Electrical interface

Vibra needs one line from flex for operating. The line is VIBRA.

The VIBRA line is also connected to BATGND via 33nF and 2.2uF capacitors for filtering the interference. Capacitors locate near to the vibra. Vibra driver has also protective diodes (see Electrical interface of Vibra) because of inductive characteristic of the vibra.

The vibra component is controlled by UEM vibra driver.

Figure 35: Electrical interface of Vibra

Principle figure of the driver in UEM

Figure 35: Electrical interface of Vibra

Principle figure of the driver in UEM

VTBRA line

LS4 board

VTBRA line

LS4 board i>f

-33nF

Vbat

Table 7: Electrical properties of the VIBRA signal

Unit

Min

Nom

Max

Current via vibra

5Q mA

BQ mA

135 mA

Vbat

3.Q V

3.7 V

4.2 V

Possible VIBRA signal frequency

64Hz, 129Hz, 258Hz and 52QHz

VIBRA pulse duty cycle

3%

47%

97%

Figure 36: Principle figure of the VIBRA signal

Vbat

positive cycle

0 V

negative cycle

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