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| Optical disc ICs 4-channel PWM driver for CD and MD use BH6512FS / BH6513FS The BH6512FS / BH6513FS are 4-channel PWM drivers for driving the motors and actuators in CD and MD players. MOSFET output stages are employed to keep power consumption down, and a charge pump circuit is included to multiply the VG voltage. FApplications CD and MD players (portable units) FFeatures 1) Four power MOS H-bridges. 2) Charge pump ( 3). 3) PWM input. FAbsolute maximum ratings (Ta = 25_C) 4) Low on-resistance. 5) Low power consumption. 6) Compact SSOP-A32 package. FRecommended operating conditions (Ta = 25_C) 695 Optical disc ICs FBlock diagram BH6512FS / BH6513FS FPin descriptions 696 Optical disc ICs FInput / output circuits BH6512FS / BH6513FS 697 Optical disc ICs BH6512FS / BH6513FS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VM = 2.5V, VDD = 3V, VG is the internally pumped output, fIN = 176kHz, and RL = 8 *47H) FDriver truth table 698 Optical disc ICs FMeasurement circuit BH6512FS / BH6513FS 699 Optical disc ICs FOperation notes (1) The charge pump circuit is a 3 multiplier that uses the voltage on pin 30 as its reference. Therefore, set the voltage (VDD) on pin 30 so that the VG does not exceed its rating. (2) If you will use an externally-supplied VG, disconnect the capacitors between pins 31 and 32 and pins 1 and 2. BH6512FS / BH6513FS (3) The charge pump oscillator circuit runs freely when the CLK pin is connected to either VDD or GND. Also, as there is a pull-down resistor on the chip, it will also free run if CLK is left floating. To synchronize with an external clock, input the clock pulses from the CLK pin. FExternal dimensions (Units: mm) 700 |
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