LV8804V Sanyo Semiconductor Corporation, LV8804V Datasheet - Page 5

• Manufacturer Part Number: LV8804V
• Description: PC and Server Fan Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

Pin Function
Pin No.
13, 15,
25, 31
5, 6,
36
10
1
2
3
4
7
8
9
COM
COMIN
FIL
VREG
NC
F/R
CTL
MINSP
SOFTST
Pin name
Motor middle point connection.
Motor position detection comparator filter
pin. A capacitor must be connected between
this pin and the FIL pin (pin 2).
Motor position detection comparator filter
pin. A capacitor must be connected between
this pin and the COMIN pin (pin 5).
Regulator voltage (5V) output.
A capacitor must be connected between
these pins and ground.
No connection. These pins are not
connected with the internal parts.
Motor rotation direction switching. A
high-level input causes current to flow into
the motor in the order of U, V, and W and a
low-level input in the order of U, W, and V.
Changing the order of current application
turns the motor in the opposite direction.
Motor control voltage input.
When the control voltage is higher than 3 V
(3V < CTL voltage), the motor stops.
The motor speed is controlled by varying the
control voltage within the range of 3V to 1V
(3V > CTL voltage > 1 V). When the control
voltage becomes lower that 1V (1 V > CTL
voltage), the current limit set by the RF
resistor is reached.
Minimum speed setting voltage input.
The minimum speed of the motor can be set
by resistor-dividing the regulator voltage and
feeding the resultant voltage that is within the
range of 1V to 3V (1 V < MINSP < 3V).
Soft start time setting.
The motor can be started smoothly by
connecting a capacitor between this pin and
ground.
Function
LV8804V
VREF
VREG
7
36
VG
V CC
500Ω
100kΩ
15kΩ
VREG
VREG
9
Reverse signal
Forward signal
500Ω
Equivalent circuit
10
500Ω
1
8
2
Continued on next page.
Forward/reverse
switching signal
No.A1407-5/10
3
4