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6-channel Combo driver IC
BD7907FS
Description Dimension (Units : mm)
Features
Applications
01W138A
January, 2002
Absolute Maximum Ratings (Ta=25˚C)
SSOP-A54
0.1
11.4
±0.2
13.4
±0.3
2.2±
0.1
0.10.8
1 27
54 28
22.0±0.2
4.0±
0.2
6.0±0.2
0.36±0.1
0.15±0.1
0.3M
in.
Power MOS supply voltage
Pre/BTL power supply voltage
PWM control supply voltage
Power dissipation
Operating temperature range
Storage temperature range
Parameter Symbol Limits Unit
DVCC
VCC, SLVDD, AVM
SPVM1,2,SLRNF1,2
Pd
Topr
Tstg
15
15
7
2.6
+85–35 ~
+150–55 ~
˚C˚C
V
V
V
W*1
BD7907FS is a 6-channel driver IC that integrates alldrivers necessary for CD-ROM, and DVD-ROM systemsinto a single chip. The built-in 2-channel sled motordriver is used for the stepping motor. Low heat operation can be achieved by applying the PWM driving system for sled and spindle motor drivers.
1) Motor drivers for spindle, sled (2-channel) and loading, and actuator drivers for tracking are all integrated into a single chip. 2) ON/OFF for each driver, brake mode switching of spindle and stand-by mode switching can be controlled by 2-wire serial data. 3) Built-in triangular-wave generator 4) SSOP-A54 package 5) Built-in thermal shut-down circuit<Spindle driver> 6) Highly efficient by applying the PWM drive and Low ON resistance POWER MOSFET 7) Built-in current limit, hall bias, short brake, FG 3-phase synthesis output, and reverse protection circuit<Sled motor driver> 8) Highly efficient due to the PWM drive 9) Built-in 2-channel for the stepping motor<Actuator, loading driver> 10) Low noise due to the linear BTL driver and smooth spin
CD-ROM, DVD-ROM, and any other equipment driven by optical DISC
*Derating : 20.8mW/˚C for operation above Ta=25˚C PCB (70mm ¥ 70mm ¥ 1.6mm glass epoxy board)
Application Circuit
Feed motor driver
15
0.8
—
0.8
20
2.4
—
1.2
40
1.0
3.2
0.94
50
3.0
0.95
1.42
65
1.2
4.2
1.08
90
3.6
1.7
1.64
mV
A/V
ΩA
mV
A/V
ΩA
VDZSL
gmSL
RONUSL
ILIMSL
VDZSP
gmSP
RONUSP
ILIMSL
Input dead zone (One-side)
I/O gain
Output ON resistance
Output limit current
Spindle driver <Torque command I/O>
Input dead zone (One-side)
I/O gain
Output ON resistance
Output limit current
SLRNF=0.5ΩIo=500mA (Top+Bottom)
SLRNF=0.5Ω
SPRNF=0.33ΩIp=500mA (Top+Bottom)
SPRNF=0.33Ω
Electrical Characteristics
–50
—
16.0
–50
—16.0
0
0.9
17.5
0
1.5517.5
50
1.6
19.0
50
2.219.0
mV
V
dB
mV
VdB
VOFFT
VOHFT
GVFT
VOFLD
VOHLDGVLD
Actuator driver
Output offset voltage
Output saturation voltage
Voltage gain
Loading driver
Output offset voltage
Output saturation voltageVoltage gain
Io=500mA (Top+Bottom)
Io=500mA (Top+Bottom)
Symbol Min. Max. Unit ConditionsTyp.Parameter
(Unless otherwise noted; Ta=25˚C, SLVDD=VCC=12V, DVCC=AVM=5V, VC=1.65V, SPRNF=0.33Ω, SLRNF=0.5Ω)
SLVM=12V
VCC=12V
HA
LL1
HA
LL2
HA
LL3
TRACKING FOCUSLOADING
M
µ -COM
SLEDIN2
SLEDIN1
µ -COMLOADING
IN
VCSPINDLE
IN
3FG
TRACKINGIN
SLED2
AVM=5V
SLED1
FOCUSIN
STM
SPVM=12V
DVCC=5V
SPRNF
16
14
39
41
42
43
27
26
25
24
22
21
20
1918
17
11
10987654321
44
45
46
47
48
49
50
51
52
53
54
28
29
30
31
32
33
34
35
36
37
38
3-phaseMATRIX
FG REVERSEDETECT
CurrentLIMIT
TSD
STBY/BRAKE
CONTROL
40
15
13
12
23
FF
PRELOGIC
PRELOGIC
LEVELSHIFT
LEVELSHIFT
LEVELSHIFT
HALLBIAS
+-
PolarityCOMP
OSC
CurrentCOMP
+-
3FG
+-
+-
+-
+-
OSC
FF
FF
LIMIT
LIMITBD7902FS
PWMOUT
47K
47K94K
94K
94K
94K
47K
47K
47K
94K
15K
15K
SLR
NF
2
SLR
NF
1
SPINDLE5V
Power MOS supply voltage1 SPVM1,2 VCC— — V
V
VV
Recommended Operating Conditions (Ta=25˚C)Parameter Min. Max. UnitTyp.Symbol
Pre-driver supply voltagePower driver supply voltage
PWM control supply voltage
SLVDD,VCC
AVMDVCC
12
5.05.0
AVM
4.34.3
14
6.0
V
Power MOS supply voltage2 — —SLVDDSLRNF1,2
Vcc
∗2
∗2
∗2 SPVM1,2 must be established with the same voltage of Vcc and, SLRNF1,2 must be established with the same voltage of SLVDD.
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