ZHCS477K September 2011 – August 2022 BQ294502 , BQ294504 , BQ294506 , BQ294512 , BQ294522 , BQ294524 , BQ294532 , BQ294533 , BQ294534 , BQ294582 , BQ294592
PRODUCTION DATA
8.4.3 Customer Test Mode
Customer Test Mode (CTM) helps to reduce test time for checking the overvoltage delay timer parameter once the circuit is implemented in the battery pack. To enter CTM, set VDD to at least 10 V higher than V3 (see Figure 8-2). The delay timer is greater than 10 ms, but considerably shorter than the timer delay in normal operation. To exit CTM, remove the VDD to VC3 voltage differential of 10 V so that the decrease in this value automatically causes an exit.
Avoid exceeding any Absolute Maximum Voltages on any pins when placing the part into CTM. Also avoid exceeding Absolute Maximum Voltages for the individual cell voltages (V3–V2), (V2–V1), and (V1–VSS). Stressing the pins beyond the rated limits may cause permanent damage to the device.
Figure 8-2 shows the timing for CTM.
Figure 8-2 Timing for Customer Test ModeFigure 8-3 shows the measurement for current consumption for the product for both VDD and Vx.
Figure 8-3 Configuration for IC Current Consumption Test