CS3720
2A H-Bridge Driver
Description
DE
SI
GN
CS3720
Features
EW
Absolute Maximum Ratings
DC Input Voltage ..................................................................................-0.3 to 28V
Transient Input Voltage ...................................................................... -0.3 to 74V
Internal Power Dissipation......................................................Internally limited
Junction Temperature Range .....................................................-40°C to +150°C
Storage Temperature Range.......................................................-65°C to +150°C
Lead Temperature Soldering
Wave Solder (through hole styles only) ............10 sec. max, 260°C peak
Reflow (SMD styles only) .............60 sec. max above 183°C, 230°C peak
Electrostatic Discharge (Human Body Model).............................................2kV
Block Diagram
RE
CO
MM
EN
DE
D
AR
CH
IV
FO
E
R
N
Transient
Protection
Over
Current
Protection
OUTPUT
DRIVER
+
The CS3720 is high current (2A typ)
bidirectional DC motor driver. The
H-bridge output stage consists of
two pairs of power NPN transis-
tors, each with a V
SAT
=2.3V at
I
OUT
=2A (typ).
The three TTL compatible inputs,
ENABLE1, ENABLE2, and DIREC-
TION control the output stage.
When ENABLE1 is low and
ENABLE2 is high, DIRECTION
determines which way current
flows through the motor coil. Any
other combination of ENABLE set-
tings disables the outputs.
The CS3720 is protected against
overvoltage fault conditions. If a
fault condition is detected, the IC
shuts down.
s
High Current (2A typ)
Output
s
TTL compatible
DIRECTION Control
s
Fault Protection
Overvoltage
Load Dump Protection to
74V
Package Options
7 Lead Power SIP
2
ENABLE1
4
DIRECTION
6
COIL+
8
Gnd
10 COIL–
12 V
SS
14 ENABLE2
V
SS
V
REF
NO
T
Q
1
Q
3
Over
Current
Protection
DE
VI
CE
Overvoltage
Protection
COIL +
COIL -
7 Lead TO-220
7 Lead D
2
PAK
ENABLE1
ENABLE2
DRIVE
CONTROL
LOGIC
DIRECTION
OUTPUT
DRIVER
–
Q
4
Q
2
1
2
3
4
5
6
7
1
ENABLE1
DIRECTION
COIL+
Gnd
V
SS
COIL–
ENABLE2
1
Gnd
ON Semiconductor
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885–3600 Fax: (401)885–5786
N. American Technical Support: 800-282-9855
Web Site: www.cherry–semi.com
December, 2001 - Rev. 5
1
CS3720
Electrical Characteristics: 5.5V
≤
V
CC
≤
17V; –40°C
≤
T
J
≤
+150°C; –40°C
≤
T
C
≤
+105°C; –40°C
≤
T
A
≤
105°C; unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
s
Output Stage
Quiescent Current
I
OUT
= 0mA;
ENABLE1 = DIRECTION = High
ENABLE2 = Low
I
OUT
= 2A
I
OUT
= 500mA
I
OUT
= 0mA
3.0
10
mA
Output Saturation Voltage
Output Leakage Current
Current Limit
s
Logic Control Functions
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
Turn on Delay
Guaranteed by design
Turn off Delay
Guaranteed by design
s
Fault Protection Functions
Overvoltage Shutdown
3.2
2.6
20
V
V
µA
A
2.0
0.8
10
-250
R
LOAD
= 30Ω; Coil = 5mH;
C
LOAD
= 15pF
R
LOAD
= 30Ω; Coil = 5mH;
C
LOAD
= 15pF
50
5
50
5
V
V
µA
µA
µs
µs
I
OUT
= 500mA
18.0
21.5
V
Package Lead Description
PACKAGE LEAD#
LEAD SYMBOL
FUNCTION
15 Lead
Power SIP
2
4
6
8
12
10
14
7 Lead
TO-220
1
2
3
4
5
6
7
7 Lead
D
2
PAK
1
2
3
4
5
6
7
ENABLE1
DIRECTION
COIL+
Gnd
V
SS
COIL-
ENABLE2
Enables output when held low and ENABLE 2 = High
Determines the direction of current flow through COIL+ and
COIL- as long as ENABLE1 = Low and ENABLE2 = High
Positive Output of H bridge to coil
Ground connection
Supply voltage for IC
Negative Output of H bridge to coil
Enables output when held high and ENABLE 1 = Low
Application Hints
Motor Direction Control
ENABLE1 ENABLE2
Low
Low
High
X
High
High
X
Low
DIRECTION
High
Low
X
X
COIL+
High
Low
OFF
OFF
COIL-
Low
High
OFF
OFF
Current flow through the two outputs COIL+ and COIL-
is controlled by the combined settings of ENABLE1,
ENABLE2 and DIRECTION (Table 1). The outputs will be
active only when ENABLE1 is low and ENABLE2 is high.
