Overview
The UC2843D8TRG4 is a current-mode PWM controller from Texas Instruments, designed for use in off-line and DC-to-DC converters. This component is part of the UCx84x family, which provides the necessary features to implement fixed-frequency current-mode control schemes with a minimal number of external components. The UC2843D8TRG4 is optimized for applications requiring high efficiency and reliability, with features such as low start-up current, automatic feedforward compensation, and pulse-by-pulse current limiting.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage (VCC) | Up to 30 | V |
| Output Current | ±1 | A |
| Oscillator Frequency | 100 kHz to 500 kHz | kHz |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | SOIC (D) 8-pin | |
| Undervoltage Lockout (UVLO) | 8.4V/7.6V with hysteresis | V |
| Maximum Duty Cycle | Up to 100% | % |
| Reference Voltage (VREF) | 5 V ± 0.1 V | V |
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
- Switching regulators of any polarity
- Transformer-coupled DC-DC converters
- Off-line power supplies
- DC-DC converters requiring high efficiency and reliability
Q & A
- What is the operating voltage range of the UC2843D8TRG4?
The UC2843D8TRG4 operates with a VCC up to 30 V.
- What is the maximum output current of the UC2843D8TRG4?
The maximum output current is ±1 A.
- What is the oscillator frequency range of the UC2843D8TRG4?
The oscillator frequency range is from 100 kHz to 500 kHz.
- What is the operating temperature range of the UC2843D8TRG4?
The operating temperature range is from -40°C to 85°C.
- What type of package does the UC2843D8TRG4 come in?
The UC2843D8TRG4 comes in an SOIC (D) 8-pin package.
- What are the undervoltage lockout (UVLO) thresholds for the UC2843D8TRG4?
The UVLO thresholds are 8.4V for turn-on and 7.6V for turn-off with hysteresis.
- What is the maximum duty cycle of the UC2843D8TRG4?
The maximum duty cycle is up to 100%.
- What is the reference voltage (VREF) of the UC2843D8TRG4?
The reference voltage is 5 V ± 0.1 V.
- What are some key features of the UC2843D8TRG4?
Key features include low start-up current, automatic feedforward compensation, pulse-by-pulse current limiting, and a high-current totem-pole output.
- What types of applications is the UC2843D8TRG4 suitable for?
The UC2843D8TRG4 is suitable for switching regulators, transformer-coupled DC-DC converters, off-line power supplies, and other DC-DC converters requiring high efficiency and reliability.
