Overview
The NCP4306AAAZZZADR2G is a high-performance driver designed by onsemi to control synchronous rectification MOSFETs in switch-mode power supplies. This component is versatile and can be used in various topologies, including DCM or CCM flyback, quasi-resonant flyback, forward, and half-bridge resonant LLC configurations. It features high-performance drivers, self-synchronization, and light load detection to ensure high efficiency and reliable operation. The NCP4306 also supports the use of GaN MOSFETs due to its high accuracy driver and 5 V gate clamp.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage | VCC | -0.3 | - | 37.0 | V |
| Operating Junction Temperature | TJ | -40 | - | 125 | °C |
| Driver Output Voltage | VDRV | -0.3 | - | 17.0 | V |
| Current Sense Input Voltage | VCS | -4 | - | 200 | V |
| UVLO Threshold (VCC rising) | VCCON | 3.7 | 4.0 | 4.2 | V |
| UVLO Threshold (VCC falling) | VCCOFF | 3.2 | 3.5 | 3.7 | V |
| Turn Off Delay from Current Sense Input to Driver | tPD_OFF | 13 | 23 | - | ns |
| Peak Current Sink / Source Drive Capability | - | - | 7 A / 2 A | - | - |
| Maximum Operating Frequency | - | - | 1 MHz | - | - |
Key Features
- Precise True Secondary Zero Current Detection
- Typically 15 ns Turn off Delay from Current Sense Input to Driver
- Zero Current Detection Pin Capability up to 200 V
- Optional Ultrafast (10.5ns) Trigger Input
- Disable Input
- Adjustable Minimum ON Time and Minimum OFF Time
- dV/dt detection
- 7 A Sink, 2 A Source Drive capability
- Automatic Light Load Disable Mode
- 3.5V UVLO and Operation Voltage range up to 35V
- GaN Transistor Driving Capability
- Low Startup and Disable Current Consumption
- Self-Contained Control of Synchronous Rectifier in CCM, DCM, and QR for Flyback or LLC Applications
- Improved Robust Self Synchronization Capability
Applications
- Notebook Adapters
- High Power Density AC/DC Power Supplies (e.g., Cell Phone Chargers)
- Server Power Supplies aux power stage
- ATX & All-in-one Power Supplies
- High Density USB Adapters
- LCD TVs
- All SMPS with High Efficiency Requirements
Q & A
- What is the primary function of the NCP4306AAAZZZADR2G?
The NCP4306AAAZZZADR2G is a high-performance driver designed to control synchronous rectification MOSFETs in switch-mode power supplies.
- In which topologies can the NCP4306 be used?
The NCP4306 can be used in various topologies such as DCM or CCM flyback, quasi-resonant flyback, forward, and half-bridge resonant LLC configurations.
- What is the significance of the self-synchronization feature in the NCP4306?
The self-synchronization feature ensures reliable and noiseless operation of the synchronous rectification system.
- What is the maximum operating frequency of the NCP4306?
The maximum operating frequency of the NCP4306 is up to 1 MHz.
- What is the UVLO threshold for the NCP4306?
The UVLO threshold for the NCP4306 is between 3.7 V and 4.2 V for VCC rising, and between 3.2 V and 3.7 V for VCC falling.
- Can the NCP4306 drive GaN MOSFETs?
Yes, the NCP4306 can drive GaN MOSFETs due to its high accuracy driver and 5 V gate clamp.
- What is the turn-off delay from the current sense input to the driver?
The turn-off delay from the current sense input to the driver is typically 15 ns.
- What is the peak current sink/source drive capability of the NCP4306?
The peak current sink/source drive capability of the NCP4306 is 7 A / 2 A.
- Does the NCP4306 have an automatic light load disable mode?
Yes, the NCP4306 has an automatic light load disable mode to achieve high efficiency at light loads.
- What are some typical applications of the NCP4306?
