DIONICS, INC.
Phone: (516) 997-7474
65 Rushmore Street Fax: (516) 997-7479
Westbury, NY 11590 Website: www.dionics-usa.com
DIH-134-SM 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
Hermetic Gull-Wing Surface Mount Package
Y-Level MIL-Screening Available (DIH-134-SMY)
Designed to Meet MIL-R28750 and 28V DC System
Surge and Spike Requirement of MIL STD-704.
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
Tactical Aircraft
Operation Temp. 40
0
C to 85
0
C @ 200mA Load (Above 85
0
C Derate Load 5mA /
0
C)
Description:
The DIH-134-SM 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-SM 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 gull-wing surface mount 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-SM is also available screened to military specifications, as required.
Package Layout:
DIH-134-SM Equivalent Circuit:
0.445
0.555 0.010
0.015
0.395 SQ. MAX.
XXXX
DIH-134-SM
0.300
0.050
DIONICS INC.
02/2003
Rs
100 Ohms
A-12; B-8
Enh.
Thermal
Sensor
NPN
A-14; B-10
A-3; B-7
Thermal Link
A-1; B-5
LED
PV
0.005
0.120 MAX.
DIH-134-SM: 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
Output Characteristics
Symbol
Parameter
Typ.
Max.
Unit
Conditions
I
load
Load Current
350 / 500
mA
Continuous / Peak
R
on
On Resistance
2
I
in
=18 (mA); I
load
= 100mA
@ T
a
= 85
0
C
3
I
in
=18 (mA); I
load
= 100mA
I
leak
Leakage Current
10
A
V
op
=90 (V)
R
iso
Input/Output Resistance
10
8
V
op
Operating Voltage
28
60
VDC
Limited by Power Dissipation
BV
Breakdown Voltage
95
VDC
At 100
A
T
on
Turn-On Time
150
300
s
V
in
= 4.5V, P.W* = 100ms; V
op
= 30V
T
off
Turn-Off Time
20
40
s
V
in
= 4.5V, P.W =100ms; 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: -55
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.
v
Pin Designations
Relay
Pin
Number
Inputs
Pin
Number
Outputs
Relay
1
A +
14
Drain A +
A
3
A
-
12
Source A
-
Relay
5
B +
10
Drain B +
B
7
B
-
8
Source B
-
2,4,6
NC
9,11,13
NC
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
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