Overview
The NCP1070STAT3G, produced by onsemi, is a high-voltage switcher integrated circuit designed for low power offline Switch-Mode Power Supplies (SMPS). This component integrates a fixed frequency current mode controller with a 700 V MOSFET, offering a high level of integration and efficiency. It is available in PDIP-7 or SOT-223 packages, making it versatile for various applications.
The NCP1070STAT3G features advanced protection mechanisms, including soft-start, frequency-jittering, short-circuit protection, skip-cycle, and overvoltage protection with auto-recovery. It also includes a Dynamic Self-Supply (DSS) feature, eliminating the need for an auxiliary winding. The IC operates at one of three available frequencies (65, 100, or 130 kHz) and enters frequency foldback and skip modes to optimize efficiency at light loads.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| MOSFET On-State Resistance (RDS(on)) | 22 | Ω |
| Peak Current (Ipeak) | 250 | mA |
| Oscillation Frequency (fOSC) | 65, 100, 130 | kHz |
| Maximum Duty Cycle (Dmax) | 62-68% | % |
| Startup Breakdown Voltage (BVDSS) | 700 | V |
| VCC On Voltage (VCC(on)) | 7.8-8.2 | V |
| VCC Off Voltage (VCC(off)) | 6.1-6.6 | V |
| Internal IC Consumption (ICC1) | 0.7-1.3 | mA |
Key Features
- Built-in 700 V MOSFET: With on-state resistance (RDS(on)) of 22 Ω for the NCP1070STAT3G.
- 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 improves reliability.
- Short-Circuit Protection and Skip-Cycle: Enhances safety and efficiency during light load conditions.
- Overvoltage Protection with Auto-Recovery: Protects against voltage spikes and ensures continuous operation.
- Dynamic Self-Supply (DSS): Eliminates the need for an auxiliary winding, simplifying the circuit design.
- Large Creepage Distance Between High-Voltage Pins: Ensures high isolation and safety.
Applications
- Low Power Offline SMPS: Ideal for applications requiring efficient and reliable power conversion, such as consumer electronics, lighting systems, and small appliances.
- Power Adapters and Chargers: Suitable for designing compact and efficient power adapters and chargers.
- Industrial Control Systems: Can be used in various industrial control systems where high reliability and efficiency are crucial.
- Medical Devices: Applicable in medical devices that require stable and efficient power supply.
Q & A
- What is the maximum operating voltage of the MOSFET in the NCP1070STAT3G?
The maximum operating voltage of the MOSFET is 700 V.
- What are the available oscillation frequencies for the NCP1070STAT3G?
The available frequencies are 65 kHz, 100 kHz, and 130 kHz.
- What is the peak current limit for the NCP1070STAT3G?
The peak current limit is 250 mA.
- Does the NCP1070STAT3G have built-in overvoltage protection?
- What is the purpose of the Dynamic Self-Supply (DSS) feature?
The DSS feature eliminates the need for an auxiliary winding, simplifying the circuit design and reducing component count.
- How does the NCP1070STAT3G handle light load conditions?
The IC enters frequency foldback and skip modes to optimize efficiency at light loads.
- What is the typical internal IC consumption during MOSFET switching?
The typical internal IC consumption during MOSFET switching is 0.7-1.3 mA.
- Does the NCP1070STAT3G have short-circuit protection?
- What is the maximum duty cycle for the NCP1070STAT3G?
The maximum duty cycle is 62-68%.
- What are the package options for the NCP1070STAT3G?
The component is available in PDIP-7 or SOT-223 packages.
