- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371437 > 2936-120 (Allegro MicroSystems, Inc.) 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER PDF資料下載
參數(shù)資料
| 型號： | 2936-120 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER |
| 中文描述： | 3相無刷直流電動機控制器/驅(qū)動器 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 211K |
| 代理商： | 2936-120 |
2936
-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
The UDN2936W-120 power driver provides commutation
logic and power outputs to drive three-phase brushless dc
motors.
The UDN2936W-120 is designed to interface with single-
ended linear or digital Hall-effect devices (HEDs). Internal
pull-up resistors allow for direct use with open-collector digital
HEDs. The H
n
inputs have 2.5 V thresholds.
The commutation logic provides decoding for HEDs with
120
°
electrical separation. At any one step in the logic sequenc-
ing, one half-bridge driver is sourcing current, one driver is
sinking current, and one driver is in a high-impedance state (see
Truth Table).
A logic low on the BRAKE pin turns on the three sink
drivers and turns off the three source drivers, essentially
shorting the motor windings to ground. During braking, the
back-electromotive force generated by the motor produces a
current that dynamically brakes the motor. Depending upon the
rotational velocity of the motor, this current can approach the
locked rotor current level (which is limited only by the motor
winding resistance). During braking, the output current-
limiting circuitry is disabled and care should be taken to ensure
that the back-EMF generated brake current does not exceed the
maximum rating (3 A peak) of the sink drivers and ground
clamp diodes.
Changing the logic level of the DIRECTION pin inverts the
output states, thus reversing the direction of the motor. Chang-
ing the direction of a rotating motor produces a back-EMF
current similar to when braking the motor. The load current
should not be allowed to exceed the maximum rating (
±
3 A
peak) of the drivers.
An internally generated dead time (t
d
) of approximately
2
μ
s prevents potentially destructive crossover currents that can
occur when changing direction or braking.
Motor current is internally controlled by pulse-width
modulating the source drivers with a preset hysteresis format.
Load current through an external sense resistor (R
S
) is con-
stantly monitored. When the current reaches the set trip point
(determined by an external reference voltage or internal
default), the source driver is disabled. Current recirculates
through the ground clamp diode, motor winding, and sink
driver. An internal constant-current sink reduces the trip point
(hysteresis). When the decaying current reaches this lower
threshold, the source driver is enabled again and the cycle
repeats.
APPLICATIONS INFORMATION
Thresholds and hysteresis can be set with external resistors,
or internal defaults can be used. With V
THS
> 3.0 V, the trip
point is internally set at 300 mV with 7.5% hysteresis. Load
current is then determined by the equation:
I
TRIP
= 0.3/R
S
With V
THS
< 3.0 V, the threshold, hysteresis percentage,
and peak current are set with external resistors according to the
equations:
threshold voltage (V
THS
) = V
REF
x R
T
/(R
H
+ R
T
)
hysteresis percentage = R
H
/50 V
REF
load trip current (I
TRIP
) = V
THS
/10 R
S
Percentage hysteresis is a fixed value independent of load
current. The chopping frequency is a function of circuit
parameters including load inductance, load resistance, supply
voltage, hysteresis, and switching speed of the drivers.
The UDN2936W-120 outputs are rated for normal operat-
ing currents of up to
±
2 A and startup currents to
±
3 A (see
cautions above regarding braking and changing of motor
direction). Internal power ground-clamp and flyback diodes
protect the outputs from the voltage transients that occur when
switching inductive loads. All devices also feature thermal
protection circuitry. If the junction temperature reaches
+165
°
C, the thermal shutdown circuitry turns off all output
drivers. The outputs are re-enabled when the junction cools
down to approximately +140
°
C. This protection is only
intended to protect the device from failures due to excessive
junction temperature or loss of heat sinking and should not
imply that output short circuits are permitted.
As with all high-power integrated circuits, the printed
wiring board should utilize a heavy ground plane. For optimum
performance, the drivers should be soldered directly into the
board. The power supply should be decoupled with an electro-
lytic capacitor (>10
μ
F) as close as possible to the device
supply pin (V
BB
).
Replacing the UDN2936W.
