the NCP1015AP100G?
The peak current limit of the NCP1015AP100G is typically 450 mA.
- Does the NCP1015AP100G require an auxiliary winding for operation?
No, the NCP1015AP100G features dynamic self-supply and does not require an auxiliary winding for operation, although using one can improve standby performance.
- What is the purpose of the skip-cycle operation in the NCP1015AP100G?
The skip-cycle operation reduces acoustic noise and improves efficiency at low peak currents.
- How does the NCP1015AP100G protect against short-circuits?
The NCP1015AP100G has internal output short-circuit protection that detects and responds to short-circuit conditions by reducing output power and entering a latch-off phase.
- What is the standby power consumption of the NCP1015AP100G when using an auxiliary winding?
The standby power consumption can be below 100 mW when an auxiliary winding is used.
- Does the NCP1015AP100G have internal temperature shutdown?
- Is soft-start functionality included in the NCP1015AP100G?
- What is the purpose of frequency jittering in the NCP1015AP100G?
Frequency jittering improves the EMI signature of the power supply.
