Overview
The NCP1910B65DWR2G, produced by onsemi, is a high-performance combo controller designed for powering next-generation ATX power supplies and flat TV converters. This controller is housed in a SO−24WB package and integrates a state-of-the-art circuitry that includes a Continuous Conduction Mode (CCM) Power Factor Controller (PFC) and a LLC (Resonant) controller. The device is optimized for high efficiency and reliability, making it suitable for various offline power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC(on) | 9.4 - 11.4 | V |
| VCC(min) | 8 - 10 | V |
| VBoot(on) | 7.8 - 9.8 | V |
| VBoot(min) | 7 - 9 | V |
| PFC Switching Frequency | 65 kHz (for 65 kHz version) | kHz |
| LLC Switching Frequency | 25 kHz to 500 kHz | kHz |
| Maximum PFC Duty Cycle | 97% | % |
| Reference Voltage (Vref-out) | 4.75 - 5.25 | V |
| Thermal Resistance Junction-to-Air | 65 - 80 °C/W | °C/W |
| Storage Temperature Range | -60 to +150 °C | °C |
Key Features
- Fixed-Frequency 65 or 100 kHz CCM Power Factor Controller
- Average Current-Mode Control for Low Line Distortion
- Dynamic Response Enhancer Reduces Bulk Undershoot
- Independent Over Voltage Protection Sensing Pin with Latch-off Capability
- Adjustable Frequency Fold Back Improves Light Load Efficiency
- Adjustable Line Brown-Out Protection with 50 ms Delay
- Programmable Over current Threshold Leads to an Optimized Sensing Resistor
- ±1 A peak Current Drive Capability
- LLC Controller Operates from 25 kHz to 500 kHz
- On Board 600 V High-Voltage Drivers
- 1 A/0.5 A Sink/Source Capability
- Minimum Frequency Precision Down to ±3% Over Temperature Range
- Internally Fixed Dead-Time Value of 300 ns
- Adjustable Soft-Start Sequence
- Fast Fault Input with Soft-Start Trigger for Immediate Auto-recovery Protection
- On/Off Control Pin for Secondary-Based Remote Control
- On-Board 5 V Reference Voltage for Precise Thresholds/Hysteresis Adjustments
- Power Good Output Management Signal
Applications
- Multi Output ATX Power Supplies (A version)
- Flat TVs Power Supplies (B version)
Q & A
- What is the primary function of the NCP1910B65DWR2G?
The NCP1910B65DWR2G is a combo controller designed to manage both Power Factor Correction (PFC) and LLC (Resonant) control for ATX power supplies and flat TV converters.
- What are the switching frequencies for the PFC and LLC controllers?
The PFC controller operates at 65 kHz or 100 kHz, and the LLC controller operates from 25 kHz to 500 kHz.
- What is the purpose of the adjustable frequency fold back feature?
The adjustable frequency fold back feature improves light load efficiency by reducing switching losses as the load decreases.
- How does the device handle overvoltage protection?
The device includes an independent overvoltage protection sensing pin with latch-off capability and a second OVP input for redundancy.
- What is the role of the on/off control pin?
The on/off control pin allows for remote control of the controller, enabling or disabling the PFC and LLC operations based on the pin's state.
- What is the significance of the power good output management signal?
The power good output management signal indicates when the bulk voltage is within acceptable limits, helping in system monitoring and control.
- How does the device handle line brown-out protection?
The device features adjustable line brown-out protection with a 50 ms delay to help meet hold-up time specifications.
- What is the thermal resistance junction-to-air for this device?
The thermal resistance junction-to-air is between 65 and 80 °C/W, depending on the package and mounting conditions.
- Is the NCP1910B65DWR2G Pb-free?
Yes, the NCP1910B65DWR2G is a Pb-free device.
- What is the storage temperature range for this device?
The storage temperature range is from -60 to +150 °C.
