Overview
The NCP4303ADR2G, produced by onsemi, is a full-featured controller and driver designed to control synchronous rectification circuitry in switch-mode power supplies (SMPS). This component is highly versatile and can be used in various topologies, including flyback, forward, and half-bridge resonant LLC configurations. It is tailored to enhance the efficiency and reliability of SMPS systems by providing precise control over the synchronous rectification process.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Operating Voltage Range | 10.4 to 30 | V |
| Turn-off Delay Time | Typically 40 ns | ns |
| Peak Current Sink/Source Drive Capability | 5 A / 2.5 A | A |
| Maximum Frequency of Operation | Up to 500 kHz | kHz |
| Package Type | SOIC-8 (Pb-Free) | |
| Gate Drive Clamp | 12 V (NCP4303A) or 6 V (NCP4303B) | V |
| Minimum On/Off Time Adjustment | Adjustable via external resistors | |
| Zero Current Detection Pin Capability | Up to 200 V | V |
| Startup and Standby Current Consumption | Low |
Key Features
- Self-contained control of synchronous rectifier in CCM, DCM, and QR flyback applications.
- Precise true secondary zero current detection with adjustable threshold.
- Automatic parasitic inductance compensation input.
- Ultrafast trigger interface for improved performance in deep CCM applications.
- Disable input to enter standby or low consumption mode.
- Adjustable minimum on and off times independent of VCC level.
- High sink current capability and low turn-off delay time.
- Wide operating VCC range and low startup and standby current consumption.
Applications
- Notebook adapters.
- High power density AC/DC power supplies.
- Gaming consoles.
- All SMPS with high efficiency requirements.
Q & A
- What is the primary function of the NCP4303ADR2G? The NCP4303ADR2G is a controller and driver designed to control synchronous rectification circuitry in switch-mode power supplies.
- In which topologies can the NCP4303ADR2G be used? It can be used in flyback, forward, and half-bridge resonant LLC configurations.
- What is the operating voltage range of the VCC pin? The VCC pin operates within a range of 10.4 V to 30 V.
- What is the typical turn-off delay time of the NCP4303ADR2G? The typical turn-off delay time is 40 ns.
- What is the peak current sink/source drive capability of the NCP4303ADR2G? The peak current sink/source drive capability is 5 A / 2.5 A.
- What is the maximum frequency of operation for the NCP4303ADR2G? The maximum frequency of operation is up to 500 kHz.
- How can the minimum on and off times be adjusted? The minimum on and off times can be adjusted via external resistors.
- What is the purpose of the ultrafast trigger interface? The ultrafast trigger interface is used to improve performance in deep CCM applications by allowing earlier turn-off of the SR MOSFET.
- How does the NCP4303ADR2G handle parasitic inductance compensation? It features an automatic parasitic inductance compensation input to optimize efficiency.
- What are some typical applications of the NCP4303ADR2G? Typical applications include notebook adapters, high power density AC/DC power supplies, gaming consoles, and all SMPS with high efficiency requirements.
