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UC3843BP-D08-T Datasheet(PDF) 4 Page - Unisonic Technologies |
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UC3843BP-D08-T Datasheet(HTML) 4 Page - Unisonic Technologies |
4 / 10 page UC3842B/3843B LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 4 of 10 www.unisonic.com.tw QW-R103-012.E ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT ERROR AMPLIFIER SECTION Voltage Feedback Input VFB Vo=2.5V 2.42 2.50 2.58 V Input Bias Current II(BIAS) VFB=5.0V -0.1 -2.0 μA Open Loop Voltage Gain GVO 2 ≤VO≤4V 65 90 dB Unity Gain Bandwidth GBW TJ =25℃ 0.7 1.0 MHz Power Supply Rejection Ratio PSRR I2V≤VCC≤25V 60 70 dB Output Sink Current ISINK VO=1.1V,VFB =2.7V 2.0 12 mA Output Source Current ISOURCE VO=5.0V,VFB=2.3V -0.5 -1.0 mA Output Voltage Swing High State VOH VFB=2.3V, RL=15k to GND 5.0 6.2 V Output Voltage Swing Low State VOL VFB=2.7V, RL=15k to VREF 0.8 1.1 V CURRENT SENSE SECTION Current Sense Input Voltage Gain GV (Note 2, 3) 2.85 3.0 3.15 V/V Maximum Current Sense Input Threshold VI(THR) (Note 2) 0.9 1.0 1.1 V Power Supply Rejection Ratio PSRR 12≤Vcc≤25V (Note 2) 70 dB Input Bias Current II(BIAS) -2 -10 μA Propagation Delay tD(IN/OUT) Current Sense Input to Output 150 300 ns OUTPUT SECTION Output Low Voltage VOL ISINK=20mA 0.1 0.4 V ISINK=200mA 1.6 2.2 V Output High Voltage VOH ISOURCE=20mA 13 13.5 V ISOURCE=200mA 12 13.4 V Output Voltage with UVLO Activated VOL (UVLO) VCC=6.0V,ISINK=1.0mA 0.1 1.1 V Output Voltage Rise Time tR TJ =25℃,CL=1nF 50 150 ns Output Voltage Fall Time tF TJ =25℃,CL=1nF 50 150 ns UNDER-VOLTAGE LOCKOUT SECTION Startup Threshold VTHR UC3842B 14.5 16 17.5 V UC3843B 7.8 8.4 9 V Min. Operating Voltage After Turn-on(VCC) VCC(MIN) UC3842B 8.5 10 11.5 V UC3843B 7.0 7.6 8.2 V PWM SECTION Duty Cycle MAX DC 94 96 % MIN 0 % Total DEVICE Power Startup Supply Current ICC+IC VCC=6.5V for UC3843B VCC=14V for UC3842B 0.3 0.5 mA Power Operating Supply Current ICC+IC Note 1 12 17 mA Power Supply Zener Voltage VZ ICC=25mA 30 36 V Note: 1. 2. Adject VCC above the Startup threshold before setting to 15V. This parameter is measured at the latch trip point with VFB=0V. 3. Comparator gain is defined as : GV Δ V Output Compensation ΔV Current Sense Input |
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