bh6799fvm ROHM Co. Ltd., bh6799fvm Datasheet - Page 7

• Manufacturer Part Number: bh6799fvm
• Description: Dc Brushless Motor Driver Series For Cooling Fans Low-voltage Single-phase Full-wave Dc Brushless Fan Motor Drivers
• Manufacturer: ROHM Co. Ltd.

●Block diagram, application circuit, and pin assignment(Constant etc are for reference)
Incorporates soft switching
function. Adjust at an optimum
value because gradient of
switching of output waveform
depends on hall element output.
P.10
◎BD6989FVM
◎BH6799FVM, BH6789FVM
OSC :
Internal reference oscillation circuit
TSD :
Thermal shutdown (heat rejection circuit)
Take a measure against Vcc
voltage rise due to reverse
connection of power supply
and back electromotive force.
P.12
Incorporates soft switching
function. Adjust at an optimum
value because gradient of
switching of output waveform
depends on hall element output.
P.10
PIN No.
PIN No.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
HALL
HALL
Terminal name
Terminal name
FG/AL
OUT2
OUT1
OUT2
OUT1
PWM
GND
GND
OUT2
Vcc
Vcc
1
2
3
4
FG
HB
H+
H+
H-
H-
H+
HB
H-
OUT2
Vcc
H+
1
2
3
H-
4
Protection
OSC
Lock
Bias
Hall
Protection
500Ω
500Ω
TSD
Motor output terminal 2
Power supply terminal
Hall input terminal+
Hall input terminal-
FG signal output terminal
PWM signal input terminal
Motor output terminal 1
GND terminal
Motor output terminal 2
Hall input terminal+
Hall bias terminal
Hall input terminal-
FG/AL signal output terminal
Power supply terminal
Motor output terminal 1
GND terminal
OSC
Lock
+
-
7/16
500Ω
500Ω
+
+
-
-
150kΩ
150kΩ
TSD
M
150kΩ
Control
150kΩ
+
+
-
-
+
-
GND
OUT1
Vcc
FG/AL
8
7
6
5
Function
Function
VCC
90kΩ
10kΩ
M
OUT1
GND
PWM
OSC :
Internal reference oscillation circuit
TSD :
Thermal shutdown (heat rejection circuit)
8
7
6
FG
5
Speed control by PWM
input is enabled. Input
frequency must be 50kHz
at the maximum.
This is an open collector
output. Connect a pull-up
resistor.
P.11
P.13
This is an open collector
output. Connect a pull-up
resistor.
P.13
Take a measure against Vcc
voltage rise due to reverse
connection of power supply
and back electromotive force.
P.12