Sony MZ-E30 Service Manual page 65

(4) 3-Phase Driver
HIU
36
HIV
35
HIW
34
The 3-phase motor driver is composed of three half-bridges. This driver also sets into the standby state when Int OE is "L",
and its output is fixed at "L" regardless of the input logic. When Int OE becomes "H", the driver sets into the operating state.
The ON resistors M5 to M10 are each 0.5 Ω (typ.).
Truth Table
Int OE
HIU HIV
L
X X
H L L
H
L L
H L H
H H
L
H
H L
H H L
H H H
H
H H
(5) PWM Drivers 1, 2
PI2
PI1
The PWM driver is a half-bridge driver with 2 channels with different ON resistors. It sets into the standby state when Int OE
is "L", and sets into the operating state when the signal becomes "H". The ON resistors M11 and M12 are 1.0 Ω (typ.) and
M13 and M14 are 0.5 Ω (typ.).
Truth Table
Int OE PI1, 2 PO1, 2
L X L
L
H L
H H H
VC VC VG
3 Phese
Pre driver
Control
Fig. 4 3-Phase Driver
HOV
HIW HOU HOW
L
X L
L
L L
L
H Z
H
L L
L Z
H
Z
L H
H H L
H
L Z
L
H L
VC VC VG
PWM
Pre driver
32
Control
VC VC VG
PWM
Pre driver
33
Control
Fig. 5 PWM Driver
20
24
21
M5 M7 M9
23
M6 M8 M10
25
26
22
L
L
H
Z
H
L
Z
L
L
VPS1
VPS2
31 27
M11 M13
28
30
M12 M14
29
— 69 —
VD1
VD2
Hou
Hov
How
PGND
PGND
PO1
PO2
PGND