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CS3720
CS3720
2A H-Bridge Driver
Description
The CS3720 is high current (2A typ) bidirectional DC motor driver. The H-bridge output stage consists of two pairs of power NPN transistors, each with a VSAT=2.3V at IOUT=2A (typ). The three TTL compatible inputs, ENABLE1, ENABLE2, and DIRECTION 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 settings disables the outputs. The CS3720 is protected against overvoltage fault conditions. If a fault condition is detected, the IC shuts down.
Features
s High Current (2A typ) Output s TTL compatible DIRECTION Control s Fault Protection Overvoltage Load Dump Protection to 74V
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 .....................................................-40C to +150C Storage Temperature Range.......................................................-65C to +150C Lead Temperature Soldering Wave Solder (through hole styles only) ............10 sec. max, 260C peak Reflow (SMD styles only) .............60 sec. max above 183C, 230C peak Electrostatic Discharge (Human Body Model).............................................2kV Block Diagram
VSS
VREF Transient Protection Over Current Protection OUTPUT DRIVER +
Package Options
7 Lead Power SIP
2 4 6 8 10 12 14 ENABLE1 DIRECTION COIL+ Gnd COIL VSS ENABLE2
Q1
Q3
Over Current Protection
Overvoltage Protection
COIL + COIL -
7 Lead TO-220
7 Lead D2PAK
ENABLE1 ENABLE2 DIRECTION
DRIVE CONTROL LOGIC
OUTPUT DRIVER
Q4
Q2
1 2 3 4 5 6 7
1
ENABLE1 DIRECTION COIL+ Gnd VSS COIL ENABLE2
1
Gnd
Cherry Semiconductor Corporation 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com
Rev. 5/4/99
1
A
Company
CS3720
Electrical Characteristics: 5.5V VCC 17V; 40C TJ +150C; 40C TC +105C; 40C TA 105C; unless otherwise specified. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
s
Output Stage Quiescent Current IOUT=0mA; ENABLE1=DIRECTION= High ENABLE2=Low IOUT=2A IOUT=500mA IOUT=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 A A
2.0 0.8 10 -250 RLOAD=301/2; Coil=5mH; CLOAD=15pF RLOAD=301/2; Coil=5mH; CLOAD=15pF 50 5 50 5
V V A A s s
IOUT = 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 D2PAK 1 2 3 4 5 6 7 ENABLE1 DIRECTION COIL+ Gnd VSS COILENABLE2 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
COILLow High OFF OFF
Current flow through the two outputs COIL+ and COILis 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
VSS VSS
VSS COIL +
D1
D1 LLOAD 5mH RLOAD 30W CLOAD 0.1mF
CS3720
mP I/O ENABLE1 ENABLE2 DIRECTION Gnd
COIL -
D1
D1 D1 = 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
50ms Turnoff Delay
COIL
90%
50ms 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 D2PAK (DPS)* Short-Leaded
1.68 (.066) 1.40 (.055) 10.31 (.406) 10.05 (.396) 1.40 (.055) 1.14 (.045)
Thermal Data RQJC typ RQJA typ
7L 7L D2PAK TO-220 2.1 2.1 10-50* 50
7L Power SIP 2.1 uC/W 35 uC/W
*Depending on thermal properties of substrate. RQJA=RQJC + RQCA.
8.53 (.336) 8.28 (.326)
14.71 (.579) 13.69 (.539)
2.79 (.110) 2.54 (.100)
7 Lead TO-220 (T) Straight
1.98 (.078) 1.47 (.058)
0.91 (.036) 0.66 (.026) TERMINAL 8 6.50 (.256) REF
1.27 (.050) REF
.254 (.010) REF
7.75 (.305) REF
4.57 (.180) 4.31 (.170)
10.54 (.415) 9.78 (.385) 2.87 (.113) 2.62 (.103)
0.10 (.004) 0.00 (.000)
4.83 (.190) 4.06 (.160)
1.40 (.055) 1.14 (.045)
6.55 (.258) 5.94 (.234)
3.96 (.156) 3.71 (.146)
14.99 (.590) 14.22 (.560)
*CHERRY SEMICONDUCTOR SHORT-LEADED FOOTPRINT
7 Lead Power SIP (M) Straight
20.02 (.788)
14.22 (.560) 13.72 (.540)
0.94 (.037) 0.58 (.023)
1.40 (.055) 1.14 (.045)
17.50 (.689) 10.69 (.421)
0.64 (.025) 0.38 (.015) 7.75 (.305) 7.49 (.295)
0.56 (.022) 0.36 (.014)
2.92 (.115) 2.29 (.090)
1.1 (.043)
10.9 (.429)
0.79 (.031) MAX.
2.54 (.100)
15.24 (.600)
Ordering Information
Part Number CS3720XT7 CS3720XTVA7 CS3720XTHA7 CS3720XM7 CS3720XDPS7 CS3720XDPSR7
Description 7 Lead TO-220 Straight 7 Lead TO-220 Vertical 7 Lead TO-220 Horizontal 7 Lead Power SIP Straight 7 Lead D2PAK Short-Leaded 7 Lead D2PAK Short-Leaded (tape & reel) 4
Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information.
(c) 1999 Cherry Semiconductor Corporation
Rev. 5/4/99

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