Datasheet > AN-7508

AN-7508

更新时间： 2024-11-29 22:05:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		转换器双极性晶体管
页数	文件大小	规格书
2页	81K
描述
HVIC/IGBT Half-Bridge Converter Evaluation Circuit

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AN-7508 数据手册

HVIC/IGBT Half-Bridge Converter

Evaluation Circuit

Application Note

May 1992

AN-7508

Author: George Danz

The HVIC high voltage integrated circuit is designed to drive

n-channel IGBTs or MOSFETs in a half-bridge configuration

inductance will cause the switching waveforms to simulate

the conditions which would normally be observed with motor

or transformer loads, while limiting the current carried by the

lower rated flyback diodes in this circuit.

Title

N75

)

ub-

VIC

GBT

alf-

idge

on-

rter

valu-

up to 500V . Power supply and motor control inverters can

be configured for voltages up to 230V

using the HVIC,

IGBTs and a few other components.

The values for R

, R , etc., have been chosen to result

PUa PUb

A few precautions should be taken in using the circuit. Lead

lengths between the external power circuit (including gate

in overcurrent trip at approximately 25Apk. At this level of

current, heat sinking for the IGTs and flyback diodes is

required. The series resistance of the upper and lower pilot

resistor dividers would be approximately 1KΩ; the divider

ratio should cause 0.1V at the tap at the desired trip current.

and pilot leads), the 15V bypass capacitor (C ), the boot-

strap diode (D ) and capacitor (C ) and the HVIC should be

minimized.

The basic components required to evaluate the features of

the SP601 are shown in the simplified schematic. The rec-

ommended load is largely resistive so that the largest current

component will flow through the IGBTs, IGT1 and IGT2.

When first energizing your evaluation circuit, begin with a

reduced bus voltage of about 20V

to 30V to verify

proper circuit operation before proceeding to higher voltages.

More specific information can be found in File Number 2428

The flyback diodes, D1 and D2, rated 8A, will carry a much

smaller flyback current component. A small amount of load

and File Number 2429 Half-Bridge 500V

Driver data

sheets and in the Application Note, AN-8829.1.

it)

utho

)

Simplified Schematic

≤ V

3 500V

LINK DC

VDC

ey-

ords

IGT1

re-

or ()

0.22

D1U

G1U

50Ω

PBa

100Ω

BIAS

G2U

PULSE

GEN

+15V

15V

LINK

PHASE

PUb

ark

OUT

UP/DOWN

FAULT

20Ω

3KW

TRIPU

CL2

IGT2

1mH

age-

ode

se-

ut-

FAULT

LED

D1L

50Ω

HVIC

G1L

+15V

100Ω

G2L

PLa

ENABLE

CL1

LINK

TRIPL

PLb

OC-

≤ 10µF

ark

HVIC - Fairchild Part # SP601 (Formerly

GS601)

D1, 2 - Fairchild Part #

RUR860

, R

PUa PLa

- 910Ω, 1.8W

- 68Ω, 1.8W

C1 - 0.1µF, 600V

IGT1, 2 - Fairchild Part # HGTA24N60D1C

- Fairchild Part # A114M

, R

PUb PLb

R - 20Ω, 3KW 13 -50

Application Note Rev. A1

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