technical note motor driver ic series fo r tape record systems 2 in 1 motor driver for vtrs bd6903efv, bd6904fp description the bd6903efv and bd6904fp single chip 3-phase full-wave motor driv ers integrate soft switching for low noise sensorless drivin g as well as a pg amplifier that enables pg/fg output, making them ideal for use in cylinder motors and l oading motors in non-portable vi deo tape recorders (vtrs). features 1) cylinder motor driver 2) sensorless 3-phase full-wave soft switching drive system 3) dmos output 4) built-in startup circuit 5) built-in pg amp 6) 3-value common pg/fg output 7) loading motor driver 8) three mode output (forward, reverse, brake), depending on control logic input 9) dmos output 10) built-in thermal shut-down (tsd) circuit applications vtrs product line parameter bd6903efv bd6904fp control block (vcc) 4.5 5.5v 4.5 5.5v control block (vg) vm+3 19v vm+2 19v power supply voltage output block (vm) 9 13.5v 9 14v 800ma 800ma maximum output current (cylinder) (loading) 1000ma 800ma current limit voltage no 295mv reversible operation mode forward rotation, reverse rotation, brake forward rotation, reverse rotation, stop, brake number of reversible control input pins 1pin 2pins package htssop-b20 hsop-25 ver.b oct.2005
2/16 absolute maximum ratings (ta = 25c) bd6903efv bd6904fp parameter symbol limit limit unit applied voltage vcc 7 7 v applied voltage vm 15 15 v applied voltage vg 20 20 v power dissipation pd 1000 *1 1450 *2 mw operating temperature range topr -20 +75 -20 +75 storage temperature range tstg -55 +150 -55 +150 maximum output current (cylinder block) iomax1 800 *3 800 *3 ma maximum output current (loading block) iomax2 1000 *3 800 *3 ma junction temperature tjmax +150 +150 *1 reduced by 8.0 mw/ over 25c when mounted on a glass epoxy board (70 mm 70 mm 1.6 mm). *2 reduced by 11.6 mw/ over 25c when mounted on a glass epoxy board (90 mm 90 mm 1.6 mm). *3 must not exceed pd or aso. operating conditions bd6903efv bd6904fp parameter symbol limit limit unit operating power supply voltage range vcc 4.5 5.5 4.5 5.5 v operating power supply voltage range vm 9 13.5 9 14 v operating power supply voltage range vg vm+3 19 vm+2 19 v uin, vin, win in-phase input voltage range vbemfd 0 vm - v com input in-phase voltage range vcomd - 0 vm-2.5 v pg amp in-phase input voltage range vpd 1.5 3.0 1.5 3.7 v
3/16 electrical characteristics bd6903efv (unless otherwise specified, ta=25 , vcc=5v, vm =12v, vg=17v) limit parameter symbol min. typ. max. unit conditions vcc total supply current icc - 9.2 14.2 ma vm total supply current 1 im1 - 1.4 2.8 ma lin=h or l vm total supply current 2 im2 - 1.4 2.8 ma lin=m |