Speaker Amplifier with Speaker Protection

RT5508

The RT5508 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. I²S 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%/±10°C of rated limit.

Applications

Smart Phone
Tablet

Key Spec.

	RT5508
Status	EOL
Output Channels	1
Vin (min) (V)	2.7
Vin (max) (V)	5.3
Pout @THD+N=10% (W)	2
Pout @THD+N=1% (W)	1.6
SNR (dB)	96
Amplifier Type	Class-D;Class-G
Features	Current Mode Control;DCR Current Sense;OCP;OTP;OVP;UVLO
Package Type	WL-CSP2.87x2.07-29(BSC)

Features

Class-D Speaker AMP
► 1.6W Output Power @ 5.3V, 8Ω Load, THD < 1%
► 0/3/6/9/12/15dB Boost Gain
► 20μV Output Noise @ 0dB Gain
Boost Converter
► Adaptive Boost For Speaker, Boost from Battery Supply Up to Programmed Voltage, Max 5.3V
► Power Modes : Adaptive Boost, Fixed Boost, Bypass Mode
► Switching Frequency 2MHz, Maximum Output Current 1A
► Support CCM / DCM Compensation, Feedback ADC
► Digital Part : Voltage Loop in Boost Mode
Digital
► Digital Audio Interface Support I²S, Left-Justified, Right-Justified
► I²S Sampling Rate Support up to 48kHz, 24-bit
► Digital Filter, Digital Volume, Multi-Band DRC
► Speaker Protection
► Speaker Amplitude Estimation Accuracy : Error < 10%
► Bl Calibration Function
► Temperature Sensing
► Speaker Temperature Estimation Accuracy : Error < ±10°C

Datasheet

DS5508-01.pdf

Datasheet

DS5508-01.pdf