Overview
The UC2825N/80709, produced by Unitrode (now part of Texas Instruments), is an enhanced 30V, 1.5A double-ended 1MHz PWM (Pulse Width Modulation) controller. This device is optimized for high-frequency switched-mode power supply applications, offering a range of features that enhance its performance and reliability. It is particularly suited for use in either current-mode or voltage-mode systems, with the capability for input voltage feed-forward.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 30V |
| Peak Output Current | 1.5A |
| Switching Frequency | Up to 1MHz |
| Under-Voltage Lockout (UVLO) | 9.2V/8.4V |
| Maximum Duty Cycle | 80% |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | PDIP (N) with 16 pins |
| Propagation Delay to Output | 50ns |
Key Features
- Compatible with Voltage or Current Mode Topologies
- Practical Operation Switching Frequencies to 1MHz
- 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 UC2825N/80709 is designed for use in high-frequency switched-mode power supply applications, including but not limited to:
- Boost, Flyback, and Forward converters
- Step-Up and Step-Up/Step-Down power supplies
- High-efficiency power supply systems requiring precise control and reliability
Q & A
- What is the maximum operating voltage of the UC2825N/80709?
The maximum operating voltage is 30V. - What is the peak output current of the UC2825N/80709?
The peak output current is 1.5A. - What is the switching frequency range of the UC2825N/80709?
The device can operate up to 1MHz. - What are the under-voltage lockout (UVLO) thresholds for the UC2825N/80709?
The UVLO thresholds are 9.2V and 8.4V. - What is the maximum duty cycle of the UC2825N/80709?
The maximum duty cycle is 80%. - What is the operating temperature range of the UC2825N/80709?
The operating temperature range is -40°C to 85°C. - What type of package does the UC2825N/80709 come in?
The device comes in a PDIP (N) package with 16 pins. - What is the propagation delay to the output of the UC2825N/80709?
The propagation delay to the output is 50ns. - Does the UC2825N/80709 support both voltage and current mode topologies?
Yes, it supports both voltage and current mode topologies. - What protection features does the UC2825N/80709 include?
The device includes features such as pulse-by-pulse current limiting, soft start, and under-voltage lockout with hysteresis.
