Controller IC

A controller and logic control technology, applied in the direction of logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, etc., can solve the problems of rising cost of pin packaging and achieve the goal of reducing packaging cost and increasing capacity Effect

Pending Publication Date: 2018-01-16
SHENZHEN NANYUN MICROELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of pins will increase the cost of packaging, and under the consideration of cost, how to make the same pin have two or more functions has become an important issue in today's integrated circuit design

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 2 As shown, it is the schematic circuit diagram of the first embodiment of the present invention, a circuit with a BOS pin having an over-temperature protection function, including the RI terminal of the controller, the BOS terminal of the controller, the VDD terminal of the controller, and the VDD terminal of the controller. GATE terminal, low-voltage power supply generation, internal drive power supply, reference voltage, reference current, N-channel MOS transistor NM1, N-channel MOS transistor NM2, driver 1, driver 2, oscillator, voltage comparator CMP, logic control, The RI port is externally connected to a resistor Rf, and the BOS port is externally connected to a thermistor NTC.

[0040] The low-voltage power supply is generated, its input terminal is connected to the VDD terminal of the controller, and its output terminal is connected to the input terminal of the reference voltage, which is used as the internal low-voltage power supply VCC;

[0041...

Embodiment 2

[0055] Such as image 3 As shown, compared with Embodiment 1, the difference is that the BOS end of the controller is externally connected to the same-named end of the primary side of an air-core transformer, the different-named end of the primary side of the air-core transformer is connected to the VDD port of the controller, and the secondary side of the air-core transformer has the same name The terminal is connected to one input terminal of the resistor RES, and is used as a synchronous rectification pulse transmission signal Vpulse, and is connected to the pulse port of the synchronous rectification control IC at the same time; the other input terminal of the resistor RES is connected to the secondary terminal of the hollow transformer with the same name, and ground.

[0056] The basic working principle of this embodiment:

[0057] Such as image 3 As shown, the BOS pin is externally connected to the same-named terminal of the primary side of the air-core transformer, a...

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PUM

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Abstract

The invention provides a controller IC. The controller IC comprises the RI end of a controller, the BOS end of the controller, the VDD end of the controller and the GATE end of the controller; the VDDend is connected to external voltage, and used for supplying power to the internal circuit of the controller IC; the GATE end is the output end of the controller IC, and used for controlling on and off of the external circuit of the controller IC; the controller IC is characterized in that the BOS end can be connected to different devices outside, so that the controller IC respectively has an over-temperature protection function and a synchronous rectification signal pulse transmission function; in combination with the different devices connected on the periphery, function switching is realized through the same pin; selection of different clients on function requirements can be satisfied; and thus, on the premise that the encapsulation cost is constant, the capability of the IC is improved.

Description

technical field [0001] The invention relates to a controller IC, in particular to a controller IC for a switching power converter. Background technique [0002] Switching power converters are usually controlled by a controller IC, and the current power converter industry is under tremendous pressure for high-efficiency power converters and low-cost controller ICs. Since the manufacturing cost of an IC greatly depends on die size, pin count, packaging, and IC testing, reducing the pin count of an IC becomes a common way to reduce the cost of a controller IC by comparison. However, reducing the number of pins in conventional power converter controller ICs is also difficult. [0003] In conventional power converter controller ICs, each pin of the IC is associated with a single, independent parameter or function, and therefore, the IC requires as many pins as the number of parameters or functions supported by the IC. Thus, in general, reducing the number of pins in a power con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0185
CPCH03K19/0185
Inventor 赵志伟唐盛斌
Owner SHENZHEN NANYUN MICROELECTRONICS CO LTD
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