DIONICS, INC.
65 Rushmore Street
Westbury, NY 11590
Phone: (516) 997-7474
Fax: (516) 997-7479
Website: www.dionics-usa.com
DIG-11-15-30-DD MOSFET Drivers With Dynamic Discharge*
*US Patent 4,931,656
Features:
Fast Turn Off, Active Gate Discharge
Dielectrically Isolated
Logic Circuit Compatibility
High Open Circuit Voltage Up To 15V
High Operating Temperature
Fast Response Time
High Isolation Resistance
Excellent Input/Output Linearity
Self Limiting Gate Voltage
Applications:
Gate Drive For MOS devices
Gate Drive For SCR
Solid-State Relays
Interface Between Logic Circuits & External Loads
A.T.E. (Automatic Test Equipment)
Switching Equipment
Isolation Amplifiers
Load Control From Microprocessor I/O Ports
Thermocouple Open Detectors
Description:
The photovoltaic MOSFET driver is a State-of- the-Art, optically coupled floating power source used primarily to control
MOSFETs when electrical isolation between input and output is required.
In addition to the infrared LED and photovoltaic diode array, each of the DD (Dynamic Discharge) products contains
circuitry that rapidly discharges the power MOSFET gate when the LED is deactivated. The unique rapid discharge
features of the photovoltaic MOSFET drivers make them particularly useful for high side switching of N-channel
MOSFETs in solid-state relays, DC motor control and switching regulator applications.
The typical input circuit to the LED is a limiting resistor connected in series with the LED. When activated, the LED
emits infrared light towards the photovoltaic diode array, which then responds by generating an open circuit voltage (V
oc
)
and disabling the turn off circuitry. The self-limiting photovoltaic output of the diode array is floating and therefore, can
be safely applied directly to the gate and source of a MOSFET, regardless of the source potential of the MOSFET. When
the LED is deactivated, the active turn off circuit discharges the capacitive input of the MOSFET. The active turn off
circuitry is designed such that the turn off time of the MOSFET is relatively independent of the input capacitance of the
MOSFET over a range of 300 to 5000 pF. Standard packages include low cost plastic mini-dips and hermetic 8-pin DIP
ceramic side brazed.
Pin Designation
Pin Number DIG-11-15-30-DD
1
Input +
2
Input -
3
N.C
4
N.C
5
N.C
6
Output +
7
N.C
8
Output -
v
Equivalent Circuit:
2
3
6
7
LED
PV
1
8
T.O
Cir.
v
Package Layout:
0.185
0.250
DIG-11
15-30-DD
xxxx
0.380
0.025
0.020
0.070
11/2001
DIG-11-15-30-DD MOSFET Drivers With Active Dynamic Discharge
v
Electrical Characteristics (T
a
=25
0
C Unless otherwise specified)
Model Number
DIG-11-15-30-DD
Unit
Parameter & Test Condition
Symbol
Min.
Typ.
Max.
Open Circuit Voltage
V
oc
I
led
= 2mA
12.0
14.5
16.0
V
I
led
= 10mA
14.0
14.8
16.0
V
I
led
= 30 mA; 50% Duty Cycle
14.5
15.0
16.0
V
Short Circuit Current
I
sc
I
led
= 2mA
1.0
8.0
-
A
I
led
= 10mA
10.0
20.0
-
A
I
led
= 30 mA; 50% Duty Cycle
39.0
60.0
-
A
LED Forward Voltage
V
r
I
f
= 20mA
-
1.3
1.7
V
LED Reverse Current
I
r
V
r
= 5V
0.1
10.0
-
A
Off State Voltage
V
off
I
off
= 10mA; I
led
= 0mA
-
0.65
0.75
V
Isolation Voltage
V
iso
2500
-
-
VDC
Temp. Coefficients
V
-
60
-
mV /
0
C
I
led
= 10mA
I
-
0.5
-
%I /
0
C
Turn-On Time
I
led
= 30 mA
T
on
-
100
-
s
C=1500pF; V
oc
to 50%
Turn-Off Time
I
led
= 30 mA
T
off
-
3.0
6.0
s
C=1500pF; V
oc
to 50%
Typical Applications
Power MOSFET Photovoltaic SPST N/O Relays With
Short Circuit Protection
NPN
1
100 Ohms
10 Mohms
5V DC
Output -
LED
PV
Output +
DIG-11-15-30-DD
6
Enh.
T.O
Cir.
Rs
2
8
Power MOSFET Photovoltaic SPST N/O AC-DC
Relays
Output
LED
PV
2
Output
Enh.
8
1
T.O
Cir.
6
5V DC
DIG-11-15-30-DD
100 Ohms
10 Mohms
Enh.
11/2001
v
Absolute Maximum Ratings (T
a
= 25
0
C)
LED Forward Current
LED Forward Current
LED Reverse Voltage
Output Discharge Current
Operating Temperature Range
Operating Temperature Range
Storage Temperature
Power Dissipation
Steady State
Peak 10% Duty Cycle
Plastic D.I.P
Side Braze D.I.P
100 mA
150 mA
10V
15mA
-40 to 85
0
C
-50 to 125
0
C
-50 to 125
0
C
100 mW
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