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| 45V Input Buck Converter 3ch/2ch IC with Power MOSFET a is our message FA7726/7730 3ch-IC Brock Diagram and application example 3ch-IC Brock Diagram and application example RT REG 3 FB1 IN1VIN1 FB2 IN2VIN2 FB3 IN3VIN3 E.A.3 PW M Comp.3 Features Features 1. Wide Input Voltage Range : 10 to 45V 2. 75 to 85% High Efficiency is achieved by using internal power MOSFETs with synchronized rectifier. 3. Low Operating Current : 3.5mA 4. Protection : Current Limit of power MOSFET, Each channel soft start, Timer Latched Protection for Short Current and Over Temperature OSC VREG5 3V VREG3 VREF 5V REG 5 Vin = 10 to 45V VCC E.A.1 PW M Com p.1 PVCC1 Dead Time P 1V Current Lim it OUT1 N VO1(5V/ 1.2A) VIN1 pin PGND1 PVCC2 E.A.2 PW M Comp.2 UVLO Dead Time 1V Current Limit P OUT2 N VO2(3.3V/ 1.2A) VIN2 pin PG ND2 PVCC3 UVLO * Dead Time 1V Current Limit P OUT3 N VO3(1.5V/ 1.2A VIN3 pin PGND3 Brief Specification Brief Specification Characteristics 3ch FA7726F 2ch FA7730F 10 to 45V 5.0V,1.5V Selectable 5.0V/1.2A 1.2A Output 3.3V/1.2A 1.5V/1.2A 3.3V/1.2A 40k to 200kHz -20 to 150 degree UVLO CS1 ch1 CS2 CS3 Soft Start UVLO ch2 ch3 ch1 Current Lim it ch2 ch3 Item Input Voltage Range CP UVLO_ L UVLO_ H FB Detection S R Q SCP DC Output Voltage / Current Switching Frequency OTP(OHP) OHP G ND Junction Temperature 45V Input Buck Converter 3ch/2ch IC with Power MOSFET a is our message FA7726/7730 90 DC-to-DC Converter Data DC-to-DC Converter Data DC/DC 3 Outputs Condition FA7726 Efficiency Input Voltage vs. Efficiency 5V/1.2A 1.5V/0.8A 3.3V/0.8A fosc=40kHz fosc=60kHz fosc=80kHz fosc=100kHz fosc=120kHz 85 80 Efficiency [%] fosc=140kHz fosc=160kHz fosc=180kHz fosc=200kHz 75 70 65 60 5 10 15 20 25 30 35 40 45 50 55 DC input voltage [V] |
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