The BQ79606A-Q1 device provides simultaneous, high accuracy, channel measurements for three to six battery cells. With the inclusion of a daisy chain communication port, the BQ79606A-Q1 device is stackable (up to 64 devices) to support the large stack configurations found in battery packs for electrified automotive drive trains. Providing a Delta Sigma converter per cell input, the BQ79606A-Q1 allows simultaneous measurement of the battery voltages.
The BQ79606A-Q1 includes an auxiliary ADC that supports cell temperature measurements for up to six NTCs as well as internal rails to enable safety checks for the device. A die temperature measurement ADC is also included to provide temperature correction to enable high accuracy results over an extended temperature range.
Host communication to the BQ79606A-Q1 device is done via dedicated UART interface. Additionally, an isolated, differential daisy-chain communication interface that supports either capacitor or transformer isolation allows the host to communicate with the entire battery stack. The daisy-chain communication interface can be configured (optional) in a ring architecture that allows the host to talk to devices at either end of the stack in cases of communication line breaks.
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|Part number||Order||Vin (Max) (V)||Number of series cells (Min)||Number of series cells (Max)||Features||Operating temperature range (C)||Rating||Package Group||Package size: mm2:W x L (PKG)|
Open wire detection
Requires separate MCU
Stackable (built-in interface)
|-40 to 105||Automotive||HTQFP | 48||48HTQFP: 81 mm2: 9 x 9 (HTQFP | 48)|
||79.2||6||16||Cell Balancing||-40 to 85||Catalog||TQFP | 80||80TQFP: 144 mm2: 12 x 12 (TQFP | 80)|
|BQ76PL455A-Q1||Samples not available||79.2||6||16||Cell Balancing||-40 to 105||Automotive||TQFP | 80||80TQFP: 144 mm2: 12 x 12 (TQFP | 80)|
||27||3||6||Cell Balancing||-40 to 105||Automotive||HTQFP | 64||64HTQFP: 144 mm2: 12 x 12 (HTQFP | 64)|