( /4) m62235p/fp 990819 mitsubishi switching power supply secondary side control block diagram m62235 is a monolithic integrated circuit designed for switching power supply secondary side control. having one detection circuit to monitor and feedback 1 system output voltage to the primary side and the other detection circuit to output abnormal signal by detecting 2 system output overvoltage and 2 system output overcurrent, the number of external components on the secondary side can be reduced. overcurrent detection circuit has built-in delay circuit with external capacitor to prevent erroneous overcurrent detection by the instant output shortcircuit. furthermore, compact design is made easy by10 pin small sop package. vcc vd1 vd2 pc2 ct cd2 cd1 pc1 v in overvoltage detection comp2 overcurrent detection comp2 gnd pin configuration(top view) outline 10p2n-a pc2 ct vd1 vd2 vin gnd cd1 cd2 vcc pc1 outline 14p4 n.c gnd ct pc2 n.c n.c cd1 cd2 vd2 vd1 vin n.c pc1 n.c:no connection vcc 1 2 3 4 5 6 7 10 9 8 11 12 13 14 1 2 3 4 5 6 7 10 9 8 overvoltage detection comp1 overcurrent detection comp1 power-on reset ref. volt. 1.26v application features description flyback regulator *1 system output voltage detection circuit(output voltage can be set arbitrary.) *2 system overvoltage detection circuit built-in(without delay circuit) *2 system overcurrent detection circuit built-in(with delay circuit) *pc output current--------10ma(max.) 1
( /4) m62235p/fp 990819 mitsubishi switching power supply secondary side control terminal description vd1 vcc pc2 vin pc1 cd2 gnd vd2 cd1 2 3 4 5 6 9 10 ct 1 7 8 vcc ipc 25 v ma 10 vpc 25 v vvd 25 v vcd -0.3 ~ 1.0 v pd 440 mw k q mw/oc -30 ~ +85 topr -40 ~ +125 tstg (3) (4) (6) (7) (8) (12) (14) (1) (9) (11) 4.4 10 pin sop 14 pin dip 10 pin sop 14 pin dip ta > 25oc 1100 11.0 2 terminal no. symbol description on functions terminal for power supply output terminal for overvoltage/overcurrent detection signal(open collector output) delay time setting termianl for overcurrent detection(tpd=400ms@47uf) overvoltage detection terminal(detection vpltage:1.26v) overvoltage detection terminal(detection vpltage:1.26v) overcurrent detection terminal(detection vpltage:-185mv) overvcurrent detection terminal(detection vpltage:-155mv) gnd terminal input terminal for voltage control amp. output terminal for voltage control amp.(open collector output) absolute maximum ratings(ta=25o c ,unless otherwise noted.) parameter condition ratings unit symbol supply voltage power dissipation thermal derating ratio pc1,2 terminal current pc1,2 terminal voltage vd1,2 terminal voltage cd1,2 terminal voltage operating temperature storage temperature oc oc
( /4) m62235p/fp 990819 mitsubishi switching power supply secondary side control vcc icc 5 24 5 1.20 1.26 1.32 v ma v 1.26 400 msec ip.c2=5ma 0.3 v -1.0 1.16 1.36 v v a -147 -155 -163 -175 -185 -195 12 v vcd1=155mv 3.3v vcd2=185mv 12v system 3.3v system 12v system 3.3v system 12v system 3.3v system 0.3 v ip.c1=5ma vref iinvin iinvd2 iinvd1 iincd1 iincd2 vsatpc1 vsatpc2 ct=47f 300 500 12 vdet1 vdet2 idet1 idet2 reg-in vref/ d t mv mv tdct 5 12 mv vcc=5v ~ 24v 0.01 %/oc a a 1.0 a a -1.0 1.0 1.26 1.16 1.36 -1.0 1.0 -100 -100 electrical characteristics(ta=25oc, vcc=5v, unless otherwise noted.) symbol parameter test conditions unit max. typ. min. limits supply voltage range circuit current reference voltage ref. voltage temp. coefficient ref. volt. fluctuation over vcc control amp. input bias current control amp.output sat. volt. overvoltage detection volt.1 input current1 overvoltage detection volt.2 input current2 overcurrent detection volt.1 input current1 overcurrent detection volt.2 input current2 delay time pc terminal output sat. volt. 3
( /4) m62235p/fp 990819 mitsubishi switching power supply secondary side control 4 application circuit
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