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.