High-integration control chip and power supply circuit with same

Abstract

The invention discloses a high-integration control chip and a power supply circuit with the same. The high-integration control chip comprises a switching tube, a driving module, a primary constant-voltage control module and a slope compensation module. The primary constant-voltage control module is connected with a primary side voltage feedback end of a switching power supply and the driving module, and constant-voltage control processing is carried out on feedback voltage of the primary side voltage feedback end of the switching power supply. The slope compensation module is respectively connected with the primary side voltage feedback end of the switching power supply and the primary constant voltage control module. Slope compensation processing of the output voltage is carried out according to the primary side voltage feedback value, so that the switching power supply circuit outputs a voltage value with a set slope. Therefore, the voltage and current slope requirements of battery charging and motor driving can be met. The power supply circuit adopts a primary side feedback mode, so that peripheral circuits such as feedback optocouplers can be reduced, and peripheral elements ofthe circuit are reduced.

Description

technical field [0001] The invention relates to the field of power supply technology, in particular to a highly integrated control chip and a power supply circuit with it. Background technique [0002] The integration level of existing battery chargers and chargers with motors is relatively low. In order to provide a large charging current or driving current, a secondary voltage and current feedback structure is usually used. Because the secondary side feedback structure usually requires secondary side feedback detection circuit and feedback optocoupler, the peripheral circuit is complex, there are relatively many components, the overall production efficiency of the finished power supply is low, the labor cost is high, the manufacturing cost is high, and the repair rate of the finished power supply is high. The overall cost is high. And the existing primary side feedback structure circuit. Due to the consideration of the stability of the output voltage, the output current ...

AI Technical Summary

Problems solved by technology

[0002] The integration level of the existing battery charging and chargers with motors is relatively low. In order to provide a large charging current or driving current, the secondary side voltage and current feedback structure is usually adopted.

Because the secondary side feedback structure usually requires secondary side feedback detection circuit and feedback optocoupler, the peripheral circuit is complex, there are relatively many components, the overall production efficiency of the finished power supply is low, the labor cost is high, the manufacturing cost is high, and the repair rate of the finished power supply is high. Comprehensive cost is high

While the existing primary side feedback structure circuit

Due to the consideration of the stability of the output voltage, the output current of the pulse controller is usually limited to a small current output, and the charging slope curve is generally not adjustable

Unable to meet the charging current requirements of larger rechargeable batteries or the motor drive current requirements

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