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Decapped BMS Chips
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I've been slowly accruing a collection of battery monitoring system
(BMS) chips, each designed to monitor a stack of battery cells in a
multi-cell battery pack. Other than the die area,
I shouldn't say much about them. I designed the secondary bandgap
reference on the MAX17823, and learned about some under
some NDA.
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A yellow tape measure with black
millimeter marks was used to estimate die size in the following photos.
The estimates are probably within about 10%.
Click on any photo for a higher resolution image.
bq79606 |
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| Die area: 4.36mm x 4.24mm = 18.5mm2
Channel count: 6
The bq79606 went into production summer 2019.
| LTC6813 |
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| LTC6811 |
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| Die area: 3.07mm x 2.79mm = 8.6mm2
and 2.51mm x 1.01mm = 2.5mm2
Channel count: 12
| MAX17823 |
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| Die area: 4.36mm x 4.15mm = 18.1mm2
Channel count: 12
| bq76pl536a |
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| Die area: 4.31mm x 3.85mm = 16.6mm2
Channel count: 6
As the Internet will tell you (ex. Jarrod on hackaday.io), this is the chip used in the Tesla Model S.
| bq7694003dbt |
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| Die area: 1.92mm x 2.29mm = 4.4mm2 per die,
13.2mm2 for all three
| AD7280 |
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| Die area: 2.32mm x 4.62mm = 10.7mm2
and 1.78mm x 2.58mm = 4.6mm2
The AD7280 is a fairly old chip, of an older generation.
| ISL78600 |
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| Die area: 3.90mm x 4.43mm = 17.2mm2
I got the ISL78600 from some sketchy Chinese web site, if I
recall well.
| LG |
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| Die area: 4.36mm x 3.80mm = 16.6mm2
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Last updated 26 September 2019
© Anna Mitros
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