Overview
The NCP1077STAT3G, 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 NCP1077STAT3G features advanced protection mechanisms, including soft-start, frequency-jittering, short-circuit protection, and overvoltage protection, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| MOSFET On-State Resistance (RDS(on)) | 4.7 | Ω |
| Peak Current (Ipeak) | 800 | mA |
| Oscillation Frequency | 65, 100, 130 | kHz |
| Maximum Duty Cycle | 62-73% | % |
| Supply Voltage Range (VCC) | 6.1-8.6 | V |
| Power Switch Circuit Breakdown Voltage (BVDSS) | 700 | V |
| Internal IC Consumption (ICC1) | 0.7-1.3 | mA |
Key Features
- Built-in 700 V MOSFET: With an on-state resistance of 4.7 Ω, ensuring efficient power switching.
- 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 ensures smooth startup.
- Short-Circuit Protection and Overvoltage Protection: Includes auto-recovery and AC input line voltage detection for enhanced reliability.
- Dynamic Self-Supply (DSS): Eliminates the need for an auxiliary winding, simplifying the circuit design.
- Low Standby Power Consumption: Reduces input power consumption below 50 mW at high line conditions.
- Large Creepage Distance Between High-Voltage Pins: Enhances safety and reliability in high-voltage applications.
Applications
The NCP1077STAT3G is suitable for a variety of low-power offline SMPS applications, including:
- Power adapters for consumer electronics.
- LED drivers and lighting systems.
- Small appliances and white goods.
- Industrial control systems and automation equipment.
- Medical devices requiring high reliability and efficiency.
Q & A
- What is the maximum operating frequency of the NCP1077STAT3G?
The NCP1077STAT3G operates at frequencies of 65 kHz, 100 kHz, and 130 kHz.
- What is the on-state resistance (RDS(on)) of the MOSFET in the NCP1077STAT3G?
The RDS(on) is 4.7 Ω.
- What protection features are included in the NCP1077STAT3G?
The component includes short-circuit protection, overvoltage protection with auto-recovery, and AC input line voltage detection.
- How does the Dynamic Self-Supply (DSS) feature work?
The DSS feature eliminates the need for an auxiliary winding, simplifying the circuit design and reducing component count.
- What is the typical standby power consumption of the NCP1077STAT3G?
The standby power consumption is below 50 mW at high line conditions.
- What are the available package types for the NCP1077STAT3G?
The component is available in PDIP-7 and SOT-223 packages.
- What is the maximum duty cycle of the NCP1077STAT3G?
The maximum duty cycle ranges from 62% to 73%.
- How does the soft-start feature benefit the operation of the NCP1077STAT3G?
The soft-start feature reduces electromagnetic interference (EMI) and ensures a smooth startup process.
- What is the breakdown voltage (BVDSS) of the power switch circuit?
The BVDSS is 700 V.
- What is the internal IC consumption (ICC1) of the NCP1077STAT3G?
The ICC1 ranges from 0.7 mA to 1.3 mA.
