RT5509
Functional Block Diagram
VBAT
DVDD
SDA
SCL
I
2
C
Interface
Register
Table
Coef.
RAM
UVP
OVP
OTP
OCP
LX
VBST
Boost
BGND
PVDD
Gain
Control
&
CLIP (low
battery)
VSPOUTP
PWM
Class D
VSPOUTN
PGND
INT
Current
Sense
RST
DAI1
DAI2
LRCK1
LRCK2
BCK1
BCK2
DATAI
DATAO
I
2
S
Interface
10 Biquad
Filter
Speaker
Protection
TSTA1
TSTA2
NC1
NC2
ADS1
AGND
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DGND
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www.richtek.com
4
ADS2
DS5509-01
September
2017