Overview
The UC2842BD1R2G is a high-performance fixed frequency current mode controller produced by onsemi. It is part of the UC2842B and UC3842B series, designed specifically 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.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bias and Driver Voltages (VCC, VC) | 30 | V |
| Total Power Supply and Zener Current (ICC + IZ) | 30 | mA |
| Output Current, Source or Sink (IO) | 1.0 | A |
| Output Energy (Capacitive Load per Cycle) | 5.0 | μJ |
| Reference Output Voltage (Vref) | 4.95 - 5.05 | V |
| Line Regulation (VCC = 12 V to 25 V) | -2.0 to 20 | mV |
| Load Regulation (IO = 1.0 mA to 20 mA) | -3.0 to 25 | mV |
| Temperature Stability (TS) | -0.2 | mV/°C |
| Output Voltage Low State (ISink = 20 mA) | 0.1 - 1.6 | V |
| Output Voltage High State (ISource = 20 mA) | 12 - 13.5 | V |
| Output Voltage Rise Time (CL = 1.0 nF, TJ = 25°C) | 50 - 150 | ns |
| Output Voltage Fall Time (CL = 1.0 nF, TJ = 25°C) | 50 - 150 | ns |
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
- Protective features including input and reference undervoltage lockouts with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering
- Available in SOIC-8 package
Applications
The UC2842BD1R2G is suitable for various power supply applications, including off-line and DC-DC converters. It is particularly useful in designs requiring high performance, minimal external components, and robust protective features. Common applications include power supplies for consumer electronics, industrial equipment, and telecommunications devices.
Q & A
- What is the UC2842BD1R2G used for? The UC2842BD1R2G is a high-performance fixed frequency current mode controller used in off-line and DC-DC converter applications.
- What are the key features of the UC2842BD1R2G? Key features include a trimmed oscillator, temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem pole output.
- What are the protective features of the UC2842BD1R2G? Protective features include input and reference undervoltage lockouts with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.
- What is the maximum output current of the UC2842BD1R2G? The maximum output current is 1.0 A.
- What is the operating voltage range for the UC2842BD1R2G? The bias and driver voltages (VCC, VC) can operate up to 30 V.
- What package types are available for the UC2842BD1R2G? It is available in an SOIC-8 package.
- How is the oscillator frequency programmed in the UC2842BD1R2G? The oscillator frequency is programmed by the values chosen for the timing components RT and CT.
- What is the reference output voltage of the UC2842BD1R2G? The reference output voltage (Vref) is between 4.95 V and 5.05 V.
- What are the typical applications of the UC2842BD1R2G? Typical applications include power supplies for consumer electronics, industrial equipment, and telecommunications devices.
- What is the thermal resistance of the UC2842BD1R2G in an SOIC-8 package? The thermal resistance, junction-to-air, for the SOIC-8 package is specified in the datasheet but generally falls within the range of typical values for such packages.
