3-4
MPC1718 � 4-STAGE PWM SERVODRIVER
Pin NameDirectionDescription
�����������������������������������������������������������������������������������������������������������
1 Hin2? servo driverpower supply for H-bridge output section 2
2 Hout2Aservo driver ? disc motorH-bridge PWM output 2A
3 DCout2DC/DC converter 2 ? LC-filterconnects H-bridge DC/DC converter 2 to LC-filter
4 Vin+Apower supply for servo driver
5 DCout1DC/DC converter 1 ? LC-filterconnects H-bridge DC/DC converter 1 to LC-filter
6 Gnd1,2GNDground for H-bridge section 1 and 2
7 Hout1Aservo driver ? focus servoH-bridge PWM output 1A
8 Hin1? servo driverpower supply for H-bridge output section 1
9 Hout1Bservo driver ? focus servoH-bridge PWM output 1B
10 Voutservo driver ?PWM output of DC/DC converter of VLG power supply
11 DTC? servo driverdead time control pin (used to set duty value of Vout output)
12 FBoutservo driver ?feedback for DC/DC converter of VLG power supply
13 INM? servo driverinverting input for DC/DC converter of VLG power supply
14 INP? servo drivernon-inverting input for DC/DC converter of VLG power supply
15 VBiasservo driver ?bias stabilizing capacitor connection pin for DC/DC converter
16 Vdservo driver ? +Spower switch output pin of servo driver
17 S.GndGNDground for internal logic of servo driver
18 Vrefservo driver ? +1.2band-gap reference voltage output of servo driver
19 VG+VG ? servo drivergate drive power supply for output transistor,
power is supplied by using the Cg pin to form a charge pump.
20 Cgservo driver ?charge pump step-up capacitor connection
21 Vregservo driver ? +1.8regulator output pin
22 Coscservo driver ?sawtooth waveform output, synchronized to the clock
23 Sync? servo driverexternal clock input for separate excitation
24 Power?P ? servo driverpower control pin (low-active)
25 Hout3Bservo driver ? track servoH-bridge PWM output 3B
26 Hin3? servo driverpower supply for H-bridge output section 3
27 Hout3Aservo driver ? track servoH-bridge PWM output 3A
28 Gnd3,4GNDground for H-bridge section 3 and 4
29 DCout3DC/DC converter 3 ? LC-filterconnects H-bridge DC/DC converter 3 to LC-filter
30 Vin+Apower supply for servo driver
31 DCout4DC/DC converter 4 ? LC-filterconnects H-bridge DC/DC converter 4 to LC-filter
32 Hout4Aservo driver ? slide servoH-bridge PWM output 4A
33 Hin4? servo driverpower supply for H-bridge output section 4
34 Hout4Bservo driver ? slide servoH-bridge PWM output 4B
35 Lim2,4+LFinput pin, limits LC-filter output voltages of sections 2 and 4
36 Vinp3CD7 ? servo drivercontrol input pin, receives track servo signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
37 Vinp4CD7 ? servo drivercontrol input pin, receives slide servo signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
38 VLG+3.5power supply for motor control circuit
39 S.GndGNDground for internal logic of servo driver
40 VcDR_REFreference voltage for motor control circuit
41 Vinp2CD7 ? servo drivercontrol input pin, receives disc motor control signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
42 Vinp1CD7 ? servo drivercontrol input pin, receives focus servo signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
43 Lim1,3+LF ? servo driverinput pin, limits LC-filter output voltages of sections 1 and 3
44 Hout2Bservo driver ? disc motorH-bridge PWM output 2B
CS 46 444 |
ACEC
