DRV8876-Q1: Simulation error

reshma b

Part Number: DRV8876-Q1
Other Parts Discussed in Thread: DRV8876, , DRV8872

I was trying to do simulation for DRV8876 in LTspice giving inputs at IN1 and IN2.Whatever the input condition is I am only getting high on OUT1 and OUT2 pins. I have tried the following conditions

1) IN1 High and IN2 Low

2)IN1 Low and IN1 High

3)IN1 and IN2 PWM with 100kHz duty

Vm 12V is given

Vref 3.3V

Pmode is given high

Imode is grounded with 30k

Iprop is grounded with 1500ohms.

Please correct me if anything I have done wrong

over 1 year ago

0 Shinya Morita over 1 year ago

TI__Mastermind 24875 points

Hi,

Thank you for your question.

One possibility is nSLEEP pin is low. Then OUTPUT does not toggle.

And IMODE 30Kohm is not range of SPEC. Suggest to GND for trial.

regards

Shinya Morita

0 reshma b over 1 year ago

Prodigy 20 points

Hi,

For nSLeep a high value is given.

Corrected the resistor values.But same issue persists

Thanks and Regards

Reshma

0 Shinya Morita over 1 year ago in reply to reshma b

TI__Mastermind 24875 points

Hi,

Thank you for your feedback.

Based on your feedback, there is a possibility DRV8876-Q1 SPICE model has some issue.

We already released next generation device DRV8243H-Q1. It provide SPICE model. Since it is new generation device, it has advantage for package size, functions.

DRV8243H-Q1 SPICE model may not be good alternative but it is what I can propose. Hopefully it works for your new design.

regards

Shinya Morita

0 reshma b over 1 year ago in reply to Shinya Morita

Prodigy 20 points

Thank you for your confirmation.

Actually for my application I needed DRV8872.Since the spice model was not available I chosed DRV8876.Let me check with DRV8243

Thanks and Regards

Reshma

0 Shinya Morita over 1 year ago in reply to reshma b

TI__Mastermind 24875 points

Thank you. Let me close this post.

regards

Shinya Morita

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DRV8876-Q1: Simulation error