The original UDN2936W can
be easily replaced with a UDN2936W-120 by inserting an
inverter (two resistors and a 2N3904 or 2N2222) between the
H
2
Hall sensor and pin 8 of the UDN2936W-120, as shown in
the figure on the next page. If an extra inverter is available, be
certain that a pull-up for the Hall sensor is provided.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 2938.803.0018.0-000 | MOTOR DC GETRIEBE 18 1 |
| 2938.803.0030.0-000 | 5-Pin, Multiple-Input, Programmable Reset ICs |
| 2938.804.0060.0-000 | MOTOR DC GETRIEBE 60 1 |
| 2938.804.0100.1-000 | 5-Pin, Multiple-Input, Programmable Reset ICs |
| 2938.805.0200.0-000 | MOTOR DC GETRIEBE 200 1 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 2936-120_02 | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER |
| 293615-1 | 功能描述:SSL Connector 5 Position Plug Housing for Socket Contact Cable/Wire to Cable/Wire or Board Crimp 制造商:te connectivity amp connectors 系列:Nector M 包裝:散裝 零件狀態(tài):有效 樣式:電纜轉(zhuǎn)電纜或板卡 連接器類型:用于插座觸頭的插頭外殼 針腳數(shù):5 安裝類型:自由懸掛 端接:壓接 間距:- 緊固類型:- 特性:帶標記 外殼顏色:自然色 線規(guī):- 觸頭材料:- 觸頭鍍層:- 外殼材料:聚酰胺（PA），尼龍，玻璃纖維增強型 工作溫度:-40°C ~ 85°C 額定電壓:400V 額定電流:20A 侵入防護:IP20 配接次數(shù):- 標準包裝:125 |
| 293615-2 | 功能描述:SKT HSG FREE HANGING M-LINE 5 PO 制造商:te connectivity amp connectors 系列:Nector M 包裝:散裝 零件狀態(tài):在售 樣式:電纜轉(zhuǎn)電纜或板卡 連接器類型:用于插座觸頭的插頭外殼 針腳數(shù):5 安裝類型:自由懸掛 端接:壓接 間距:- 緊固類型:- 特性:帶標記 外殼顏色:天然 線規(guī):- 觸頭材料:- 觸頭鍍層:- 外殼材料:聚酰胺（PA），尼龍，玻璃纖維增強型 工作溫度:-40°C ~ 85°C 額定電壓:400V 額定電流:20A 侵入防護:IP20 配接次數(shù):- 標準包裝:500 |
| 293615-3 | 功能描述:SSL Connector 5 Position Plug Housing for Socket Contact Cable/Wire to Cable/Wire or Board Crimp 制造商:te connectivity amp connectors 系列:Nector M 包裝:散裝 零件狀態(tài):有效 樣式:電纜轉(zhuǎn)電纜或板卡 連接器類型:用于插座觸頭的插頭外殼 針腳數(shù):5 安裝類型:自由懸掛 端接:壓接 間距:- 緊固類型:- 特性:帶標記 外殼顏色:自然色 線規(guī):- 觸頭材料:- 觸頭鍍層:- 外殼材料:聚酰胺（PA），尼龍，玻璃纖維增強型 工作溫度:-40°C ~ 85°C 額定電壓:400V 額定電流:20A 侵入防護:IP20 配接次數(shù):- 標準包裝:125 |
| 293615-4 | 功能描述:SKT HSG FREE HANGING M-LINE 5 PO 制造商:te connectivity amp connectors 系列:Nector M 包裝:散裝 零件狀態(tài):在售 樣式:電纜轉(zhuǎn)電纜或板卡 連接器類型:用于插座觸頭的插頭外殼 針腳數(shù):5 安裝類型:自由懸掛 端接:壓接 間距:- 緊固類型:- 特性:帶標記 外殼顏色:天然 線規(guī):- 觸頭材料:- 觸頭鍍層:- 外殼材料:聚酰胺（PA），尼龍，玻璃纖維增強型 工作溫度:-40°C ~ 85°C 額定電壓:400V 額定電流:20A 侵入防護:IP20 配接次數(shù):- 標準包裝:500 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。