FAN8045G3 View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

View to exact match

FAN8045G3

4-CH Motor Driver (5 Input & 4 Output)

Fairchild Semiconductor 

FAN8045G3

Application Information

1. MUTE,REF & SW45 Function

INPUT

SW45

H

H

H

H

H

L

L

L

MUTE12 MUTE3 MUTE4

H

H

-

H

L

-

H

H

-

L

H

-

L

L

-

-

-

L

-

-

H

-

-

H

REF1

H

H

L

H

H

-

-

-

REF2

-

-

-

-

-

-

H

L

CH12

ON

ON

OFF

OFF

OFF

OFF

OFF

OFF

BTL

CH3

ON

OFF

OFF

ON

OFF

OFF

OFF

OFF

OUTPUT

PRE-AMP

CH4

IN5

IN5

OFF

OFF

OFF

OFF

IN4

OFF

CH4

ON

ON

OFF

ON

ON

OFF

OFF

OFF

CH5

ON

ON

ON

ON

ON

ON

ON

ON

OP

ON

ON

OFF

ON

ON

OFF

OFF

OFF

2. TSD Function

• When the chip temperature reaches to 167°C by abnormal condition,

the TSD circuit is activated

• During TSD Function is activated, OP-AMP Output (pin 6) remains

below 0.5V. (TSD monitoring function).

• This makes the bias current of the output drivers shut down, and all

the output drivers are on cut-off state. Therefore the chip temperature

begins to decrease.

• When the chip temperature falls to 63°C, the TSD circuit is

deactivated and the output drivers start to operate normally.

SVCC

IREF

R1

Q0

R2

Hysteresis Ihys

R3

Output driver

bias

3. Notice

• If REF1(pin1) or REF2(pin25) is lower than 0.7V, BTL Output is off.

• Under Voltage Protecton Function. ( If SVcc is lower than 3.8V, Chip is disable. Hysterisis is 0.2V)

• Mute ON BTL OutPut Voltage is as followed:

- Mute ON BTL Output (CH1,2) = (PVcc1 ) / 2

- Mute ON BTL Output (CH3,4) = ((PVcc2-0.6) / 2

• Each output to output and output to GND short should be kept away.

9

Share Link: