UC3844B
Description
UC3842B/3B/4B/5B,UC2842B/3B Package outline The UC3842B/3B/4B/5B, series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components.
Key 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 Vref 8(14) RT/CT 4(7) Voltage Feedback Input 2(3) Output Compensation 1(1) VCC 7(12) R
- 0V Reference VCC Undervoltage Lockout R Vref Undervoltage Lockout Oscillator + Error Amplifier Latching PWM Gnd 5(9) Pin numbers in parenthesis are for the D suffix SO-14 pa
Representative UC3844B image (package may vary by manufacturer)
