Overview
The UC2844P, produced by Texas Instruments, is a high-performance, fixed-frequency pulse-width modulation (PWM) controller. It is designed for use in switch-mode power supplies, particularly for off-line and DC-to-DC converter applications. This controller offers a cost-effective solution with minimal external components, making it versatile for various power conversion needs.
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Package | SOIC-14 | - |
| Pins | 14 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Supply Voltage Range | 12 to 28 | V |
| Switching Frequency | Up to 500 kHz | - |
| Maximum Duty Cycle | 48% | - |
| Output Current (Source or Sink) | 1.0 A | - |
| Reference Output Voltage | 4.95 to 5.05 V | - |
| Storage Temperature Range | -65 to 150 | °C |
Key Features
- Optimized for off-line and DC-to-DC converters
- Low start-up current (< 1 mA)
- 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 boost, buck, flyback, and forward topologies
- Single-output design with single-phase operation
Applications
- Switch-mode power supplies
- Off-line power converters
- Industrial equipment
- Consumer electronics
- Telecommunications equipment
Q & A
- What is the UC2844P used for?
The UC2844P is used in switch-mode power supplies, particularly for off-line and DC-to-DC converter applications.
- What is the operating temperature range of the UC2844P?
The operating temperature range is -40°C to 85°C.
- What is the maximum switching frequency of the UC2844P?
The maximum switching frequency is up to 500 kHz.
- What are the supported topologies by the UC2844P?
The UC2844P supports boost, buck, flyback, and forward topologies.
- What is the maximum duty cycle of the UC2844P?
The maximum duty cycle is 48%.
- Does the UC2844P support synchronous rectification?
No, the UC2844P does not support synchronous rectification.
- What is the reference output voltage of the UC2844P?
The reference output voltage is between 4.95 V and 5.05 V.
- What protective features does the UC2844P have?
The UC2844P includes undervoltage lockout with hysteresis, cycle-by-cycle current limiting, and double-pulse suppression.
- What package options are available for the UC2844P?
The UC2844P is available in an 8-pin dual-in-line and a 14-pin SOIC package.
- Is the UC2844P a cost-effective solution?
