Overview
The UC2825DW, produced by Unitrode (now part of Texas Instruments), is an enhanced 30V, 1.5A double-ended 1MHz PWM (Pulse Width Modulation) controller. This IC is optimized for high-frequency switched-mode power supply applications, offering a range of features that make it suitable for both voltage and current mode topologies. The device is designed to minimize propagation delays and maximize bandwidth and slew rate of the error amplifier, ensuring efficient and reliable operation.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (DW) - 16 pins |
| Operating Temperature Range (°C) | -40 to 85 |
| Supply Voltage (V) | Up to 30V |
| Switching Frequency | Up to 1MHz |
| Propagation Delay to Output | 50ns |
| Output Current (Peak) | 1.5A |
| Duty Cycle Range | 0 to 80% |
| Under-Voltage Lockout (UVLO) | 9.2V/8.4V with 800mV hysteresis |
| Start-Up Current | 1.1mA |
Key Features
- Compatible with Voltage or Current Mode Topologies
- Practical Operation Switching Frequencies to 1MHz
- 50ns Propagation Delay to Output
- High Current Dual Totem Pole Outputs (1.5A Peak)
- Wide Bandwidth Error Amplifier
- Fully Latched Logic with Double Pulse Suppression
- Pulse-by-Pulse Current Limiting
- Soft Start / Max. Duty Cycle Control
- Under-Voltage Lockout with Hysteresis
- Low Start Up Current (1.1mA)
Applications
The UC2825DW is designed for use in high-frequency switched-mode power supply applications. It is particularly suitable for systems requiring high efficiency, reliability, and precision control. Common applications include DC-DC converters, power supplies for electronic devices, and other high-frequency switching circuits.
Q & A
- What is the maximum switching frequency of the UC2825DW?
The UC2825DW can operate at switching frequencies up to 1MHz. - What is the peak output current of the UC2825DW?
The peak output current is 1.5A. - What is the operating temperature range of the UC2825DW?
The operating temperature range is -40°C to 85°C. - Is the UC2825DW compatible with both voltage and current mode topologies?
Yes, it is compatible with both voltage and current mode topologies. - What is the propagation delay to output of the UC2825DW?
The propagation delay to output is 50ns. - What is the under-voltage lockout (UVLO) threshold of the UC2825DW?
The UVLO threshold is 9.2V/8.4V with 800mV of hysteresis. - What is the start-up current of the UC2825DW?
The start-up current is 1.1mA. - Does the UC2825DW have pulse-by-pulse current limiting?
Yes, it does have pulse-by-pulse current limiting. - Is the logic of the UC2825DW fully latched?
Yes, the logic is fully latched with double pulse suppression. - What is the duty cycle range of the UC2825DW?
The duty cycle range is 0 to 80%.
