IPS20 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – Precision Feedback Controllers Fixed and PTAT references

Power Management IPS20 and IPS21
IN-PLUG^® series: IPS20 and IPS21
Precision Feedback Controllers
Fixed and PTAT references
INTRODUCTION
DESCRIPTION
IN-PLUG^® IPS20 & IPS21 Integrated Circuits are
low-voltage current sensing feedback controllers used
in Switch Mode Power Supplies to control load-side
current and voltage. They have been designed to limit
the power dissipated in the sensing circuitry for high
output current applications that require current
limiting. They also provide excellent loop stability
and superb transient response. They both incorporate a
4V shunt regulator for maximum flexibility to power
the chip.
The IPS20 and IPS21 only differ by the characteristics
of the current sensing references.
The IPS20 incorporates a trimmed 54mV reference
with a positive temperature coefficient which closely
matches that of a PCB copper trace. This copper trace
sensing method can be used inexpensively with very
low associated power losses.
The IPS21 incorporates a temperature compensated
100mV reference for more conventional resistors.
Both controllers feature the same voltage regulator
section with a trimmed temperature stable voltage
reference of 1.19V. This allows the output voltage of
the SMPS to be set to any value down to about 1.2V.
The IPS20 and IPS21 are suitable for any SMPS and
any make of SMPS controllers, including flyback,
forward, PFC and DC/DC solutions.
These flyback controllers work best in complement
with the IN-PLUG^® family of IPS1x flyback
controllers, IPS10x PFC controllers and IPS20x Push-
Pull controllers.
REV5
FEATURES
• Dual precision regulators for SMPS voltage and
current control
• Output currents up to 50A
• Output voltage down to 1.2V
• 54mV or 100mV current sensing voltage
• 1.19V voltage reference
• Operates with grounded optocoupler
• 4V shunt regulator for VCC supply
APPLICATIONS
• Fast chargers for power tools and
applications
• Battery eliminators
• Industrial and bench-type power supplies
• Distributed power systems
other
PIN CONFIGURATION: DIP-8 / SOIC-8
VCC
VS
VCOMP
OPTO
1
8
IPS20
IPS21
4
5
GND
OUT (-)
IS
ICOMP
ORDERING INFORMATION
For part number, packaging, and ordering
information, please refer to the second-to-last page of
this datasheet.
© Copyright 2006-2009 - ASIC Advantage, Inc. AADS00001/AA743 - Revision 5– Dec 2008 1 / 12