- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371437 > 2962 (Allegro MicroSystems, Inc.) DUAL SOLENOID/MOTOR DRIVER .PULSE-WIDTH MODULATED CURRENT CONTROL PDF資料下載
參數(shù)資料
| 型號： | 2962 |
| 廠商： | Allegro MicroSystems, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | DUAL SOLENOID/MOTOR DRIVER .PULSE-WIDTH MODULATED CURRENT CONTROL |
| 中文描述： | 雙電磁/電機(jī)驅(qū)動。脈寬調(diào)制電流控制 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 141K |
| 代理商： | 2962 |
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
CIRCUIT DESCRIPTION
AND APPLICATIONS INFORMATION
The UDN2962W high-current driver is intended for use as a
free-running, pulse-width modulated solenoid driver.
Circuit Description.
In operation, the source and sink drivers are
both turned on by a low level at the input. The load current rises with
time as a function of the load inductance, total circuit resistance, and
supply voltage and is sensed by the external sense resistor (R
S
).
When the load current reaches the trip point (I
TRIP
), the comparator
output goes high and turns off the source driver. The actual load
current will peak slightly higher than I
TRIP
because of the internal logic
and switching delays.
After the source driver is turned off, the load current continues to
circulate through the sink driver and an internal ground clamp diode.
The rate of current decay is a function of the load inductance and total
circuit resistance.
An internal constant current sink reduces the trip point (hysteresis)
until the decaying load current reaches the lower threshold, when the
comparator output goes low and the source driver is again turned on.
Load current is again allowed to rise to the trip point and the cycle
repeats.
Maximum load current and hysteresis is determined by the user.
Determining Maximum Load Current and Hysteresis.
Trip
current (I
TRIP
) is determined as a function of resistance R
S
and the
threshold voltage, V
THS
:
V
THS
I
TRIP
=
10 R
S
where V
THS
= 10 x V
SENSE
= 0.6 V to 5.0 V.
Hysteresis percentage (H) is determined by resistance R
H
and is
independent of the load current:
R
H
H =
50 x V
REF
The chopping frequency is asynchronous and a function of the
system and circuit parameters, including load inductance, supply
voltage, hysteresis setting, and switching speed of the driver.
Resistance R
T
is determined as:
R
H
V
THS
V
REF
– V
THS
R
T
=
Note that if V
THS
= V
REF,
then R
T
=
∞
.
Circuit Layout.
To prevent interaction
between channels, each of the two high-level
power ground returns (the low side of the
sense resistors) must be returned independ-
ently to the low-level signal ground (pin 1).
The circuit common (pin 1) can then be
routed to the system ground.
The printed wiring board should utilize a
heavy ground plane. For optimum perform-
ance, the driver should be soldered directly
into the board.
The power supply (V
CC
) should be
decoupled with an electrolytic capacitor
(
≥
10
μ
F) as close as possible to pin 7.
TYPICAL WAVESHAPES
=
VIN
VSINK
VSOURCE
ILOAD
VTHS
VCC
GND
VCC
ITRIP R
GND
V
10
Dwg. WP-006
3
7
10
+
R
S
R
S
S
SUPPLY
Dwg. OP-001
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 2967086 | PLC relay, consisting of base terminal block PLCBSC |
| 296A101 | 5-Pin, Multiple-Input, Programmable Reset ICs |
| 2970015 | MODULE BASE |
| 2970028 | 5-Pin, Multiple-Input, Programmable Reset ICs |
| 2970031 | MODULE FOOT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 29-6200 | 制造商:Pro Elec 功能描述:FLASHLIGHT 1 LED TRIPOD |
| 296-20-01100 | 制造商:ELCON / TYCO ELECTR 功能描述:Cross Referenced to TE CONNECTIVITY - Part: AMP1648599-1 |
| 2962023 | 功能描述:接線端子工具和配件 UM-16 RELS/KSR-G2 4/1/N/PE/PLC RoHS:否 制造商:Phoenix Contact 產(chǎn)品:Tools & Accessories 類型:End Bracket |
| 2-962031-1 | 制造商:TE Connectivity 功能描述:25P BU-GEH 2,5MM D - Bulk |
| 2962036 | 功能描述:接線端子板接口模塊 UM-16 RELS/KSR-G2 4/1/NPE/E/PLC RoHS:否 制造商:Phoenix Contact 類型:Isolating Amplifier 節(jié)距: 位置/觸點數(shù)量:2 線規(guī)量程: 電流額定值: 電壓額定值:24 V 安裝風(fēng)格:DIN Rail 安裝角: 端接類型:Screw 觸點電鍍: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。