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LX1684CD Datasheet(PDF) 3 Page - Microsemi Corporation |
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LX1684CD Datasheet(HTML) 3 Page - Microsemi Corporation |
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3 / 12 page  Microsemi Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 Copyright © 2000 Rev. 1.0c, 2005-03-08 LX1684 Voltage-Mode PWM Controller PRODUCTION DATA SHEET TM ® ELECTRI CAL CHA RACTERI S TI CS Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C except where otherwise noted. Test conditions: VCC=5V, VC1=16V LX1684 Parameter Symbol Test Conditions Min Typ Max Units REFERENCE Reference Voltage VFB VOUT =VFB, TA=25°C 1.237 1.25 1.262 V VOUT =VFB, 0°C < TA < 70°C 1.231 1.269 V OSCILLATOR Frequency FOSC 135 175 200 kHz Ramp Amplitude VRAMP 1.25 VPP ERROR AMPLIFIER Input Resistance RIN VOUT = VFB 20 k Ω CURRENT SENSE Current Set ISET VCS = VCC –0.4V 40 45 µA VTRIP 300 380 420 mV Current Sense Delayed TCSD 1.0 µsec OUTPUT DRIVERS Drive Rise Time, Fall Time TRF CL = 3000pF 50 nS Drive High VDH ISOURCE = 20mA, VC1=16V 13 14 V Drive Low VDL ISINK = 20mA, VC1 =16V 0.1 0.2 V UVLO AND SOFT-START (SS) VCC5 Start-Up Threshold VST VC1 > 4.0V 4.0 4.25 4.5 V Hysteresis 0.10 V SS Resistor RSS 22 k Ω SS Output Enable VEN 0.25 0.3 0.35 V Hiccup Duty Cycle DCHIC CSS = 0.1µF, FREQ =100Hz 12 14 % SUPPLY CURRENT VC1 Dynamic Supply Current ICD Out Freq = 175kHz, CL=3000pF, Synch., VSS > 0.3V 30 40 mA Static Supply Current VC1 IVC1 VSS < 0.3V ; outputs low (disable), VC1 = 16V 7 9 mA 5V IVCC VSS > 0.3V ; outputs low (disable) 9 12 mA |
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