High & Low Drivers

Mike,

Thank you for your post.  

A couple of questions:

1)  I noticed these are automotive parts with load dump specifications, etc.  Is this for an automotive application where Q100 qualification is required?  

2)  What is the load current in your system?  Can you tell me a little more about what you are driving....motor type?  We have some integrated parts that include the power FETs that might be better suited as a complete solution.  If I know what current you need, I can make some suggestions for you.

3)  Voltage range in your system that must be supported?

Regards,

Ryan

Ryan,

Thanks for the quick reply - I failed to provide some of the details.  No auto or Q100 qual is required.  A critical requirement is ability to control each driver independently.  Here's the full requirements list:

• Any combination of: Single H-Bridge driver, 2 half bridge drivers or, discrete High/Low side drivers.
• Each of the drivers should be able to be driven independently and connected to independent loads.
• Capable of driving 3A loads (after derating for 85C ambient). This will be about 100mOhms Rds or less, depending on thermal/packaging with typical current rating of about 10A.
• Include overload / over current / thermal protection
• Allow for reverse polarity protection
• Surface mount
• No heat-sink required

Mike

Mike,

Take a look at the DRV8412.  You can configure it in a Parallel BTL mode and cut the Rdson down to ~60mohm.  Device is surface-mount with exposed thermal pad on the bottom for heat sinking into copper in the board.  

It has a PWM  input.  In the PBTL mode, the OUTA/OUTB outputs will track PWM_A input and OUTC/OUTD will track PWM_B input.  Deadtime control is built-in.  

http://focus.ti.com/docs/prod/folders/print/drv8412.html

Regards,

Ryan

Ryan,

This is great!  What a beast of a part!  One other thing I'd like to ask, though.  Is there a similar 2-chip solution with separate Hi & Low side drivers?  This is not actually for a motor, but the motor driver parts work well.  Physically separating the 2 sides may give me a little more flexibility.

Thanks.

Mike,

We will be releasing a "pre-driver" part in June that will allow independent control of external FETs.  The part number is DRV8301.  It is in preview state now.  If you post your email, I can send you a preliminary datasheet.

Regards,

Ryan