Overview
The NCP1012ST65T3G, part of the NCP101X series from onsemi, is a highly integrated power management solution designed for offline Switch-Mode Power Supplies (SMPS). This component combines a fixed-frequency current-mode controller with a 700 V MOSFET, making it an ideal choice for building rugged and low-cost power supplies. The NCP1012ST65T3G is housed in a SOT-223 package and features a Dynamic Self-Supply (DSS) mechanism, eliminating the need for an auxiliary winding. This design simplifies transformer design and enhances control in various output conditions, including constant current operations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOT-223 | - |
| MOSFET Voltage Rating | 700 | V |
| Typical RDSon | 11 | Ω |
| Peak Current Setpoint | 250 | mA |
| Operating Frequency | 65 kHz | - |
| Soft-Start Time | 1.0 ms | - |
| Maximum Junction Temperature | 150 | °C |
| Standby Power (with Auxiliary Winding) | < 100 mW | - |
| Frequency Jittering | ±3.3% | - |
| Internal Temperature Shutdown | 140-150 °C | - |
Key Features
- Fixed-Frequency Current-Mode Operation: Available frequencies include 65 kHz, 100 kHz, and 130 kHz.
- Dynamic Self-Supply (DSS): No need for an auxiliary winding, simplifying transformer design and enhancing control in various output conditions.
- Soft-Start and Frequency Jittering: Reduces electromagnetic interference (EMI) and ensures smooth startup.
- Short-Circuit Protection and Skip-Cycle Operation: Prevents acoustic noise and protects against short circuits.
- Latched Overvoltage Protection: Ensures robust protection against overvoltage conditions.
- Internal Temperature Shutdown: Protects the device from overheating.
- Low Standby Power: Below 100 mW when using an auxiliary winding.
- Pb-Free and Halide-Free: Compliant with environmental regulations.
Applications
- Low Power AC/DC Adapters for Chargers: Ideal for charging applications requiring efficient and reliable power conversion.
- Auxiliary Power Supplies: Suitable for USB, appliances, TVs, and other consumer electronics.
Q & A
- What is the NCP1012ST65T3G used for?
The NCP1012ST65T3G is used for building rugged and low-cost offline Switch-Mode Power Supplies (SMPS).
- What package type does the NCP1012ST65T3G come in?
The NCP1012ST65T3G is housed in a SOT-223 package.
- What is the voltage rating of the MOSFET in the NCP1012ST65T3G?
The MOSFET in the NCP1012ST65T3G has a voltage rating of 700 V.
- What are the available operating frequencies for the NCP1012ST65T3G?
The available operating frequencies are 65 kHz, 100 kHz, and 130 kHz.
- Does the NCP1012ST65T3G require an auxiliary winding?
No, the NCP1012ST65T3G features Dynamic Self-Supply (DSS), eliminating the need for an auxiliary winding.
- What is the typical RDSon of the NCP1012ST65T3G?
The typical RDSon is 11 Ω.
- What is the peak current setpoint for the NCP1012ST65T3G?
The peak current setpoint is 250 mA.
- How does the NCP1012ST65T3G protect against short circuits?
The device features internal short-circuit protection and skip-cycle operation to prevent acoustic noise and protect against short circuits.
- What is the maximum junction temperature for the NCP1012ST65T3G?
The maximum junction temperature is 150 °C.
- Is the NCP1012ST65T3G environmentally compliant?