When DIRECTION is high, current flows out of COIL+
and into COIL-. When DIRECTION is low, current flows
out of COIL- and into COIL+. For any other combination
of ENABLE settings, the outputs are off.
2
Table 1. Logical Control Diagram
CS3720
Application and Test Diagram
V
SS
V
SS
V
SS
COIL +
D
1
D
1
L
LOAD
5mH
R
LOAD
30Ω
C
LOAD
0.1µF
CS3720
µP
I/O
ENABLE1
ENABLE2
DIRECTION
Gnd
COIL -
D
1
D
1
D
1
= IN4001
or equivalent
Note: A heatsink is required for 2A operation.
Figure 1. Delay Times for ENABLE and COIL
ENABLE2 = 2.4V
5V
ENABLE1
DIRECTION
50%
50%
0V
5V
0V
17V
COIL+
0V
10%
17V
0V
ENABLE1 = 0.4V
50%
0V
5V
50µs
Turnoff
Delay
COIL–
90%
50µs
Turnoff
Delay
5V
ENABLE2
50%
DIRECTION
COIL+
0V
17V
10%
0V
17V
90%
COIL–
0V
3
CS3720
Package Specification
PACKAGE DIMENSIONS IN mm (INCHES)
PACKAGE THERMAL DATA
7 Lead D
2
PAK (DPS)* Short-Leaded
1.68 (.066)
1.40 (.055)
10.31 (.406)
10.05 (.396)
1.40 (.055)
1.14 (.045)
Thermal Data
R
ΘJC
typ
R
ΘJA
typ
7L
7L
D
2
PAK TO-220
2.1
2.1
10-50*
50
7L
Power SIP
2.1
°C/W
35
°C/W
8.53 (.336)
8.28 (.326)
14.71 (.579)
13.69 (.539)
2.79 (.110)
2.54 (.100)
1.98 (.078)
1.47 (.058)
AR
CH
IV
FO
E
R
N
TERMINAL 8
6.50 (.256) REF
EW
0.91 (.036)
0.66 (.026)
1.27 (.050)
REF
.254 (.010)
REF
DE
SI
GN
*Depending
on thermal properties of substrate. R
Θ
JA
=R
Θ
JC
+ R
Θ
CA.
7 Lead TO-220 (T) Straight
7.75 (.305)
REF
4.57 (.180)
4.31 (.170)
10.54 (.415)
9.78 (.385)
4.83 (.190)
4.06 (.160)
1.40 (.055)
1.14 (.045)
2.87 (.113)
2.62 (.103)
0.10 (.004)
0.00 (.000)
6.55 (.258)
5.94 (.234)
3.96 (.156)
3.71 (.146)
14.99 (.590)
14.22 (.560)
*ON SEMICONDUCTOR SHORT-LEADED FOOTPRINT
RE
CO
MM
EN
DE
D
20.02 (.788)
7 Lead Power SIP (M) Straight
14.22 (.560)
13.72 (.540)
0.94 (.037)
0.58 (.023)
1.40 (.055)
1.14 (.045)
0.64 (.025)
0.38 (.015)
7.75 (.305)
7.49 (.295)
0.56 (.022)
0.36 (.014)
17.50 (.689)
10.69 (.421)
2.92 (.115)
2.29 (.090)
1.1 (.043)
10.9 (.429)
NO
T
0.79 (.031)
MAX.
2.54 (.100)
15.24 (.600)
Part Number
CS3720XT7
CS3720XTVA7
CS3720XTHA7
CS3720XM7
CS3720XDPS7
CS3720XDPSR7
DE
VI
CE
Ordering Information
Description
7 Lead TO-220 Straight
7 Lead TO-220 Vertical
7 Lead TO-220 Horizontal
7 Lead Power SIP Straight
7 Lead D
2
PAK Short-Leaded
7 Lead D
2
PAK Short-Leaded
(tape & reel)
4
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