stmpe16m31 STMicroelectronics, stmpe16m31 Datasheet - Page 74

• Manufacturer Part Number: stmpe16m31
• Description: S-touch? 16/24-channel Touchkey Controller With Pwm And Ratio Engines
• Manufacturer: STMicroelectronics

Application information
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17.1
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Application information
Average current consumption
In application, it is unlikely that touch event occurs 100% of the time. Power consumption for
STMPExxM31 can be reduced significantly with the proper use of the available device Sleep
mode. The device can be programmed into Sleep mode upon detecting of the finger lift.
During the Sleep mode, upon detecting a touch, STMPExxM31 goes from Sleep to Active
mode after 15 ms.
As such, for an example touch profiles in
over the 6 seconds is:
= [(0.185+0.285+0.285) * 400 uA + ( 5.245 * 50 uA)]/6
= 94 uA.
Figure 20. Average current consumption
400 u A
5 0 u A
0 .0 s
0 .3 s
0 .5 s
0 .8 s
Doc ID 16174 Rev 3
1 .1 s
Figure 20
below, the Average current consumption
2 .3 s
STMPE16M31, STMPE24M31
2 .6 s
6 .0 s
AM08687V1