參數(shù)資料
型號(hào): 2918
廠商: Allegro MicroSystems, Inc.
元件分類(lèi): 基準(zhǔn)電壓源/電流源
英文描述: DUAL FULL-BRIDGE PWM MOTOR DRIVER
中文描述: 雙全橋PWM電機(jī)驅(qū)動(dòng)
文件頁(yè)數(shù): 1/8頁(yè)
文件大?。?/td> 191K
代理商: 2918
DSCONTNUEDPRODUCT
Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under
any set of conditions, do not exceed the specified
peak current rating or a junction temperature of
+150
°
C.
A2918SWH
—FORREFERENCEONLY
UseUDN2917EBfornewdesgn
A2918SWV
For Vertical Mount
The A2918SWH and A2918SWV motor drivers are designed
to drive both windings of a bipolar stepper motor or bidirectionally
control two dc motors. All bridges are capable of sustaining 45 V and
include internal pulse-width modulation (PWM) control of the output
current to 1.5 A.
determined by the user’s selection of a reference voltage and sensing
resistor. A PHASE input to each bridge determines load current
direction. Active low ENABLE inputs control the four drivers in
each bridge.
The bridges include both ground clamp and flyback diodes for
protection against inductive transients. Internally generated delays
prevent cross-over currents when switching current direction.
Special power-up sequencing is not required. Thermal protection
circuitry disables the outputs if the chip temperature exceeds safe
operating limits.
The A2918SWH/V are supplied in an 18-lead power-tab package
with staggered lead forming. The tab is internally insulated from the
device and requires no external isolation. The A2918SWH/V are
available for operation from -40
°
C to +85
°
C. To order, change the
suffix from 'S–' to 'E–'. These devices are also available on special
order for operation to +125
°
C.
FEATURES
I
±
1.5 A Continuous Output Current
I
45 V Output Sustaining Voltage
I
Internal PWM Current Control
I
Low Output Saturation Voltage
I
Internal Clamp Diodes
I
Internal Thermal Shutdown Circuitry
I
Similar to Dual PBL3718 or Dual PBL3770
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
ABSOLUTE MAXIMUM RATINGS
at T
J
+150
°
Motor Supply Voltage, V
BB
. . . . . . . . .
45 V
Output Current, I
OUT
(t
w
20
μ
s) . .
±
1.75 A
(Continuous) . . . . . . . . . . . . . .
±
1.5 A
Logic Supply Voltage, V
CC
. . . . . . . . .
7.0 V
Logic Input Voltage Range,
V
IN
. . . . . . . . . . . . . . .
-0.3 V to +7.0 V
Output Emitter Voltage, V
. . . . . . . . .
1.5 V
Package Power Dissipation,
. . . . . . . . . . . . . . . . . . . .
See Graph
Operating Temperature Range,
A
. . . . . . . . . . . . . . . .
-20
°
C to +85
°
Storage Temperature Range,
. . . . . . . . . . . . . . .
-40
°
C to +150
°
Always order by complete part number:
Part Number
Application
For Horizontal Mount
V
V
V
B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
Dwg. PP-051
OUT1A
OUT1B
OUT2A
OUT2B
E1
E2
SENSE1
SENSE2
GROUND
REFERENCE
LOGIC SPLY
LOAD SPLY
ENABLE1
ENABLE2
RC1
RC2
PHASE1
PHASE2
D
2
2918
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