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AP3844CP Datasheet(PDF) 7 Page - BCD Semiconductor Manufacturing Limited |
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AP3844CP Datasheet(HTML) 7 Page - BCD Semiconductor Manufacturing Limited |
7 / 13 page CURRENT MODE PWM CONTROLLER AP384XC Data Sheet 7 Sep. 2006 Rev. 1. 1 BCD Semiconductor Manufacturing Limited Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Unit UNDER -VOLTAGE LOCKOUT SECTION Start Threshold VTH(ST) AP3842C/AP3844C 15 16 17 V AP3843C/AP3845C 7.8 8.4 9.0 V Min. Operation Voltage (After Turn On) VOPR (Min.) AP3842C/AP3844C 8.5 10.0 11.5 V AP3843C/AP3845C 7.0 7.6 8.2 V PWM SECTION Max. Duty Cycle D(Max.) AP3842C/AP3843C 95 97 100 % D(Max.) AP3844C/AP3845C 46 48 50 % Min. Duty Cycle D(Min.) 0 % TOTAL STANDBY CURRENT SECTION Start-Up Current IST 50 80 µA Operating Supply Current ICC(OPR) Vpin3=Vpin2=0V 8 12 mA Zener Voltage VZ ICC=25mA 30 34 V OVER-TEMPERATURE PROTECT SECTION Shutdown Temperature TSHUT (Note 6) 155 oC Temperature Hysteresis THYS (Note 6) 25 oC Figure 4. Basic Test Circuit A= , 0 ≤ Vpin3 ≤ 0.8V ∆VPin 3 Note 5: Here gain is defined as: ∆VPin 1 Note 6: These parameters, although guaranteed, are not 100% tested in production. Note 7: This parameter is measured with RT=10kΩ to VREF, it contributes 0.3mA of current to the measured value. So the total current flowing into the CT pin will be 0.3mA higher than the measured value approximately. Note 4: Parameters are tested at trip point of latch with Vpin2 = 0. 1 2 8 7 AP384XC 3 45 6 V REF V CC OUTPUT GND R T/CT I SENSE V FB COMP V REF V CC OUTPUT GND 1K 1W C T 5k I SENSE ADJUST 1k ERROR AMP ADJUST 4.7k 100k 2N2222 4.7k R T 0.1 µF 0.1 µF A |
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