This section shows how to use the data
of Figure 3-1 to calculate the smartphone scenarios.
- Phone call-15 times a day
- Dial phone numbers:
Assume the user dials 10 numbers in each phone call. There are a total
of 150 clicks.
- Receive phone calls:
Assume each phone call received has 12 buzzes, every 2 buzz combines a
ringing. There are a total of 180 buzz effects.
- Text Message-15 times a day
- Write a text message:
Assume 40 words in each text message, each word combines 5 characters.
There are a total of 3000 clicks.
- Receive a text message:
Assume there are 4 alerts when receiving a text message. There are 60
alerts in total.
- Email-5 times a day
- Reply to an email: Assume
there are 60 words in each email, each word combines 5 characters. There
are a total of 1500 clicks.
- Receive an email: Assume
each text message received has 4 alerts. There are 20 alerts in total.
- Reminding-10 times a day
Assume each reminder consists of 10 alerts and 10
buzzes.
- Games-60 minutes a day
Different games use different effects, so just
assume they include the following effects in 10 minutes and games are played for
one hour each day.
- Bump: 100 times
- Click: 500 times
- Pulse: 200 times
- Alert: 150 times
- Buzz: 20 times
- Social media- 60 minutes a day
Assume there are the following effects in 10
minutes, and then interpolate the data for 60 minutes.
- Bump: 70 times
- Click: 400 times
- Pulse: 80 times
- Alert: 60 times
- Buzz: 12 times
- Other- 60 minutes a day,
including search, web, news, clock
Assume there
are following effects and people consumed the total time of one hour on these
actions.
- Bump: 720 times
- Click: 2400 times
- Pulse: 360 times
- Alert: 312 times
- Buzz: 78 times
Standby energy consumption
The typical DRV260x driver standby current is 1.9 µA while the typical for the
DRV262x driver is 1.55 µA , and the DRV2667 (Piezo driver) standby current is 10 µA.
For one day the energy consumption of ERM and LRA drivers is 45.6 µAh or 37.2 µAh
for DRV260x or DRV262x respectively, and Piezo driver is 240 µAh.