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PDF DRV104 Data sheet ( Hoja de datos )
| Número de pieza | DRV104 | |
| Descripción | 1.2A PWM High-Side Driver for Solenoids | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DRV104 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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DRV104
DRV104 ®
SBVS036A – SEPTEMBER 2003 – REVISED NOVEMBER 2003
1.2A PWM High-Side Driver
for Solenoids, Coils, Valves, Heaters, and Lamps
FEATURES
q HIGH OUTPUT DRIVE: 1.2A
q WIDE SUPPLY RANGE: +8V to +32V
q COMPLETE FUNCTION:
PWM Output
Adjustable Internal Oscillator: 500Hz to 100kHz
Digitally Controlled Input
Adjustable Delay and Duty Cycle
Over-Current Indicator Flag
q FULLY PROTECTED:
Thermal Shutdown with Indicator Flag
Internal Current Limit
q PACKAGE: HTSSOP-14 Surface-Mount PowerPAD™
APPLICATIONS
q ELECTROMECHANICAL DRIVERS:
Solenoids, Valves, Positioners, Actuators, Relays,
Power Contactor Coils, Heaters, and Lamps
q FLUID AND GAS FLOW SYSTEMS
q FACTORY AUTOMATION
q PART HANDLERS AND SORTERS
q PHOTOGRAPHIC PROCESSING
q ENVIRONMENTAL MONITORING AND HVAC
q THERMOELECTRIC COOLERS
q MOTOR SPEED CONTROLS
q SOLENOID PROTECTORS
DRV104
q MEDICAL ANALYZERS
DESCRIPTION
The DRV104 is a DMOS, high-side power switch employing
a pulse-width modulated (PWM) output. Its rugged design is
optimized for driving electromechanical devices such as
valves, solenoids, relays, actuators, and positioners. It is also
ideal for driving thermal devices such as heaters, coolers,
and lamps. PWM operation conserves power and reduces
heat rise, resulting in higher reliability. In addition, adjustable
PWM allows fine control of the power delivered to the load.
Time from dc-to-PWM output and oscillator frequency are
externally adjustable.
Separate supply pins for the circuit and driver transistor allow
the output to operate on a different supply than the rest of the
circuit.
The DRV104 can be set to provide a strong initial solenoid
closure, automatically switching to a soft hold mode for
power savings. The duty cycle can be controlled by a
resistor, analog voltage, or a digital-to-analog (D/A) converter
for versatility. The Status OK Flag pin indicates when thermal
shutdown or over-current occurs.
The DRV104 is specified for –40°C to +85°C at its case. The
exposed lead frame must be soldered to the circuit board.
Thermal Shutdown
Over/Under Current
Status OK
Flag
+VS
VREF
Oscillator
+VPS1
+VPS2
Input
On
Off
Delay
PWM
Delay
Adj
Osc Freq Duty Cycle
Adj Adj
GND
OUT1
OUT2
BOOT
Coil
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright © 2003, Texas Instruments Incorporated
1 page  
TYPICAL CHARACTERISTICS
At TC = +25°C and VS = +24V, unless otherwise noted.
VOUT AND ISOLENOID WAVEFORMS WITH SOLENOID LOAD
Input
VOUT
0
+VS PWM Mode
0
ON
0
pull-in
50
Time (ms)
2
drop-out
1
0
100
VOUT AND IOUT WAVEFORMS WITH RESISTIVE LOAD
PWM Mode
+VS
0
+VS
RL
0
ON
0
IAVG
50
Time (ms)
2
1
0
100
CURRENT LIMIT SHUTDOWN WAVEFORMS
VIN Off
On
Off
Status
OK
Flag
OK OK
OK
OK
OK OK
OK
VOUT
5
0
24
0
24
0
0 50 100
Time (µs)
0.70
QUIESCENT CURRENT vs TEMPERATURE
0.65
0.60
32V 24V
12V
0.55
0.50
0.45
8V
0.40
–60
–10 40
90
Temperature (°C)
140
CURRENT LIMIT SHUTDOWN vs TEMPERATURE
2.5
2.3
2.1
1.9
1.7
1.5
1.3
–60
–10 40
90
Temperature (°C)
140
DELAY TO PWM vs TEMPERATURE
88
CD = 0.1µF
86
84
82
24V
80
12V, 8V
78
–60
32V
–10 40
90
Temperature (°C)
140
DRV104
SBVS036A
www.ti.com
5
5 Page 
PACKAGE MOUNTING
Figure 12 provides recommended printed circuit board (PCB)
layouts for the PowerPAD HTSSOP-14 package. The metal
pad of the PowerPAD HTSSOP-14 package is electrically
isolated from other pins and ideally should be connected to
a ground. For reliable operation, the PowerPAD must be
directly soldered to a circuit board, as shown in Figure 13.
Increasing the heat-sink copper area improves heat dissipa-
tion. Figure 14 shows typical junction-to-ambient thermal
resistance as a function of the PCB copper area.
Signal Trace
DRV104 Die
Pad-to-Board
Solder
Copper Traces
Copper Pad
Thermal Vias
FIGURE 13. PowerPAD Heat Transfer.
THERMAL RESISTANCE vs
PCB COPPER AREA
80
DRV104
PowerPAD
70 Surface-Mount Package
1oz. Copper
60
50
40
30
0
1234
Copper Area (inches2)
5
FIGURE 14. Heat-Sink Thermal Resistance vs PCB Copper
Area.
POWER DISSIPATION
The DRV104 power dissipation depends on power supply,
signal, and load conditions. Power dissipation (PD) is equal to
the product of output current times the voltage across the
conducting DMOS transistor times the duty cycle. Using the
lowest possible duty cycle necessary to assure the required
hold force can minimize power dissipation in both the load and
in the DRV104. At 1A, the output DMOS transistor on-resis-
tance is 0.45Ω, increasing to 0.65Ω at current limit.
3.5
2.0
2.4
2.0
1.0
2.0
Solder Attachment
to PCB
0.65
0.0
FIGURE 12. Recommended PCB Layout.
(all dimensions in mm)
DRV104
SBVS036A
www.ti.com
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet DRV104.PDF ] | |
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