UC2845AJ

UC1842A/3A/4A/5A UC2842A/3A/4A/5A UC3842A/3A/4A/5A Current Mode PWM Controller FEATURES • Optimized for Off-line and DC to DC Converters • Low Start Up Current ( Description > Features > Datasheets > Pricing/Samples/Availability > Application Notes > Applications Parameter Name UC3844A Shutdown No Output Type Single, Totem Pole Output Current (mA) +/-1000 Frequency (max) (kHz) 500 Pulse - by - Pulse Isense Yes Reference Voltage (V) 5 Vref tol (%) 1 Startup Current (uA) 300 Duty Cycle (max) (%) 50 Operating Supply Current (mA) 11 Operating Supply (max) (V) 30 Operating Supply (min) (V) 10 PWM Outputs (#) 1 Error Amplifier GBW (mHz) 1 Description The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V. The difference between members of this family are shown in the table below. 2 of 3 Features l l l l l l l l l l l l Optimized For Off-line and DC To DC Converters Low Start Up Current (