52504 jo im no.7886-1/3 LA6548 overview the LA6548 is a 4ch bridge (btl) driver with built-in 3.3vreg and reset for cd players. functions ? bridge connection (btl) power amp 4ch. ? provides mute function (activate for all channels output. when mute is h, output is on.) ? built-in 3.3vreg (with external pnp transistor) ? built-in reset circuit (with external capac itor, reset output delay time can be set.) specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc max 14 v allowable operation pd max *meas urement on the specific board 2.3 w maximum input voltage vinb 13 v mute pin voltage vmute 13 v operating ambient temperature topr -20 to +75 c storage ambient temperature tstg -55 to +150 c * specific board size: 114.3mm 76.1mm 1.6mm, board material: glass epoxy resin. recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit operating voltage v cc 4 to 13 v reset output source current iorh 0 to 200 a reset output sink current iorl 0 to 2 ma ordering number : enn*7886 monolithic linear ic 4ch bridge (btl) driver for cd
LA6548 no.7886-2/3 electrical characteristics at ta = 25 c, v cc = 6v, vref = 1.65v ratings parameter symbol conditions min typ max unit [whole] no-load current consumption 1 i cc -on all channels output on, mute; h 20 40 ma no-load current consumption 2 i cc -off all channels outpu t off, mute; l 15 35 ma output offset voltage v off each channel -50 50 mv buffer input voltage range vbin vref buffer amp input range 1.5 v cc -1.5 v output voltage v o r l = 8.0 ? *1 2.6 3 v closed circuit voltage gain vg input/output gain 9 db slew rate sr 0.15 v/ s mute on voltage vmute *2 1.2 v [power supply part] (2sb632k is used) output voltage v out 1 i o = 200ma 3.13 3.3 3.47 v line regulation ? voln1 4v v cc 12v 40 100 mv load regulation ? vold1 5ma i o 200ma 50 150 mv [reset part] h reset output voltage vorh iorh = 200 a, pin open cd 3.08 3.25 3.42 v l reset output voltage vorl isrl = 2ma, short circuit between cd and gnd. 100 200 mv reset threshold voltage vrt *3 2.58 2.75 2.92 v reset hysteresis voltage vhys *4 40 80 160 mv reset output delay time td cd = 0.1 f 10 ms * 1. output voltage differences when connecting the 8 ? load between outputs for each channels. * 2. mute voltage when output is on or off. when mu te is h, all outputs are on. when mute is l, all channels are off. * 3. 3.3 vreg voltage when reset is l. * 4. 3.3 vreg voltage difference between reset "l" and reset "h". package dimensions unit : mm 3227a
LA6548 no.7886-3/3 ps
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