Overview
The UC2842BDR2G is a high-performance fixed frequency current mode controller produced by onsemi. It is part of the UC2842B series, designed for off-line and DC-DC converter applications. This integrated circuit offers a cost-effective solution with minimal external components, making it ideal for a variety of power supply designs. The UC2842BDR2G features a trimmed oscillator for precise duty cycle control, a temperature-compensated reference, a high-gain error amplifier, a current sensing comparator, and a high-current totem pole output suitable for driving power MOSFETs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Oscillator Frequency | 52 kHz (typical) | kHz |
| Maximum Duty Cycle | 94% (maximum) | % |
| Reference Output Voltage | 5.0 V (typical) | V |
| Input and Reference Undervoltage Lockout | 16 V (on), 10 V (off) for UC2842B | V |
| Output Current (Source/Sink) | Up to 1.0 A | A |
| Power Supply Current (Startup) | 0.3 mA to 12 mA | mA |
| Package Type | SOIC-14 | |
| Operating Temperature Range | -25°C to +85°C | °C |
Key Features
- Trimmed oscillator for precise duty cycle control
- Temperature-compensated reference
- High-gain error amplifier
- Current sensing comparator
- High-current totem pole output for driving power MOSFETs
- Input and reference undervoltage lockouts with hysteresis
- Cycle-by-cycle current limiting
- Programmable output deadtime
- Latch for single pulse metering
- Low startup and operating current
- Pb-free packages available
Applications
The UC2842BDR2G is specifically designed for off-line and DC-DC converter applications. It is suitable for a wide range of power supply designs, including:
- Off-line power supplies
- DC-DC converters
- Flyback converters
- Forward converters
- Other high-performance power conversion applications
Q & A
- What is the typical oscillator frequency of the UC2842BDR2G?
The typical oscillator frequency is 52 kHz.
- What is the maximum duty cycle of the UC2842BDR2G?
The maximum duty cycle is 94%.
- What is the reference output voltage of the UC2842BDR2G?
The reference output voltage is typically 5.0 V.
- What are the undervoltage lockout thresholds for the UC2842BDR2G?
The undervoltage lockout thresholds are 16 V (on) and 10 V (off).
- What is the maximum output current of the UC2842BDR2G?
The maximum output current is up to 1.0 A.
- What is the package type of the UC2842BDR2G?
The package type is SOIC-14.
- What is the operating temperature range of the UC2842BDR2G?
The operating temperature range is -25°C to +85°C.
- Does the UC2842BDR2G have protective features?
- Is the UC2842BDR2G Pb-free?
- What are some common applications of the UC2842BDR2G?
