Overview
The UC3854BNG4 is an enhanced high power factor preregulator controller produced by Texas Instruments. This integrated circuit is designed to achieve near-unity power factor in power supply systems, ensuring efficient and compliant operation. The UC3854BNG4 uses average current mode control to shape the AC input line current waveform to correspond to the AC input line voltage, thereby minimizing line current distortion. It is available in a 16-pin PDIP package and is suitable for a wide range of high-power applications.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Integrated Circuit Type | Power Factor Correction controller |
| Input Voltage Range | 10~20 V |
| Mounting | Through-Hole Technology (THT) |
| Case | PDIP16 |
| Dimensions | 19.3 mm x 6.35 mm x 3.9 mm |
| Operating Temperature Range | 0°C to 70°C |
| Operating Supply Current | 12 mA |
| Startup Current | 0.25 mA |
| UVLO Thresholds On/Off | 10.5 V / 10 V |
| Practical Operating Frequency (Max) | 0.2 MHz |
| Peak Output Sink/Source Current Gate Drive | 1 A / -1 A |
Key Features
- Controls Boost PWM to Near-Unity Power Factor
- Limits Line Current Distortion to <3%
- World-Wide Operation Without Switches
- Accurate Power Limiting
- Fixed-Frequency Average Current-Mode Control
- High Bandwidth (5 MHz), Low-Offset Current Amplifier
- Integrated Current- and Voltage-Amplifier Output Clamps
- Multiplier Improvements: Linearity, 500 mV AC Offset (Eliminates External Resistor)
- VREFGOOD Comparator and Faster, Improved Accuracy ENABLE Comparator
- UVLO Options (16 V/10 V or 10.5 V/10 V)
Applications
The UC3854BNG4 is designed for high-power applications requiring active power factor correction, such as:
- Switch-Mode Power Supplies
- Offline Power Systems
- High-Power DC-DC Converters
- Industrial Power Supplies
- Aerospace and Defense Power Systems
Q & A
- What is the primary function of the UC3854BNG4?
The UC3854BNG4 is a power factor correction (PFC) controller designed to achieve near-unity power factor in power supply systems. - What is the input voltage range of the UC3854BNG4?
The input voltage range is 10~20 V. - What type of mounting does the UC3854BNG4 use?
The UC3854BNG4 uses Through-Hole Technology (THT) mounting. - What is the operating temperature range of the UC3854BNG4?
The operating temperature range is 0°C to 70°C. - What is the maximum operating frequency of the UC3854BNG4?
The practical operating frequency is up to 0.2 MHz. - Does the UC3854BNG4 have built-in current and voltage amplifier output clamps?
Yes, it has integrated current- and voltage-amplifier output clamps. - What are the UVLO thresholds for the UC3854BNG4?
The UVLO thresholds are 10.5 V / 10 V. - Is the UC3854BNG4 suitable for high-power applications?
Yes, it is suitable for applications up to 750W. - What type of control method does the UC3854BNG4 use?
The UC3854BNG4 uses fixed-frequency average current-mode control. - Is the UC3854BNG4 available in different package types?
Yes, it is available in PDIP, SOIC Wide, CDIP, and PLCC packages.
