Overview
The UC2844AD is a high-performance current-mode PWM controller from Texas Instruments, designed to optimize the control of off-line and DC-DC converters. This device is part of the UCx84xA family, which offers improved features over its predecessors. It is packaged in a 14-pin SOIC (D) package and operates over a temperature range of -40°C to 85°C. The UC2844AD is known for its low start-up current, trimmed oscillator discharge current, and automatic feedforward compensation, making it a reliable choice for various power supply applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC (D) | - |
| Number of Pins | 14 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Input Voltage (Nominal) | 15.0 | V |
| Input Voltage (Minimum) | 11.0 | V |
| Input Voltage (Maximum) | 25.0 | V |
| Output Current (Maximum) | 1.0 | A |
| Output Voltage (Nominal) | 5.0 | V |
| Switching Frequency (Maximum) | 500 kHz | - |
| Technology | Bipolar | - |
| UVLO (Undervoltage Lockout) | 16 V / 10 V | - |
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
- Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer
Applications
The UC2844AD is widely used in various power supply applications, including:
- Off-Line Power Supplies
- DC-DC Converters
- Switched-Mode Power Supplies
- High-Efficiency Power Conversion Systems
Q & A
- What is the operating temperature range of the UC2844AD?
The UC2844AD operates over a temperature range of -40°C to 85°C.
- What is the maximum switching frequency of the UC2844AD?
The maximum switching frequency is up to 500 kHz.
- What is the typical start-up current of the UC2844AD?
The start-up current is less than 0.5 mA.
- What type of technology is used in the UC2844AD?
The UC2844AD uses bipolar technology.
- What are the UVLO thresholds for the UC2844AD?
The UVLO thresholds are 16 V and 10 V.
- What is the maximum output current of the UC2844AD?
The maximum output current is 1.0 A.
- Is the UC2844AD RoHS compliant?
Yes, the UC2844AD is RoHS compliant.
- What package type is the UC2844AD available in?
The UC2844AD is available in a 14-pin SOIC (D) package.
- Does the UC2844AD support automatic feedforward compensation?
Yes, the UC2844AD supports automatic feedforward compensation.
- Can the UC2844AD be used for custom design with WEBENCH Power Designer?
Yes, the UC2844AD can be used to create custom designs with the WEBENCH Power Designer.
