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DS-LIA130-R00D 1
LIA130
Optically Isolated Error Amplifier
e3
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Part # Description
LIA130 8 Pin DIP (50/Tube)
LIA130S 8-Pin Surface Mount (50/Tube)
LIA130STR 8-Pin Surface Mount (1000/Reel)
Applications
Features Description
Ordering Information
Block Diagram
• Power System for Workstations
• Telecom Central Office Supply
• Telecom Bricks
• Optocoupler, Precision Reference, and Error
Amplifier in a Single Package
• 1.240V ± 1% Reference (@ 25ºC)
• Linear Optical Coupler Technology with an Industry
Standard 431-type
• CTR 300% to 600% Linearity
• 3750Vrms Isolation
1
2
3
4 5
6
7
8LED
FB
COMP
GND
NC
C
E
NC
Approvals
• UL Recognized Component: File # E76270
• CSA Certified Component: Certificate # 1305490
The LIA130 is an optically isolated amplifier with a
431-type precision programmable shunt reference
combined in the same package. The optocoupler
portion of the LIA130 comprises a Gallium Arsenide
(GaAs) light-emitting diode (LED) optically coupled to
a silicon phototransistor. The current transfer ratio of
the device is between 300% and 600%.
The combination of features in the LIA130 is optimal
for use in isolated AC-to-DC power supplies and
DC-to-DC converters. It replaces several discrete
components, saves valuable circuit board space, and
reduces complexity.
The device is available in DIP and surface-mount
packages.
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2R00D
LIA130
Absolute Maximum Ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to the
device. Functional operation of the device at conditions beyond
those indicated in the operational sections of this data sheet is
not implied.
Parameter Conditions Symbol Min Typ Max Units
Input Characteristics @ 25°C
LED forward voltage ILED = 5 mA, VCOMP = VFB (Fig.1) VF0.9 - 1.4 V
Reference voltage VCOMP = VFB, ILED = 10 mA, -40 to +85°C (Fig.1) VREF
1.224 1.24 1.259 V
VCOMP = VFB, ILED = 10 mA, 25°C (Fig.1) 1.228 1.24 1.252
Deviation of VREF over temperature 1T
A = -40 to +85°C VREF (DEV) - 77 TBD mV
Ratio of VREF variation to the output of the error amplifier ILED = 10 mA, VCOMP = VREF to 10 V (Fig.2) VREF/
VCOMP
- 0.002 TBD mV/V
Feedback input current ILED = 10 mA, R1 = 10 k (Fig.3) IREF - 0.09 TBD A
Deviation of IREF over temperature 1T
A = -40 to +85°C IREF (DEV) - 0.028 TBD A
Minimum drive current VCOMP = VFB (Fig.1) ILED (MIN) -4580A
Off-state error amplifier current VLED = 6 V, VFB = 0 (Fig.4) I (OFF) - 0.001 0.1 A
Error amplifier output impedance 2VCOMP = VFB, ILED = 0.1 mA to 15 mA, f<1 kHZ IZOUTI - 0.22 -
Output Characteristics @ 25°C
Collector dark current VCE = 10V (Fig. 5) ICEO - 0.3 50 nA
Collector-emitter voltage breakdown IC = 1.0mA BVCEO 70 - - V
Emitter-collector voltage breakdown IE = 100 µA BVECO 7- - V
1. The deviation parameters VREF(DEV) and IREF(DEV) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-
range temperature coefficient of the reference input voltage, VREF
, is defined as:
|VREF| (ppm/°C) = {VREF (DEV)/VREF (TA 25°C)} X 106 / TA
where TA is the rated operating free-air temperature range of the device.
