HIGH FREQUENCY PWM CONTROLLER
UTC1869
HIGH FREQUENCY PWM CONTROLLER
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
The UTC1869 is a high frequency PWM contro...
Description
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...
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