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Ericsson

PBL3717-2 Datasheet Preview

PBL3717-2 Datasheet

Stepper Motor Drive Circuit

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PBLAp3ri7l 11979/72
PBL 3717/2
Stepper Motor
Drive Circuit
Description
PBL 3717/2 is a bipolar monolithic circuit intended to control and drive the current in
one winding of a stepper motor.
The circuit consists of a LS-TTL compatible logic input stage, a current sensor, a
monostable multivibrator and a high power H-bridge output stage with built-in
protection diodes.
Two PBL 3717/2 and a small number of external components form a complete
control and drive unit for LS-TTL or microprocessor-controlled stepper motor systems.
Key Features
• Half-step and full-step modes.
• Switched mode bipolar constant
current drive.
• Wide range of current control
5 - 1200 mA.
• Wide voltage range 10 - 50 V.
• Designed for unstabilized motor supply
voltage.
• Current levels can be selected in steps
or varied continuously.
• Thermal overload protection.
Phase
I1
I0
VR
VCC
Schmitt
Trigger
Time
Delay
1
1
VMM
VMM
1
&&&&
≥1
≥1
MA
MB
GND
+
+
+
Current Sensor
C
Figure 1. Block diagram.
Output Stage
Monostable
t
off
=
0.69
R•
T
CT
TE
PBL 3717/2
16-pin plastic
batwing DIP
28-pin plastic
PLCC package
PBL 3717/2
20-pin SO wide
batwing package
1
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Ericsson

PBL3717-2 Datasheet Preview

PBL3717-2 Datasheet

Stepper Motor Drive Circuit

No Preview Available !

PBL 3717/2
Maximum Ratings
Parameter
Voltage
Logic supply
Motor supply
Logic inputs
Comparator input
Reference input
Current
Motor output current
Logic inputs
Analog inputs
Temperature
Operating temperature
Storage temperature
* refers to DIP package
*
6
3, 14
7, 8, 9
10
11
1, 15
7, 8, 9
10, 11
Recommended Operating Conditions
Parameter
Logic supply voltage
Motor supply voltage
Motor output current
Junction Temp
Rise time logic inputs
Fall time logic inputs
Symbol
VCC
V
MM
V
I
VC
VR
IM
II
IA
TJ
TS
Min
0
0
-0.3
-0.3
-0.3
-1200
-10
-10
-40
-55
Max
Unit
7V
50 V
6V
VCC V
15 V
+1200
mA
mA
mA
+150
+150
°C
°C
Symbol
VCC
VMM
I
M
T
J
tr
tf
Min
4.75
10
-1000
-20
Typ
5
Max
5.25
40
+1000
+125
2
2
Unit
V
V
mA
°C
µs
µs
I CC
II IIH I IL Phase 8
I1 7
I0 9
IA V R 11
VCC
6
Schmitt
Trigger
Time
Delay
1
1
& &&&
1
VMM
14
VMM
3
1
1
I MM
MA I M I OL
15
MB
1
V
CC
VI VA
VIH
VIL
V
R
+
Output Stage
+
4, 5,
GND 12, 13
IC
IA
VC
VCH
+
Current Sensor
10
C
1 k
820 pF
CC
RC
56 k
Monostable
toff
=
0.69
R•
T
C
T
PBL 3717/2
2 16
TE
820 pF
1
RT CT
Pin no. refers
to DIP package
VE
RS
V
M
V
MA
V
MM
Figure 2. Definition of symbols.
2
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Part Number PBL3717-2
Description Stepper Motor Drive Circuit
Maker Ericsson
Total Page 8 Pages
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