Overview
The UC3843DTR is a single-ended current-mode Pulse Width Modulation (PWM) controller produced by Texas Instruments. This integrated circuit is part of the UCx84x family and is optimized for off-line and DC-to-DC converters. It features a range of internal circuits that enable efficient and reliable power conversion with a minimum number of external components. The UC3843DTR operates within a temperature range of 0°C to 70°C and is packaged in a 14-pin SOIC (D) package.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) with 14 pins |
| Operating Temperature Range (°C) | 0 to 70 |
| Frequency | Up to 500kHz |
| Undervoltage Lockout (UVLO) | 8.4V/7.6V |
| Maximum Duty Cycle | 100% |
| Start-up Current | < 1mA |
| Output Stage | High-current totem-pole output |
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
Applications
The UC3843DTR is suitable for a variety of power conversion applications, including off-line power supplies and DC-to-DC converters. It is particularly useful in designs where high efficiency, reliability, and minimal external component count are required. The device's ability to operate at frequencies up to 500kHz makes it ideal for high-frequency power conversion systems.
Q & A
- What is the operating temperature range of the UC3843DTR?
The UC3843DTR operates within a temperature range of 0°C to 70°C. - What is the package type and pin count of the UC3843DTR?
The UC3843DTR is packaged in a 14-pin SOIC (D) package. - What is the maximum operating frequency of the UC3843DTR?
The UC3843DTR can operate at frequencies up to 500kHz. - What is the undervoltage lockout (UVLO) threshold for the UC3843DTR?
The UVLO thresholds are 8.4V and 7.6V. - What is the maximum duty cycle of the UC3843DTR?
The maximum duty cycle is 100%. - What is the start-up current of the UC3843DTR?
The start-up current is less than 1mA. - What type of output stage does the UC3843DTR have?
The UC3843DTR has a high-current totem-pole output stage. - What are some key features of the UC3843DTR?
Key features include automatic feedforward compensation, pulse-by-pulse current limiting, enhanced load-response characteristics, and an internally trimmed bandgap reference. - In what types of applications is the UC3843DTR commonly used?
The UC3843DTR is commonly used in off-line power supplies and DC-to-DC converters. - Why is the UC3843DTR preferred in high-frequency power conversion systems?
The UC3843DTR is preferred due to its ability to operate at frequencies up to 500kHz, making it ideal for high-frequency power conversion systems.
