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Fast differential level shifter and boot strap driver including the same

A level shifter and driver technology, applied in the direction of output power conversion devices, instruments, logic circuits, etc., can solve the problems of increased defect rate, operation error, etc., achieve high gain, protect internal circuits, and stabilize control effects

Inactive Publication Date: 2010-07-07
DONGBU HITEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thereby, an operation error of the third transistor Q3 and the fourth transistor Q4 occurs, and in the process of mass production of chips, the defect rate may increase

Method used

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  • Fast differential level shifter and boot strap driver including the same
  • Fast differential level shifter and boot strap driver including the same
  • Fast differential level shifter and boot strap driver including the same

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Embodiment Construction

[0021] Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0022] figure 2 is a block diagram showing a bootstrap driver 200 according to an embodiment of the present invention. refer to figure 2 , the bootstrap driver 200 includes: a linear voltage regulator 210, a PWM signal generator 220, a fast differential level shifter 230, an upper driver 240, a lower driver 250, an upper switch Q1, a lower switch Q2, a capacitor C0 and a bootstrap diode SD0.

[0023] The linear regulator 210 converts the voltage of the first power supply VIN to provide a fixed internal voltage VDD. The PWM signal generator 220 outputs an independent PWM signal PS to the first power supply VIN according to the internal voltage VDD.

[0024] The fast switching level shifter 230 converts the...

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PUM

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Abstract

A boot strap driver including a fast differential level shifter are disclosed. The fast differential level shifter may include a first differential amplifier differentially amplifying a pulse width modulation signal and an inverted pulse width modulation signal and outputting a first differential amplification voltage and a second differential amplification voltage based on the amplified result. The fast differential level shifter may also include a second differential amplifier differentially amplifying the first differential amplification voltage and the second differential amplification voltage, and shifting the differential amplification voltages to voltages having an output range between a first voltage and a second voltage based on the amplified result.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2008-0136655 filed on December 30, 2008, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to semiconductor devices, and more particularly, to a fast differential level shifter and a boot strap driver including the level shifter. Background technique [0003] The bootstrap driver is one of the techniques used when the gate signal voltage of the upper switch is greater than the input supply voltage in the output buffer, which has a push-pull type inverter structure consisting of an upper switch and a lower switch. [0004] Since the bootstrap driver uses a voltage higher than the input supply voltage, a level shifter that steps up the input supply voltage to the bootstrap supply voltage is required. [0005] figure 1 is a schematic diagram showing a general bootstrap driver 100 . refer to figure 1 , The bootstrap driver 100 i...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH03K19/018528H03K19/0175H03K19/0185
Inventor 河昌佑洪升勋
Owner DONGBU HITEK CO LTD
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