Preliminary Specification
aMC8510
SINGLE PHASE VARIABLE SPEED
FAN MOTOR CONTROLLER
Product Description
The aMC8510 is a full featured monolithic brushless DC
motor controller containing all the required driver functions to
implement fan speed control. This device features
a
selectable slope pulse width modulator (PWM) for efficient
speed control that is compatible with analog and digital
control signals, programmable minimum speed setting,
selectable automatic fan power down mode for power
sensitive applications, latching PWM for enhanced noise
immunity, integrated fault timer with auto start retry, adaptive
motor kick start timer to insure start up, combined frequency
generator / rotor lock output, Hall amplifier with propriety
noise immunity circuitry for proper drive sequencing,
compatibility with differential non-buffered and buffered
sensors, op amp and pinned out reference for thermal sensor
voltage scaling, fixed non-overlapping commutation delay for
reduced power supply current spiking, two 40 V open drain
top drive outputs, two 100 mA complementary bottom drive
outputs that are ideally suited for driving power MOSFETs,
programmable cycle-by-cycle current limiting, under voltage
lockout and thermal shutdown protection, and an internal
shunt regulator for use with higher voltage motors.
Pin Configuration
Phase 1
Bottom Drive
Phase 2
Bottom Drive
1
2
3
4
5
6
7
8
16
15
14
13
Features
• Analog and digital speed control signal compatibility
• Selectable PWM speed control slope
Phase 2
Top Drive
Phase 1
Top Drive
Reference
Output
• Programmable minimum speed setting
• Selectable automatic fan power down mode
• Latching PWM for enhanced noise immunity
• Integrated fault timer with auto start retry
• Adaptive motor kick start timer
• Combined frequency generator / rotor lock output
• Hall amplifier with propriety noise immunity circuitry
• Differential unbuffered and digital Hall compatibility
• Op amp and pinned out reference
• Two 40 V open drain top drive outputs
• Two 100 mA complementary bottom drive outputs
• Programmable cycle-by-cycle current limit protection
• Under voltage lockout
VDD
Current Sense
Input
Hall -
aMC8510
Hall +
Ground
12
11
10
9
Minimum
Speed Set
Freq Gen.
Rotor Lock
Non-Inverting
Input
Slope Select
Op Amp Output/
Speed Control
Input
Inverting
Input
• Thermal shutdown protection
• Internal shunt regulator for higher voltage motors
• MSL-1 per JEDEC J-STD-020C
Applications
•
•
•
PC, workstation and mainframe fans
Telcom, LAN server fans and blowers
Industrial control, card racks and instrumentation
• Pb-free Matte Sn lead finish & RoHS Compliant Packages
•
Ordering Information
Part Number
aMC8510D16
aMC8510QS16
Package
Junction Temperature Range
Marking
SOIC 16 Lead
aMC8510
Ayww
-40°C to 150°C
QSOP 16 Lead
Ayww – Assembly site, year, workweek
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© Andigilog, Inc. 2007
February 2007 - 70A06002