BQ294602 Datasheet, PDF (9/17 Pages) Texas Instruments – Single-Cell Protector for Li-Ion Batteries

bq294602, bq294604
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SLUSAS0B – DECEMBER 2011 – REVISED MARCH 2012
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, VDD should be set to at least 10 V higher than V1
(see Figure 8). The delay timer is greater than 10 ms, but considerably shorter than the timer delay in normal
operation. To exit Customer Test Mode, remove the VDD to V1 voltage differential of 10 V so that the decrease
in this value automatically causes an exit.
CAUTION
Avoid exceeding any Absolute Maximum Voltages on any pins when placing the part
into Customer Test Mode. Also avoid exceeding Absolute Maximum Voltage for the
cell voltage (V1–VSS). Stressing the pins beyond the rated limits may cause
permanent damage to the device.
Figure 8 shows the timing for the Customer Test Mode.
VDD – Test Pin (V1) = 10 V
VDD
Test Pin (V1)
OUT (V)
t DELAY > 10 ms
Figure 8. Timing for Customer Test Mode
Figure 9 shows the measurement for current consumption for the product for both VDD and Vx.
bq2946xy
1 NC
OUT 6
IIN
2 V1
VDD 5
ICC
3 VSS
VSS 4
PWRPAD
3.6 V
Figure 9. Configuration for IC Current Consumption Test
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