Fairchild FAN8412M, FAN8413M service manual

www.fairchildsemi.com

FAN8412M/FAN8413M

2 Phase Half Wave BLDC Motor Predriver

Features

• A wide range of operation voltage: 4V to 28V

• Locked motor protection with open collector
alarm out or speed out and auto retry

• Compact package: 8-SOP-225

Description

The FAN8412M/FAN8413M is a monolithic integrated
circuit, and suitable for DC cooling fan motors predriver.

8-SOP-225

1

Typical Applications

• DC cooling fan motor

©2004 Fairchild Semiconductor Corporation

Ordering Information

Device Package Operating Temp.

FAN8412M 8-SOP-225 −40°C ~ 95°C

FAN8412MX 8-SOP-225 −40°C ~ 95°C

FAN8413M 8-SOP-225 −40°C ~ 95°C

FAN8413MX 8-SOP-225 −40°C ~ 95°C

FAN8412M_NL 8-SOP-225 −40°C ~ 95°C

FAN8412MX_NL 8-SOP-225 −40°C ~ 95°C

FAN8413M_NL 8-SOP-225 −40°C ~ 95°C

FAN8413MX_NL 8-SOP-225 −40°C ~ 95°C

Note

X : Tape & Reel

NL : Lead Free

Rev.1.0.3

FAN8412M/FAN8413M

Block Diagram

V

1

IN+

2

AL /

TACO

3

IN-

4

CC

Commutation

& Control

OUT

OUT

GND

B

8

A

7

LD

6

5

Pin Definitions

Pin Number Pin Name I/O Pin Function Description Remark

1V

CC

2IN+ A Hall input + -

3

AL O Alarm output (For FAN8412M) Open Collector

TACO O Speed output (For FAN8413M) Open Collector

4IN− A Hall input − -

5 GND P Ground -

6LDA

7OUT

8OUT

A

B

2

P Supply voltage -

Triangle pulse generator for lock detector
and automatic restart

A Motor output A -

A Motor output B -

-

Equivalent Circuits

Description Pin No. Internal Circuit

FAN8412M/FAN8413M

OUT

A

OUT

B

AL /

TACO 3

7

8

6 Lock detector

Vcc

Commutation

7
8

3

Lock detector

& Automatic

restart

Commutation

LD 6

IN+ 2

IN- 4

2

V

V

LDCP

LDCL

Vcc

4

3

FAN8412M/FAN8413M

Absolute Maximum Ratings (Ta = 25°C)

Parameter Symbol Value Unit

Maximum Power Supply Voltage V

Maximum Power Dissipation

Thermal Resistance

note1

note1

Maximum Output Voltage V

Maximum Output Current I

Alarm Output Current I

Alarm Output Withstanding Voltage V

TACO Output Current I

TACO Output Withstanding Voltage V

Operating Temperature T

Storage Temperature T

Note1:

PCB Condition: Thickness (1.6mm), Dimension (76.2mm * 114.3mm)
Refer: EIA/J SED 51-2 & EIA/J SED 51-3
Should not exceed P

or ASO value

D

CCMAX

P

DMAX

Θ

JA

OMAX

OMAX

AL

AL

TAC O

TAC O

OPR

STG

32 V

600 mW

208 °C/W

36 V

0.07 A

10 mA

36 V

10 mA

36 V

−40 ~ 95 °C

−55 ~ 150 °C

Power Dissipation Curve (Air condition = 0m/s)

Power dissipation (W)

0.6

25 150

Recommended Operating Conditions (Ta = 25°C)

Parameter Symbol Min. Typ. Max. Unit

Function Compensation Operating Voltage V

CC

4.0 − 28.0 V

Ambient temperature, Ta (°C)

4

FAN8412M/FAN8413M

Electrical Characteristics

(Ta=25°C, VCC=12V unless otherwise specified)

Parameter Symbol Conditions Min. Typ. Max. Unit

TOTAL

Supply Current I

HALL AMPLIFIER INPUT RANGE

Pin2,4 Hall Input Range V

Pin2,4 Hall Input Offest V

LOCK DETECTOR & AUTO RESTART

Pin6 Lock Detector Charging Current I

Pin6 Lock Detector Discharging Current I

Pin6 Lock Detector Charging/Discharging Ratio R

Pin6 Lock Detector Capacitor Clamp Voltage V

Pin6 Lock Detector Capacitor Comparator Voltage V

OUTPUT STAGE

Pin7, 8 Output High Level Voltage V

Pin7, 8 Output Low Level Voltage V

AL / TACO OUTPUT

Pin3 Alarm Output Low Level Voltage V

Pin3 Alarm Output Current Capacity I

Pin3 Taco Output Low Level Voltage V

Pin3 Taco Output Current Capacity I

TAC OLIO

TAC OL

CC

HDC

HOF

LDC

LDD

CD

LDCL

LDCP

OH

OL

ALL

AL

When output is off. - 3.2 5.0 mA

- 1 - Vcc-2 V

-15--mV

VLD=1.5V 2.2 3.8 5.7 µA

VLD=1.5V 0.4 0.88 1.6 µA

RCD=I

LDC/ILDD

357−

- 2.54 2.94 3.34 V

- 0.54 0.74 0.94 V

IO=10mA 10 10.5 - V

IO=10mA - - 0.5 V

IO=10mA - 0.2 0.5 V

VAL=2.0V 8 - - mA

=10mA - 0.2 0.5 V

V

=2.0V 8 - - mA

TACO

5