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DRV102 Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer DRV102
Beschreibung PWM SOLENOID/VALVE DRIVER
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 19 Seiten
DRV102 Datasheet, Funktion
®
DRV102
DRV102
DRV102
For most current data sheet and other product
information, visit www.burr-brown.com
PWM SOLENOID/VALVE DRIVER
FEATURES
q HIGH OUTPUT DRIVE: 2.7A
q WIDE SUPPLY RANGE: +8V to +60V
q COMPLETE FUNCTION
PWM Output
Internal 24kHz Oscillator
Digital Control Input
Adjustable Delay and Duty Cycle
Over/ Under Current Indicator
q FULLY PROTECTED
Thermal Shutdown with Indicator
Internal Current Limit
q POWER PACKAGES: 7-Lead TO-220 and
7-Lead Surface-Mount DDPAK
APPLICATIONS
q ELECTROMECHANICAL DRIVER:
Solenoids Positioners
Actuators High Power Relays/Contactors
Valves
Clutches/Brakes
q SOLENOID OVERHEAT PROTECTORS
q FLUID AND GAS FLOW CONTROLLERS
q PART HANDLERS
q ELECTRICAL HEATERS/COOLERS
q MOTOR SPEED CONTROLLERS
q INDUSTRIAL CONTROL
q FACTORY AUTOMATION
q MEDICAL ANALYSIS
q PHOTOGRAPHIC PROCESSING
DESCRIPTION
The DRV102 is a high-side power switch employing
a pulse-width modulated (PWM) output. Its rugged
design is optimized for driving electromechanical de-
vices such as valves, solenoids, relays, actuators, and
positioners. The DRV102 is also ideal for driving
thermal devices such as heaters and lamps. PWM
operation conserves power and reduces heat rise in the
device, resulting in higher reliability. In addition, ad-
justable PWM allows fine control of the power deliv-
ered to the load. Time from dc output to PWM output
is externally adjustable.
The DRV102 can be set to provide a strong initial
closure, automatically switching to a “soft” hold mode
for power savings. Duty cycle can be controlled by a
resistor, analog voltage, or digital-to-analog converter
for versatility. A flag output indicates thermal shut-
down and over/under current limit. A wide supply
range allows use with a variety of actuators.
The DRV102 is available in 7-lead staggered TO-220
package and a 7-lead surface-mount DDPAK plastic
power package. It operates from –55°C to +125°C.
Flag
Input 1
On (TTL-Compatible)
Off
Thermal Shutdown
Over/Under Current
24kHz
Oscillator
7
DRV102
5
(+8V to +60V)
VS
PWM
Delay
2
3 Gnd(1) 4
6
Out
Delay
Adjust
Duty Cycle
Adjust
(Gnd electrically
connected to tab)
Load
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111
Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1998 Burr-Brown Corporation
PDS-1471B
Printed in U.S.A. March, 1999






DRV102 Datasheet, Funktion
TYPICAL PERFORMANCE CURVES (CONT)
At TC = +25°C and VS = +24V, unless otherwise noted.
FLAG OPERATION
OVER-CURRENT LIMIT
(VS = +60V, CD = 220pF, RPWM = 25.5k, Load = 350mH || 47)
60V
Onset of current limit where
VOUT begins to drop
40V
20V
0
Flag only set during
4V constant output mode
or “ON” portion of
2V PWM mode
0
50µs/div
FLAG OPERATION
UNDER-CURRENT
(VS = +60V, CD = 120pF, RPWM = 25.5k, No Load)
60V
40V
20V
Flag only on during constant output
0 or “ON” portion of PWM mode
4V
2V
0
Constant Output
PWM Mode
50µs/div
DC TO PWM MODE
DRIVING INDUCTIVE LOAD
(VS = +60V, CD = 120pF, RPWM = 30.1k, Load = 350mH)
60V
40V
20V
0
1A
0.5A
0
Inductive load ramp current
50µs/div
TYPICAL SOLENOID CURRENT WAVEFORM
(VS = +60V, CD = 0.1µF, RPWM = 30.1k, Load = 350mH)
4V
0
1A
0.5A
0
Solenoid
Motion
Period
PWM Mode
Solenoid Closure
25ms/div
5V
2.5V
0
3A
2A
1A
0
CURRENT LIMIT REPSONSE
(Load = 1, 2kpull-up to +5V on Flag pin)
10µs/div
24.2
OSCILLATOR FREQUENCY vs TEMPERATURE
24.0
23.8
VS = +8V
23.6
23.4
–75 –55 –35
VS = +60V
–15 5 25 45 65 85
Temperature (°C)
105 125
®
DRV102
6

6 Page









DRV102 pdf, datenblatt
PACKAGE MOUNTING
Figure 10 provides recommended PCB layouts for both the
TO-220 and DDPAK power packages. The tab of both
packages is electrically connected to ground (pin 4). It may
be desirable to isolate the tab of TO-220 package from its
mounting surface with a mica (or other film) insulator (see
Figure 11). For lowest overall thermal resistance, it is best to
isolate the entire heat sink/DRV102 structure from the
mounting surface rather than to use an insulator between the
semiconductor and heat sink.
For best thermal performance, the tab of the DDPAK sur-
face-mount version should be soldered directly to a circuit
board copper area. Increasing the copper area improves heat
dissipation. Figure 12 shows typical thermal resistance from
junction-to-ambient as a function of the copper area.
POWER DISSIPATION
Power dissipation depends on power supply, signal, and load
conditions. Power dissipation is equal to the product of
7-Lead TO-220
(Package Drawing #327)
7-Lead DDPAK(1)
(Package Drawing #328)
0.51
0.04
0.05
Mean dimensions in inches. Refer to end of data sheet
or Appendix C of Burr-Brown Data Book for tolerances
and detailed package drawings. For further information
on solder pads for surface-mount devices consult
Application Bulletin AB-132.
0.105
0.05
0.035
NOTE: (1) For improved thermal performance increase footprint area.
See Figure 12, “Thermal Resistance versus Circuit Board Copper Area”.
FIGURE 10. TO-220 and DDPAK Solder Footprints.
THERMAL RESISTANCE
vs ALUMINUM PLATE AREA
18
Vertically Mounted
in Free Air
16
Aluminum Plate Area
Flat, Rectangular
Aluminum Plate
14
0.030
12
10
Aluminum Plate
Thickness (inches)
8
01 2 3
0.050
4
0.062
56
Aluminum Plate Area (inches2)
7
8
Optional mica or film insulator
for electrical isolation. Adds
DRV102
approximately 1°C/W.
TO-220 Package
FIGURE 11. TO-220 Thermal Resistance versus Aluminum Plate Area.
®
DRV102
12

12 Page





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