Switching Battery Charger with L296

Advertise in delabs

This is a a circuit from my  Power Supplies Section.  There may be some documentation errors in my circuits. If you are used to building and troubleshooting circuits then it is ok.

This circuit is derived from an application note of L296, It is a Power Switching Regulator from ST Micro. U1A is wired as a differential amplifier and U1B a High Gain Comparator. C4 and C5 are parallel for lower ESR. Equivalent series resistanc Fast switching diode used is BYW80.

Switching Battery Charger with L296

L296 is a switch mode power controller here. In this NTE327 or 2N5038 is used to boost the current output. This transistor is both high current and fast switching. U1A, LM358 measures the load current by reading the voltage across shunt R6 and compared to a current limit setting at R14 using U1B to give a load current control. R7-R8 give a voltage feedback for voltage limit.

Use MFR 1% for all Resistors, 33E means 33 ohms, 22K means 22 kilo ohms, 1M is 1 megohm. 10T tp means ten turn trimpot. “Analog Ground” and “Digital Ground” must be linked at power supply only, avoid loops, let grounds radiate from a ground plane. Unused inputs of logic and opamps pull up or down to avoid oscillations and noise

More delabs Schematic Diagrams

  • Analog mV Switch for Digital MetersAnalog mV Switch for Digital Meters
    Let us assume you have to Measure Amps and Volts in four independent circuits. This becomes a Multi Channel Voltmeter and Ammeter. This circuit uses [...]
  • Telephone status indicator with LEDTelephone status indicator with LED
    This will monitor telephone status without loading the telephone line, this way if you have two phones in parallel you will know if one of [...]
  • Differential to TTL convertor using LM339Differential to TTL convertor using LM339
    Some outputs are via Dual Differential Line Driver type DS8830. This device will interface with standard TTL systems. The differential outputs are balanced and are [...]
  • Relay Driver – ElectromagneticRelay Driver – Electromagnetic
    This circuit is a standard way of driving Small Power Relays from Control Signals generated by Logic or Opamp Circuits. C2 and R5 form a [...]
  • Interface ICL7135 Voltmeter to Atmel 89C52Interface ICL7135 Voltmeter to Atmel 89C52
    This circuit is a Parallel interface between 89C52 of Atmel with 7135 of Intersil.  With This circuit you can read analog data of both polarities. [...]
  • Ohmmeter – Simple Resistance MeasurementOhmmeter – Simple Resistance Measurement
    Measurement of resistor values in circuit configurations are required to be made often, as these might have changed in value due to various tolerance ranges, [...]
  • Astable Multivibrator with 555 TimerAstable Multivibrator with 555 Timer
    This is a demo of the popular 555 timer. you can try out the project on this page by a javascript simulation. Press the Red [...]
  • Ammeter and Precision RectifierAmmeter and Precision Rectifier
    Studying current measurement is a prerequisite for many of the measuring techniques. The current parameter mainly specifies the power consumption in a circuit, given the [...]
About delabs 152 Articles
Product Design - Industrial Automation and Instrumentation. -