MC33341 Datasheet, PDF (1/20 Pages) ON Semiconductor – POWER SUPPLY BATTERY CHARGER REGULATION CONTROL CIRCUIT

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.
• 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
Representative Block Diagram
Drive
Output
8
Current Sense Input B/ Voltage Sense
VCC
Voltage Threshold Adjust
Input
7
6
5
Order this document by MC33341/D
MC33341
POWER SUPPLY
BATTERY CHARGER
REGULATION
CONTROL CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
Differential
Amp
1.0
1.2 V
#1.0
0.2 V
Inverting/
Noninverting Amp
Voltage and Current
Transconductance
Amp/Driver
V
I
Reference
1
2
3
4
Current Sense
Current
Compensation
Gnd
Input A
Threshold Adjust
This device contains 114 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
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
Device
Operating
Temperature Range
Package
MC33341D
TA = –25° to +85°C
MC33341P
SO–8
Plastic DIP
© Motorola, Inc. 1998
Rev 1
1