TPS65951 Datasheet, PDF (64/170 Pages) Texas Instruments – Integrated Power Management/Audio Codec

TPS65951
SWCS053F – SEPTEMBER 2010 – REVISED MAY 2012
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5.1.6 Vibra H-Bridge
The digital signal from the pulse width modulated generator is fed to the Vibra H-bridge driver. The Vibra
H-bridge is a differential driver and is used to drive Vibra motors. The differential output allows dual
rotation directions.
5.1.6.1 Vibra H-Bridge Output Characteristics
Table 5-9 summarizes the Vibra H-bridge output characteristics.
Table 5-9. Vibra H-Bridge Output Characteristics
PARAMETER
VBAT voltage
Differential output swing (16-Ω load)
Output resistance
Load capacitance
Load resistance
Load inductance
Total harmonic distortion
TEST CONDITIONS
VBAT = 2.8 V
VBAT = 3.5 V
Sum of the differential H-Bridge outputs (PMOS
and NMOS output resistance)
Input frequency: 20 Hz to 10 kHz
MIN
2.8
3.6
4.3
8
TYP
3.6
16
30
MAX
4.8
UNIT
V
V_PP
5
Ω
100
pF
60
Ω
300
μH
10%
5.1.6.2 External Components and Application Schematics
Figure 5-16 shows a simplified Vibra H-bridge schematic.
On Board
VBAT
Chip
Vibrator
C_V.V
Ferrite Chip Bead
C_V.P
L_V.P
Ferrite Chip Bead
C_V.M
L_V.M
VBAT.VIBRA
VIBRA.P
VIBRA.M
VIBRA.GND (LED.GND)
Figure 5-16. Vibra H-Bridge
SWCS053-032
NOTE
For other values regarding the components, see Table 12-1, TPS65951 External
Components.
Example of ferrite: BLM 18BD221SN1.
64
Audio/Voice Module
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