LH1533 データシートの表示（PDF） - Siemens AG
部品番号
コンポーネント説明
メーカー
LH1533 Datasheet PDF : 25 Pages
| |||
Functional Description
Figure 3 shows the switch characteristics of the relays.
The relay exhibits an ON-resistance that is exception-
ally linear through the origin and up to the knee current
(Ik). Beyond Ik, the incremental resistance decreases,
minimizing internal power dissipation. Overload
currents are clamped at ILMT by the internal current-limit
circuitry. The current-limiting circuitry exhibits a nega-
tive temperature coefficient, thereby reducing the
current-limit value when relay temperature is increased.
An extended clamp condition, which increases relay
temperature, decreases the current-limit value,
resulting in a current foldback characteristic. When the
overload is removed, the relay resumes its normal ON-
resistance characteristic.
Figure 3. Typical ac/dc ON Characteristics
+I
210 mA
ILMT
10 W
-V 16 W
10 W
ILMT
IK
60 mA
-1.5 V
IK
1.5 V
-60 mA
-210 mA
-I
16 W
+V
In a 1 Form A relay, to turn the relay on, forward current
is applied to the LED. The amount of current applied
determines the amount of light produced for the photo-
diode array. This photodiode array develops a drive-
voltage for the MOSFET switch outputs. For high-
temperature or high-load current operations, more LED
current is required.
Thermal Considerations
To minimize thermal resistance, pins 6 and 7 of the
LH1525ACD are formed into a tab. This tab should be
soldered to a printed circuit board land pattern of equal
or greater size. Do Not run metal underneath the
device or the input-to-output isolation could be jeopar-
dized.
Absolute Maximum Ratings At 25°C
Stresses in excess of the Absolute Maximum Ratings
can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the
device is not implied at these or any other conditions in
excess of those given in the operational sections of the
data sheet. Exposure to Absolute Maximum Ratings for
extended periods can adversely affect the device reli-
ability.
Parameter
Ambient Operating Temperature Range
Storage Temperature Range
Pin Soldering Temperature (t=5 s max.)
Input/Output Isolation Voltage
LED Input Ratings:
Continuous Forward Current
Reverse Voltage
Output Operation:
dc or Peak ac Load Voltage (IL £ 50 mA)
Continuous dc Load Current:
One pole operating
Power Dissipation:
LH1525
Thermal Resistance, Junction to Ambient
Symbol
TA
Tstg
TS
VISO
IF
VR
VL
IL
PDISS
RQJA
Value
–40 to +85
–55 to +150
260
1500
50
5
400
110
550
120
Unit
°C
°C
°C
Vrms
mA
V
V
mA
mW
C/W
Siemens Microelectronics, Inc. • Optoelectronics Division
www.smi.siemens.com/opto/
9 of 25
LH1525ACD
October 1998
Share Link: 