– 44 –
MD-MT270H
1 SPGND Ground terminal of spindle output.
2 SPVS Power supply terminal for spindle drive . The capacitor is connected to the GND terminal.
3 FIL Position detection comparator filter terminal in the spindle motor. The capacitor is connected between this
terminal and COMIN terminal (pin).
4 COMIN Position detection comparator filter terminal in the spindle motor. The capacitor is connected between this
terminal and FIL terminal (pin).
5, 6 SGND Small signal GND terminal.
7 VCO VCO oscillation terminal. The capacitor is connected to the GND terminal.
VCO oscillation frequency is changed in accordance with the revolution speed of the motor (voltage at VCOIN terminal).
8 RMAX
VCO maximum frequency setting terminal. The resistor is connected to the GND terminal. The frequency rises by
lowering the resistance.
9 VCOIN
VCO control voltage input terminal. The capacitor is connected to the GND terminal.
Control output is generated according to the revolution speed of the motor inside the logic, and charged/discharged to the
capacitor connected to the GND terminal. The voltage at this terminal controls the VCO oscillation frequency.
10 MODE1 PWM frequency switching input terminal. Select "H" when the CLK terminal (PIN) input frequency is 32
times as high as the spindle PWM frequency, and select "L" when it is 64 times as high.
11 S/S Start/stop terminal in the spindle motor section. Started with "H" level input.
12 MUTE3 Half-bridge mute terminal. All output terminals of the above driver are set into a high impedence state at
the entry of "L".
13 IN4 Half bridge control input terminal.
14 BRK Brake terminal in the spindle motor section. Counter torque brake applied with "L" level input.
15 PWM PWM signal input terminal TR is on with "H" level input.
16 CLK Reference clock input terminal for logic operations. Enter a frequency 32 times or 64 times as high as the
spindle PWM frequency.
17 IN3F H bridge 3 logic input terminal.
18 IN3R
19 VS3 H bridge 3 power supply terminal. The capacitor is connected to the GND terminal.
20 OUT3F H bridge 3 forward output terminal.
21 OUT3R H bridge 3 reverse output terminal.
22 PGND3 H bridge 3 output section GND terminal.
23 PGND2 H bridge 2 output section GND terminal.
24 OUT2R H bridge 2 reverse output terminal.
25 OUT2F H bridge 2 forward output terminal
26 VS2 H bridge 2 power supply terminal. The capacitor is connected to the GND terminal.
27 VS1 H bridge 1 power supply terminal. The capacitor is connected to the GND terminal.
28 OUT1F H bridge 1 forward output terminal.
29 OUT1R H bridge 1 reverse output terminal.
30 PGND1 H bridge 1 output section GND terminal.
31 IN1R H bridge 1 logic input terminal.
32 IN1F
33 IN2R H bridge 2 logic input terminal.
34 IN2F
35 MUTE Mute terminal for H bridge 1-, 2-, 3-phase thread.
Output terminals of drivers above have high impedance when L is input.
36 MUTE2 H bridge 3 mute terminal.
37 CP1
Charge pump booster output terminal. The capacitor is connected between this terminal and CPC1 terminal (pin).
38 CP2 Output terminal for charge pump booster pulse. The capacitor is connected between this terminal and
CPC2 terminal (pin).
39 CPC1
Charge pump booster terminal. The capacitor is connected between this terminal and CP1 terminal (pin).
40 CPC2
Charge pump booster terminal. The capacitor is connected between this terminal and CP2 terminal (pin).
41 VG Charge pump booster output terminal. The capacitor is connected to the GND terminal.
42, 43 VCC Small signal power terminal. The capacitor is connected to the GND terminal.
44 S1 Logic input terminal in 3-phase thread section. Output from pin.
45 S2
46 S3
Pin No. Terminal Name Function
IC601 VHiLV8221T+-1 :PWM/Motor Driver (LV8221T)(1/2)
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