MC33341_06 Datasheet, PDF (1/19 Pages) ON Semiconductor – Power Supply Battery Charger Regulation Control Circuit

MC33341
Power Supply Battery
Charger Regulation
Control Circuit
The MC33341 is a monolithic regulation control circuit that is
specifically designed to close the voltage and current feedback loops in
power supply and battery charger applications. This device features the
unique ability to perform source high−side, load high−side, source
low−side and load low−side current sensing, each with either an
internally fixed or externally adjustable threshold. The various current
sensing modes are accomplished by a means of selectively using the
internal differential amplifier, inverting amplifier, or a direct input path.
Positive voltage sensing is performed by an internal voltage amplifier.
The voltage amplifier threshold is internally fixed and can be externally
adjusted in all low−side current sensing applications. An active high
drive output is provided to directly interface with economical
optoisolators for isolated output power systems. This device is available
in 8−lead dual−in−line and surface mount packages.
Features
• Differential Amplifier for High−Side Source and Load Current Sensing
• Inverting Amplifier for Source Return Low−Side Current Sensing
• Non−Inverting Input Path for Load Low−Side Current Sensing
• Fixed or Adjustable Current Threshold in All Current Sensing Modes
• Positive Voltage Sensing in All Current Sensing Modes
• Fixed Voltage Threshold in All Current Sensing Modes
• Adjustable Voltage Threshold in All Low−Side Current Sensing Modes
• Output Driver Directly Interfaces with Economical Optoisolators
• Operating Voltage Range of 2.3 V to 16 V
• Pb−Free Packages are Available
Drive Output
Current Sense Input B/ Voltage Sense
V_CC
Voltage Threshold Adjust Input
8
7
6
5
Differential
Amp
1.0
1.2 V
#1.0
0.2 V
Inverting/
Noninverting Amp
Voltage and Current
Transconductance
Amp/Driver
V
I
Reference
http://onsemi.com
MARKING
DIAGRAMS
8
SOIC−8
33341
D SUFFIX
ALYW
1
CASE 751
G
1
8
PDIP−8
P SUFFIX
CASE 626
MC33341P
AWL
YYWWG
1
1
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
Current Sense
Input A
1
Current Threshold
Adjust
2
Compensation 3
GND 4
8 Drive Output
7 VCC
6
Current Sense Input B/
Voltage Threshold Adjust
5 Voltage Sense Input
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 17 of this data sheet.
1
2
3
4
Current Sense Input A
Current
Compensation
GND
Threshold Adjust
This device contains 114 active transistors.
Figure 1. Representative Block Diagram
© Semiconductor Components Industries, LLC, 2006
1
August, 2006 − Rev. 4
Publication Order Number:
MC33341/D