Diodes AM4961A User Manual
AM4961A
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AM4961A
Direct Current (BLDC) full wave motor driver with PWM control
For system flexibility the motor speed can be controlled by either an
external PWM signal or by a DC voltage or from a Thermistor
Based on the input signal, the AM4961A adjust the output
To help protect the motor coil, the AM4961A provides a rotor lock
protection which shuts down the output if rotor lock is detected. The
and speed, AM4961A provides open drain Rotor lock detect alarm
t Frequency Generator (FG).
2
3
4
5
6
7
8
15
14
13
12
11
10
9
16
1
OUT2
NC
VCC
VMIN
VPWM
COSC
FG
RD
HIN+
HB
HIN-
VREF
CT
GND
OUT1
PGND
1
2
3
4
5
6
7
14
13
12
11
9
8
10
PGND PGND
OUT2
VCC
VMIN
VPWM
COSC
FG
RD HIN+
HB
HIN-
VREF
CT
GND
OUT1
Description
The AM4961A is highly integrated feature rich single phase Brushless
function for fans, blowers and extractors.
network.
duty cycle.
device automatically re-starts when the rotor lock is removed.
To help interface to external system for monitoring the m otor statu s
NEW PRODUCT
output (RD) pin and a tachometer outpu
The FG output is the magnetic change frequency.
The AM4961A is available in SSOP-16 and HTSSOP-14 packages
Features
SINGLE PHASE FULL WAVE PWM MOTOR DRIVER
Pin Assignments
.
A Product Line of
Diodes Incorporated
(Top View)
SSOP-16 (GS Package)
(Top View)
• Operating voltage : 3.5V to 16V
• Internal H-Bridge with 1A Peak Current Capability
• Speed Control with external PWM, DC or Thermistor signals
• Minimal Speed Setting
• Built-in Hall Bias Circuit
• Reference Voltage Output
• Rotor Lock Protection with Output Shutdown and Auto Restart
• Rotation Speed Indication (FG)
• Rotation or Lock State Indication (RD)
• Built-in Thermal Shutdown Circuit
• Industry standard SSOP-16 and Thermally Enhanced
HTSSOP-14 Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Document number: DS36626 Rev. 1 - 2
Applications
• 12V BLDC Cooling Fans, Motors, Extractors and Blowers
• CPU Cooler Fan in PC
• Instrumentation and Equipment Cooling fans
• Brushless DC Motor Driver
www.diodes.com
HTSSOP-14 (GH Package)
October 2013
© Diodes Incorporated
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