Overview
The UC3854ANG4 is a high-power factor preregulator integrated circuit designed by Texas Instruments. This component is part of the UC3854 family and is specifically tailored for power factor correction (PFC) in high-power applications. The UC3854ANG4 uses average current-mode control to ensure stable and low-distortion operation, making it suitable for a wide range of power topologies and control methods. It is particularly useful in systems that require optimal power-line current utilization and minimal line-current distortion.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | UC3854ANG4 |
| Manufacturer | Texas Instruments |
| Category | Power Management ICs › PFC (Power Factor Correction) |
| Voltage - Supply | 10V ~ 20V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Through Hole |
| Package / Case | 16-DIP (0.300", 7.62mm) |
| Frequency - Switching | 200kHz |
| Current - Startup | 250µA |
| Mode | Average Current |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | Lead free / RoHS Compliant |
Key Features
- Average current-mode control for stable and low-distortion operation.
- Fixed-frequency PWM with a switching frequency of 200kHz.
- Includes a voltage amplifier, analog multiplier and divider, current amplifier, and a power MOSFET compatible gate driver.
- Features a 7.5-V reference, line anticipator, load-enable comparator, low-supply detector, and over-current comparator.
- Supports operation in both continuous and discontinuous modes without performance changes.
- Soft-start function to eliminate turn-on overshoot.
- Suitable for applications requiring high power factor correction, such as those exceeding 750W.
Applications
The UC3854ANG4 is designed for use in high-power systems that require active power factor correction. Typical applications include:
- High-power switching power supplies.
- Uninterruptible power supplies (UPS).
- Power conditioning equipment.
- Industrial power systems.
- Telecommunication power supplies.
Q & A
- What is the primary function of the UC3854ANG4?
The UC3854ANG4 is a power factor correction (PFC) controller designed to improve the power factor of high-power systems.
- What is the switching frequency of the UC3854ANG4?
The switching frequency of the UC3854ANG4 is 200kHz.
- What is the operating temperature range of the UC3854ANG4?
The operating temperature range is 0°C to 70°C.
- What type of control method does the UC3854ANG4 use?
The UC3854ANG4 uses average current-mode control.
- Is the UC3854ANG4 RoHS compliant?
- What is the startup current of the UC3854ANG4?
The startup current is 250µA.
- What package type does the UC3854ANG4 come in?
The UC3854ANG4 comes in a 16-DIP (0.300", 7.62mm) package.
- Does the UC3854ANG4 support soft-start functionality?
- What are some typical applications for the UC3854ANG4?
Typical applications include high-power switching power supplies, UPS, power conditioning equipment, industrial power systems, and telecommunication power supplies.
- What is the maximum operating supply voltage for the UC3854ANG4?
The maximum operating supply voltage is 20V.
