uc3842b-s08-t Unisonic Technologies, uc3842b-s08-t Datasheet
uc3842b-s08-t
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uc3842b-s08-t Summary of contents
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... High current totem pole output * Undervoltage lockout with hysteresis * Low startup and operating current ORDERING INFORMATION Ordering Number Normal Lead Free Plating UC3842B-D08-T UC3842BL-D08-T UC3842B-S08-R UC3842BL-S08-R UC3842B-S08-T UC3842BL-S08-T UC3843B-D08-T UC3843BL-D08-T UC3843B-S08-R UC3843BL-S08-R UC3843B-S08-T UC3843BL-S08-T www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd LINEAR INTEGRATED CIRCUIT ...
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... UC3842B/3843B PIN CONFIGURATION COMP PIN DESCRIPTIONS PIN NO. PIN NAME I/O 1 COMP GND 6 OUTPUT REF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com. Error amp output to provide loop compensation maintaing V Error amp inverting input, The non-inverting input of error amp is 2.5V band ...
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... UC3842B/3843B BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT QW-R103-012 ...
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... UC3842B/3843B ABSOLUTE MAXIMUM RATINGS PARAMETER Total Power Supply and Zener Current Output Current, Source or Sink (note1) Output Energy (capacitive load per cycle) Current Sense and Voltage Feedback Inputs Error Amp. Output Sink Current Power Dissipation Operating Junction Temperature Operating Temperature Storage Temperature Range Note Absolute maximum ratings are those values beyond which the device could be permanently damaged ...
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... =25°C,C =1nF UTC UC3842B V THR UTC UC3843B UTC3842B V CC(MIN) UTC3843B DC Vcc=6.5V for UC3843B Icc+Ic Vcc=14V for UC3842B Icc+Ic Note2 Vz Icc=25mA =0V. FB ∆V Output Compensation G V ∆V Current Sense Input LINEAR INTEGRATED CIRCUIT MIN TYP MAX 0.8 1.1 2.85 3.0 3.15 0.9 1.0 1.1 ...
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... UC3842B/3843B TYPICAL CHARACTERISTICS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw LINEAR INTEGRATED CIRCUIT QW-R103-012 ...
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... UC3842B/3843B TYPICAL CHARACTERISTICS(Cont.) Figure 7. Error Amp Open Loop Gain Phase Vs. Frequency 100 Vcc=15V V OUT 80 R =100K Gain L T =25° -20 10k 10 100 1.0k Frequency, f (Hz) Figure 9. Reference Voltage Change Vs. Source Current 0 -4.0 -8.0 -12 T =125°C A -16 -20 T =25° Reference Source Current, Iref (mA) Figure 11 ...
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... UC3842B/3843B TYPICAL CHARACTERISTICS(Cont.) Figure 13. Outrput Saturation Voltage Versus Load Current 0 Source Saturation (Load to Ground) Vcc -10 T =25°C A -20 T =-55° =-55° Sink Saturation (Load to Vcc 200 400 Output Load Current, I Figure 15. Output Cross Conduction UTC assumes no responsibility for equipment failures that result from using products at values that ...