bipolar stepper motor or bidirectionally control two dc motors. Both
modulation (PWM) control of the output current to 1.5 A.
鈮?/div>
+150
擄
C
Motor Supply Voltage, V
BB
...................
50 V
Output Current, I
OUT
.........................
鹵
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
E
..................
1.0 V
Package Power Dissipation,
P
D
........................................
See Graph
Operating Temperature Range,
T
A
.................................
-20
擄
C to +85
擄
C
Storage Temperature Range,
T
S
...............................
-55
擄
C to +150
擄
C
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擄C.
Y
L
O
N
R
O
P
E
D
C
E
N
U
E
N
R
I
E
T
F
N
E
O
R
C
R
S
O
I
F
D
鈥?/div>
2
V
BB
For PWM current control, the maximum output current is determined
by the user鈥檚 selection of a reference voltage and sensing resistor. Two
logic-level inputs select output current limits of 0, 33%, 67%, or 100%
of the maximum level. A PHASE input to each bridge determines load
current direction. Active-low ENABLE inputs control the four drivers in
each bridge.
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 A2927SEB is supplied in a 44-lead power PLCC for surface-
mount applications. Its batwing construction provides for maximum
package power dissipation in the smallest possible construction.
30
PWM 2
U
D
T
C
29
GND
胃
2
26
27
EN
2
19
LOAD SUPPLY
22
OUT
2B
21
OUT
2A
18
SENSE
2
20
V
REF 2
25
I
20
23
I
21
24
PHASE
2
2
ENABLE
RC
2
E
2
28
Dwg. PP-021
FEATURES
s
1.5 A Output Current
s
50 V Output Sustaining Voltage
s
Internal Flyback Diodes
s
Undervoltage Lockout
s
Digital Control of Output Current
s
Internal Thermal Shutdown Circuitry
Always order by complete part number:
A2927SEB
.
1
2
3
4
5
6
7
8
