Overview
The NCP1654BD200R2G is a Power Factor Controller (PFC) designed by onsemi for Continuous Conduction Mode (CCM) power factor correction step-up pre-converters. This controller is housed in a SO8 package and is optimized for compact and robust PFC stages. It integrates various safety features and minimizes the number of external components required, simplifying the PFC implementation. The NCP1654 is suitable for applications where high power factor, reliability, and cost-effectiveness are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage (VCC) | 9 - 20 | V |
| Transient Power Supply Voltage | +25 | V (duration < 10 ms, IVCC < 10 mA) |
| Input Voltage (Vin) | -0.3 to +10 | V |
| Output Drive Capability | ±1.5 | A |
| Switching Frequency | 200 kHz | kHz |
| Operating Junction Temperature Range | -40 to +125 | °C |
| Maximum Power Dissipation @ TA = 70°C | 450 mW | mW |
| Thermal Resistance Junction-to-Air | 178 °C/W | °C/W |
| Start-Up Current | < 75 µA | µA |
| Shutdown Current | < 400 µA | µA |
| Overcurrent Protection Threshold | 185 - 215 µA | µA |
Key Features
- IEC61000-3-2 Compliant
- Average Current Continuous Conduction Mode
- Fast Transient Response
- Very Few External Components Required
- Low Startup and Shutdown Currents
- Low Operating Consumption
- ±1.5 A Totem Pole Gate Drive
- Accurate Fully Integrated 65/133/200 kHz Oscillator
- Latching PWM for Cycle-by-Cycle Duty-Cycle Control
- Internally Trimmed Internal Reference
- Undervoltage Lockout with Hysteresis
- Soft-Start for Smooth Startup Operation
- Shutdown Function
- Pin to Pin Compatible with Industry Standard
- Pb-Free Device
Safety Features:
- Inrush Currents Detection
- Overvoltage Protection
- Undervoltage Detection for Open Loop Protection or Shutdown
- Brown-Out Detection
- Accurate Overcurrent Limitation
- Overpower Limitation
- Thermal Shutdown
Applications
- Flat TVs
- PC Desktops
- AC Adapters
- White Goods
- Other Offline Switch-Mode Power Supplies (SMPS)
Q & A
- What is the primary function of the NCP1654BD200R2G?
The NCP1654BD200R2G is a controller for Continuous Conduction Mode (CCM) power factor correction step-up pre-converters.
- What is the switching frequency of the NCP1654BD200R2G?
The switching frequency is 200 kHz.
- What is the operating voltage range for the VCC pin?
The operating voltage range for the VCC pin is 9 to 20 volts.
- What safety features are integrated into the NCP1654BD200R2G?
The device includes overvoltage protection, undervoltage detection, brown-out detection, overcurrent limitation, overpower limitation, and thermal shutdown.
- How does the soft-start feature work in the NCP1654BD200R2G?
The soft-start feature involves a gradual increase in the duty cycle during startup, reducing voltage and current stress on the MOSFET.
- What is the maximum output drive capability of the NCP1654BD200R2G?
The maximum output drive capability is ±1.5 A.
- What are the typical applications for the NCP1654BD200R2G?
Typical applications include flat TVs, PC desktops, AC adapters, white goods, and other offline SMPS.
- Is the NCP1654BD200R2G Pb-free?
Yes, the NCP1654BD200R2G is a Pb-free device.
- What is the thermal shutdown temperature for the NCP1654BD200R2G?
The thermal shutdown temperature is typically 150°C, with a hysteresis of 30°C.
- How does the brown-out detection work in the NCP1654BD200R2G?
The brown-out detection disables the PFC stage when low AC line conditions are detected, protecting the power switch from excessive stress.
- What is the purpose of the undervoltage lockout feature in the NCP1654BD200R2G?
The undervoltage lockout feature turns off the circuit if the feedback voltage falls below a certain threshold, protecting the PFC stage from low AC line conditions or feedback network failures.
