bh6799fvm ROHM Co. Ltd., bh6799fvm Datasheet - Page 11

• 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.

●Equivalent circuit
4) PWM input ＜BD6989FVM＞
H+
H-
H+
H-
Rotation speed of motor can be changed by controlling ON/OFF of the upper output depending on duty of the signal
input to PWM terminal.
When the voltage input to PWM terminal applies H logic : normal operation
When PWM terminal is open, H logic is applied.
PWM terminal has hysteresis of 400mV (typ.).
Resistance is a typical value.
◎BD6989FVM
◎BH6799FVM/BH6789FVM/ BH6766FVM
1) Hall input terminal, Motor output terminal
1) Hall input terminal, Motor output terminal
1kΩ
1kΩ
500Ω
500Ω
500Ω
500Ω
Vcc
Vcc
1kΩ
OUT2
OUT1
PWM
1kΩ
FG
H+
150kΩ
150kΩ
OUT1
OUT1
Fig.30 Timing chart in PWM control
150kΩ
150kΩ
OUT2
OUT2
L logic : H side output is off
Vcc
GND
Vcc
GND
11/16
PWM
2)PWM signal input terminal
3)FG output terminal
2) Hall bias terminal
3) FG output terminal or
AL output terminal
Vcc
10kΩ
90kΩ
FG
HB
FG
AL
or
Vcc