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LM2575N/a17avai1.0A Step Down Switching voltage Regulator Adjustable & Fix Output
LM2575D2T-005 |LM2575D2T005ONN/a5000avai1A, Adjustable Output Voltage, Step-Down Switching Regulator
LM2575D2T-3.3 |LM2575D2T33ONN/a5000avai1A, Adjustable Output Voltage, Step-Down Switching Regulator
LM2575T-005 |LM2575T005MOTN/a3420avai1A, Adjustable Output Voltage, Step-Down Switching Regulator
LM2575T-005 |LM2575T005ONN/a1100avai1A, Adjustable Output Voltage, Step-Down Switching Regulator
LM2575TV-ADJ |LM2575TVADJONN/a100avaiEASY SWITCHERE 1.0 A STEP-DOWN VOLTAGE REGULATOR
LM2575T-3.3 |LM2575T33SCN/a35avai3.3V dual 1.0A step down switching voltage regulator
LM2575TV-005 |LM2575TV005ONN/a45000avai1A, Adjustable Output Voltage, Step-Down Switching Regulator
MC10E452FNMCN/a7avai5V ECL 5-Bit Differential Register
MC10E452FNR2N/a158avai5V ECL 5-Bit Differential Register


LM2575TV-005 ,1A, Adjustable Output Voltage, Step-Down Switching RegulatorGeneral Descriptionsources for battery charger applications based on theToday’s most popular rechar ..
LM2575TV-015 , 1.0 A, Adjustable Output Voltage, Step−Down Switching Regulator
LM2575TV-12 ,EASY SWITCHERE 1.0 A STEP-DOWN VOLTAGE REGULATORFeaturesTV SUFFIX1• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output VersionsPLASTIC PACKAGECASE 314 ..
LM2575TV-3.3 ,1A, Adjustable Output Voltage, Step-Down Switching RegulatorFeatures• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions2• Adjustable Version Output Volt ..
LM2575TV-5 ,EASY SWITCHERE 1.0 A STEP-DOWN VOLTAGE REGULATOROrder this document by LM2575/D **  *EASY SWITCHER * 1.0 A STEP–DOWNThe LM2575 series of regul ..
LM2575TV-ADJ ,EASY SWITCHERE 1.0 A STEP-DOWN VOLTAGE REGULATORBlock Diagram and Typical ApplicationUnregulatedDC Input+VinON/OFF3.1 V InternalOutput R2ON/OFFRegu ..
LM431CIM3X/NOPB ,Adjustable Precision Zener Shunt Regulator 3-SOT-23 -40 to 85Features 3 DescriptionThe LM431 is a 3-terminal adjustable shunt regulator1• Average Temperature Co ..
LM431CIMX ,Adjustable/2.5V, 0.5% Tolerance Shunt RegulatorLM431 Adjustable Precision Zener Shunt RegulatorMarch 2002LM431Adjustable Precision Zener Shunt Reg ..
LM431CIZ ,Adjustable/2.5V, 0.5% Tolerance Shunt RegulatorFeatures Description• Programmable Output Voltage to 36 Volts The LM431A/LM431B/LM431C are three te ..
LM431SACMF ,Programmable Shunt RegulatorBlock DiagramRev. 1.0.32002 Fairchild Semiconductor CorporationLM431SA/LM431SB/LM431SCAbsolute Maxi ..
LM431SACMFX ,Adjustable/2.5V, 2% Tolerance Shunt Regulatorapplications.SOT-89 11. Ref 2. Anode 3. CathodeSOT-23F3211. Cathode 2. Ref 3. AnodeInternal
LM431SACMFX ,Adjustable/2.5V, 2% Tolerance Shunt RegulatorFeatures Description• Programmable Output Voltage to 36 Volts The LM431SA/LM431SB/LM431SC are three ..


LM2575-LM2575D2T-005-LM2575D2T-3.3-LM2575T-005-LM2575T-3.3-LM2575TV-005-LM2575TV-ADJ-MC10E452FN-MC10E452FNR2
Power Supply Battery Charger Regulation Control Circuit
-Prepared by: Ondrej Pauk
Industrial System Application Laboratory
Roznov, CZ
Figure 1. Low Cost Current Source for Battery Chargers Demonstration Board

This paper describes two designs of low cost current
sources for battery charger applications based on the
LM2575–ADJ switching step–down converter and the
MC33341 regulator control circuit.
INTRODUCTION

This design is a highly cost effective 1.0 A current source
for battery chargers with a rectangular constant–current,
constant–voltage charging characteristic. This feature
assures a basic protection against overcharge whose results
can range from minor damage to catastrophic failure of the
whole system.
This circuit was designed to implement additional charge
control based either on the microcontroller or on any other
charging control unit in the system that operates from NiCd or
NiMH batteries. The MC33341 and this board may be used in wide variety of applications. All functions needed are
performed by just two integrated circuits and a small number
of external components. This allows a very compact printed
circuit board design and a very cost effective solution.
The LM2575–ADJ Easy Switch step down converter
allows the system to operate from 8.0 to 40 Vdc, thus
allowing direct operation from both 12 and 24 V board
voltages used in the automotive industry. In comparison with
General Description

Today’s most popular rechargeable battery type is NiCd.
When overcharged, this type of battery experiences
increasing pressure inside the cell. This can cause opening
of the cell’s vent and release of oxygen. This has a
detrimental affect on the battery, although it may still retain
some useful capacity. When NiMH batteries are
overcharged, they also increase their internal pressure and
release some hydrogen, an extremely explosive gas.
The schematic diagram is shown in Figure 2. It is a 1.0 A
(maximum) “dumb” battery charger that uses the
LM2575–ADJ switching converter to step down the input dc
voltage, together with the MC33341, which regulates the
charging current flowing into the battery. The switching
regulator has high efficiency over a wide input voltage range,
which allows this design to be universal. Both 12 and 24 V car
batteries as well as cheap, poorly regulated, wall adaptors
can be used.
The term “dumb” battery charger means that it offers only
some basic protective features and the main protective and
control functions are maintained by a μP based main control
unit inside the PC or the control function of a cellular phone.
This concept allows a very compact and cost effective
design.
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