2. The dynamic impedance is defined as |ZOUT| = VCOMP/ILED. When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:
|ZOUT, TOT| = V/I |ZOUT| X [1 + R1/R2]
Electrical Characteristics
Parameter Symbol Ratings Units
Collector-Emitter Voltage VCEO 20 V
Emitter-Collector Voltage VECO 7V
Input Voltage VLED 10 V
Input DC Current ILED 20 mA
Collector Current IC50 mA
Input Power Dissipation 1PD145 mW
Transistor Power Dissipation 2PD85 mW
Total Power Dissipation 3PD145 mW
Storage Temperature TSTG -55 to +125 °C
Operating Temperature TOPR -40 to +85 °C
Absolute Maximum Ratings (@ 25˚ C)
1 Derate linearly from 25°C at a rate of 2.42 mW/ °C.
2 Derate linearly from 25°C at a rate of 1.42 mW/ °C.
3 Derate linearly from 25°C at a rate of 2.42 mW/ °C.
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Parameter Conditions Symbol Min Typ Max Units
Transfer Characteristics @ 25°C
Current transfer ratio ILED = 5 mA, VCOMP = VFB, VCE = 5 V (Fig. 6) CTR 300 500 600 %
Collector-emitter saturation voltage ILED = 10 mA, VCOMP = VFB, IC = 2.5 mA (Fig. 6) VCE (SAT) - 0.099 0.5 V
Isolation Characteristics @ 25°C
Input-output insulation leakage current 1RH = 45%, T
A = 25°C, t = 5s, VI-O = 3000 VDC II-O - - 1.0 A
Withstand insulation voltage 1RH <= 50%, T
A = 25°C, t = 1 min VISO 2500 - - Vrms
Resistance (input to output) 1VI-O = 500 VDC RI-O -10
12 -
Switching Characteristics @ 25°C
Bandwidth (Fig. 7) BW- 10 - kHZ
Common mode transient immunity at output high 2ILED = 0 mA, Vcm = 10 VPP RL = 2.2 k (Fig. 8) |CMH| - TBD - kV/s
Common mode transient immunity at output low 2ILED = 10 mA, Vcm = 10 VPP RL = 2.2 k (Fig. 8) |CML| - TBD - kV/s
1. Device is considered as a two terminal device: Pins 1, 2, 3 and 4 are shorted together and Pins 5, 6, 7 and 8 are shorted together.
2. Common mode transient immunity at output high is the maximum tolerable (positive) dVcm/dt on the leading edge of the common mode impulse signal, Vcm, to assure that the output will
remain high. Common mode transient immunity at output low is the maximum tolerable (negative) dVcm/dt on the trailing edge of the common pulse signal,Vcm, to assure that the output will
remain low.
Electrical Characteristics
R1
R2
PWM
Control
LIA130
VIN VOUT
1
2
3
4 5
6
7
8
Example Application for the LIA130
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2
3
8
6
7
5
ILED
IREF
+
2
3
8
6
7
5
IOFF
+
VLED
2
3
8
6
7
5
+
VCE
ICEO 2
3
8
6
7
5
ILED IC
+
+
VREF
VCE
VCOMP
2
3
8
6
7
5
+
VF
VREF
ILED
IOFF Test Circuit
CTR, VCE-sat Test Circuit
ΔVREF / ΔVCOMP Test Circuit
IREF Test Circuit
ICEO Test Circuit
VREF, VF, ILED-min Test Circuit
2
3
8
6
7
5
ILED
+
VCOMP
VREF
Test Circuits
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AB
VCC = +5VDC
VCC = +5VDC
IF = 10 mA
IF = 0 mA (A)
IF = 10 mA (B)
VIN
0.47V
0.1 VPP
47Ω
VOUT
VOUT
VCM
10VP-P
R1
2.2kΩ
RL
1μf
+
_
Frequency Response
CMH and CML
1
2
3
4 5
6
7
8
1
2
3
4 5
6
7
8
Test Circuits (cont.)
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LIA130
*The Performance data shown in the graphs above is typical of device performance. For guaranteed parameters not indicated in the written specifi cations, please
contact our application department.
