Overview
The UC2844N is a high-performance, fixed-frequency pulse-width modulation (PWM) controller produced by Texas Instruments. This component is designed for use in switch-mode power supplies and offers a wide range of features that make it suitable for various power conversion applications. The UC2844N is part of the UCx84x series, which provides the necessary features to implement off-line or DC-to-DC fixed-frequency current-mode control schemes with a minimum number of external components.
Key Specifications
| Specification | Value |
|---|---|
| Package | PDIP (P) with 8 pins |
| Operating Temperature Range | -40°C to 85°C |
| Switching Frequency | Up to 500kHz |
| Maximum Duty Cycle | 48% |
| Supply Voltage Range | 12V to 28V |
| Undervoltage Lockout (UVLO) | 16V/10V with hysteresis |
| Start-up Current | < 1mA |
Key Features
- Optimized for off-line and DC-to-DC converters
- Low start-up current (< 1mA)
- Automatic feedforward compensation
- Pulse-by-pulse current limiting
- Enhanced load-response characteristics
- Undervoltage lockout with hysteresis
- Double-pulse suppression
- High-current totem-pole output
- Internally trimmed bandgap reference
- Error amplifier with low output resistance
- Supports step-up, step-down, and step-up/step-down topologies
- Positive output configuration with isolation capability
- Wide input voltage range for flexibility in different applications
Applications
- Switch-mode power supplies
- Offline power converters
- Industrial equipment
- Consumer electronics
- Telecommunications equipment
Q & A
- What is the UC2844N used for?
The UC2844N is used in switch-mode power supplies and various power conversion applications. - What is the operating temperature range of the UC2844N?
The operating temperature range is -40°C to 85°C. - What is the maximum switching frequency of the UC2844N?
The maximum switching frequency is up to 500kHz. - What is the maximum duty cycle of the UC2844N?
The maximum duty cycle is 48%. - What is the supply voltage range for the UC2844N?
The supply voltage range is 12V to 28V. - Does the UC2844N support synchronous rectification?
No, the UC2844N does not support synchronous rectification. - What type of output stage does the UC2844N have?
The UC2844N has a high-current totem-pole output stage designed to source or sink high-peak current. - Is the UC2844N suitable for industrial equipment?
Yes, the UC2844N is suitable for industrial equipment among other applications. - What is the start-up current of the UC2844N?
The start-up current is less than 1mA. - Does the UC2844N have undervoltage lockout (UVLO) with hysteresis?
Yes, the UC2844N has UVLO with hysteresis.
