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AMC3843B Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers |
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AMC3843B Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers |
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4 / 10 page  AMC DOC. #: AMC3842B_C (LF) AMC3842B/43B March 2004 CURRENT MODE PWM CONTROLLER Copyright © 2002, ADD Microtech Corp. 4 www.addmtek.com RECOMMENDED OPERATING CONDITIONS Recommended Operating Conditions Parameter Symbol Min. Typ. Max. Units Supply Voltage VCC / VC 30 V VI,RT/CT Input Voltage VI,ISENSE/VFB 0 5.5 V Output Voltage VO, Output 0 30 V Supply Current ICC 25 mA Average Output Current IO 200 mA Reference Output Current IO(REF) -20 mA Timing Capacitor CT 1 nF Oscillator Frequency fOSC 100 500 KHz Operating Free-air Temperature TA 0 70 OC ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperature for AMC384XB with 0 OC ≤ TA ≤70 OC; V CC = 15V(note 6); RT = 10K;CT = 3.3nF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. AMC384XB Parameter Symbol Test Conditions Min. Typ. Max. Units Reference Section Reference output Voltage VREF TJ = 25 OC, IREF = 1mA 4.9 5.0 5.1 V Line Regulation 12V ≤ V CC ≤ 25V,TJ = 25 OC 6 20 mV Load Regulation 1mA ≤ I REF ≤ 20mA 6 25 mV Short Ciruit Output Current ISC TJ = 25 OC -30 -100 -180 mA Oscillator Section Oscillation Frequency f TJ = 25 OC 52 KHz Frequency Change with Voltage 12V ≤ V CC ≤ 25V 0.2 1.0 % Frequency Change with Temperature (note 7) TMIN ≤ TA ≤ TMAX 5 % Peak-to-peak Amplitude At RT/CT VOSC 1.7 V Current Sense Section Gain (note 8 & 9) AVOL 2.85 3.00 3.15 V/V Maximum Input Signal (note 8) VI(MAX) COMP = 5V 0.9 1.0 1.1 V Power Supply Rejection Ratio (note 8) PSRR 12V ≤ V CC ≤ 25V (note 8) 70 dB Input Bias Current IBIAS -3.0 -10 µA |
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