Clarification on VN9E30FTR Current Limit Specifications

[SrinivasNaikG]

I need some clarifications regarding the IC from STMicroelectronics: VN9E30FTR – 6-channel high-side driver with 24-bit SPI interface for traffic signal controller applications.

 In the datasheet, it is mentioned that the internally limited current is 35A for channels IOUT0, IOUT1, IOUT2, IOUT3, IOUT4, and IOUT5.

Could you please confirm:

1. Whether this 35A limit is shared across all channels ?
2. If possible, provide the maximum allowable current per channel in a tabular format for reference.

Additionally, please advise if there are any precautions we need to take when switching the load per channel.

The Lamp Driver IC which is being used in Traffic Signal Controller should be capable of driving a load current of at least 5A per channel when all channels are switched ON simultaneously:

• Channel 1 – 5A
• Channel 2 – 5A
• Channel 3 – 5A
• Channel 4 – 5A
• Channel 5 – 5A
• Channel 6 – 5A

Total Load: 5A × 6 channels = 30A (all channels ON simultaneously), or as per the maximum load specifications recommended for the VN9E30FTR from ST Microelectronics please clarify??

We request the following details:

1. Test procedure and a valid test report for the above operating scenario.
2. Availability status and details of Indian distributors for bulk ordering.
3. End-of-Life (EOL) information for the VN9E30FTR Lamp Driver Power IC.

Kindly provide the above information at the earliest.

[Ted THOMPSON]

Hello,

Yes, the 35A limit is shared across all channels
The absolute maximum allowable current per channel is internally limited, but typically 5.8 A max.

The VN9E30FTR is currently in a fully active status and EOL (end-of-Life) is not in the foreseeable future, but it is not currently part of ST’s Longevity program.

The VN9E30FTR is currently available in limited stock at the distributors: Newar/Elemnt14 and Farnell.

A valid test report for the requested operating scenario is not currently available.

Regards,

Ted T

[SrinivasNaikG]

Dear Sir,

Thank you very much for your detailed response regarding the VN9E30FTR device. I truly appreciate your clarification on the current sharing across channels, with the total device limit of 35 A and the typical maximum of 5.8 A per channel.

I would like to confirm a few additional points from the datasheet in relation to my application requirements:

IC Requirements:

• High-side switch type

• Normal Operating Voltage: 24 V

• 4 independent channels

• Minimum 5 A output current per channel

• Integrated SPI communication interface

• Built-in power MOSFETs

• Built-in current sensing capability

My main question is whether the VN9E30FTR is suitable for operation in a 24 V system, while meeting the above requirements. 

Your guidance on these points would be greatly appreciated to ensure proper device selection for my design.