LIA135 Datasheet, PDF (1/13 Pages) IXYS Corporation – Low Voltage Optically Isolated Error Amplifiers

INTEGRATED CIRCUITS DIVISION
LIA135 / LIA136
Low Voltage Optically Isolated
Error Amplifiers
Features
• Low Input Voltage of 1.6V over temperature
• Precision reference, error amplifier, and optocoupler
in a single package
• Voltage Reference: 1.299V ±0.5% @ 25°C
LIA135: ±1% @ -40°C to +85°C
LIA136: ±1.5% @ -40°C to +110°C
• LIA136: Reduced dark current at high temperature
• Common Mode Transient Immunity:
LIA135: 5V/ns
LIA136: 20V/ns
• Simplified frequency compensation
• CTR 500% to 2000%
• Lowest optical offset current (I_CE vs. V_LED)
Applications
• Low Voltage Power Supply Feedback
• Isolated Power Supply Feedback
• AC-to DC Power Supplies
• DC-to-DC Converters
Description
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).
These devices are available in DIP and surface mount
(SMT) packages.
Approvals
• UL Recognized Component: File # E76270
• CSA Certified Component: Certificate # 1305490
Ordering Information
Part
LIA135
LIA135S
LIA135STR
LIA136
LIA136S
LIA136STR
Description
8-pin DIP, Tube (50/Tube)
8-pin Surface Mount, Tube (50/Tube)
8-pin Surface Mount, Tape & Reel (1000/Reel)
8-pin DIP, Tube (50/Tube)
8-pin Surface Mount, Tube (50/Tube)
8-pin Surface Mount, Tape & Reel (1000/Reel)
LIA135 and LIA136 Block Diagrams
LED
C
LED
C
E
E
COMP
COMP
B
FB
FB
GND
LIA135
GND
LIA136
DS-LIA135 / LIA136-R01
www.ixysic.com
1