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AZ3843MM Datasheet(PDF) 6 Page - Advanced Analog Technology, Inc. |
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AZ3843MM Datasheet(HTML) 6 Page - Advanced Analog Technology, Inc. |
6 / 13 page CURRENT MODE PWM CONTROLLER AZ3842/3/4/5 Advanced Analog Circuits Data Sheet 6 March 2003 Rev: 1.0 Electrical Characteristics (Continued) Parameter Symbol Conditions Min Typ Max Unit Fall Time tF TJ=25oC, CL=1nF (Note 6) 50 150 ns UNDER -VOLTAGE LOCKOUT SECTION Start Threshold VTH(ST) AZ3842/AZ3844 14.5 15.5 16.5 V AZ3843/AZ3845 7.8 8.4 9.0 V Min. Operation Voltage (After Turn On) VOPR (Min.) AZ3842/AZ3844 8.5 10.0 11.5 V AZ3843/AZ3845 7.0 7.6 8.2 V PWM SECTION Max. Duty Cycle D(Max.) AZ3842/AZ3843 93 95 100 % D(Max.) AZ3844/AZ3845 46 48 50 % Min. Duty Cycle D(Min.) 0 % TOTAL STANDBY CURRENT SECTION Start-Up Current IST 0.6 1 mA Operating Supply Current ICC(OPR) Vpin3=Vpin2=0V 10 14 mA Zener Voltage VZ ICC=25mA 30 34 V OVER-TEMPERATURE PROTECT SECTION Shutdown Temperature TSHUT (Note 6) 165 oC Temperature Hysteresis THYS (Note 6) 25 oC A= , 0 ≤ Vpin3 ≤ 0.8V ∆VPin 3 Note 4: Parameters are tested at trip point of latch with Vpin2 = 0. Note 5: Here gain is defined as: ∆VPin 1 Note 6: These parameters, although guaranteed, are not 100% tested in production. Figure 4. Basic Test Circuit 1 2 8 7 AZ3842 3 45 6 VREF VCC OUTPUT GND RT/CT ISENSE VFB COMP VREF VCC OUTPUT GND 1K 1W CT 5k ISENSE ADJUST 1k ERROR AMP ADJUST 4.7k 100k 2N2222 4.7k RT 0.1 µf 0.1 µf A |
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