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UC3842BN Scheda tecnica(PDF) 4 Page - ON Semiconductor |
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UC3842BN Scheda tecnica(HTML) 4 Page - ON Semiconductor |
4 / 21 page UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (VCC = 15 V [Note 5], 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 6], unless otherwise noted.) UC284XB UC384XB, XBV Characteristics Symbol Min Typ Max Min Typ Max Unit OUTPUT SECTION Output Voltage Low State (ISink = 20 mA) (ISink = 200 mA) UC284XB, UC384XB UC384XBV High State (ISource = 20 mA) UC284XB, UC384XB UC384XBV (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 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 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 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, Startup VCC 14 V for UCX842B, BV) (Note 5) 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. Adjust VCC above the Startup threshold before setting to 15 V. 6. 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 Thigh = +70°C for UC3842B, UC3843B; +85°C for UC2842B, UC2843B; +105°C for UC3842BV, UC3843BV NCV3843BV: Tlow = −40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control. |
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