Overview
The NCP43080DMTTWG is a synchronous rectifier controller designed by onsemi for use in switch-mode power supplies. This controller is optimized for high-efficiency designs, particularly in flyback and quasi-resonant flyback topologies. It features a robust architecture that ensures reliable and noiseless operation of the synchronous rectification (SR) system. The NCP43080DMTTWG supports various operating modes, including Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM), and Quasi-Resonant (QR) modes, making it versatile for different power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | −0.3 to 37.0 | V |
| Driver Output Voltage (VDRV) | −0.3 to 17.0 | V |
| Current Sense Input Voltage (VCS) | −4 to 150 | V |
| Minimum ON-Time (tON_MIN) | 0.92 to 1.08 | μs |
| Minimum OFF-Time (tOFF_MIN) | 0.92 to 1.08 | μs |
| Maximum ON-Time (tON_MAX) | 4.3 to 5.3 | μs (VMAX_TON = 3 V) |
| Peak Current Sink/Source Drive Capability | 8 A / 4 A | A |
| Operating Frequency | Up to 1 MHz | Hz |
| Package Types | SOIC-8, DFN-8 (4x4), WDFN8 (2x2) | |
| VCC UVLO (Ver. A, D & Q) | 4.20 to 4.80 V (rising), 3.70 to 4.20 V (falling) | V |
Key Features
- Self-contained control of synchronous rectifier in CCM, DCM, and QR modes for flyback, forward, or LLC applications.
- Precise true secondary zero current detection.
- Rugged current sense pin (up to 150 V).
- Adjustable minimum ON-time and OFF-time with ringing detection.
- Improved robust self-synchronization capability.
- GaN transistor driving capability (options A and C).
- Low startup and disable current consumption.
- Adaptive gate drive clamp.
- Automatic light-load and disable mode.
- High accuracy driver with 5 V gate clamp.
Applications
- 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 NCP43080DMTTWG? The NCP43080DMTTWG is a synchronous rectifier controller designed for high-efficiency switch-mode power supplies.
- What are the supported operating modes of the NCP43080DMTTWG? It supports Continuous Conduction Mode (CCM), Discontinuous Conduction Mode (DCM), and Quasi-Resonant (QR) modes.
- What is the range of the supply voltage (VCC) for the NCP43080DMTTWG? The supply voltage range is from −0.3 to 37.0 V.
- What is the maximum operating frequency of the NCP43080DMTTWG? The maximum operating frequency is up to 1 MHz.
- What are the package types available for the NCP43080DMTTWG? The available package types are SOIC-8, DFN-8 (4x4), and WDFN8 (2x2).
- Does the NCP43080DMTTWG support GaN transistor driving? Yes, it supports GaN transistor driving for options A and C.
- How does the NCP43080DMTTWG handle light-load conditions? It features an automatic light-load and disable mode to reduce power consumption in no-load conditions.
- What is the purpose of the adjustable minimum ON-time and OFF-time? These adjustments provide flexibility to drive various MOSFET package types and PCB layouts, and help in overcoming false triggering issues.
- What is the significance of the self-synchronization feature in the NCP43080DMTTWG? The self-synchronization feature ensures reliable and noiseless operation of the SR system.
- How does the NCP43080DMTTWG manage turn-off current threshold? It offers a precise turn-off threshold of 0 mV, significantly reducing the turn-off current threshold and improving efficiency.
