Overview
The NCP1910B100DWR2G, produced by onsemi, is a high-performance combo controller designed for powering next-generation ATX power supplies and flat TVs. This controller integrates a state-of-the-art circuitry, including a Continuous Conduction Mode (CCM) Power Factor Controller (PFC) and a LLC (Resonant) controller. It is housed in a SO−24WB package, ensuring compact and efficient design. The NCP1910B100DWR2G is optimized for high efficiency and reliability, making it suitable for various power supply applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC(on) | 9.4 | 10.4 | 11.4 | V |
| VCC(min) | 8 | 9 | 10 | V |
| VBoot(on) | 7.8 | 8.8 | 9.8 | V |
| VBoot(min) | 7 | 8 | 9 | V |
| ICC1 (PFC Consumption Alone) | - | - | 5.9 (65 kHz), 6.4 (100 kHz) | mA |
| ICC4 (IC Consumption, Both PFC & LLC) | - | - | 7.2 (65 kHz), 7.3 (100 kHz) | mA |
| FPSW (PFC Switching Frequency) | 58 | 65 | 72 | kHz (65 kHz Version) |
| FPSW (PFC Switching Frequency) | 90 | 100 | 110 | kHz (100 kHz Version) |
| FLsw (LLC Switching Frequency) | 208 | 245 | 282 | kHz |
| Vref-out (Reference Voltage) | 4.75 | 5 | 5.25 | V |
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 to Help Meeting Hold-up Time Specifications
- 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 NCP1910B100DWR2G?
The NCP1910B100DWR2G is a high-performance combo controller designed for powering next-generation ATX power supplies and flat TVs, integrating both PFC and LLC controllers.
- What are the switching frequencies of the PFC and LLC controllers?
The PFC controller operates at fixed frequencies of 65 kHz or 100 kHz, while 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 over voltage protection work?
The controller includes an independent over voltage protection sensing pin with latch-off capability and a second OVP input for redundancy.
- What is the significance of the on/off control pin?
The on/off control pin allows for secondary-based remote control, enabling the PFC to start first and then authorizing the LLC to work once the feedback is in regulation.
- What are the key safety features of the NCP1910B100DWR2G?
The controller includes features such as fast fault input with auto-recovery soft-start, over current protection, and line brown-out detection.
- How does the power good output management signal work?
The power good output signal is an open-collector signal that indicates when the bulk voltage is within acceptable limits, and it opens when the bulk voltage falls below a set level.
- What is the thermal resistance junction-to-air of the NCP1910B100DWR2G?
The thermal resistance junction-to-air is 80°C/W for a 50 mm^2, 1 oz copper area and 65°C/W for a 650 mm^2, 1 oz copper area.
- What is the storage temperature range for the NCP1910B100DWR2G?
The storage temperature range is from -60°C to +150°C.
- Is the NCP1910B100DWR2G Pb-Free?
