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L295 датащи(PDF) 5 Page - STMicroelectronics

номер детали L295
подробное описание детали  DUAL SWITCH-MODE SOLENOID DRIVER
PDF  7 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L295 датащи(HTML) 5 Page - STMicroelectronics

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L295
the junction temperature of about 20°C.
The analog input pins (Vref1, Vref2) can be left open or connected to Vss; in this case the circuit works with
an internal reference voltage of about 2.5V and the peak current in the load is fixed only by the value of Rs:
I
P
2.5
R
S
--------
=
SIGNAL WAVEFORMS
Figure 1. Load current waveform with pin 9
connected to GND.
Figure 2. Load current waveform with external
R-C network connected between pin 9 and
ground.
Figure 3. With Vref changed by hardware.
Figure 4. Switching frequency vs. values of R
and C.
D03IN1504
I
IP
t0
t1
t2
t
Vi
⋅ EN
t
ON
Q1
OFF
t
VREF
t
ON
Q2
OFF
t
D03IN1505
I
IP
t0
t1 t2 t3 t4
tn
t5
t
Vi
⋅ EN
t
ON
Q1
OFF
t
VREF
t
ON
Q2
OFF
t
D03IN1506
I
Ip
In
t0
t1 t2 t3
tn
t
Vi
⋅ EN
t
ON
Q1
OFF
t
VREF
t
ON
Q2
OFF
t
1
10
100
R(K
Ω)
1
10
f
(KHz)
D03IN1507
fo=25KHz
Rmin



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