Description
UC284XA UC384XA HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER NOT FOR NEW DESIGN 1 .
PThe UC384xA family of control ICs provides the
necessary features to implement off-line or DC to
teDC fixed frequency current mode control schemes le.
Features
* Figure 1. Package
* TRIMMED OSCILLATOR DISCHARGE
CURRENT
* CURRENT MODE OPERATION TO 500kHz
AUTOMATIC FEED FORWARD COMPENSATION
DIP-8
SO-8
* LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING
Table 1. Order Codes
* INTERNALLY TRIMMED REFERENCE WITH
Part Number
Package
UNDE
Applications
* The corresponding thresholds for the UC3843A and UC3845A are 8.5 V and 7.9V. The UC3842A and UC3843A can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC3844A and UC3845A by the addition of an internal toggle flip flop which blanks the output off every oth
