Overview
The NCP1010ST100T3G, 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 component integrates a fixed-frequency current-mode controller and a 700 V MOSFET, making it a comprehensive solution for building rugged and cost-effective power supplies. The NCP1010ST100T3G is housed in a SOT-223 package and features advanced functionalities such as soft-start, frequency jittering, short-circuit protection, and Dynamic Self-Supply (DSS), eliminating the need for an auxiliary winding.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-223 | - |
| Drain Voltage | -0.3 to 700 | V |
| Peak Drain Current | 100 | mA |
| Oscillator Frequency | 100 | kHz |
| Maximum Junction Temperature | 150 | °C |
| Storage Temperature Range | -60 to +150 | °C |
| Internal Current Setpoint | 225-275 | mA |
| Internal Pull-up Resistor | 18 | kΩ |
| Maximum Duty Cycle | 62-72 | % |
| Temperature Shutdown | 140-160 | °C |
Key Features
- Integrated Current-Mode Controller and 700 V MOSFET: Combines the control and power stages in a single monolithic structure.
- Dynamic Self-Supply (DSS): Eliminates the need for an auxiliary winding, simplifying transformer design and improving control in difficult output conditions.
- Short-Circuit Protection: Patented protection circuitry that monitors and responds to internal error flags, ensuring safe operation during short-circuit conditions.
- Soft-Start and Frequency Jittering: Reduces electromagnetic interference (EMI) and ensures smooth startup.
- Low Standby Power: Optimized for low power consumption during standby mode.
- Skip-Cycle Operation: Reduces power dissipation during light load conditions.
Applications
- Offline Switch-Mode Power Supplies (SMPS): Suitable for a wide range of SMPS applications requiring high efficiency and low standby power.
- Consumer Electronics: Ideal for power supplies in consumer electronics such as TVs, computers, and home appliances.
- Industrial Power Supplies: Used in industrial power supplies where reliability and efficiency are critical.
- LED Lighting: Can be used in LED lighting systems that require stable and efficient power supply.
Q & A
- What is the NCP1010ST100T3G?
The NCP1010ST100T3G is a self-supplied monolithic switcher from onsemi, designed for low standby power offline SMPS applications.
- What package type does the NCP1010ST100T3G come in?
The NCP1010ST100T3G is housed in a SOT-223 package.
- What is the maximum drain voltage of the NCP1010ST100T3G?
The maximum drain voltage is 700 V.
- What are the key features of the NCP1010ST100T3G?
Key features include an integrated current-mode controller and 700 V MOSFET, Dynamic Self-Supply, short-circuit protection, soft-start, frequency jittering, and low standby power.
- How does the Dynamic Self-Supply (DSS) feature work?
The DSS feature allows the IC to be supplied directly from the high-voltage DC rail, eliminating the need for an auxiliary winding and simplifying transformer design.
- What is the purpose of the short-circuit protection in the NCP1010ST100T3G?
The short-circuit protection monitors internal error flags and stops output pulses, reducing internal current consumption and preventing damage during short-circuit conditions.
- What are the typical applications of the NCP1010ST100T3G?
Typical applications include offline SMPS, consumer electronics, industrial power supplies, and LED lighting systems.
- What is the maximum junction temperature of the NCP1010ST100T3G?
The maximum junction temperature is 150°C.
- How does the skip-cycle operation work in the NCP1010ST100T3G?
The skip-cycle operation reduces power dissipation during light load conditions by skipping switching cycles when the load is below a certain threshold.
- What is the internal current setpoint for the NCP1010ST100T3G?
The internal current setpoint is between 225-275 mA.
- What is the purpose of the internal pull-up resistor in the NCP1010ST100T3G?
The internal pull-up resistor (18 kΩ) is used in the feedback section to ensure proper operation of the feedback loop.
