Diodes AM4953 User Manual

BTL Drive Single-phase Full-wave Fan Motor Driver AM4953

Data Sheet

General Description

The AM4953 is a single-phase BTL output fan motor
driver designed by bipolar process. This IC
features high efficiency, silent operation and includes
lock shutdown and automatic restart functions. When
the motor is under lock condition, the lock
shutdown function turns off the output current. When
the lock condition is removed, the IC will
restart automatically and allow DC fan to run. It is
applied for high reliability and low noise application,
such as personal computers, notebook, car audio,
CPU cooling systems and power supplies in
consumer electronics systems.

The AM4953 is available in MSOP-10, SSOP-10,
MSOP-8, SOIC-8 and PSOP-8 packages.

Features

• BTL Output Single-phase Full-wave Linear
Drive (Gain Resistor=1k to 360kΩ, Gain=51dB)

• Support Low-voltage Drive and Feature a Wide
Usable Voltage Range (2.2V to 16V)

• Low Saturation Output (High Side and Low Side

Saturation Voltage): V
I

=300mA)

OUT

• Built-in Lock Protection and Automatic Restart

Circuits

• Built-in FG/RD Output

• Built-in Hall Sensor Bias (V

• Thermal Protection Circuit

• Small-sized, High Thermal Capacity Package

SAT_TOTAL

=1.2V (typical,

=1.45V)

HB

Applications

• Notebook, Personal Computers

• Power Supplies in Consumer Electronics, Car
Audio

• CPU Cooling Systems

MSOP-10 SSOP-10 MSOP-8

SOIC-8 PSOP-8

Figure 1. Package Types of AM4953

Apr. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

1

Data Sheet

BTL Drive Single-phase Full-wave Fan Motor Driver AM4953

Pin Configuration

MM Package M8 Package
(MSOP-10) (MSOP-8)

IN+

HB
IN­CT

OUT1

IN+

IN-

CT

OUT1

1
2
3
4
5

10

RD
FG

9

VCC

8

OUT2

7

GND

6

GS Package
(SSOP-10)

1

IN+

HB

2

IN-

3

CT

4

OUT1

5

M Package MP Package
(SOIC-8) (PSOP-8)

8

1

2

7

FG/RD

VCC

OUT2

3

6

GND

4

5

Figure 2. Pin Configuration of AM4953 (Top View)

IN+

1

IN-

2

3

CT

RD

FG

VCC

OUT2

GND

1

2

3

4

4

8

7

6

5

OUT1

10

9

8

7

6

IN+

IN-

CT

OUT1

8

7

6

5

FG

VCC

OUT2

GND

RD
VCC

OUT2
GND

Apr. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

2

Data Sheet

BTL Drive Single-phase Full-wave Fan Motor Driver AM4953

Functional Block Diagram

Figure 3. Functional Block Diagram of AM4953

Apr. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

3

Data Sheet

BTL Drive Single-phase Full-wave Fan Motor Driver AM4953

Ordering Information

AM4953 -

Circuit Type

Package

MSOP-10

SSOP-10 FG & RD

MSOP-8 RD

SOIC-8

PSOP-8 FG

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.

Output Signal:
Blank: FG&RD/RD
F: FG

Package:
MM: MSOP-10
GS : SSOP-10
M8: MSOP-8
M: SOIC-8
MP: PSOP-8

Temperature

Range

FG & RD

-40 to 105ºC

Output

Signal

RD

FG

G1: Green

TR: Tape & Reel
Blank: Tube

Part Number Marking ID

AM4953MM-G1 4953MM-G1 Tube
AM4953MMTR-G1 4953MM-G1 Tape & Reel
AM4953GS-G1 4953GS-G1 Tube
AM4953GSTR-G1 4953GS-G1 Tape & Reel
AM4953M8-G1 4953M8-G1 Tube
AM4953M8TR-G1 4953M8-G1 Tape & Reel
AM4953M-G1 4953M-G1 Tube
AM4953MTR-G1 4953M-G1 Tape & Reel
AM4953FM-G1 4953FM-G1 Tube
AM4953FMTR-G1 4953FM-G1 Tape & Reel
AM4953FMP-G1 4953FMP-G1 Tube
AM4953FMPTR-G1 4953FMP-G1 Tape & Reel

Packing

Type

Apr. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

4

Data Sheet

BTL Drive Single-phase Full-wave Fan Motor Driver AM4953

Absolute Maximum Ratings (Note 1, TA=25ºC)

Parameter Symbol

Supply Voltage VCC 20 V
Peak Output Current I
FG/RD Pull-up Voltage VFG/VRD 15 V
FG/RD Output Current IFG/IRD 10 mA

Thermal Resistance
(Junction to Ambient)

Thermal Resistance
(Junction to Case)

Power Dissipation PD

Operating T em perature TOP -40 to 125 ºC
Storage Temperature T
ESD (Human Body Model) ESD 4000 V
ESD (Machine Model) ESD 200 V

800 mA

OUT

MSOP-10 195

MSOP-8 205

θ

JA

θ

JC

-55 to 150 ºC

STG

SSOP-10 155

SOIC-8 160
PSOP-8 110

MSOP-10 46

MSOP-8 48

SSOP-10 39

SOIC-8 40
PSOP-8 36

MSOP-10

MSOP-8

SSOP-10 800

SOIC-8 780
PSOP-8 960

Note 1: Stresses greater than those listed under “Absolute Maximu m Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.

Value

Unit

°C/W

°C/W

585

mW

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Supply Voltage VCC 2.2 16 V
Hall Input Voltage V
Operating Ambient Temperature TA -40 105 ºC

Apr. 2012 Rev. 1. 5 BCD Semiconductor Manufacturing Limited

0 VCC-1.5 V

ICM

5