Overview
The UC2844AD8TR is a current-mode PWM (Pulse Width Modulation) controller produced by Texas Instruments. It is part of the UCx84xA family, which is an improved version of the UCx84x family, offering enhanced features for controlling current-mode or switched-mode power supplies. This controller is optimized for off-line and DC-DC converters, making it a versatile component for various power supply applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | UC2844AD8TR |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage (Vcc/Vdd) | 10 V ~ 30 V |
| Duty Cycle | 50% |
| Switching Frequency | Up to 500kHz |
| Startup Current | < 0.5mA |
| Oscillator Discharge Current | Trimmed to 8.3mA |
| UVLO (Undervoltage Lockout) | 16V/10V with Hysteresis |
| Output Stage | High-Current Totem Pole Output |
| Mounting Type | Surface Mount |
Key Features
- Optimized for Off-Line and DC-DC Converters
- Low Start-Up Current (< 0.5mA)
- Trimmed Oscillator Discharge Current
- 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
- Up to 500kHz Operation
Applications
The UC2844AD8TR is suitable for a variety of power supply applications, including:
- Off-Line Power Supplies
- DC-DC Converters
- Boost, Buck, Flyback, and Forward Converters
Q & A
- What is the UC2844AD8TR used for?
The UC2844AD8TR is used as a current-mode PWM controller for off-line and DC-DC converters.
- What is the operating temperature range of the UC2844AD8TR?
The operating temperature range is -40°C to 85°C.
- What is the supply voltage range for the UC2844AD8TR?
The supply voltage range is 10 V to 30 V.
- What is the maximum switching frequency of the UC2844AD8TR?
The maximum switching frequency is up to 500kHz.
- Does the UC2844AD8TR have undervoltage lockout (UVLO) protection?
- What is the startup current of the UC2844AD8TR?
The startup current is less than 0.5mA.
- What type of output stage does the UC2844AD8TR have?
The UC2844AD8TR has a high-current totem pole output stage.
- Is the UC2844AD8TR RoHS compliant?
- What package type is the UC2844AD8TR available in?
The UC2844AD8TR is available in an 8-SOIC package.
- Can the UC2844AD8TR be used in surface mount applications?
