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3. Pin function (3/3)
Symbol
I/O
Pin No.
91
SRDR
O
92
SFDR
O
93
SPRD
O
94
SPFD
O
95
FGIN
I
96
TEST1
I
97
TEST2
I
98
TEST3
I
DVSS
-
99
EFMO
O
100
BD7910FV-X (IC450) : Pre driver
1.Block diagram
20
19
-
+
+
Vregin
1
2
2.Pin function
Pin
Symbol
I/O
No.
1
Vreg IN
I
Regulator input and regulator
power supply
2
Reg GN
-
Regulator GND
3
NC
-
Non connect
4
VG
I
Voltage input for power MOS drive
5
SVCC
O
EFM high level output voltage
6
PDGND
-
Pre-driver GND
7
EFM
I
EFM signal input
8
MUTE
I
Mute control (Low active)
9
NC
O
Non conncet
10
NC
O
Non connect
Sled servo drive PWM output. ( )
Sled servo drive PWM output. (+)
Spindle servo drive output. (PWM ( ) or polarity)
Spindle servo drive output. (PWM (+) or PWM absolute value)
Spindle CAV servo FG input.
Test pin. Connect to GND.
Test pin. Connect to GND.
Test pin. Connect to GND.
Digital ground.
Low when playback ; EFM (encoded data) output when recording.
18
17
16
15
14
-
VG
Pre driver
SVcc
3
4
5
6
Function
Function
13
12
11
Mute
EFM
7
8
9
10
Pin
Symbol
I/O
No.
-
11
NC
Non connect
O
12
VOD2
Sync.output (Lower power MOS,drain)
-
13
VSS
"H"bridge GND (Lower power MOS,source)
O
14
VOD1
Sync.output (Lower power MOS,drain)
O
15
VOS1
Source output (Upper power MOS,source)
-
16
VDD
"H" bridge power supply terminal
(Upper power MOS,source)
O
17
VOS2
Source output (Upper power MOS,source)
O
18
Reg DRV
External PNP drive output for regulator
O
19
Reg OUT
Reglator output (Emitter follower output)
-
20
Reg NF
Regulator feedbaack terminal
UX-F70MD/UX-F72MD
Function
1-55
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