PERFORMANCE DATA*
LED Current vs. Cathode Voltage
(TA=25ºC, VCOMP=VFB)
VCOMP - Cathode Voltage (V)
ILED - Supply Current (mA)
-1.0
15
10
5
0
-5
-10
-15 -0.5 0.0 0.5 1.0 1.5
LED Current vs. Cathode Voltage
(TA=25ºC, VCOMP=VFB)
VCOMP - Cathode Voltage (V)
ILED - Supply Current (µA)
-1.0
150
120
90
60
30
0
-30
-60
-90
-120
-150
-0.5 0.0 0.5 1.0 1.5
Reference Voltage vs.
Ambient Temperature
VREF - Reference Voltage (V)
-40
1.40
1.37
1.34
1.31
1.28
-20 0 20406080
ILED=10mA
Temperature (ºC)
Reference Current
vs. Ambient Temperature
(ILED=10mA, R1=10K:)
IREF - Reference Current (mA)
-40
110
100
90
80
70
60
50 -20 0 20406080100
Temperature (ºC)
Off Current vs. Ambient Temperature
(VLED=13.2V, VFB=0V)
I(OFF) - Off Current (nA)
-40
0.5
0.4
0.3
0.2
0.1
0
-20 0 20406080100
Temperature (ºC)
LED Forward Current
vs. Forward Voltage
ILED - Forward Current (mA)
VF - Forward-Voltage (V)
0.8
20
15
10
5
0
0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
85ºC
55ºC
25ºC
-5ºC
Dark Current vs. Temperature
(VCE=10V)
ICEO - Dark Current (nA)
-40
50
40
30
20
10
0
-10 -20 0 20 40 60 80 100
Temperature (ºC)
Collector Current
vs. Ambient Temperature
(VCE=5V)
IC - Collector Current (mA)
ILED=20mA
-40
120
100
80
60
40
20
0-20 0 20 40 60 80 100
Temperature (ºC)
ILED=1mA
ILED=5mA
ILED=10mA
Current Transfer Ratio
vs LED Current
(VCE=5V)
(IC/IF) - Current Transfer Ratio (%)
ILED - Forward Current (mA)
0
700
600
500
400
300
200
100
0
5 10152025
-5ºC
25ºC
55ºC
85ºC
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*The Performance data shown in the graphs above is typical of device performance. For guaranteed parameters not indicated in the written specifi cations, please
contact our application department.
PERFORMANCE DATA*
Saturation Voltage
vs. Ambient Temperature
(ILED=10mA; IC=10mA)
VCE (sat) - Saturation Voltage (V)
-40
0.30
0.25
0.20
0.15
0.10
0.05
0.00 -20 0 20406080100
Temperature (ºC)
Collector Current
vs. Collector Voltage
(TA=25ºC)
IC - Collector Current (mA)
VCE - Collector-Emitter (V)
0
180
160
140
120
100
80
60
40
20
012345678910
ILED=20mA
ILED=1mA
ILED=5mA
ILED=10mA
Delta VREF / Delta VCOMP
vs. Ambient Temperature
VCE (sat) - Saturation Voltage (V)
-40
-1.5
-2.0
-2.5
-3.0
-20 0 20406080100
Temperature (ºC)
Voltage Gain vs. Frequency
Voltage Gain, A(Vo/Vin) dB
Frenquency kHz
10
15
0
-15
-30
100 1000
100:
1k:
500:
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LIA130
The LIA130
The LIA130 is essentially an optically isolated
error amplifier. It comprises three of the necessary
components to form an isolated power supply: an
optocoupler, an error amplifier, and a reference
voltage device. The LIA130 is the functional equivalent
of a 431 series shunt voltage regulator plus an
optocoupler in the same package.
LED Pin
FB Pin
COMP Pin
GND Pin
Connect the GND pin of the LIA130 to the secondary
ground of the converter.
NC Pins
The NC (not connected) pins have no internal
connection and must not have any connection to
the secondary side, as this might compromise the
primary-to-secondary isolation.
