RT9107B Datasheet, PDF (1/42 Pages) Richtek Technology Corporation – Dual-Channel Digital Audio System

®
RT9107B
Dual-Channel Digital Audio System with EQ and DRC
Control
General Description
The RT9107B is a high efficiency, I²S-input, stereo or 2.1-
channel audio power amplifier delivering 2x18W into 8Ω
BTL speaker loads. It can deliver over 90% power efficiency
and eliminate the need for heat sink.
The built-in anti-pop function can reduce the speaker's
pop noise under all kind of scenarios. Built-in protections
include over temperature, over current, over voltage, and
under voltage protections and report error status.
The RT9107B is an I²S slave-only device receiving all
clocks from external sources. It can support a wide input
sampling rate from 8kHz to 96kHz, and operate with a
PWM switching frequency of 352kHz or 384kHz, depending
on the input sampling rate. A fully programmable data path
routes these channels to the internal speaker drivers.
The RT9107B features dual-band DRC and flexible multi-
band biquads for anti-clipping, power limiting, and speaker
equalization. Programmable signal path routing enables
Rich-surround effect and Rich-bass enhancement
implementation.
Features
 Wide Supply Voltage Range : 8V to 26V
 2x18W at 10% THD+N into 8Ω BTL at 18V
 2x8W at 10% THD+N into 8Ω BTL at 12V
 Support Stereo or 2.1-Channels
 Sampling Frequency from 8kHz to 96kHz
 Built-in anti-pop Function for BTL AD/BD
Modulations, SE Output Configuration
 >20 Programmable Biquads for Speaker
Equalization
 Programmable Coefficients for DRC Filters,
Supporting Multi-compression Ratios
 Built-in DC Blocking Filters
 Protection Features : UVLO, OVP, OCP and OTP
 TQFP-48L (Exposed Pad) Thermal-Enhanced
Package
 RoHS Compliant and Halogen Free
Applications
 LCD-TV
 Monitors
 Home Audio
 Amusement Equipment
 Electronic Music Equipment
Simplified Application Circuit
3.3V
8V to 26V
I²S Digital
Audio Source
I²C Signal
A_SEL
Control Inputs
RT9107B
AVDD/DVDD
PVDD_AB/CD
MCLK
OUT_A
LRCK
SCLK
SDIN
SDA
SCL
BST_A
BST_B
OUT_B
OUT_C
A_SEL
PWDNN
BST_C
BST_D
RESETB OUT_D
PGND
LC_BTL
LC_BTL
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS9107B-00 November 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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