參數(shù)資料
型號(hào)： A8904
廠商： Allegro MicroSystems, Inc.
英文描述： 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING
中文描述： 3相無刷直流電動(dòng)機(jī)控制器/驅(qū)動(dòng)器，反電動(dòng)勢(shì)遙感
文件頁(yè)數(shù)： 1/18頁(yè)
文件大?。?/td> 1160K
代理商： A8904
Absolute Maximum Ratings
Load Supply Voltage, V
BB
. . . . . . . . . . . .
15 V
Output Current
1
, I
OUT. . . . . . . . . . . . . . . . . . . . .
±1.4 A
Peak
Output
Current
(Brake)
2
,
I
OUT(BRK)
.
±3.0 A
Period
2
for I
OUT(BRK)
to fall from
±3.0 A to ±1.4 A . . . . . . . . . . . . . . .
800 ms
Logic Supply Voltage, V
DD
. . . . . . . . . . .
7.0 V
Logic Input Voltage Range, V
IN
(continuous) . . . . . .
-0.3 V to V
DD
+ 0.3 V
(t
w
<30 ns) . . . . . . .
-1.0 V to V
DD
+ 1.0 V
Package Power Dissipation, P
D
. .
See Graph
Operating Temperature, T
A
. . .
-20°C to +85°C
Junction Temperature
3
, T
J
. . . . . . . . .
+150°C
Storage Temperature,T
S
. . . .
-55°C to +150°C
1
Output 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.
2
Peak 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.
3
Fault conditions that produce excessive junction
temperature will activate device thermal shutdown
circuitry. These conditions can be tolerated, but should
be avoided.
D
2
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).
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
3-PHASE BRUSHLESS DC MOTOR
CONTROLLER/DRIVER WITH BACK-EMF SENSING
8904
A8904SLB
(SOIC)
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
相關(guān)PDF資料
PDF描述
A8905CLB 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING
A8906CLB BIDIRECTIONAL 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING
A8909CLB 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING AND POWER DMOS OUTPUTS
A8920 Dual Schottky Barrier Diodes(用于硬盤驅(qū)動(dòng)器的20V反向電壓雙肖特基勢(shì)壘二極管)
A8920SLR DUAL SCHOTTKY DIODE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A8904SLB 功能描述:IC CTRLR/DRIVER DC MOTOR 24SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR
A8904SLB-T 功能描述:IC CTRLR/DRIVER DC MOTOR 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR
A8904SLB-T 制造商:Allegro MicroSystems 功能描述:Driver IC Leaded Process Compatible:Yes
A8904SLBTR 功能描述:IC CTRLR/DRIVER DC MOTOR 24SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR
A8904SLBTR-T 功能描述:IC CTRLR/DRIVER DC MOTOR 24SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:直流電機(jī)驅(qū)動(dòng)器，步進(jìn)電機(jī)驅(qū)動(dòng)器 評(píng)估套件:- 輸出數(shù):1 或 2 電流 - 輸出:750mA 電壓 - 負(fù)載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR
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