Overview
The UC2875DWPG4 is a bipolar phase-shifted full-bridge controller integrated circuit produced by Texas Instruments. This device is designed to control a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other, enabling constant frequency pulse-width modulation and resonant, zero-voltage switching for high efficiency performance at high frequencies. The UC2875 family can be configured for either voltage or current mode operation and includes features for fast fault protection and efficient switching.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 28-SOIC (DW) |
| Pins | 28 |
| Operating Temperature Range (°C) | -25 to 85 |
| Supply Voltage (Vcc/Vdd) | 9.5V to 20V |
| Switching Frequency | Up to 1MHz |
| Output Type | Four 2A Totem Pole Outputs |
| Undervoltage Lockout (UVLO) | 10.75V with 1.5V hysteresis |
| Startup Current | 150µA |
| Output Isolation | Non-Isolated |
| Duty Cycle | 0 to 100% |
| Fault Protection | Current Limiting with Full Cycle Restart |
Key Features
- Zero to 100% Duty Cycle Control
- Programmable Output Turn-On Delay
- Compatible with Voltage or Current Mode Topologies
- Practical Operation at Switching Frequencies up to 1MHz
- Four 2A Totem Pole Outputs
- 10MHz Error Amplifier
- Undervoltage Lockout (UVLO) with Outputs Active Low During UVLO
- Soft-Start Control
- Latched Over-Current Comparator with Full Cycle Restart
- Trimmed Reference and Flexible Ramp Generation and Slope Compensation Circuitry
Applications
The UC2875DWPG4 is suitable for various high-efficiency power conversion applications, including:
- Offline AC-DC Converters
- Resonant and Zero-Voltage Switching Power Supplies
- High-Frequency Power Conversion Systems
- Phase-Shifted Full-Bridge Topologies
Q & A
- What is the primary function of the UC2875DWPG4?
The UC2875DWPG4 is a bipolar phase-shifted full-bridge controller designed to control a bridge power stage for high-efficiency power conversion.
- What are the operating temperature ranges for the UC2875DWPG4?
The operating temperature range is -25°C to 85°C.
- What is the maximum switching frequency of the UC2875DWPG4?
The device can operate at switching frequencies up to 1MHz.
- What type of outputs does the UC2875DWPG4 have?
The device has four 2A totem pole outputs.
- What is the undervoltage lockout (UVLO) threshold for the UC2875DWPG4?
The UVLO threshold is 10.75V with 1.5V hysteresis.
- Does the UC2875DWPG4 support soft-start control?
- What kind of fault protection does the UC2875DWPG4 offer?
The device has latched over-current comparator with full cycle restart.
- Is the UC2875DWPG4 RoHS compliant?
- What is the package type of the UC2875DWPG4?
The device is packaged in a 28-pin SOIC (DW) package.
- Can the UC2875DWPG4 be synchronized with an external clock signal?
