onsemi UC3842B
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and DC−DC converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.- Min Voltage : 10V
- Max Voltage : 30V
- Channels : 1
- Max Operating Temp : 70°C
- Min Operating Temp : 0°C
Source:
Octopart
| Part No. | UC3842B |
|---|---|
| Datasheet | UC3842B Download |
| Manufacturer |  onsemi |
| Description | HIGH-PERFORMANCE CONTROLLER |
| Buy | Stock & Price |
FEATURES
● Trimmed Oscillator for Precise Frequency Control● Oscillator Frequency Guaranteed at 250 kHz
● Current Mode Operation to 500 kHz
● Automatic Feed Forward Compensation
● Latching PWM for Cycle−By−Cycle Current Limiting
● Internally Trimmed Reference with Undervoltage Lockout
● High Current Totem Pole Output
● Undervoltage Lockout with Hysteresis
● Low Startup and Operating Current
● This is a Pb−Free and Halide−Free Device VCC 7(12) 14 1 8 1 SOIC−14 D SUFFIX CASE 751A SOIC−8 D1 SUFFIX CASE 751 PIN CONNECTIONS Compensation 1 Voltage Feedback 2 Current Sense 3 RT/CT 4 8 Vref 7 VCC 6 Output 5 GND (Top View) Compensation 1 NC 2 Voltage Feedback 3 NC 4 Current Sense 5 NC 6 RT/CT 7 14 Vref 13 NC 12 VCC 11 VC 10 Output 9 GND 8 Power Ground (Top View) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 17 of this data sheet. DEVICE MARKING INFORMATION See general marking information in the device marking section on page 19 of this data sheet.
