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UC2843BL-S08-R 数据表(PDF) 4 Page - Unisonic Technologies |
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UC2843BL-S08-R 数据表(HTML) 4 Page - Unisonic Technologies |
4 / 8 page UC2843B LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 4 of 8 www.unisonic.com.tw QW-R103-048.D ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT OSCILLATOR SECTION Frequency fOSC TJ =25°C, RT =62kΩ, CT =1nF, Min =225 kHz, Max =275 kHz 49 52 55 kHz TJ = Full range 48 56 kHz Frequency Change with Voltage V ∆ f ∆ OSC VCC = 12V ~ 25V 0.2 1 % Frequency Change with Temperature T ∆ f ∆ OSC TJ = Full range 5 % Oscillator Voltage Swing VOSC Peak to peak 1.7 V Discharge Current IDISC TJ =25°C, RT/CT =2V 7.8 8.3 8.8 mA RT/CT =2V 7.5 8.8 mA ERROR-AMPLIFIER SECTION Voltage Feedback Input VFB COMP =2.5V 2.45 2.5 2.55 V Input Bias Current II(BIAS) -0.3 -1 μA Open Loop Voltage Gain GVO VOUT =2V~4V 65 90 dB Unity Gain Bandwidth GBW 0.7 1 MHz Power Supply Rejection Ratio PSRR VCC =12V~25V 60 70 dB Output Sink Current ISINK VFB =2.7V, COMP=1.1V 2 6 mA Output Source Current ISOURCE VFB =2.3V, COMP =5V -0.5 -0.8 mA Output Voltage Swing High State VOH VFB =2.3V, RL =15kΩ to GND 5 6 V VOL VFB =2.7V, RL =15kΩ to GND 0.7 1.1 V CURRENT-SENSE SECTION Current Sense Input Voltage Gain GV (Note 2,3) 2.85 3 3.15 V/V Maximum Current Sense Input Threshold VTH COMP =5V (Note 2) 0.9 1 1.1 V Power Supply Rejection Ratio PSRR VCC =12V~25V (Note 2) 70 dB Input Bias Current II(BIAS) -2 -10 μA Propagation Delay tD VFB =0V~2V 150 300 ns OUTPUT SECTION High-Level Output Voltage VOH IOH =-20mA 13 13.5 V IOH =-200mA 12 13.5 V Low-Level Output Voltage VOL IOL =20mA 0.1 0.4 V IOL =200mA 1.5 2.2 V Under-Voltage Lockout Output Voltage VUVLO VCC =5V, IOL=1mA 0.7 1.2 V Output Voltage Rise Time tR CL =1nF, TJ = 25°C 50 150 ns Output Voltage Fall Time tF CL =1nF, TJ = 25°C 50 150 ns UNDERVOLTAGE-LOCKOUT SECTION Startup Threshold VTH 7.8 8.4 9 V Minimum Operating Voltage After Start-Up VCC(MIN) 7 7.6 8.2 V PULSE-WIDTH MODULATOR SECTION Maximum Duty Cycle DC(MAX) 94 96 100 % Minimum Duty Cycle DC(MIN) 0 % SUPPLY VOLTAGE Power Startup Supply Current ICC+IC 0.3 0.5 mA Power Operating Supply Current ICC+IC VFB and ISENSE at 0V 11 17 mA Power Supply Zener Voltage VZ ICC =25mA 30 34 V Notes: 1. Adjust VCC above the start threshold before setting it to 15V. 2. Measured at the trip point of the latch, with VFB at 0V. 3. Measured between ISENSE and COMP, with the input changing from 0V ~ 0.8V. |
类似零件编号 - UC2843BL-S08-R |
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类似说明 - UC2843BL-S08-R |
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