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UC3842A-BW 数据表(PDF) 2 Page - First Components International |
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UC3842A-BW 数据表(HTML) 2 Page - First Components International |
2 / 10 page 2 Electrical characteristics (*VCC=15V, RT=10kΩ, CT=3.3nF, TA=00C to +700C, unless otherwise specified) Characteristics Symbol Test Condition Min Typ Max Unit Reference Section Reference Output Voltage VREF TJ = 25°C, IREF = 1 mA 4.9 5.0 5.1 V Line Regulation ∆VREF 12V ≤ VCC ≤ 25 V 6.0 20 mV Load Regulation ∆VREF 1 mA ≤ IREF ≤ 20mA 6.0 25 Short Circuit Output Current ISC TA = 25°C -100 -180 mA Oscillator Section Oscillation Frequency f TJ = 25°C 47 52 57 KHz Frequency Change with Voltage ∆f/∆VCC 12V ≤ VCC ≤ 25 V 0.05 1.0 % Oscillator Amplitude V(OSC) (peak to peak) 1.6 V Error Amplifier Section Input Bias Current IBIAS VFB=3V -0.1 -2 µA Input Voltage VI(E.A) Vpin1 = 2.5V 2.42 2.5 2.58 V Open Loop Voltage Gain AVOL 2V ≤ V0 ≤ 4V 65 90 dB Unity Gain Bandwidth UGBW Tj=250C, Note 3 0.5 0.6 MHz Power Supply Rejection Ratio PSRR 12V ≤ VCC ≤ 25 V 60 70 dB Output Sink Current ISINK Vpin2 = 2.7V, Vpin1 = 1.1V 2 7 mA Output Source Current ISOURCE Vpin2 = 2.3V, Vpin1 = 5V -0.5 -1.0 mA High Output Voltage VOH Vpin2 = 2.3V, RL = 15KΩ to GND 5.0 6.0 Low Output Voltage VOL Vpin2 = 2.7V, RL = 15KΩ to PIN 8 0.8 1.1 V Current Sense Section Gain GV (Note 1 & 2) 2.85 3.0 3.15 V/V Maximum Input Signal VI(MAX) V pin1 = 5V (Note1) 0.9 1.0 1.1 V Supply Voltage Rejection SVR 12V ≤ VCC ≤ 25 V (Note 1) 70 dB Input Bias Current IBIAS Vpin3 = 3V -3.0 -10 µA Output Section Low Output Voltage VOL ISINK = 20 mA 0.08 0.4 ISINK = 200 mA 1.4 2.2 High Output Voltage VOH ISINK = 20 mA 13 13.5 ISINK = 200 mA 12 13.0 V Rise Time tR TJ = 25°C, CL = 1nF (Note 3) 45 150 Fall Time tF TJ = 25°C, CL = 1nF (Note 3) 35 150 nS Undervoltage Lockout Section Start Theshold VTH(ST) UC3842A-BW/44A-BW 14.5 16.0 17.5 UC3843A-BW/45A-BW 7.8 8.4 9.0 V Min. Operating Voltage VOPR(min) UC3842A-BW/44A-BW 8.5 10 11.5 (After Turn On) UC3843A-BW/45A-BW 7.0 7.6 8.2 V PWM Section Max. Duty Cycle D(MAX) UC3842A-BW/43A-BW 95 97 100 UC3844A-BW/45A-BW 47 48 50 % Min. Duty Cycle D(MAX) 0 Total Standby Current Start −Up Current IST UC384XA-BW 0.17 0.3 Operating Supply Current ICC (OPR) Vpin3 = Vpin2 = 0V 13 17 mA Zener Voltage VZ ICC=25 mA 30 38 V * Adjust VCC above the start threshold before setting it to 15V. Note 1: Parameter measured at trip point of latch with Vpin2=0. Note 2: Gain defined as A= ∆Vpin1/∆Vpin3 ; 0 ≤ Vpin3 ≤ 0.8V. Note 3: These parameters, although guaranteed, are not 100% tested in production. UC384XA-BW Current Mode PWM Controller (UC3842A-BW/43A-BW/44A-BW/45A-BW) |
类似零件编号 - UC3842A-BW |
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类似说明 - UC3842A-BW |
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