C & E Pins
The LED within the LIA130 is powered by a sample of
the output voltage that is being regulated. Typically, a
resistor divider is provided to keep this voltage sample
within the operating range of the LED and its series
resistor. As the output voltage changes, the LED light
output changes, which provides a changing error
voltage from the phototransistor output of the LIA130.
The sampled voltage must be at least 1.24V (the
reference voltage) plus 1.5V (the LED voltage drop)
or a minimum of 2.74 volts. The sampled voltage can
also be provided from a slaved secondary winding of
the transformer rather than a resistor divider.
There must be a current-limiting resistor in series with
the LED pin to keep the current flow through the LED
within its operating range for all expected sampled
output levels. This resistor must be selected along with
the resistor in series with the output phototransistor.
The LIA130, when connected as shown in the Typical
Application Circuit, will regulate the output voltage so
that the voltage on its FB pin is 1.24V. Set the values
of the two voltage divider resistors, R1 and R2 in this
way:
R1/R2 = (VOUT / VREF) - 1
The value of R1 is set by the input offset current,
0.8A. 1% accuracy is obtained when the value of R1
satisfies this formula:
((VOUT - 1.24) / R1) > 80µA
The frequency response of the converter can be
optimized for the particular application by placing a
compensation network between the COMP pin and
the FB pin of the LIA130. In a system with a typical
low-bandwidth requirement, only a 0.1µF capacitor
might be needed.
If the system has more critical bandwidth
requirements, then measurements must be made of
the system's loop. See “Practical Design of Power
Supplies” by Ron Lenk, IEEE Press, 1998, for an
excellent description.
The output phototransistor of the LIA130 provides the
isolated and amplified error signal that represents the
DC output level of the converter. Typically, the collector
of the phototransistor will be pulled up to voltage and
the emitter will be grounded.
The value of the collector's pull-up resistor and the
value of the LED current-limiting resistor must be
determined together with respect to the input voltage
range of the PWM circuitry. The variation in CTR of
the LIA130 must also be taken into account.
As an example, consider first that the minimum CTR
of the LIA130 is 300%. If the current-limiting resistor
of the LED is set to allow a maximum current through
the LED of 1mA when the converter output is at a
nominal 15 volts:
R
LED = (15V - 2.74V) / 0.001A = 12.260k
then a minimum of 3mA will flow through the collector
pull-up resistor. If the collector is pulled up to 12V and
the PWM has an internal reference voltage of 5V, then
the minimum resistor value is:
R
PULLUP > (12V - 5V) / 0.003A > 2.333k
[Standard values can be selected for RLED and
RPULLUP and the small differences then re-calculated.]
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Manufacturing Information
Moisture Sensitivity
All plastic encapsulated semiconductor packages are susceptible to moisture ingression. IXYS Integrated
Circuits Division classified all of its plastic encapsulated devices for moisture sensitivity according to
the latest version of the joint industry standard, IPC/JEDEC J-STD-020, in force at the time of product
evaluation. We test all of our products to the maximum conditions set forth in the standard, and guarantee proper
operation of our devices when handled according to the limitations and information in that standard as well as to any
limitations set forth in the information or standards referenced below.
Failure to adhere to the warnings or limitations as established by the listed specifications could result in reduced
product performance, reduction of operable life, and/or reduction of overall reliability.
This product carries a Moisture Sensitivity Level (MSL) rating as shown below, and should be handled according
to the requirements of the latest version of the joint industry standard IPC/JEDEC J-STD-033.
Device Moisture Sensitivity Level (MSL) Rating
LIA130 / LIA130S MSL 1
ESD Sensitivity
This product is ESD Sensitive, and should be handled according to the industry standard JESD-625.
Reflow Profile
This product has a maximum body temperature and time rating as shown below. All other guidelines of J-STD-020
must be observed.
