A8904SLPT Allegro Micro Systems, Inc., A8904SLPT Datasheet
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A8904SLPT
Manufacturer Part Number
A8904SLPT
Description
SSOP28
Manufacturer
Allegro Micro Systems, Inc.
Datasheet
1.A8904SLBT.pdf
(18 pages)
Specifications of A8904SLPT
Date_code
05+
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
A8904SLPT
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
Company:
Part Number:
A8904SLPTR-T
Manufacturer:
Allegro
Quantity:
482
Load Supply Voltage, V
Output Current
Peak Output Current (Brake)
Period
Logic Supply Voltage, V
Logic Input Voltage Range, V
Package Power Dissipation, P
Operating Temperature, T
Junction Temperature
Storage Temperature,T
1
determined by system concerns and factors. These
include: system duty cycle and timing, ambient
temperature, and use of any heatsinking and/or forced
cooling. For reliable operation, the specified maximum
junction temperature should not be exceeded.
2
occurs during braking when the motor acts as a
generator. The 3 A level is based on the maximum
peak of a sine wave that is damped. The maximum
period between the initial brake being applied and the
current through the drivers falling to 1.4 A should not
exceed 800 ms. See Braking section for more
information.
3
temperature will activate device thermal shutdown
circuitry. These conditions can be tolerated, but should
be avoided.
Output current rating may be restricted to a value
Peak output current is a transient condition that
Fault conditions that produce excessive junction
±3.0 A to ±1.4 A . . . . . . . . . . . . . . . 800 ms
(continuous) . . . . . .
(t
w
2
Absolute Maximum Ratings
<30 ns) . . . . . . .
for I
OUT(BRK)
A8904SLB
1
, I
OUT . . . . . . . . . . . . . . . . . . . . .
CONTROLLER/DRIVER WITH BACK-EMF SENSING
to fall from
3
, T
S
BB
DD
. . . . -55°C to +150°C
J
A
. . . . . . . . . . . .
-0.3 V to V
-1.0 V to V
. . . . . . . . . . . 7.0 V
. . . -20°C to +85°C
. . . . . . . . . +150°C
2
(SOIC)
, I
IN
OUT(BRK)
D
. . See Graph
DD
DD
. ±3.0 A
+ 0.3 V
+ 1.0 V
±1.4 A
15 V
*
are in production but have been determined to be LAST TIME BUY. This classification
indicates that sale of this device is currently restricted to existing customer applications.
The variants should not be purchased for new design applications because obsolescence
in the near future is probable. Samples are no longer available. Status change: October
31, 2006. Deadline for receipt fo LAST TIME BUY orders: April 27, 2007. These variants
include: A8904SLB, A8904SLBTR, A8904SLP, and A8904SLPTR.
8904
controller/drivers designed for applications where accurate control of high-
speed motors is required. The three half-bridge outputs are low on-resistance
n-channel DMOS devices capable of driving up to 1.2 A. The A8904 provides
complete, reliable, self-contained back-EMF sensing, motor startup and
running algorithms. A programmable digital frequency-locked loop speed
control circuit together with the linear current control circuitry provides
precise motor speed regulation.
operation, such as the speed control parameters, startup current limit, sleep
mode, direction, and diagnostic modes.
process, an advanced mixed-signal technology that combines bipolar, analog
and digital CMOS, and DMOS power devices. The A8904SLB is provided in
a 24-lead wide-body SOIC batwing package. The A8904SLP is provided in a
thin (<1.2 mm), 28-lead TSSOP package with an exposed thermal pad. Each
package type is available in a lead-free version (100% matte tin leadframe).
Features
A8904SLB-T
A8904SLBTR-T
A8904SLP-T
A8904SLPTR-T
Pb-based variants are being phased out of the product line. The variants cited in this footnote
Part Number
3-PHASE BRUSHLESS DC MOTOR
Pin-for-pin replacement for A8902CLBA
Startup commutation circuitry
Sensorless commutation circuitry
Option of external sector data tachometer signal
Option of external speed control
Oscillator operation up to 20 MHz
Programmable overcurrent limit
Transconductance gain options: 500 mA/V or 250 mA/V
Programmable watchdog timer
Directional control
Serial Port Interface
TTL-compatible inputs
System diagnostics data out ported in real time
Dynamic braking through serial port or external terminal
The A8904SLB and A8904SLP are three-phase brushless dc motor
A serial port allows the user to program various features and modes of
The A8904 is fabricated in Allegro’s BCD (Bipolar CMOS DMOS)
Pb-free*
Yes
Yes
Yes
Yes
28-pin TSSOP
28-pin TSSOP
24-pin SOIC
24-pin SOIC
Package
4000 per reel
450 per reel
31 per tube
50 per tube
Packing