UC3843AN Current-mode PWM controller, 1-fold, 7.6 ... 30 V, DIP-8

UCx84xA Current-Mode PWM Controller

Description The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control currentmode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5 mA, oscillator discharge is trimmed to 8.3 mA, and during UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

Features - Optimized for Off-Line and DC-DC Converters - Low Start-Up Current (- Trimmed Oscillator Discharge Current - 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 - Create a Custom Design Using the UCx84xA With the WEBENCH® Power Designer

Applications - Switch Mode Power Supplies (SMPS) - DC-DC Converters - Power Modules - Industrial PSU - Battery Operated PSU