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One chip driver for slim CD-ROM/RW, DVD-ROM BH6546KV DescriptionDimension (Units : mm) Features Applications Absolute Maximum Ratings (Ta=25 ̊C) VQFP48C +0.05 -0.03 +0.05 -0.04 0.5 ± 0.15 1.0 ± 0.2 0.145 0.22 9.0 ± 0.2 7.0 ± 0.1 9.0 ± 0.2 7.0 ± 0.1 48 37 1 12 13 24 2536 0.5 ± 0.1 1.6Max. 0.1 ± 0.05 0.75 0.75 1.4 ± 0.05 4 ̊ +6 ̊ -4 ̊ 0.08S 0.08 M Power MOS supply voltage Control circuit supply voltage Maximum output current Power dissipation Operating temperature range Storage temperature range ParameterSymbol Limits Unit PVcc Vcc IoMAX Pd Topr Tstg 6 6 3 1.18 –30 ~ +85 –55 ~ +150 V V A W ̊C ̊C *1 *2 CD-ROM, CD-RW, DVD-ROM BH6546KV is a 4-channel PWM driver that drives spindle/slide motor, and focus/track actuator coil of optical disc. In high speed and 180 ̊ PWM driving slim disc, the spindle driver can achieve low vibration/low noise. 1) Low vibration/low noise by 180 ̊ PWM driving 2) Charge-pump circuit is not necessary for output due to complement power MOSFET. 3) Low power consumption due to low ON resistance Spindle driver output: 0.5W (Typ.) Slide/Focus/Tracking driver output: 1.2W (Typ.) 4) 1 phase/3 phase FG output can be switched by FG switching pin. 5) VQFP48C contributes to make the set smaller and thinner. *1 Intermittent current at maximum applied time of 5msec, 1/10 duty (Max.) *2 Derating : 9.5mW/ ̊C for operation above Ta=25 ̊C On less than 3% (percentage occupied by copper foil), 70mmx70mm, t=1.6mm, glass epoxy mounting. Power MOS supply voltage Control circuit supply voltage Ambient temperature PVcc Vcc Ta 3.0 ~ 5.5 4.0 ~ 5.5 –10 ~ +70 V V ̊C Recommended Operating Conditions ParameterUnitLimitsSymbol