Overview
The NCP4306AAHZZZADR2G is a high-performance secondary side synchronous rectification driver designed by onsemi. This component is tailored to control synchronous rectification MOSFETs in switch-mode power supplies (SMPS), enhancing efficiency in various topologies such as DCM or CCM flyback, quasi-resonant flyback, forward, and half-bridge resonant LLC. The NCP4306 features advanced capabilities including self-synchronization, adjustable minimum on and off times, and a light load detection architecture to ensure high efficiency across different load conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | −0.3 to 37.0 | V |
| Operating Junction Temperature (TJ) | −40 to 125 | °C |
| Driver Output Voltage (VDRV) | −0.3 to 17.0 | V |
| Current Sense Input Voltage (VCS) | −4 to 200 | V |
| Turn Off Delay from Current Sense Input to Driver | Typically 15 ns | ns |
| Peak Current Sink / Source Drive Capability | 7 A / 2 A | A |
| UVLO Threshold (VCC rising/falling) | 3.7-4.2 V / 3.2-3.7 V | V |
| Package Type | SOIC-8 | |
| Maximum Operation Frequency | Up to 1 MHz |
Key Features
- Self-contained control of synchronous rectifier in CCM, DCM, and QR for flyback or LLC applications
- Precise true secondary zero current detection
- Ultrafast turn-off trigger interface and disable input (10.5 ns)
- Adjustable or fixed minimum on-time and off-time with ringing detection
- Improved robust self-synchronization capability
- High sink current capability (7 A) and source drive capability (2 A)
- Operating voltage range up to VCC = 35 V
- Automatic light-load disable mode
- GaN transistor driving capability
- Low startup and disable current consumption
Applications
- High power density AC/DC power supplies
- Notebook adapters
- Server power supplies (aux power stage)
- ATX and all-in-one power supplies
- High density USB adapters
Q & A
- What is the primary function of the NCP4306AAHZZZADR2G?
The primary function is to control synchronous rectification MOSFETs in switch-mode power supplies. - What are the supported topologies for the NCP4306?
The NCP4306 supports DCM or CCM flyback, quasi-resonant flyback, forward, and half-bridge resonant LLC topologies. - What is the operating voltage range of the NCP4306?
The operating voltage range is up to VCC = 35 V. - What is the maximum operation frequency of the NCP4306?
The maximum operation frequency is up to 1 MHz. - Does the NCP4306 support GaN MOSFETs?
Yes, it supports GaN MOSFETs with a 5 V gate clamp. - What is the turn-off delay from the current sense input to the driver?
Typically 15 ns. - What is the peak current sink and source drive capability of the NCP4306?
7 A sink and 2 A source. - What is the purpose of the self-synchronization feature?
The self-synchronization feature ensures reliable and noiseless operation of the SR system. - How does the NCP4306 handle light load conditions?
The NCP4306 features an automatic light-load disable mode to achieve high efficiency at light loads. - What is the package type of the NCP4306AAHZZZADR2G?
The package type is SOIC-8.
