U2352B データシートの表示（PDF） - Atmel Corporation
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U2352B Datasheet PDF : 8 Pages
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U2352B
A time space, Dt, must be observed between switching the
output stage off and on and switching S2 (current
measurement enable switch) in order to avoid incorrect
measurement and incorrect switching-off. To create this
time window, the control voltage V2 is reduced internally
about DV2 = approximately 300 mV and the resulting
voltage, V2*, is compared with the triangular voltage, V1
(see figure 3).
V
0.6 VS
V1
V2
V2*
DV2
0.3 VS
V7
S2
closed
open
Dt
Dt
t
Figure 4. Signal characteristics of pulse width control with time window generation
Absolute Maximum Ratings
Reference point Pin 6, unless otherwise specified
Parameters
Symbol
Value
Unit
Power supply
current
t < 10 ms
Push-pull output stage
Output current
t < 2 ms
Input currents
Input voltages
Storage temperature range
Junction temperature
Ambient temperature
Pin 8
IS
40
mA
Pin 8
iS
400
mA
Pin 7
±IO
20
mA
Pin 7
±iO
100
mA
Pins 4 and 5
±II
10
mA
Pins 1 and 3
II
2
mA
Pins 1, 2 and 3
VI
0 to V8
V
Tstg
–40 to +125
°C
Tj
+125
°C
Tamb
–10 to +100
°C
Thermal Resistance
Junction ambient
Parameters
DIP8
SO8 on PC board
SO8 on ceramic
Symbol
RthJA
RthJA
RthJA
Maximum
110
220
140
Unit
K/W
K/W
K/W
4 (8)
Rev. A3, 15-Jan-01
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