Diodes AM9789 User Manual

Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789

Data Sheet

General Description

The AM9789 is a single-phase, full wave motor driver suited for DC fan motor, and its speed is controlled by PWM input signal. It is suitable for both game machine and CPU cooler which need silent drivers. It features lock protection, thermal shutdown, PWM control, low noise and so on.

The AM9789 is available in MSOP-8, MSOP-10 DFN-3×3-8 and DFN-3×3-10 packages.

Features

• BTL Output Single-phase Full-wave Linear Driver

• Silent Driver

• Low Supply Current (Normal Operation，Less than 4mA)

• Low Standby Current (PWM=0 Duty) @

Supply Current Less than 200µA

• Speed Controllable by PWM Input Signal

• Built-in Quick Start Function

• Built-in Lock Protection and Auto Restart

Function

• Built-in Hall Bias Circuit

• Built-in FG Output

• Built-in Thermal Shutdown Circuit

• Built-in Over Current Protection Circuit

Applications

• Silent Fan Motors

MSOP-8 MSOP-10 DFN-3×3-8 DFN-3×3-10

Figure 1. Package Types of AM9789

Oct. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789

Pin Configuration

M8 Package MM Package

(MSOP-8) (MSOP-10)

1

2

3

4

DN8 Package DN Package (DFN-3×3-8) (DFN-3×3-10)

Pin 1 Mark

1

2

3

45

Pin Description

8

7

6

5

8

7

6

1

2

3

4

5

Pin 1 Mark

1

2

3

4

56

Figure 2. Pin Configuration of AM9789 (Top View)

10

9

8

7

6

10

9

8

7

Pin Number

MSOP-10/

DFN-3×3-10

MSOP-8/

DFN-3×3-8

Pin Name Function

1 1 OUT2 Output Connection 2 2 NC No connected 3 3 HIN+ Hall input(+). Connect to Hall element positive output 4 HB Hall bias 5 4 HIN- Hall input(-). Connect to Hall element negative output 6 5 FG Rotation speed output 7 6 PWM PWM signal input terminal 8 2 VCC Power supply 9 7 OUT1 Output Connection 1

10 8 GND Ground

Oct. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789

Functional Block Diagram

Figure 3. Functional Block Diagram of AM9789

Oct. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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Data Sheet

Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789

Ordering Information

AM9789 -

Circuit Type

Package M8: MSOP-8 MM: MSOP-10 DN8: DFN-3×3-8 DN: DFN-3×3-10

Package Temperature Range Part Number Marking ID Packing Type

G1: Green

TR: T ape & Reel

MSOP-10

MSOP-8 AM9789M8TR-G1 9789M8-G1 Tape & Reel

-40 to 105°C

DFN-3×3-8 AM9789DN8TR-G1 B6E Tape & Reel

DFN-3×3-10 AM9789DNTR-G1 BFD Tape & Reel

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

AM9789MMTR-G1 9789MM-G1 Tape & Reel

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Data Sheet

Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789

Absolute Maximum Ratings (TA=25°C, Note 1)

Parameter Symbol Value Unit

Supply Voltage VCC 10 V Output Current I Output Voltage V HB Output Current IHB 10 mA FG Output Voltage VFG 10 V FG Output Sink Current IFG 10 mA Operation T emperat ure TOP -40 to 125 Storage Temperature Range T Lead T em perature (Soldering 10s) T

Thermal Resistance (Junction to Ambient)

Thermal Resistance (Junction to Case)

Power Dissipation P

ESD (Human Body Model) ESD (Machine Model)

1 A

OUT

10 V

OUT

°C

-55 to 150

STG

260

LEAD

MSOP-8 205

θ

JA

θ

JC

D

MSOP-10 195

DFN-3x3-8 71

DFN-3x3-10 71

MSOP-8 48

MSOP-10 46

DFN-3x3-8 48

DFN-3x3-10 48

MSOP-8 585

MSOP-10 585

DFN-3x3-8 1760

DFN-3x3-10 1760

4000

400

°C °C

°C/W

mW

V V

Note 1: Stresses greater than those listed under “Absolute Maximum 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.

Recommended Operating Conditions (TA=25°C)

Parameter Symbol Min Max Unit

Supply Voltage VCC 2 6 V Hall Input Voltage Range VHB 0.4 VCC -1.1 V Operating Ambient Temperature TA -40 105

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°C

Data Sheet

Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789

Electrical Characteristics

V

=5V, TA=25°C, unless otherwise specified.

CC

Parameter Symbol Conditions Min Typ Max Unit

Operation Current I Standby Current I

Rotation Mode 2 4 mA

CC1

V

CC2

=0 130 200

PWM

µA HB Pin Output Voltage VHB IHB=5mA 1.1 1.3 1.5 V Lock Detection ON Time tON 0.3 0.4 0.5 s Lock Detection OFF Time t

3 4 5 s

OFF

Quick Start Enable Time tQS 55 75 ms Output Drivers Saturation

Voltage

V

SAT(H+L)

Input-Output Gain GIO V

I

=250mA, upper

OUT

and lower total

/(V

OUT

HIN+-VHIN-

0.5 0.7 V

) 44 47 50 dB FG Pin Low Voltage VFG IFG=5mA 0.2 0.3 V FG Pin Leakage Current I

PWM Input High Level Voltage PWM Input Low Level Voltage

PWM Input Frequency f Hall Input Offset Voltage V

Hall Input Hysteresis Voltage Thermal Protection Temperature

Thermal Hysteresis Width

VFG=5V 0.1 1

FGL

V

PWMH

V

PWML

PWM

V

T

△T

HOFS

HYS

SD

0.5×V

CC

V

CC

0 0.2×VCC V

0.02 50 kHz ±10 mV

±5 ±10 ±15 mV

165 30

µA

°C °C

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