TL494 pulse width modulation chip-based single-chip microprocessor control technology charger

A single-chip microcomputer control, chip control technology, applied in the direction of current collectors, electric vehicles, electrical components, etc., can solve problems such as incompleteness, and achieve the effects of perfect functions, improved digitalization and intelligence, and good scalability

Inactive Publication Date: 2015-07-01
GUANGZHOU KINGPIN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it can only achieve some simple functions during use, and cannot complete some more complicated tasks.

Method used

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  • TL494 pulse width modulation chip-based single-chip microprocessor control technology charger
  • TL494 pulse width modulation chip-based single-chip microprocessor control technology charger

Examples

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing, describe the preferred embodiment of invention in detail:

[0018] The single-chip microcomputer control technology of the charger based on the TL494 pulse width modulation chip invented can dynamically adjust the charging constant current value and constant voltage value according to the voltage state of the battery, and realize multi-stage constant voltage constant current charging, which includes the TL494 chip control module 1. Power switch tube module 2, main output circuit module 3, output switching device module 4, MCU detection and control circuit module 5, constant voltage constant current circuit module 6 and auxiliary power supply module 7.

[0019] After the system is powered on, the alternating current AC is converted into direct current through a rectifier circuit. At the same time, the TL494 chip module 1 starts to work after being self-excited, and outputs a PWM pulse width modulation signal, which is outpu...

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Abstract

The invention provides a TL494 pulse width modulation chip-based single-chip microprocessor control technology charger. The charger comprises a TL494 chip control module 1, a power switch tube module 2, a main output circuit module 3, an output switch device module 4, an MCU (Micro Control Unit) detection and control circuit module 5, a constant voltage constant current circuit module 6 and an auxiliary power module 7. Since an analog-digital control mode is adopted, intervention and digital control are performed on a main system of the charger by the MCU detection and control module 5, various functions such as multi-section constant voltage, constant current, detection output and variable frequency output can be realized through programming, and further the digitalization and the intelligence of the charger are improved, the functions of the charger are further perfected, and good extensibility is realized.

Description

technical field [0001] The invention relates to a charger based on a TL494 pulse width modulation chip, in particular to a charger using a single-chip controller as a control device, which can automatically set different constant voltages, constant currents, automatically turn off the output, set the output frequency, and control charging according to the battery status. Smart chargers with different output states of the charger. Background technique [0002] At present, the mode of pulse width modulation chip plus power tube still occupies a large part of the switching power supply. In order to save costs, when choosing a pulse width modulation chip, people often first choose a dedicated analog integrated power chip with a cheaper price. TL494 is one of the more common ones, and has been widely used in switching power supplies, chargers and other products. However, it often can only realize some simple functions during use, and cannot complete some more complicated tasks. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/10
Inventor 徐成宪孙好庚
Owner GUANGZHOU KINGPIN IND
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