t

OUT (V)

Test Pin (V1)

VDD

VDD – Test Pin (V1) = 10 V

OUT

VDD

VSS

1

3

2

6

4

5

3.6 V

I

IN

I

CC

bq2946xy

NC

VSS

V1

PWRPAD

bq294602, bq294604

www.ti.com

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.

Figure 8. Timing for Customer Test Mode

Figure 9 shows the measurement for current consumption for the product for both VDD and Vx.

Figure 9. Configuration for IC Current Consumption Test

Copyright © 2011–2012, Texas Instruments Incorporated

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