DIONICS, INC.
65 Rushmore Street
Westbury, NY 11590
Phone: (516) 997-7474
Fax: (516) 997-7479
Website: www.dionics-usa.com
DIH-134 Power MOSFET Dual N/O SPST Photovoltaic DC Relay
Features:
Package Contains Two N/O DC Relays;
Fast Switching Speeds
Optically Isolated to 400V DC.
Immune to False Triggering
Small size, Hermetic 8-pin SIP Package
Designed to Meet MIL-R28750 and 28V DC
System Surge and Spike Requirement of MIL
STD-704.
Y-Level MIL-Screening Available (DIH-134Y)
Applications:
Replacement of Mechanical Relays
Motor Control & Power Control
Aircraft Flight Control Systems
A.T.E (Automatic Test Equipment)
Load Control From Processor I/O Ports
Power Supply Circuits
Medical Electronics
Description:
The DIH-134 is a State-of-the-Art Photovoltaic Solid State Relay designed for 28V DC Aircraft power applications where
speed, current overload protection and immunity to transient voltages are critical.
The DIH-134 contains current limiting networks and thermally sensitive integrated circuits that disable the output, if the
output MOSFETs approach an unsafe operating temperature. Because the thermally sensitive integrated circuits have
built-in hysteresis, the output MOSFETs are automatically restarted when a safe temperature is reached. This auto restart
feature eliminates the need for system restart signals. If the overload condition continues to exist, the cycle is repeated; if
the overload condition is removed, the relay returns to normal operation.
The package contains two independent N/O relays, with separate LED inputs and optically isolated power MOSFET
outputs. Each relay, A or B, is capable of carrying 350mA DC continuous current and 500mA DC peak current. Each
LED optically couples to a Photovoltaic (PV) IC chip which responds by generating a voltage. This voltage is internally
connected to the Gate and Source terminals of the output MOSFETs, thus controlling their current. The DIH-134 is also
available screened to military specifications, as required.
Pin Designations
Relay A
Relay B
1
Input +
5
Input +
2
Input -
6
Input -
3
Output -
7 Output -
4 Output + 8 Output +
* DIH-134 Equivalent Circuit
Thermal
Sensor
Rs
NPN
Enh.
LED
PV
A-1 ; B-5
A-4 ; B-8
100 Ohms
A-3 ; B-7
A-2 ; B-6
Thermal
Link
* Package Layout:
Weight 1.5 Grams
0.046 Typ
.
0.780 Max
.
0.010
0.270 Max.
0.120 Max
.
DIONICS INC
.
xxxx
0.100
0.040
DIH-134
0.020
0.300 Min
.
02/2002
DIH-134: Power MOSFET Dual SPST Photovoltaic DC Relay
Electrical Characteristics (Per Relay @ 25
0
C unless otherwise specified):
v
Relay A: Normally Open (N/O)
v
Relay B: Normally Open (N/O)
v
Input Characteristics
Symbol
Parameter
Min.
Typ. Max. Unit
I
in
Input Current
5.0
15.0
24.0 mA
V
in
Input Voltage Drop
1.3
1.5
V
V
rev.
Reverse Voltage
10.0
V
V
on
On State Voltage
3.5
V
V
off
Off State Voltage
1.5
V
v
Output Characteristics
Symbol
Parameter
Typ.
Max.
Unit
Condition
I
load
Load Current
350 / 500
mA
Continuous / Peak
R
on
On Resistance
3
I
in
=18 (mA); I
load
= 100mA
@ T
a
= 85
0
C
4
I
in
=18 (mA); I
load
= 100mA
I
leak
Leakage Current
10
A
V
op
=75 (V)
R
iso
Input/Output Resistance
10
8
V
op
Operating Voltage
28
30.3
VDC
Limited by Power Dissipation
BV Breakdown Voltage
80
VDC
At 100
A
T
on
Turn-On Time
150
300
s
V
in
= 4.5V, P.W* = 100
s; V
op
= 30V
T
off
Turn-Off Time
150
300
s
V
in
= 4.5V, P.W =100
s; V
op
= 30V
V
iso
Input-Output Isolation
400
V
DC
P
Maximum Power Dissipation
400
mW
In Free Air
PW*: Pulse Width.
v
Timing Diagram
Td(on)
Vop
10%
T(on)
Td(off)
Output
90%
90%
10%
10%
Input
0V
T(off)
0V
5V
90%
v
Environmental Ratings:
Storage Temperature: -25
0
C to +125
0
C
Constant Acceleration: 5000G
Hermeticity: + Gross 1x10
-5
atm cc/sec
+ Fine 5 x 10
-8
atm cc/s **
** When screened to MIL-Specs.
02/2002
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