Overview
The UC3842D8TR 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 of control integrated circuits, which provide the necessary features to implement fixed-frequency current-mode control schemes with a minimum number of external components. The UC3842D8TR operates within a temperature range of 0°C to 70°C and is packaged in an 8-pin SOIC (D) package.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | 0 to 70 | °C |
| Maximum Duty Cycle | Up to 100% | - |
| Oscillator Frequency | 100 kHz to 500 kHz | - |
| Start-up Current | < 1 mA | - |
| Output Drive Current | ±1 A | - |
| Reference Voltage | 4.9 to 5.1 V | - |
| Junction Temperature | 150 | °C |
| Storage Temperature | –65 to 150 | °C |
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
- Up to 500 kHz operation
- Error amplifier with low output resistance
Applications
- Switching regulators of any polarity
- Transformer-coupled DC-DC converters
- Off-line power supplies
- DC-DC converters
Q & A
- What is the operating temperature range of the UC3842D8TR?
The UC3842D8TR operates within a temperature range of 0°C to 70°C. - What is the maximum duty cycle of the UC3842D8TR?
The maximum duty cycle is up to 100%. - What is the oscillator frequency range of the UC3842D8TR?
The oscillator frequency range is from 100 kHz to 500 kHz. - What is the start-up current of the UC3842D8TR?
The start-up current is less than 1 mA. - What type of output stage does the UC3842D8TR have?
The UC3842D8TR has a high-current totem-pole output stage. - What is the reference voltage of the UC3842D8TR?
The reference voltage is between 4.9 V and 5.1 V. - What are the key applications of the UC3842D8TR?
The key applications include switching regulators, transformer-coupled DC-DC converters, off-line power supplies, and DC-DC converters. - What package type is the UC3842D8TR available in?
The UC3842D8TR is available in an 8-pin SOIC (D) package. - What is the junction temperature limit of the UC3842D8TR?
The junction temperature limit is 150°C. - Does the UC3842D8TR have undervoltage lockout (UVLO) with hysteresis?
Yes, the UC3842D8TR features undervoltage lockout with hysteresis.
