Document
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(BD6989FVM、BH6799FVM、BH6789FVM) 3) Rotating speed pulse signal (FG) output (BD6989FVM、BH6799FVM、BH6766FVM) 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
●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
◎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 2.9~8.0 0~Vcc-1.8
Limit 2.0~6.0 0.4~Vcc-1.1
Limit 2.0~6.0 0.4~Vcc-1.1
Unit V V
Unit V V
Unit V V
3/16
●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
Io=250mA
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 Io=250mA
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
-
Io=250mA
VO - 0.6 0.9 V
Fig.20,21
Upper and Lowe.