UTC1869

UTC1869 HIGH FREQUENCY PWM CONTROLLER LINEAR INTEGRATED CIRCUIT DESCRIPTION The UTC1869 is a high frequency PWM controller integrates required functions for boost conversion in a small SOP-8 package . A low 0.21V feedback voltage make the UTC1869 be an ideal contoller for LED backlight supplies . FEATURES * Voltage Mode PWM Controller * Low 0.21V reference Voltage * 180KHz Operation * Deadtime Control * Internal UVLO(Under Voltage Lock Out) * Limited Output Duty Cycle * Low Shutdown current * SOP-8 Package * Soft Setup ABSOLUTE MAXIMUM RATINGS (Unless otherwise noted ,all is over operating free-air temperature Range) Characteristic Value Supply Voltage 7-40 Input Voltage -0.3 Vcc+0.3 Operating Ambit Temperature Range Extreme Operating Ambient Temp 0 70 -40 85 Operating Junction Temperature Storage Temperature +150 -55 150 SOP-8 Unit V V °C °C °C °C RECOMMENDED OPERATING CONDITION Characteristic Value Supply Voltage 36 Operating Ambient Temperature 0 70 BLOCK DIAGRAM Unit V °C YOUWANG ELECTRONICS CO.LTD 1 2012.07.11 V1.6 UTC1869 PIN CONFIGURATIONS LINEAR INTEGRATED CIRCUIT PIN FUNCTIONS Pin No. Pin Name 1 IN 2 FB 3 DT 4 GND 5 OUT 6 VCC 7 EA 8 Vref Function Sampling signal input Feedback PWM input Deadtime Control GND PWM output Power supply Enable Internal 5V reference YOUWANG ELECTRONICS CO.LTD 2 2012.07.11 V1.6 UTC1869 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range,VCC=12V,Unless...