Overview
The NCP43080ADR2G, produced by onsemi, is a synchronous rectifier controller designed for 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 NCP43080ADR2G supports various MOSFET package types and PCB layouts through externally adjustable minimum on-time and off-time blanking periods. Additionally, it includes a self-synchronization feature and utilizes Kelvin connection to the MOSFET for high efficiency at full load and light load detection for improved efficiency under light load conditions.
Key Specifications
| Parameter | Symbol | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| Supply Voltage | VCC | V | -0.3 | 37.0 | |
| Driver Output Voltage | VDRV | V | -0.3 | 17.0 | |
| Current Sense Input Voltage | VCS | V | -4 | 150 | |
| Operating Frequency | Hz | 1 MHz | |||
| Output Peak Source Current | IDRV_SOURCE | A | 4 | ||
| Output Peak Sink Current | IDRV_SINK | A | 8 | ||
| Driver Source Resistance | RDRV_SOURCE | Ω | 1.2 | ||
| Driver Sink Resistance | RDRV_SINK | Ω | 0.5 | ||
| Turn On CS Threshold Voltage | VTH_CS_ON | mV | -120 | -75 | -40 |
| Turn Off CS Threshold Voltage | VTH_CS_OFF | mV | -1 | 0 |
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).
- Adjustable minimum on-time and off-time with ringing detection.
- Adjustable maximum on-time for CCM controlling of primary QR controller.
- Improved robust self-synchronization capability.
- 8 A / 4 A peak current sink/source drive capability.
- Operating voltage range up to VCC = 35 V.
- Automatic light-load and disable mode.
- Adaptive gate drive clamp.
- GaN transistor driving capability (options A and C).
- Low startup and disable current consumption.
- Maximum operation frequency up to 1 MHz.
- Available in SOIC-8, DFN-8 (4x4), and WDFN8 (2x2) packages.
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 NCP43080ADR2G?
The NCP43080ADR2G is a synchronous rectifier controller designed for switch-mode power supplies, enabling high-efficiency designs in flyback and quasi-resonant flyback topologies.
- What are the key benefits of using the NCP43080ADR2G?
The key benefits include high efficiency, self-synchronization, adjustable on-time and off-time, robust current sense capability, and the ability to drive GaN devices.
- What is the operating voltage range of the NCP43080ADR2G?
The operating voltage range is from 4 V (options A, D, and Q) or 8 V (options B and C) to 35 V.
- What are the typical applications for the NCP43080ADR2G?
Typical applications include notebook adapters, high power density AC/DC power supplies, LCD TVs, and all SMPS with high efficiency requirements.
- How does the NCP43080ADR2G handle light-load conditions?
The NCP43080ADR2G features an automatic light-load and disable mode, which helps in reducing power consumption during no-load conditions.
- What is the significance of the self-synchronization feature in the NCP43080ADR2G?
The self-synchronization feature ensures reliable and noiseless operation of the SR system, preventing false triggering issues.
- Can the NCP43080ADR2G drive GaN transistors?
- What is the maximum operation frequency of the NCP43080ADR2G?
The maximum operation frequency is up to 1 MHz.
- What are the available package types for the NCP43080ADR2G?
The NCP43080ADR2G is available in SOIC-8, DFN-8 (4x4), and WDFN8 (2x2) packages.
- How does the NCP43080ADR2G manage turn-off current threshold?
The NCP43080ADR2G offers a precise turn-off threshold of 0 mV, significantly reducing the turn-off current threshold and improving efficiency compared to other SR controllers.
- What is the purpose of the LLD pin in the NCP43080ADR2G?
The LLD (Light Load Detection) pin can be used to reduce the gate driver voltage clamp according to application load conditions and to activate the disable state to decrease power consumption in no-load conditions.
