RT5509
Speaker Amplifier with Speaker Protection
General Description
The RT5509 is a mono BTL class-D amplifier with
cutting-edge speaker protection algorithm. Also, a
built-in DC-DC step-up converter is used to provide
efficient power for class-D amplifier. I
2
S interface
supports two different audio sources while a pair of
auxiliary DATAI/O is used for stereo mode or
pass-through application. Chip information including
gain, speaker protection output or current sense is able
to be monitored via DATAO through proper register
setting. Speaker protection provides mechanical /
thermal protection with accuracy of 10%/±10C of rated
limit.
Features
Class-D Speaker AMP
4.3W Output Power @ 9.5V, 8 Load, THD < 1%
0/3/6/9/12/15/18dB Boost Gain
20V Output Noise @ 0dB Gain
Boost Converter
Adaptive Boost for Speaker, Boost from
Battery Supply Up to Programmed Voltage,
Max 9.5V
Power Modes : Adaptive Boost, Fixed Boost,
Bypass Mode
Switching Frequency 2MHz, Maximum Output
Ordering Information
RT5509
Package Type
WSC : WL-CSP-48B 3.04x2.99 (BSC)
Note :
Richtek products are :
Current 1.5A
Support CCM / DCM Compensation, Feedback
AD
Digital Part : Voltage Loop in Boost Mode
Digital Audio Interface Support I
2
S,
Left-Justified, Right-Justified
I
2
S Sampling Rate Support Up to 48kHz, 24-bit
Digital Filter, Digital Volume, DRC/Noise Gate
Speaker Protection
Speaker Amplitude Estimation Accuracy : Error
< 10%
Bl Calibration Function
Temperature Sensing
Speaker Temperature Estimation Accuracy :
Error <
±10C
Digital
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering
processes.
Marking Information
0R YM
DNN
0R : Product Code
YMDNN : Date Code
Applications
Smart Phone
Tablet
Simplified Application Circuit
1.8V
VBAT
Control
Interface
SDA
SCL
DAI1
LRCK1
BCK1
DATAO
DVDD
VBAT
LX
RT5509 VSPOUTN
VSPOUTP
GND
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation
DS5509-01
September
2017
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
