SLUSDQ4 April 2019 BQ79606A-Q1
The BQ79606A-Q1 AFE allows monitoring of up to 6 cells. The interface to these cells is provided using seven VC inputs, labeled VC0 through VC6. The cell monitoring is programmable for on-demand or continuous sampling of all, or a subset, of the connected cells. When multiple cell conversions are selected, either on-demand or continuous, the cell voltages are read simultaneously to provide a snapshot of the stack voltage at a particular point in time. This allows for measurements to be synchronized with current readings and enable a more accurate gauging solution.
Nearly all of the components required for analog front end filtering and surviving hot-plug testing are integrated into the BQ79606A-Q1. Additionally, for hot-plug requirements, the device can handle high voltage spikes of up to +/-33 V, therefore no Zener and regular diode clamps are required for voltage spikes below that level. For voltage spikes that may be higher than the absolute maximum rating of the device, additional clamping is required. An external RC filter on VC* and CB* is required to filter out high frequency voltage spike and hot-plug events. The pins are internally clamped to facilitate the use of the inexpensive, low voltage (10V) ceramic capacitors. See VC* Inputs for more details on selecting these components.