U2352
| Model | U2352 |
| Description | PWM Power Control for DC Loads |
| PDF file | Total 8 pages (File size: 113K) |
| Chip Manufacturer | TEMIC |
U2352B
A time space,
D
t, must be observed between switching the
output stage off and on and switching S
2
(current
measurement enable switch) in order to avoid incorrect
measurement and incorrect switching-off. To create this
time window, the control voltage V
2
is reduced internally
about
D
V
2
= approximately 300 mV and the resulting
voltage, V
2
*, is compared with the triangular voltage, V
1
(see figure 3).
V
0.6
V
S
V
2
V
2
*
0.3 V
S
V
1
95 9672
D
V
2
V
7
S
2
closed
open
D
t
D
t
t
Figure 3. Signal characteristics of pulse width control with time window generation
Absolute Maximum Ratings
Reference point Pin 6, unless otherwise specified
Parameters
Power supply
current
t < 10
m
s
Push-pull output stage
Output current
t < 2 ms
Input currents
Input voltages
Storage temperature range
Junction temperature
Ambient temperature
Pin 8
Pin 8
Pin 7
Pin 7
Pins 4 and 5
Pins 1 and 3
Pins 1, 2 and 3
Symbol
I
S
i
S
±I
O
±i
O
±I
I
I
I
V
I
T
stg
T
j
T
amb
Value
40
400
20
100
10
2
0 to V
8
–40 to +125
+125
–10 to +100
Unit
mA
mA
mA
V
°C
°C
°C
Thermal Resistance
Parameters
Junction ambient
DIP8
SO8 on PC board
SO8 on ceramic
Symbol
Maximum
110
220
140
Unit
R
thJA
K/W
4 (8)
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
