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Forum: Analog Circuits high side IGBT driver


Author: sriniketh (Guest)
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I am making a circuit with IGBT for charging a capacitor. The Driver 
which i use is a high side driver as suggested by Infineon.I have 
received working spice model of the driver from Infineon for my 
application. however the simulation in LT spice is not giving required 
output and also it is very slow. i am attaching the simulation file. 
Kindly guide me in finding the error.

Regards

Sriniketh

: Edited by Moderator
Author: Lothar Miller (lkmiller) (Moderator)
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sriniketh schrieb:
> i am attaching the simulation file.
Two things:
1. you have posted in the German forum. Post English questions in the 
embdev.net forum please.

2. for the users with tablets and phones: attach a screenshot of your 
schematic. Then they also can try to help you....

Author: sriniketh (Guest)
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Thank you for your advice. I will post in the other website

Author: sriniketh (Guest)
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I am making a circuit with IGBT for charging a capacitor. The Driver
which i use is a high side driver as suggested by Infineon.I have
received working spice model of the driver from Infineon for my
application. however the simulation in LT spice is not giving required
output and also it is very slow.I have also tried the same concept with 
power MOSFETs. i am attaching the simulation file.
Kindly guide me in finding the error.

Regards

Sriniketh

Author: Lothar Miller (lkmiller) (Moderator)
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sriniketh wrote:
> I will post in the other website
I already shifted your thread to embdev.net (see the URL line of your 
browser).

Author: sriniketh (Guest)
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I have attached the complete schematic file and the model file

Author: matzetronics (Guest)
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VS of the IR2110 is wrongly connected. Note that it should connect to 
the load output between Hi- and Lowside, according to the datasheet.
D4 is unnecessary as is R1 and R2.

Author: sriniketh (Guest)
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Now i would like to drive the circuit with negative 800VDC . I have 
doubts regarding the reference ground for the control section and the 
power section.In the control section i can use the ground of 0V. and for 
the power section i have -800VDC. Do i need to modify my circuit for my 
negative power source . kindly guide

Author: Matthias Sch. (Guest)
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No, this will blow up the Lowside MOSFet immediately, as it will see 
800V between Source and Gate. Possibly the only way to solve this is to 
reference the complete PA including the driver IC to the -800V and drive 
the circuit with optocouplers.
The next problem ist to generate the 12V-15V for the driver and charging 
pump, with about -785V.

Author: sriniketh (Guest)
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Matthias Sch. wrote:
> No, this will blow up the Lowside MOSFet immediately, as it will
> see
> 800V between Source and Gate. Possibly the only way to solve this is to
> reference the complete PA including the driver IC to the -800V and drive
> the circuit with optocouplers.
> The next problem ist to generate the 12V-15V for the driver and charging
> pump, with about -785V.

Thank you for the information.

I have tried the bootstrap example for high side driving. Can i connect 
the load to the collector side and drive it as low side driver ?. Is it 
possible ?.Can you suggest sample circuit for solving such a condition

Is just the bootstrap capacitor is not enough to drive the gate? Do i 
also need charge pump circuit ?

Thanks in Advance

Sriniketh

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