Overview
The UC2875DWP is a bipolar phase-shifted full-bridge controller produced by Texas Instruments. This integrated circuit 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 combined with resonant, zero-voltage switching for high efficiency performance at high frequencies. The UC2875DWP is available in a 28-pin SOIC (DW) package and operates over a temperature range of -25°C to 85°C.
Key Specifications
| Specification | Value |
|---|---|
| Package | 28-pin SOIC (DW) |
| Operating Temperature Range | -25°C to 85°C |
| Switching Frequency | Up to 1 MHz |
| Output Current | Four 2A Totem Pole Outputs |
| Undervoltage Lockout (UVLO) | 10.75V with 1.5V hysteresis |
| Error Amplifier Bandwidth | Exceeds 7 MHz |
| Startup Current | 150 µA |
| Over-Current Protection | Latched 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 to 1 MHz
- Four 2A Totem Pole Outputs
- 10 MHz Error Amplifier
- Undervoltage Lockout (UVLO)
- Low Startup Current (150 µA)
- Outputs Active Low During UVLO
- Soft-Start Control
- Latched Over-Current Comparator With Full Cycle Restart
- Trimmed Reference
Applications
The UC2875DWP is suitable for various high-efficiency power conversion applications, including but not limited to:
- Resonant and zero-voltage switching power supplies
- High-frequency DC-DC converters
- Power stages in voltage or current mode operation
- Systems requiring phase-shifted full-bridge control for efficient power management
Q & A
- What is the UC2875DWP used for? The UC2875DWP is used for controlling a bridge power stage in high-efficiency power conversion applications, particularly in resonant and zero-voltage switching power supplies.
- What is the operating temperature range of the UC2875DWP? The operating temperature range is -25°C to 85°C.
- What is the maximum switching frequency of the UC2875DWP? The device can operate at switching frequencies up to 1 MHz.
- What type of output does the UC2875DWP have? The UC2875DWP has four 2A totem pole outputs.
- What is the undervoltage lockout (UVLO) threshold of the UC2875DWP? The UVLO threshold is 10.75V with 1.5V hysteresis.
- Does the UC2875DWP support soft-start control? Yes, the UC2875DWP includes soft-start control.
- How does the over-current protection work in the UC2875DWP? The over-current protection is latched with full-cycle restart.
- What is the bandwidth of the error amplifier in the UC2875DWP? The error amplifier bandwidth exceeds 7 MHz.
- What is the startup current of the UC2875DWP? The startup current is 150 µA.
- Is the UC2875DWP still in production? No, the UC2875DWP is no longer in production.
