1/3
Structure
Silicon Monolithic Integrated Circuit
Product series
6ch Power Driver for CD-ROM,DVD-ROM
Type
BD7998EFS
Function
・The spindle driver and the SLED driver can highly effective drive with PWM
drive system.
・The actuator driver and the loading driver are liner BTL drive system and are
achieving a low noise power.
特
長
○Absolute maximum ratings
Parameter
Symbol
Limits
SPVM1,2
POWER MOS power supply voltage
15
Unit
#1
V
SLRNF1,2
Preblock/BTL powerblock power supply voltage
PWM control block power supply voltage
Vcc=SLVDD,AVM
15
V
DVcc
7
V
Power dissipation
Pd
Operating temperature range
Storage temperature
Joint part temperature
2.0
#2
W
Topr
-40~85
℃
Tstg
-55~150
℃
Tjmax
150
℃
#1 POWER MOS output terminals (17~20, 30, 33, 35pin) is contained.
#2 PCB (70mm×70mm×1.6mm,occupied copper foil is less than 3%,glass epoxy standard board) mounting.
Reduce power by 16mW for each degree above 25℃.
○Recommended operating conditions (Ta=-40~+85℃)
〔Set the power supply voltage taking allowable dissipation into considering〕
Parameter
Symbol
MIN
TYP
Spindle driver powerblock Power supply voltage
SPVM
-
Vcc
#3
Sled motor driver powerblock Power supply voltage
SLVM
-
Vcc
#3
Preblock / Loading driver powerblock Power supply voltage
MAX
Unit
-
V
-
V
SLVDD=Vcc
AVM
12
14
V
Actuator driver powerblock Power supply voltage
AVM
4.3
5.0
Vcc
V
PWM control block power supply voltage
DVcc
4.3
5.0
6.0
V
Spindle driver output current
Iosp
-
1.2
Actuator/sled motor/loading motor driver output current
Ioo
-
0.5
2.5
#4
0.8
A
A
#3 Set the same supply voltage to SPVM,SLVM and Vcc.
#4 The current is guaranteed 3.0A in case of the current is turned on/off in a duty-ratio of less than 1/10 with a maximum
on-time of 5msec
This product isn’t designed for protection against radioactive rays.
REV. A
2/3
○Electrical characteristics
(Unless otherwise noted, Ta=25℃, Vcc=SPVM=SLVM=12V, DVcc=AVM=5V,
SPRNF=0.33Ω, SLRNF=0.5Ω, VC=1.65V, RL=8Ω, RLSP=2Ω)
Circuit current
Parameter
Symbol
MIN.
TYP.
MAX.
Unit
Quiescent current1
IQ1
-
12
20
mA
Vcc(Loading OFF)
Quiescent current2
IQ2
-
7
12
mA
Vcc(Loading ON)
Quiescent current3
IQ3
-
2.2
4.4
mA
DVcc
Standby-on current1
IST1
-
0.18
0.4
mA
Vcc
DVcc
Standby-on current2
Input dead zone (one side)
Sled driver
block
Input output gain
block
block
Loading driver
block
Others
0.18
0.4
mA
40
65
mV
gmSL
0.8
1.0
1.2
A/V
SLRNF=0.5Ω
RONSL
-
2.65
3.8
Ω
IL=500mA
Output limit current
ILIMSL
0.91
1.05
1.19
A
SLRNF=0.5Ω
fosc
-
100
-
kHz
Input dead zone (one side)
VDZSP
20
50
90
mV
Input output gain
gmSP
2.4
3.0
3.6
A/V
SPRNF=0.33Ω
Output On resistor(top and bottom)
RONSP
-
0.9
1.7
Ω
IL=500mA
Output limit current
ILIMSP
1.30
1.51
1.73
A
SPRNF=0.33Ω
fosc
-
100
-
kHz
VOFFT
-50
0
50
mV
PWM frequency
Actuator driver
-
15
Output On resistor(top and bottom)
PWM frequency
Spindle driver
IST2
VDZSL
Condition
Output offset voltage
Output saturation voltage
VOFT
-
0.95
1.75
V
Voltage gain
GVFT
16.0
17.5
19.0
dB
VOFLD
-50
0
50
mV
Output offset voltage
Output saturation voltage
VOLD
-
2.45
3.5
V
Voltage gain
GVLD
16.0
17.5
19.0
dB
VC drop-muting
VMVC
0.4
0.7
1.0
V
Vcc drop-muting
VMVcc
3.4
3.8
4.2
V
IL=500mA
IL=500mA
○ Package outlines
B D 7 9 9 8 E F S
Lot No.
(UNIT : mm)
Drawing No. : EX195-5002
REV. A
3/3
○Block diagram / Application circuit
AVM
TKO+
TKIN
LEVEL
SHIFT
5V
TKO-
FCO+
FCIN
LEVEL
SHIFT
FCO-
AGND
LDO+
LDIN
LEVEL
SHIFT
LDO-
M
Vcc
12V
12V
SLIN1
PRE
Logic
FF
M
LIMIT
OSC
SLIN2
PRE
Logic
FF
LIMIT
DGND
DVcc
HU+
HUREVERSE
DETECT
HV+
HV-
5V
HW+
HW-
100kΩ
FG
5V
FG
HB
HB
SPVM1, SPVM2
U
SPIN
V
3-phase
MATRIX
W
SPGND1, SPGND2
FF
Current
LIMIT
OSC
SPRNF
VC
CTL1
CTL2
STBY/
BRAKE
CONTROL
T.S.D.
REV. A
12V
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
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The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
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and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
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range of the specifications or due to non-compliance with the NOTES specified in this catalog.
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Appendix1-Rev2.0