LB1975(2003) データシートの表示（PDF） - SANYO -> Panasonic

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LB1975
(Rev.:2003)

DC Fan Motor Driver

SANYO -> Panasonic 

LB1975

Continued from preceding page.

Pin No. Pin name

15

GND1

12

GND2

Pin voltage

Pin function

Ground for blocks other than the

output block

17

FG1

Speed pulse output pin 1 with built-in

pull-up resistor

0.0 V to VCC

Speed pulse output pin 2 with built-in

16

FG2

pull-up resistor

Equivalent circuit

VCC

10 kΩ

16 17

22

IN1+

23

IN1–

20

21

18

IN2+

IN2–

IN3+

1.5 V to

VCC – 1.5 V

Hall input pin

IN+ > IN– : High input

IN+ < IN– : Low input

19

IN3–

VCC

18

300 Ω

20

22

A11957

19

300 Ω

21

23

VCC

This pin sets the PWM oscillation

26

OSC

1.0 V to VCC frequency. Connect a capacitor

between this pin and ground.

A11958

2 V 94 µA

200 Ω

26

2.1 kΩ

Output duty cycle control pin

• VCTL ≤ VCTL1

Duty cycle 0%

27

VCTL

0.0 V to 6.7 V • VCTL1 < VCTL < VCTL2

Duty cycle is controlled by VCTL

• VCTL ≥ VCTL2

Duty cycle 100%

31 kΩ

A11959

VCC

2.35 V

40 kΩ

27

A11960

Continued on next page.

No. 6087-7/12

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