Device Maximum Temperature x Time
LIA130 / LIA130S 250ºC for 30 seconds
Board Wash
IXYS Integrated Circuits Division recommends the use of no-clean flux formulations. However, board washing to
remove flux residue is acceptable, and the use of a short drying bake may be necessary. Chlorine-based or
Fluorine-based solvents or fluxes should not be used. Cleaning methods that employ ultrasonic energy should not be
used.
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10 R00D
LIA130
Dimensions
mm
(inches)
PCB Hole Pattern
2.540 ± 0.127
(0.100 ± 0.005)
6.350 ± 0.127
(0.250 ± 0.005)
9.144 ± 0.508
(0.360 ± 0.020)
0.457 ± 0.076
(0.018 ± 0.003)
9.652 ± 0.381
(0.380 ± 0.015)
7.239 TYP.
(0.285)
7.620 ± 0.254
(0.300 ± 0.010)
4.064 TYP
(0.160)
0.813 ± 0.102
(0.032 ± 0.004)
8-0.800 DIA.
(8-0.031 DIA.) 2.540 ± 0.127
(0.100 ± 0.005)
7.620 ± 0.127
(0.300 ± 0.005)
7.620 ± 0.127
(0.300 ± 0.005)
6.350 ± 0.127
(0.250 ± 0.005)
3.302 ± 0.051
(0.130 ± 0.002)
Pin 1
0.254 ± 0.0127
(0.010 ± 0.0005)
Dimensions
mm
(inches)
PCB Land Pattern
2.540 ± 0.127
(0.100 ± 0.005)
9.652 ± 0.381
(0.380 ± 0.015)
6.350 ± 0.127
(0.250 ± 0.005)
9.525 ± 0.254
(0.375 ± 0.010)
0.457 ± 0.076
(0.018 ± 0.003)
0.813 ± 0.102
(0.032 ± 0.004)
4.445 ± 0.127
(0.175 ± 0.005)
7.620 ± 0.254
(0.300 ± 0.010)
0.635 ± 0.127
(0.025 ± 0.005)
0.254 ± 0.0127
(0.010 ± 0.0005)
2.54
(0.10)
8.90
(0.3503)
1.65
(0.0649)
0.65
(0.0255)
3.302 ± 0.051
(0.130 ± 0.002)
Pin 1
MECHANICAL DIMENSIONS
LIA130
LIA130S
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For additional information please visit our website at: www.ixysic.com
11 PRELIMINARY
LIA130
IXYS Integrated Circuits Division makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make
changes to specifications and product descriptions at any time without notice. Neither circuit patent licenses nor indemnity are expressed or implied. Except as set forth in IXYS Integrated
Circuits Division’s Standard Terms and Conditions of Sale, IXYS Integrated Circuits Division assumes no liability whatsoever, and disclaims any express or implied warranty, relating to
its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right.
The products described in this document are not designed, intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other
applications intended to support or sustain life, or where malfunction of IXYS Integrated Circuits Division’s product may result in direct physical harm, injury, or death to a person or severe
property or environmental damage. IXYS Integrated Circuits Division reserves the right to discontinue or make changes to its products at any time without notice.
Specification: DS-LIA130-R00D
©Copyright 2012, IXYS Integrated Circuits Division
All rights reserved. Printed in USA.
12/22/2012
Dimensions
mm
(inches)
User Direction of Feed
NOTES:
1. Dimensions carry tolerances of EIA Standard 481-2
2. Tape complies with all “Notes” for constant dimensions listed on page 5 of EIA-481-2
Embossment
Embossed Carrier
Top Cover
Tape Thickness
0.102 MAX.
(0.004 MAX.)
330.2 DIA.
(13.00 DIA.)
K1
=4.20
(0.165)
0
K =4.90
(0.193)
P=12.00
(0.472)
W=16.00
(0.63)
Bo=10.30
(0.406)
Ao=10.30
(0.406)
LIA130STR Tape & Reel
