LB1975_08 SANYO [Sanyo Semicon Device], LB1975_08 Datasheet - Page 6

• Manufacturer Part Number: LB1975_08
• Description: For Fan Motor 3-phase Brushless Motor Driver
• Manufacturer: SANYO [Sanyo Semicon Device]

Continued from preceding page.
Pin No.
13
14
11
15
12
17
16
22
23
20
21
18
19
26
4
6
7
8
F/R
OUT1
OUT2
OUT3
RF
V M
GND3
GND1
GND2
FG1
FG2
IN1 +
IN1 -
IN2 +
IN2 -
IN3 +
IN3 -
OSC
Pin name
0.0V to V CC
0.0V to V CC
0.0V to V CC
0.0V to V CC
1.0V to V CC
V CC − 1.5V
Pin voltage
1.5V to
Forward/reverse pin.
Low: forward
High or Open: reverse
Typical threshold voltage for
V CC = 5V:
Output pin 1.
Output pin 2.
Output pin 3.
Output current detect pin.
Connect resistor Rf between this pin and
ground. Output current is limited to value set
with V RF /Rf. (Current limiter operation)
Output block power supply.
Output block ground.
Ground for blocks other than the output
block.
Speed pulse output pin 1 with built-in pull-up
resistor.
Speed pulse output pin 2 with built-in pull-up
resistor.
Hall input pin.
IN + > IN - : High input
IN + < IN - : Low input
This pin sets the PWM oscillation frequency.
Connect a capacitor between this pin and
ground.
approx. 2.8V (low to high)
approx. 2.3V (high to low)
Function
LB1975
0.5V
V CC
V CC
V CC
18
20
22
V CC
V CC
300Ω
Equivalent circuit
10kΩ
200Ω
2V
200Ω
2.1kΩ
94µA
Continued on next page.
300Ω
16 17
3.8kΩ
20kΩ
No.6087-6/10
19
21
23
26
4
14
13
6
7
8