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Optically Isolated Error Amplifiers  
  • Low Input Voltage of 1.6V over temperature (LIA135 & LIA136)
  • Precision reference, error amplifier, and optocoupler in a single package
  • Voltage Reference: 1.299V ±0.5% @ 25°C (LIA135 & LIA136)
  • LIA136: Reduced dark current at high temperature
  • Simplified frequency compensation
  • CTR 500% to 2000% (LIA135 & LIA136)
  • Lowest optical offset current (ICE vs. VLED)
The LIA135 and LIA136 are low voltage optically isolated error amplifiers with a precision programmable shunt reference combined into a single package capable of operating down to 1.6V. The optocoupler portion of the LIA135 / LIA136 comprises an infrared LED that is optically coupled to an NPN phototransistor providing a current transfer ratio from 500% to 2000%. Ensuring low voltage performance, the input voltage range of 1.6V to 10V is guaranteed over the operational temperature range. The combination of features in the LIA135 / LIA136 are optimal for use in isolated AC-to-DC power supplies and DC-to-DC converters. The bias current for the shunt regulator does not pass through the LED, which eliminates bias-related optical current, giving the user the industry’s largest dynamic range (1000:1).
 

Part
Number

Data Sheet Voltage Reference Common Mode Transient Immunity

Isolation Voltage

Package
LIA135 Rev 1 +/- 1 %
@ -40C to +85C
5V/ns 3750VRMS 8-Pin DIP, SMT
LIA136 Rev 1 +/- 1.5 %
@ -40C to +110C
20V/ns 3750VRMS 8-Pin DIP, SMT
LIA120 Rev 4 1.240V +/- 1 % See data sheet 3750VRMS 8-Pin SMT
LIA130 Rev D 1.240V +/- 1 % See data sheet 3750VRMS 8-Pin DIP, SMT
Linear Error Amps picture
Linear Optocouplers  
  • 0.01% Servo Linearity
  • THD -87dB Typical
  • Wide Bandwidth (>200kHz)
  • Couple Analog and Digital Signals
  • High Gain Stability
  • Low Input-to-Output Capacitance
  • Low Power Consumption
  • VDE Compatible
  • Flatpack Package (PCMCIA Compatible)
  • Surface Mount and Tape & Reel Versions Available

IXYS IC Division linear optocouplers features an infrared LED optically coupled with two photodiodes. One feedback (input) photodiode is used to generate a control signal that provides a servomechanism to the LED drive current, thus compensating for the LED's nonlinear time and temperature characteristics. The other (output) photodiode provides an output signal that is linear with respect to the servo LED current. The devices feature wide bandwidth, high input to output isolation, and excellent servo linearity.

 

Part
Number

Data Sheet Revision K1 Servo Gain K2 Forward Gain K3 Transfer Gain Input Control Current
(mA)

Isolation Voltage

(VRMS)

Package
LOC110 11 0.004/0.03 0.004/0.03 0.668/1.179 2 3750 8-Pin DIP,
SOIC
LOC111 9 0.008/0.03 0.006/0.03 0.733/1.072 2 3750 8-Pin DIP,
SOIC
LOC112 7 0.004/0.03 0.004/0.03 0.733/1.072 2 3750 8-Pin DIP,
SOIC
LOC117 5 0.008/0.03 0.006/0.03 0.887/1.072 2 3750 8-Pin DIP,
SOIC
LOC210P 7 0.004/0.03 0.004/0.03 0.733/1.072 2 3750 16-Pin SOIC
LOC211P 7 0.008/0.03 0.006/0.03 0.733/1.072 2 3750 16-Pin SOIC
 
Application Notes:

Click here for Reliability Reports for these devices

 

 
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