Diodes AM9800 User Manual
Three Phase Direct PWM Sensorless Motor Driver AM9800
Data Sheet
General Description
The AM9800 is a direct PWM driver IC designed for
three-phase brushless motors. Also, by using highly
silent PWM drive, switching current of the phase
with a smooth slope reduces the sound of slewing
motor, and makes high-efficiency drive a reality by a
synchronous commutation.
The device is build-in lock protection. When the fan
is locked, the device will enter the lockup protection
mode. It is also equipped with thermal shutdown
function and forward or reverse rotation selection. In
normal operation, supply current is less than 2mA,
but in PWM=0 mode it is just around 20µA.
The AM9800 is available in SSOP-16 package.
Features
• Speed Controllable by PWM Input Signal
• Sensorless Drive
• Soft Switched Drive
• Build-in Forward/Reverse Switching Circuit
• Power Saving Function in a Stopped State: 2mA
and PWM=0 State: 20µA
• Build-in Current Limiter Circuit
• Build-in Lock Protection and Auto-restart
• Built-in Over Current Protection
• Built-in Thermal Shutdown Circuit
• ESD Rating: 4000V (Human Body Model)
300V (Machine Model)
Applications
• CPU Cooler Fan in Notebook Personal
Computers
Figure 1. Package Type of AM9800
SSOP-16
Sep. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
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Data Sheet
Three Phase Direct PWM Sensorless Motor Driver AM9800
Pin Configuration
GS Package
(SSOP-16)
1
16
2
3
4
5
6
7
8
Figure 2. Pin Configuration of AM9800 (Top View)
15
14
13
12
11
10
9
Pin Description
Pin Number Pin Name Function
1 VO Output pin (V), connected to the motor coil
2 UO Output pin (U), connected to the motor coil
3 VCC Supply voltage
4 COM Motor middle-point connection
5 COMIN Motor position detection comparator filter pin 1
6 FIL Motor position detection comparator filter pin 2
7 OSC OSC startup frequency setting
8 SGND Ground for IC
9 F/R Rotation direction switching
10 FG FG pulse output
11 PWM PWM signal input
12 VG Charge pump step-up output
13 CP Charge pump step-up pulse output pin
14 CPC Charge pump step-up pin
15 RF Output current detection
16 WO Output pin (W), connected to the motor coil
Sep. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
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Data Sheet
Three Phase Direct PWM Sensorless Motor Driver AM9800
Functional Block Diagram
Figure 3. Functional Block Diagram of AM9800
Sep. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
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Data Sheet
Three Phase Direct PWM Sensorless Motor Driver AM9800
Ordering Information
AM9800 -
Circuit Type
Package
GS: SSOP-16
Package Temperature Range Part Number Marking ID Packing Type
G1: Green
TR: Tape & Reel
Blank: Tube
SSOP-16
-30 to 95°C
AM9800GS-G1 AM9800GS-G1 Tube
AM9800GSTR-G1 AM9800GS-G1 Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS
compliant and green.
Absolute Maximum Ratings (TA=25°C, Note 1)
Parameter Symbol Value Unit
Supply Voltage VCC 6.5 V
Pre-drive Voltage (Gate Voltage) VG 10 V
Output Current I
PWM Input Withstand Voltage V
FG Output Withstand Voltage VFG 6 V
FG Output Current IFG 5 mA
Power Dissipation1 (Independent IC) PD1 0.3 W
Power Dissipation2 (Note 2) PD2 0.8 W
Ambient Temperature (Note 3) TA -40 to 105
0.7 A
OUT
V
PWM
V
CC
°C
Storage Temperature T
ESD (Human Body Model) 4000 V
ESD (Machine Model) 300 V
-55 to 150
STG
°C
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.
Note 2: When mounted on 76.1mm×114.3mm×1.6mm glass epoxy board.
Note 3: T
=150°C. Use the IC in the range where the temperature of the chip does not exceed TJ=150°C during
J
operation.
Sep. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
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