DIONICS, INC.
65 Rushmore Street
Westbury, NY 11590
Phone: (516) 997-7474
Fax: (516) 997-7479
Website:
www.dionics-usa.com
DIH-128 Power MOSFET SPST Photovoltaic AC-DC N/O Relay
Features:
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Low Level Logic Compatibility
Optical Isolation to 400VDC
Low On Resistance, Low Offset Voltage
Low Off-State Leakage Current.
High Speed Switching Response.
High Transient Immunity, No False Turn on
Hermetically Sealed 6-Pin Mini DIP Foot Print
Designed To Meet MIL-R-28750
Y-Level MIL-Screening Available (DIH-128Y)
Applications:
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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
High-side DC Power Switching
Power Supply Circuits
Medical Electronics
Description:
The DIH-128 is a State-of-the-Art Photovoltaic Solid State Relay designed for A.T.E. applications where speed, on-
resistance and leakage current are critical. These photovoltaic relays incorporate an infrared LED input, a photovoltaic
(PV) diode array including a unique turn-off circuit connected to the gates of a pair of high voltage MOSFETs as output.
The photovoltaic diode array is a series-connected group of photosensitive diodes, which are electrically isolated from,
but optically coupled to, the input LED. Input/Output isolation is rated at 400 VDC.
When activated, the LED emits infrared light toward the photovoltaic diode array, which then responds with a self-
generated open circuit voltage, V
oc
, proportional to the LED input current. This V
oc
,
which is floating and completely
isolated from any power supply, is applied to the Gates of the MOSFETs. At the proper value of the input LED current,
the generated V
oc
is sufficient to turn on the MOSFETs and cause the relay to conduct. The MOSFET outputs provide
thermal stability, immunity from false turn-on, and low offset voltage.
* DIH-128 Schematic
6
PV
LED
1
0.420
0.300
6
* Package Lay out:
0.420
5
4
Enh.
5
2
Enh.
DIONICS
DIH-128
XXXX
KOVAR, AU - PLATED
KOVAR, NI - PLATED
GLASS
4
1
2
3
v
Pin Designation
Pin number
Function
1
Input +
2
Input -
3
Case
4
Output Drain
5
Output Common Source
6
Output Drain
0.020
0.175
0.020
0.100
0.018 Typ.
0.150
12/2001
1
2
