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參數(shù)資料
| 型號： | DRV101 |
| 英文描述： | PWM SOLENOID/VALVE DRIVER |
| 中文描述： | 脈寬調(diào)制電磁/閥驅(qū)動 |
| 文件頁數(shù)： | 9/19頁 |
| 文件大?。?/td> | 298K |
| 代理商： | DRV101 |
9
DRV101
APPLICATIONS INFORMATION
POWER SUPPLY
The DRV101 operates from a single +9V to +60V supply
with excellent performance. Most behavior remains un-
changed throughout the full operating voltage range. Param-
eters which vary significantly with operating voltage are
shown in the Typical Performance Curves.
ADJUSTABLE INITIAL 100% DUTY CYCLE
A unique feature of the DRV101 is its ability to provide an
initial constant dc output (100% duty cycle) and then switch
to PWM mode to save power. This function is particularly
useful when driving solenoids which have a much higher
pull-in current requirement than hold requirement.
The duration of this constant dc output (before PWM output
begins) can be externally controlled with a capacitor con-
nected from Delay Adjust (pin 2) to ground according to the
following equation:
Delay Time
≈
C
D
10
6
(time in seconds, C
D
in Farads)
Leaving the Delay Adjust pin open results in a constant
output time of approximately 15
μ
s. The duration of this
initial output can be reduced to less than 3
μ
s by connecting
the pin to 5V. Table I provides examples of desired “delay”
times (constant output before PWM mode) and the appropri-
ate capacitor values or pin connection.
CONSTANT OUTPUT DURATION
C
D
3
μ
s
15
μ
s
100
μ
s
1ms
100ms
Pin connected to 5V
Pin open
100pF
1nF
0.1
μ
F
TABLE I. Delay Adjust Pin Connections.
ADJUSTABLE DUTY CYCLE
The DRV101’s externally adjustable duty cycle provides an
accurate means of controlling power delivered to the load.
Duty cycle can be set from 10% to 100% with an external
resistor, analog voltage, or the output of a D/A converter.
Reduced duty cycle results in reduced power dissipation.
This keeps the DRV101 and load cooler, resulting in in-
creased reliability for both devices. PWM frequency is a
constant 24kHz.
Resistor Controlled Duty Cycle
Duty cycle is easily programmed with a resistor (R
PWM
)
connected between the Duty Cycle Adjust pin and ground.
Increased resistor values correspond to decreased duty cycles.
Table II provides resistor values for typical duty cycles.
Resistor values for additional duty cycles can be obtained
from Figure 3. For reference purposes, the equation for
calculating R
PWM
is included in Figure 3.
FIGURE 3. R
PWM
vs Duty Cycle.
FIGURE 2. Simplified Circuit Model of the Delay Adjust Pin.
The internal Delay Adjust circuitry is composed of a 3
μ
A
current source and a 3V comparator as shown in Figure 2.
Thus, when the pin voltage is less than 3V, the output device
is 100% on (dc output mode).
3μA
2
C
D
V
S
3V Reference
Comparator
Delay Adjust
DRV101
RESISTOR
(1)
R
PWM
(k
)
VOLTAGE
(2)
V
PWM
(V)
DUTY CYCLE
10
20
30
40
50
60
70
80
90
976
205
84.5
46.4
28.7
18.2
11.8
7.50
4.87
3.7
3.4
3.0
2.6
2.2
1.75
1.35
1.00
0.75
NOTES: (1) Resistor values listed are nearest 1% standard values. (2) Do not
drive pin below 0.1V. For additional values, see “Duty Cycle vs Voltage” typical
performance curve.
TABLE II. Duty Cycle Adjust. T
A
= +25
°
C, V
S
= +24V.
10
20
40
60
100
80
Duty Cycle (%)
R
P
)
1000
100
10
1
R
PWM
= [ a + b (DC) + c (DC)
2
+ d (DC)
3
+ e (DC)
4
]
–1
where: a = 2.4711 x 10
–6
b = –5.2095 x 10
–7
c = 4.4576 x 10
–8
d = –7.6427 x 10
–10
e = 6.8039 x 10
–12
R
PWM
= [2.4711 x 10
–6
+ (–5.2095 x 10
–7)
(50) + (4.4576 x 10
–8
) (50)
2
+ (–7.6427 x 10
–10
) (50)
3
+ (6.8039 x 10
–12
) (50)
4
]
–1
= 28.7k
DC = duty cycle in %
For 50% duty cycle:
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| DRV101F | 制造商:BB 制造商全稱:BB 功能描述:PWM SOLENOID/VALVE DRIVER |
| DRV101F/500 | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 PWM Solenoid/ Valve Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| DRV101FKTWT | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 PWM Solenoid/ Valve Driver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| DRV101FKTWT | 制造商:Texas Instruments 功能描述:DRIVERS 制造商:Texas Instruments 功能描述:IC, SOLENOID/VALVE DRVR 1CH 2.3A D2PAK-7 |
| DRV101FKTWTG3 | 功能描述:馬達(dá)/運(yùn)動/點(diǎn)火控制器和驅(qū)動器 PWN SOLENOID/VALVE DRIVER RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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