LV8121V SANYO [Sanyo Semicon Device], LV8121V Datasheet - Page 6

• Manufacturer Part Number: LV8121V
• Description: For Fan Motor 3-phase Brushless Motor Driver
• Manufacturer: SANYO [Sanyo Semicon Device]

Pin Function
Pin No.
10
1
2
3
4
5
6
7
8
9
Pin name
PWM
LIM
CTL
S/S
IN3 -
IN3 +
IN2 -
IN2 +
IN1 -
IN1 +
Pin to set the PWM oscillation frequency.
Connect a capacitor between this pin and GND1.
A frequency of about 19kHz can be set by using
a 1800pF capacitor.
Pin to set the minimum output duty.
A minimum output duty can be set by inputting a fixed
voltage to the LIM pin through resistor division of VREG.
Connect the LIM pin to GND1 if this pin is not used, then the
minimum output duty becomes 0 %.
Pin to control the output duty.
The output duty is determined by the result of comparing
the CTL pin voltage with the PWM oscillation waveform.
When the CTL pin is open, the output duty becomes 100%.
Therefore, connect a pull-down resistor to prevent open.
Start / Stop control pin.
Low : 0V to 1.0V
High : 2.0V to VREG
Goes high when left open.
Low for start.
The hysteresis width is about 0.35V.
Hall input pins.
The input is seen as the high level input when IN + > IN - , and
as the low level input for the opposite state.
If noise on the Hall signals is a problem, connect a capacitor
between the corresponding IN + and IN - inputs.
Function
LV8121V
VREG
VREG
5
7
9
VREG
VREG
VREG
Equivalent circuit
100kΩ
10kΩ
500Ω
500Ω
Continued on next page.
950Ω
200Ω
2
3
No.A2135-6/14
4
10
1
6
8