Overview
The UC2843D8TR is a current-mode PWM controller produced by Texas Instruments. It is part of the UCx84x series of control integrated circuits, designed to implement off-line or DC-to-DC fixed-frequency current-mode control schemes with a minimum number of external components. This device is optimized for both off-line and DC-to-DC converters and offers a range of features that enhance its performance and reliability.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D) with 8 pins |
| Operating Temperature Range | -40°C to 85°C |
| Maximum Voltage | 30 V |
| Maximum Current | 1 A |
| Operating Frequency | Up to 500 kHz |
| Start-up Current | < 1 mA |
| UVLO Thresholds | 8.4 V / 7.6 V |
| Maximum Duty Cycle | 100% |
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
Applications
The UC2843D8TR is suitable for a variety of power supply applications, including off-line power supplies and DC-to-DC converters. It is particularly useful in designs where high efficiency, low start-up current, and robust control over the output are required. The device's ability to operate over a wide temperature range and its high-frequency operation make it a versatile choice for many power management systems.
Q & A
- What is the operating temperature range of the UC2843D8TR?
The operating temperature range is -40°C to 85°C. - What is the maximum operating frequency of the UC2843D8TR?
The maximum operating frequency is up to 500 kHz. - What is the start-up current of the UC2843D8TR?
The start-up current is less than 1 mA. - What are the UVLO thresholds for the UC2843D8TR?
The UVLO thresholds are 8.4 V and 7.6 V. - What is the maximum duty cycle of the UC2843D8TR?
The maximum duty cycle is 100%. - What type of output stage does the UC2843D8TR have?
The UC2843D8TR has a high-current totem-pole output stage designed to source or sink high-peak current. - Is the UC2843D8TR suitable for DC-to-DC converters?
Yes, the UC2843D8TR is optimized for both off-line and DC-to-DC converters. - What is the package type of the UC2843D8TR?
The package type is SOIC (D) with 8 pins. - Does the UC2843D8TR have automatic feedforward compensation?
Yes, the UC2843D8TR includes automatic feedforward compensation. - What is the maximum voltage rating of the UC2843D8TR?
The maximum voltage rating is 30 V.
