DataSheet39.com

What is A8904SLB-T?

This electronic component, produced by the manufacturer "Allegro MicroSystems", performs the same function as "3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING".


A8904SLB-T Datasheet PDF - Allegro MicroSystems

Part Number A8904SLB-T
Description 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING
Manufacturers Allegro MicroSystems 
Logo Allegro MicroSystems Logo 


There is a preview and A8904SLB-T download ( pdf file ) link at the bottom of this page.





Total 18 Pages



Preview 1 page

No Preview Available ! A8904SLB-T datasheet, circuit

8904
3-PHASE BRUSHLESS DC MOTOR
CONTROLLER/DRIVER WITH BACK-EMF SENSING
A8904SLB (SOIC)
Absolute Maximum Ratings
The A8904SLB and A8904SLP are three-phase brushless dc motor
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.
A serial port allows the user to program various features and modes of
operation, such as the speed control parameters, startup current limit, sleep
mode, direction, and diagnostic modes.
The A8904 is fabricated in Allegro’s BCD (Bipolar CMOS DMOS)
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 SSOP package with an exposed thermal pad. Each
package type is available in a lead-free version (100% matte tin leadframe).
Load Supply Voltage, VBB . . . . . . . . . . . . 15 V
Output Current1, IOUT . . . . . . . . . . . . . . . . . . . . . ±1.4 A
Peak Output Current (Brake)2, IOUT(BRK) . ±3.0 A
Period2 for IOUT(BRK) to fall from
±3.0 A to ±1.4 A . . . . . . . . . . . . . . . 800 ms
Logic Supply Voltage, VDD . . . . . . . . . . . 7.0 V
Logic Input Voltage Range, VIN
(continuous) . . . . . . -0.3 V to VDD + 0.3 V
(tw <30 ns) . . . . . . . -1.0 V to VDD + 1.0 V
Package Power Dissipation, PD . . See Graph
Operating Temperature, TA . . . -20°C to +85°C
Junction Temperature3, TJ . . . . . . . . . +150°C
Storage Temperature,TS . . . . -55°C to +150°C
1Output current rating may be restricted to a value
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.
2Peak output current is a transient condition that
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.
3Fault conditions that produce excessive junction
temperature will activate device thermal shutdown
circuitry. These conditions can be tolerated, but should
be avoided.
Features
„ 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
Always order by complete part number:
Part Number Package
A8904SLB
24-pin batwing SOIC
A8904SLB-T 24-pin batwing SOIC; Lead-free
A8904SLP
28-pin SSOP with Exposed Thermal Pad
A8904SLP-T 24-pin SSOP with Exposed Thermal Pad; Lead-free

line_dark_gray
A8904SLB-T equivalent
8904
3-PHASE BRUSHLESS DC
MOTOR CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS continued
Characteristic
CWD Current
Symbol
ICWD
CWD Threshold Voltage
Max. FLL Oscillator Frequency
Oscillator High Duration
Oscillator Low Duration
Maximum Output Current
VTL
VTH
fOSC
ton
toff
IOUT(MAX)
Transconductance Gain
Centertap Resistors
Back-EMF Threshold with respect
to VCTAP at FCOM transition
gm
RCT
Test Conditions
Charging, D26 = 0, D27 = 0
Charging, D26 = 0, D27 =1
Charging, D26 = 1 D27 = 0
Charging, D26 = 1, D27 =1
D3 = 0, D4 = 0, D28 = 0
D3 = 0, D4 = 1, D28 = 0
D3 = 1, D4 = 0, D28 = 0
D3 = 1, D4 = 1, D28 = 0
D3 = 0, D4 = 0, D28 = 1
D3 = 0, D4 = 1, D28 = 1
D3 = 1, D4 = 0, D28 = 1
D3 = 1, D4 = 1, D28 = 1
D28 = 1
D28 = 0
Min.
-9.0
-18
-27
-36
0.22
2.25
20*
20
20
1.0
0.9
500
500
415
210
420
5.0
5.0
-5.0
Limits
Typ. Max.
-10 -11
-20 -22
-30 -33
-40 -44
0.25 0.28
2.5 2.75
——
——
——
1.2 1.4
1.0 1.1
600 700
250 —
600 700
500 585
300 —
125 —
250 290
500 580
10 13
20 37
-20 -37
Negative current is defined as coming out of (sourcing) the specified device terminal.
* Operation at an oscillator frequency greater than the specified minimum value is possible but not waranteed.
Units
µA
µA
µA
µA
V
V
MHz
ns
ns
A
A
mA
mA
mA
mA
mA
mA
mA/V
mA/V
k
mV
mV
www.allegromicro.com
5


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for A8904SLB-T electronic component.


Information Total 18 Pages
Link URL [ Copy URL to Clipboard ]
Download [ A8904SLB-T.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
A8904SLB-TThe function is 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING. Allegro MicroSystemsAllegro MicroSystems

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

A890     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search