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| Optical disc ICs 4-channel PWM driver for CD and MD players BH6510FS The BH6510FS is a 4-channel PWM driver for CD and MD player motors and actuators. The power MOSFET in the output stage assures low power consumption for applications. FApplications CD and MD players FFeatures 1) Internal 4-channel power MOS H-bridge. 2) Adaptable for PWM input. 3) Low ON resistance. FAbsolute maximum ratings (Ta = 25_C) 4) Low power consumption. 5) 32-pin SSOP-A package. Compact package. FRecommended operating conditions 253 Optical disc ICs FBlock diagram BH6510FS FPin descriptions 254 Optical disc ICs FPin equivalent circuit BH6510FS FElectrical characteristics (unless otherwise noted, Ta = 25_C, VM = 2.5V, VDD = 3V, VG = 10V, fIN = 176kHz, RL = 8 * 47H) 255 Optical disc ICs FMeasurement circuit BH6510FS 256 Optical disc ICs FCircuit operation fPWM driver The output stage is an H-bridge driver with four N-type FET circuits. Output PWM duty is changed according to input PWM duty. This pulse drives the load (direct PWM). Driver truth table BH6510FS 257 Optical disc ICs FApplication example BH6510FS 258 Optical disc ICs FOperation notes This IC uses three power supplies : VDD, VG and VM. Below are the blocks to which each power supply connects. VDD : control block (INTERFACE) VG : pre drive block VM : H-bridge block FElectrical characteristic curves BH6510FS As starting VG and VM when VDD is open could cause the top and bottom output MOS to turn on simultaneously before the previous stage logic stabilizes, be sure to design so that VDD starts up first. 259 Optical disc ICs FExternal dimensions (Units: mm) BH6510FS 260 |
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