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| DRV101_15 Datasheet, PDF (6/27 Pages) Texas Instruments – PWM SOLENOID/VALVE DRIVER | |||
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TYPICAL PERFORMANCE CURVES (CONT)
At TC = +25°C and VS = +24V, unless otherwise noted.
FLAG OPERATION
OVER-CURRENT LIMIT
(VS = +60V, CD = 110pF, RPWM = 750kâ¦)
FLAG OPERATION
UNDER-CURRENT
(VS = +24V, CD = 110pF, RPWM = 6.04kâ¦)
60V
40V
Onset of
current limit
20V
0
Flag only set
4V
during constant
output mode or
2V
âONâ portion of
PWM mode
0
25µs/div
4V
2V
No Load
0
Flag only on during constant output
or âONâ portion of PWM mode
4V
2V
0
Constant Output
PWM Mode
50µs/div
DC TO PWM MODE
DRIVING INDUCTIVE LOAD
(VS = +60V, CD = 110pF, RPWM = 301kâ¦)
60V
40V
20V
0V
See Duty Cycle Undershoot
2A
curve for detail
1A
0
Inductive load ramp current
50µs/div
DUTY CYCLE UNDERSHOOT
Load = 1A
30V
20V
10V
Non-optimized Layout
0
30V
20V
10V
Clean Layout
0
1µs/div
TYPICAL SOLENOID CURRENT WAVEFORM
(VS = +24V)
1A
0.5A
0
Solenoid
Motion
Period
PWM Mode
Solenoid Closure
25ms/div
OSCILLATOR FREQUENCY vs TEMPERATURE
24.2
24.0
23.8
VS = +9V
23.6
23.4
â75 â55 â35
VS = +60V
â15 5 25 45 65 85
Temperature (°C)
105 125
6
DRV101
www.ti.com
SBVS008B
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