© Semiconductor Components Industries, LLC, 2006

August, 2006 − Rev. 4

1

Publication Order Number:

MC33341/D

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

Figure 1. Representative Block Diagram

This device contains 114 active transistors.

8

Drive Output

1

Current Sense Input A

7

2

Current

Threshold Adjust

6

Current Sense Input B/

Voltage Threshold Adjust

3

Compensation

5

Voltage Sense

Input

4

GND

Differential

Amp

Inverting/

Noninverting Amp

V

I

0.2 V

1.2 V

Reference

Voltage and Current

Transconductance

Amp/Driver

1.0

#1.0

PDIP−8

P SUFFIX

CASE 626

See detailed ordering and shipping information in the package

dimensions section on page 17 of this data sheet.

ORDERING INFORMATION

MARKING

DIAGRAMS

http://onsemi.com

SOIC−8

D SUFFIX

CASE 751

PIN CONNECTIONS

MC33341P

YYWWG

1

1

8

AWL

33341

ALYW

G

1

8

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)

18

7

6

5

2

3

4

(Top View)

Current Sense

Input A

Current Threshold

Adjust

Compensation

Drive Output

GND

Current Sense Input B/

Voltage Threshold Adjust

Voltage Sense Input