Overview
The UC2825DWTR is a high-speed PWM (Pulse Width Modulation) controller produced by Texas Instruments. This device is part of the UC1825 family of PWM control ICs, optimized for high-frequency switched-mode power supply applications. It is designed to operate in either voltage-mode or current-mode systems, with features that minimize propagation delays and maximize bandwidth and slew rate of the error amplifier.
The UC2825DWTR is packaged in a 16-pin SOIC (DW) package and operates over a temperature range of -40°C to 85°C. It is particularly suited for applications requiring high switching frequencies up to 1 MHz and features high current dual totem pole outputs, making it ideal for driving power MOSFETs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (DW) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Switching Frequency | Up to 1 MHz | - |
| Propagation Delay to Output | 50 ns | - |
| Peak Output Current | 1.5 A | - |
| Under-Voltage Lockout (UVLO) | 8.8 to 9.6 V | - |
| UVLO Hysteresis | 0.4 to 1.2 V | - |
| Start Up Current | 1.1 mA | - |
Key Features
- Compatible with voltage or current mode topologies
- Practical operation at switching frequencies up to 1 MHz
- 50 ns propagation delay to output
- High current dual totem pole outputs (1.5 A peak)
- Wide bandwidth error amplifier
- Fully latched logic with double pulse suppression
- Pulse-by-pulse current limiting
- Soft start / maximum duty cycle control
- Under-voltage lockout with hysteresis
- Low start-up current (1.1 mA)
Applications
The UC2825DWTR is suitable for a variety of high-frequency switched-mode power supply applications, including:
- Boost, flyback, forward, half-bridge, and push-pull topologies
- High-frequency DC-DC converters
- Power supplies requiring high efficiency and reliability
- Applications needing precise control over switching frequencies and duty cycles
Q & A
- What is the operating temperature range of the UC2825DWTR?
The UC2825DWTR operates over a temperature range of -40°C to 85°C.
- What is the maximum switching frequency of the UC2825DWTR?
The UC2825DWTR can operate at switching frequencies up to 1 MHz.
- What is the peak output current of the UC2825DWTR?
The UC2825DWTR has high current dual totem pole outputs with a peak current of 1.5 A.
- What is the under-voltage lockout (UVLO) threshold of the UC2825DWTR?
The UVLO threshold of the UC2825DWTR is between 8.8 V and 9.6 V with hysteresis.
- What is the start-up current of the UC2825DWTR?
The start-up current of the UC2825DWTR is 1.1 mA.
- Is the UC2825DWTR compatible with both voltage and current mode topologies?
- What type of logic does the UC2825DWTR use?
The UC2825DWTR uses fully latched logic with double pulse suppression.
- Does the UC2825DWTR have pulse-by-pulse current limiting?
- What is the package type of the UC2825DWTR?
The UC2825DWTR is packaged in a 16-pin SOIC (DW) package.
- What are some common applications of the UC2825DWTR?
The UC2825DWTR is commonly used in boost, flyback, forward, half-bridge, and push-pull topologies, as well as in high-frequency DC-DC converters and power supplies requiring high efficiency and reliability.
