Overview
The NCP43080DDR2G is a synchronous rectifier controller produced by onsemi, designed for switch mode power supplies. It is packaged in an 8-pin SOIC and is optimized for high efficiency designs in flyback and quasi-resonant flyback topologies. The controller features externally adjustable minimum off-time and on-time blanking periods, allowing flexibility to drive various MOSFET package types and PCB layouts. It ensures reliable and noiseless operation of the synchronous rectifier (SR) system through its self-synchronization feature and utilizes Kelvin connection to the MOSFET for high efficiency at full load. Additionally, it includes light load detection architecture for high efficiency at light loads.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | −0.3 to 37.0 | V |
| Operating Junction Temperature | −40°C to 125°C | °C |
| Driver Output Voltage (VDRV) | −0.3 to 17.0 | V |
| Current Sense Input Voltage (VCS) | −4 to 150 | V |
| Peak Source Current (IDRV_SOURCE) | 4 | A |
| Peak Sink Current (IDRV_SINK) | 8 | A |
| Maximum Driver Output Voltage (VDRVMAX) | 9.0 to 10.5 | V |
| Minimum Driver Output Voltage (VDRVMIN) | 3.6 to 8.5 | 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, forward, or LLC applications.
- Precise true secondary zero current detection.
- Rugged current sense pin (up to 150 V) and adjustable minimum on-time.
- Adjustable minimum off-time with ringing detection.
- Improved robust self-synchronization capability.
- 8 A / 4 A peak current sink/source drive capability.
- Operating voltage range up to VCC = 35 V and GaN transistor driving capability.
- Automatic light-load and disable mode.
- Adaptive gate drive clamp.
- Low startup and disable current consumption.
Applications
- Power Management
- Portable Devices
- Consumer Electronics
- Notebook Adapters
- High Power Density AC/DC Power Supplies (Cell Phone Chargers)
- LCD TVs
- All SMPS with High Efficiency Requirements
Q & A
- What is the primary function of the NCP43080DDR2G?
The NCP43080DDR2G is a synchronous rectifier controller designed for switch mode power supplies, enabling high efficiency designs in flyback and quasi-resonant flyback topologies.
- What is the operating voltage range of the NCP43080DDR2G?
The operating voltage range is up to VCC = 35 V.
- What types of MOSFETs can the NCP43080DDR2G drive?
The controller can drive various MOSFET package types, including GaN devices, due to its high accuracy driver and 5 V gate clamp.
- What is the significance of the self-synchronization feature?
The self-synchronization feature ensures reliable and noiseless operation of the synchronous rectifier system.
- How does the controller handle light load conditions?
The controller utilizes light load detection architecture to achieve high efficiency at light loads.
- What is the maximum operation frequency of the NCP43080DDR2G?
The maximum operation frequency is up to 1 MHz.
- What are the typical applications of the NCP43080DDR2G?
Typical applications include notebook adapters, high power density AC/DC power supplies, LCD TVs, and all SMPS with high efficiency requirements.
- What is the package type of the NCP43080DDR2G?
The package type is SOIC-8.
- How does the controller adjust for minimum on-time and off-time?
The controller allows for externally adjustable minimum off-time and on-time blanking periods.
- What is the peak current sink/source drive capability of the NCP43080DDR2G?
The peak current sink/source drive capability is 8 A / 4 A.
