BH6799FVM Datasheet PDF - Rohm

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BH6799FVM
Rohm

Part Number BH6799FVM
Description Single-Phase Full-Wave Motor Driver
Page 17 Pages


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TECHNICAL NOTE
DC Brushless Motor Driver Series for Cooling Fans
Low-voltage Single-phase Full-wave
DC Brushless Fan Motor Drivers
BH6766FVM, BD6989FVM, BH6799FVM, BH6789FVM
Description
This is the summary of models that suit for notebook PC cooling fan. They employ Bi-CMOS and Bi-CDMOS process, and
realize low ON resistor, low power consumption, and quiet drive. They also incorporate lock protection and automatic
restart circuit which does not require external capacitor.
Features
1) Soft switched drive
2) Incorporating lock protection and automatic restart circuit(BD6989FVMBH6799FVMBH6789FVM)
3) Rotating speed pulse signal (FG) output (BD6989FVMBH6799FVMBH6766FVM)
4) Lock alarm signal (AL) output (BH6789FVM)
5) PWM speed control (BD6989FVM)
6) MSOP8 compact package
Applications
For compact 5V fan such as notebook PC cooling fan
Lineup
Low voltage
single-phase full wave
PWM speed control
Lock protection circuit
incorporated
FG output BD6989FVM
PWM speed control
not available
Lock protection circuit
incorporated
Lock protection circuit
not incorporated
FG output BH6799FVM
AL output BH6789FVM
FG output BH6766FVM
Jan. 2007



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Absolute maximum ratings
BD6989FVM
Parameter
Symbol
Limit
Supply voltage
Vcc 10
Power dissipation
Pd 585
Operating temperature
Topr -40+105
Storage temperature
Tstg -55+150
Output voltage
Vomax
10
Output current
Iomax
700**
FG signal output current
IFG 10
FG signal output voltage
VFG
10
Junction temperature
Tjmax
150
**
Reduce by 4.68mW/over 25.
(70.0mm×70.0mm×1.6mm glass epoxy board)
This value is not to exceed Pd.
BH6799FVM
Parameter
Symbol
Limit
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Output current
FG signal output current
FG signal output voltage
Junction temperature
Vcc
Pd
Topr
Tstg
Iomax
IFG
VFG
Tjmax
7
585
-40+105
-55+150
1000**
5
7
150
Reduce by 4.68mW/over 25.
(70.0mm×70.0mm×1.6mm glass epoxy board)
**
This value is not to exceed Pd.
BH6789FVM
Parameter
Symbol
Limit
Supply voltage
Vcc 7
Power dissipation
Pd 585
Operating temperature
Topr -40+105
Storage temperature
Tstg -55+150
Output current
Iomax
1000**
AL signal output current
IAL 5
AL signal output voltage
VAL 7
Junction temperature
Tjmax
150
**
Reduce by 4.68mW/over 25.
(70.0mm×70.0mm×1.6mm glass epoxy board)
This value is not to exceed Pd.
Unit
V
mW
V
mA
mA
V
Unit
V
mW
mA
mA
V
Unit
V
mW
mA
mA
V
2/16



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BH6766FVM
Parameter
Symbol
Limit
Supply voltage
Vcc 7
Power dissipation
Pd 585
Operating temperature
Topr -40+105
Storage temperature
Tstg -55+150
Output current
Iomax
600**
FG signal output current
IFG 5
FG signal output voltage
VFG
7
Junction temperature
Tjmax
150
**
Reduce by 4.68mW/over 25.
(70.0mm×70.0mm×1.6mm glass epoxy board)
This value is not to exceed Pd.
Unit
V
mW
mA
mA
V
OPERATING CONDITIONS
BD6989FVM
Parameter
Operating supply voltage range
Hall input voltage range
Symbol
Vcc
VH
BH6799FVM, BH6789FVM
Parameter
Operating supply voltage range
Hall input voltage range
Symbol
Vcc
VH
BH6766FVM
Parameter
Operating supply voltage range
Hall input voltage range
Symbol
Vcc
VH
Limit
2.98.0
0Vcc-1.8
Limit
2.06.0
0.4Vcc-1.1
Limit
2.06.0
0.4Vcc-1.1
Unit
V
V
Unit
V
V
Unit
V
V
3/16



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ELECTRICAL CHARACTERISTICS (Unless otherwise specified Ta=25,Vcc=5V)
BD6989FVM
Parameter
Symbol
Limit
Unit
Min. Typ. Max.
Conditions
Characteristics
Circuit current
Icc - 4 6 mA
Fig.1
Input offset voltage
VHOFS -
- ±6 mV
-
PWM input H level
VPWMH 2.5 - Vcc V
Fig.2
PWM input L level
VPWML 0
- 0.7 V
Fig.3
Input frequency
FPWM 0.02 -
50 kHz
-
Output voltage
Io250mA
VO - 0.4 0.6 V
FIg.4,5
Upper and Lower total
Input-output Gain
GIO 45 48 51 dB
-
FG low voltage
VFGL
-
- 0.3 V IFG=3mA
Fig.6
FG leak current
IFGL - - 20 μA VFG=10V
Input hysteresis voltage VHYS ±5 ±10 ±15 mV
Fig.7
Lock detection ON time
TON 0.35 0.50 0.65 sec
Fig.8
Lock detection OFF time TOFF 3.5 5.0 6.5 sec
Fig.9
BH6799FVM, BH6789FVM
Parameter
Symbol
Limit
Unit
Min. Typ. Max.
Conditions
Characteristics
Circuit current
Icc - 5 8 mA
Fig.10
Input offset voltage
VHOFS -
- ±6 mV
-
Output voltage
VO - 0.32 0.49 V Io250mA
Fig.11,12
Upper and Lower total
Input-output Gain
GIO 45 48 51 dB
-
FG low voltage
VFGL
-
- 0.3 V IFG=3mA
Fig.13
AL low voltage
VALL
-
- 0.3 V IAL=3mA
Fig.14
Input hysteresis voltage VHYS ±5 ±10 ±15 mV
Fig.15
Lock detection ON time
TON 0.35 0.50 0.65 sec
Fig.16
Lock detection OFF time TOFF 3.5 5.0 6.5 sec
Fig.17
Hall bias voltage
VHB 1.1 1.3 1.5 V IHB=5mA
Fig.18
BH6766FVM
Parameter
Circuit current
Input offset voltage
Output voltage
Input-output Gain
FG low voltage
Input hysteresis voltage
Hall bias voltage
Symbol
Limit
Unit
Min. Typ. Max.
Conditions
Characteristics
Icc - 5 8 mA
Fig.19
VHOFS -
- ±6 mV
-
Io250mA
VO - 0.6 0.9 V
Fig.20,21
Upper and Lower total
GIO 45 48 51 dB
-
VFGL
-
- 0.3 V IFG=3mA
Fig.22
VHYS ±5 ±10 ±15 mV
Fig.23
VHB 1.1 1.3 1.5 V IHB=5mA
Fig.24
4/16



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