Overview
The NCP4304BDR2G, produced by onsemi, is a highly versatile and full-featured controller and driver designed to control synchronous rectification circuitry in switch-mode power supplies (SMPS). This device is tailored for various topologies including flyback, forward, and Half Bridge Resonant LLC configurations. It ensures reliable and noiseless operation by combating ringing induced by PCB layout and parasitic elements through externally adjustable minimum on and off times. The NCP4304BDR2G is particularly noted for its low turn-off delay time, high sink current capability, and automatic package parasitic inductance compensation, which collectively enhance the efficiency of SMPS systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC (IC Supply Voltage) | −0.3 to 30 | V |
| VDRV (Driver Output Voltage) | −0.3 to 17 | V |
| VCS (Current Sense Input dc Voltage) | −4 to 200 | V |
| IDRV_pk(source) (Output source peak current) | 2.5 | A |
| IDRV_pk(sink) (Output sink peak current) | 5 | A |
| VDRV(min_B) (Minimum drive output voltage for B version) | 4.5 | V |
| Operating Voltage Range | Up to 30 V | V |
| Maximum Frequency of Operation | Up to 500 kHz | kHz |
| Package | SOIC−8 (Pb−Free) | |
| Gate Drive Clamp | 6 V (NCP4304B) | V |
Key Features
- Self-Contained Control of Synchronous Rectifier in CCM, DCM, and QR Flyback Applications
- Precise True Secondary Zero Current Detection with Adjustable Threshold
- Automatic Parasitic Inductance Compensation Input
- Typically 40 ns Turn off Delay from Current Sense Input to Driver
- Zero Current Detection Pin Capability up to 200 V
- Optional Ultrafast Trigger Interface for Further Improved Performance in Applications that Work in Deep CCM
- Disable Input to Enter Standby or Low Consumption Mode
- Adjustable Minimum On Time Independent of VCC Level
- Adjustable Minimum Off Time Independent of VCC Level
- Low Startup and Standby Current Consumption
- Pb−Free Device
Applications
- Notebook Adapters
- High Power Density AC/DC Power Supplies
- Gaming Consoles
- All SMPS with High Efficiency Requirements
Q & A
- What is the primary function of the NCP4304BDR2G?
The NCP4304BDR2G is designed to control synchronous rectification circuitry in switch-mode power supplies (SMPS), ensuring high efficiency in various topologies.
- What are the supported topologies for the NCP4304BDR2G?
The device supports flyback, forward, and Half Bridge Resonant LLC configurations.
- What is the operating voltage range of the NCP4304BDR2G?
The operating voltage range is up to 30 V.
- What is the maximum frequency of operation for the NCP4304BDR2G?
The maximum frequency of operation is up to 500 kHz.
- How does the NCP4304BDR2G handle parasitic inductance?
The device features an automatic package parasitic inductance compensation system.
- What is the gate drive clamp voltage for the NCP4304BDR2G?
The gate drive clamp voltage is 6 V for the NCP4304B version.
- Can the minimum on and off times be adjusted?
- What is the peak current sink/source drive capability of the NCP4304BDR2G?
The device has a peak current sink/source drive capability of 5 A/2.5 A.
- How does the NCP4304BDR2G enter standby or low consumption mode?
The device enters standby or low consumption mode through the disable input.
- Is the NCP4304BDR2G a Pb-free device?
