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ASM8I1843F-08-SX Datasheet(PDF) 4 Page - Alliance Semiconductor Corporation |
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ASM8I1843F-08-SX Datasheet(HTML) 4 Page - Alliance Semiconductor Corporation |
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4 / 11 page  ASM8P18S42 / ASM8P18S42ER ASM8P1843 / ASM8P18S43ER June 2005 ASM8P18S44ER / ASM8P18S45ER rev 0.6 Voltage Mode PWM Controller with EMI Reduction 4 of 11 Notice: The information in this document is subject to change without notice. Electrical Characteristics Unless otherwise noted, VDD=15V, Capacitor on FSEL = 330pf, ISENS = 0.5V. Specifications are over the –40°C to +85°C ambient temperature range. Typical values are at 25°C. Parameter Symbol Conditions Min Typ Max Units REFERENCE SECTION ASM8P18S42 & ASM8P1843 Output voltage VREF TA = +25°C, IOUT = 1mA 4.90 5.00 5.1 V Line Regulation N VREF 12V < VDD < 18V, IOUT = 5?A 25 mV Total Reference variation Line, Temperature 0.7 % Temperature Stability TCREF 0.5 mV/°C Load Regulation (ASM8P1843) ImA < Io < 20mA 25 mV ERROR AMPLIFIER SECTION Input Bias Current IBIAS -20 ?A Input Voltage VI Vpin1 = 1.25V 1.2 1.25 1.3 V Open Loop Voltage Gain AVOL 65 dB Power Supply Rejection Ratio PSRR VSTART < VCC < VCC max 80 dB Output Sink Current IOL VFB = 1.32V, VCOMP = 0.15V -1.5 mA Output Source Current IOH VFB = 1.18V, VCOMP = 4.17V 0.3 mA High Output Voltage VOH VFB = 1.25V, RL = 15KP 4.17 V Low Output Voltage VOL VFB = 1.25V 0.15 V CURRENT SENSE SECTION Over Current Protection Threshold VI(MAX) FB = 0V (VCOMP = 5V) 0.90 1.00 1.10 V Delay to output TPD VFB = 0V, ISNS = 0 to 2V 125 ns Under Current Sense Period TUCS 200 ms Under Current Recovery Period TUCSD 3 Cycles of PWM Frequency ASM8P18S42, ASM8P18S42ER 1/4 ASM8P1843 ASM8P18S43ER ASM8P18S44ER 1/10 Cycle Skip Cycle Skip condition: ISENS R 0.1V ASM8P18S45ER No Skip x fS OUTPUT SECTION Low Output Voltage VOL ISINK = 50mA ISINK = 200mA 0.128 0.470 V High Output Voltage VOH ISOURCE = 50mA ISOURCE = 200mA At VDD =15V 14.71 13.77 V On Resistance, High RDS(ON)H ISOURCE = 0.2A 6.5 P On Resistance, Low RDS(ON)L ISINK = 0.2A 2.5 P |
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