Overview
The UC2844AQD is a current-mode PWM controller produced by Texas Instruments. This device is part of the UC284xA family, which is designed to control current-mode or switched-mode power supplies. The UC2844AQD is particularly optimized for off-line and DC-DC converters, offering several enhanced features that improve performance and reliability.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Texas Instruments High-Performance Analog |
| Part Category | Other Semiconductors |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Nom | 15.0 V |
| Input Voltage-Min | 11.0 V |
| Input Voltage-Max | 25.0 V |
| Operating Temperature-Min | -40.0°C |
| Operating Temperature-Max | 85.0°C |
| Output Current-Max | 1.0 A |
| Switching Frequency-Max | 500.0 kHz |
| Package Type | SOIC-14 |
| Number of Terminals | 14 |
| Supply Current-Max (Isup) | 25.0 mA |
| Technology | BIPOLAR |
Key Features
- Low Start-Up Current (< 0.5 mA)
- Trimmed Oscillator Discharge Current
- Automatic Feed Forward Compensation
- Pulse-by-Pulse Current Limiting
- Enhanced Load Response Characteristics
- Undervoltage Lockout With Hysteresis
- Double Pulse Suppression
- High-Current Totem Pole Output
- Internally Trimmed Reference Voltage
Applications
The UC2844AQD is optimized for use in off-line and DC-DC converters. It is suitable for a variety of power supply applications, including:
- Switched-mode power supplies
- DC-DC converters
- Off-line power supplies
- High-reliability industrial and automotive systems
Q & A
- What is the maximum switching frequency of the UC2844AQD?
The maximum switching frequency of the UC2844AQD is 500 kHz.
- What is the typical start-up current of the UC2844AQD?
The start-up current of the UC2844AQD is less than 0.5 mA.
- What is the operating temperature range of the UC2844AQD?
The operating temperature range is from -40°C to 85°C.
- What type of control mode does the UC2844AQD use?
The UC2844AQD uses current-mode control.
- What is the maximum output current of the UC2844AQD?
The maximum output current is 1.0 A.
- What are the key features of the UC2844AQD?
The key features include low start-up current, trimmed oscillator discharge current, automatic feedforward compensation, pulse-by-pulse current limiting, and more.
- What type of package does the UC2844AQD come in?
The UC2844AQD comes in a SOIC-14 package.
- Is the UC2844AQD RoHS compliant?
- What are some common applications for the UC2844AQD?
- Does the UC2844AQD have undervoltage lockout (UVLO) protection?
