Overview
The NCP1012ST100T3G, part of the NCP101X series from 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 MOSFET, making it a comprehensive solution for building rugged and low-cost power supplies. The NCP1012ST100T3G is housed in a SOT-223 package and features advanced functionalities such as soft-start, frequency jittering, short-circuit protection, and dynamic self-supply, eliminating the need for an auxiliary winding.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| MOSFET Voltage Rating | 700 | V |
| Typical RDSon | 11 | Ω |
| Peak Current Setpoint | 250 | mA |
| Operating Frequency | 100 kHz | kHz |
| Package Type | SOT-223 | |
| Maximum Junction Temperature | 150 | °C |
| Storage Temperature Range | -60 to +150 | °C |
| Internal Soft-Start Time | 1.0 ms | ms |
| Frequency Dithering | ±3.3% | % |
| Maximum Duty Cycle | 67% | % |
Key Features
- Integrated 700 V MOSFET with low RDSon
- Current-mode fixed frequency operation (100 kHz for NCP1012ST100T3G)
- Dynamic Self-Supply (DSS) eliminating the need for an auxiliary winding
- Internal 1.0 ms soft-start
- Latched overvoltage protection with auxiliary winding operation
- Frequency jittering for better EMI signature
- Auto-recovery internal output short-circuit protection
- Below 100 mW standby power if auxiliary winding is used
- Internal temperature shutdown
- Direct optocoupler connection
- SPICE models available for transient analysis
- Pb-free and halide-free device
Applications
- Low power AC/DC adapters for chargers
- Auxiliary power supplies for USB, appliances, TVs, etc.
Q & A
- What is the NCP1012ST100T3G used for?
The NCP1012ST100T3G is used for building low standby power offline Switch-Mode Power Supplies (SMPS).
- What is the voltage rating of the MOSFET in the NCP1012ST100T3G?
The MOSFET in the NCP1012ST100T3G has a voltage rating of 700 V.
- What is the typical RDSon of the NCP1012ST100T3G?
The typical RDSon of the NCP1012ST100T3G is 11 Ω.
- What is the operating frequency of the NCP1012ST100T3G?
The operating frequency of the NCP1012ST100T3G is 100 kHz.
- What package type is the NCP1012ST100T3G available in?
The NCP1012ST100T3G is available in a SOT-223 package.
- Does the NCP1012ST100T3G require an auxiliary winding?
No, the NCP1012ST100T3G features Dynamic Self-Supply (DSS), which eliminates the need for an auxiliary winding.
- What is the internal soft-start time of the NCP1012ST100T3G?
The internal soft-start time of the NCP1012ST100T3G is 1.0 ms.
- What protection features does the NCP1012ST100T3G have?
The NCP1012ST100T3G includes features such as short-circuit protection, overvoltage protection, and internal temperature shutdown.
- Is the NCP1012ST100T3G Pb-free and halide-free?
Yes, the NCP1012ST100T3G is Pb-free and halide-free.
- What are some typical applications of the NCP1012ST100T3G?
Typical applications include low power AC/DC adapters for chargers and auxiliary power supplies for USB, appliances, and TVs.
