User's Manual

SC14CVMDECT SF Cordless Voice Module
© 2012 Dialog Semiconductor B.V. 35 July 1, 2014 v1.6
Efficiency 75% at 300 mW@2 V, 500 mW@2.5 V into a 4  transducer.
Table 19: PAOUTp, PAOUTn external components
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
C_VDDPA Decoupling capacitor on
VDDPA
Required when Class-D is used
and guaranteed life time.
(see Figure 32)
1 F
Cs_PAOUT Snubber capacitor (to
reduce ringing at
PAOUTp/n)
Required when Class-D is used
to prevent EMI and guaranteed
life time. (see Figure 32)
1 nF
Rs_PAOUT Snubber resistor (to
reduce ringing at
PAOUTp/n)
Required when Class-D is used
to prevent EMI and guaranteed
life time. (see Figure 32)
1 
Figure 32 Class-D external components
PAOUTp
PAOUTn
VDDPA
VSS/GND
C_VDDPA
Cs_PAOUT
Rs_PAOUT
Rs_PAOUT
Figure 33 CLASS-D amplifier measurement setup
in
out
in
AP-system2, settings:
15 H
15H
4 
PAOUTp
PAOUTn
VDDPA
GND (2x)
dummy load
1 F ceramic
2.5 V (= VBAT)
DUT
100 
100 
(models typical speaker)
bw = <10 Hz until 30 kHz
filter = A-weighting
detection = 4/s RMS
input = high-ohmic
AP AUX-0025
passive switching ampli-
fier measurement filter
resistors reduce
influence from
measurement on
DUT