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UC3843BVNG датащи(PDF) 4 Page - ON Semiconductor |
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UC3843BVNG датащи(HTML) 4 Page - ON Semiconductor |
4 / 22 page UC3842B, UC3843B, UC2842B, UC2843B http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 7], RT = 10 k, CT = 3.3 nF. For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies [Note 8], unless otherwise noted.) UC284XB, UC2843D UC384XB, XBV Characteristics Symbol Min Typ Max Min Typ Max Unit CURRENT SENSE SECTION Current Sense Input Voltage Gain (Notes 5 and 6) UC2843D, UC284XB, UC384XB UC384XBV AV 2.85 − 3.0 − 3.15 − 2.85 2.85 3.0 3.0 3.15 3.25 V/V Maximum Current Sense Input Threshold (Note 5) UC2843D, UC284XB, UC384XB UC384XBV Vth 0.9 − 1.0 − 1.1 − 0.9 0.85 1.0 1.0 1.1 1.1 V Power Supply Rejection Ratio (VCC = 12 V to 25 V, Note 5) PSRR − 70 − − 70 − dB Input Bias Current IIB − − 2.0 −10 − − 2.0 −10 mA Propagation Delay (Current Sense Input to Output) tPLH(In/Out) − 150 300 − 150 300 ns OUTPUT SECTION Output Voltage Low State (ISink = 20 mA) (ISink = 200 mA) UC284XB, UC384XB UC384XBV, UC2843D High State (ISource = 20 mA) UC284XB, UC384XB UC384XBV, UC2843D (ISource = 200 mA) VOL VOH − − − 13 − 12 0.1 1.6 − 13.5 − 13.4 0.4 2.2 − − − − − − − 13 12.9 12 0.1 1.6 1.6 13.5 13.5 13.4 0.4 2.2 2.3 − − − V Output Voltage with UVLO Activated (VCC = 6.0 V, ISink = 1.0 mA) VOL(UVLO) − 0.1 1.1 − 0.1 1.1 V Output Voltage Rise Time (CL = 1.0 nF, TJ = 25°C) tr − 50 150 − 50 150 ns Output Voltage Fall Time (CL = 1.0 nF, TJ = 25°C) tf − 50 150 − 50 150 ns UNDERVOLTAGE LOCKOUT SECTION Startup Threshold (VCC) UCX842B, BV UCX843B, BV, D Vth 15 7.8 16 8.4 17 9.0 14.5 7.8 16 8.4 17.5 9.0 V Minimum Operating Voltage After Turn−On (VCC) UCX842B, BV UCX843B, BV, D VCC(min) 9.0 7.0 10 7.6 11 8.2 8.5 7.0 10 7.6 11.5 8.2 V PWM SECTION Duty Cycle Maximum UC284XB, UC384XB, UC2843D Maximum UC384XBV Minimum DC(max) DC(min) 94 − − 96 − − − − 0 94 93 − 96 96 − − − 0 % TOTAL DEVICE Power Supply Current Startup (VCC = 6.5 V for UCX843B, UC2843D Startup VCC 14 V for UCX842B, BV) (Note 7) ICC + IC − − 0.3 12 0.5 17 − − 0.3 12 0.5 17 mA Power Supply Zener Voltage (ICC = 25 mA) VZ 30 36 − 30 36 − V 5. This parameter is measured at the latch trip point with VFB = 0 V. 6. Comparator gain is defined as: AV DV Output Compensation DV Current Sense Input 7. Adjust VCC above the Startup threshold before setting to 15 V. 8. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. Tlow = 0°C for UC3842B, UC3843B; −25°C for UC2842B, UC2843B; −40°C for UC3842BV, UC3843BV, UC2843D Thigh = +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B, UC2843D; +105°C for UC3842BV, UC3843BV |
Аналогичный номер детали - UC3843BVNG |
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Аналогичное описание - UC3843BVNG |
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