RT5509 Speaker Amplifier with Speaker Protection Features General Description Class-D Speaker AMP The RT5509 is a mono BTL class-D amplifier with 4.3W Output Power 9.5V, 8 Load, THD < 1% cutting-edge speaker protection algorithm. Also, a 0/3/6/9/12/15/18dB Boost Gain built-in DC-DC step-up converter is used to provide 20V Output Noise 0dB Gain 2 efficient power for class-D amplifier. I S interface Boost Converter supports two different audio sources while a pair of Adaptive Boost for Speaker, Boost from auxiliary DATAI/O is used for stereo mode or Battery Supply Up to Programmed Voltage, pass-through application. Chip information including Max 9.5V gain, speaker protection output or current sense is able Power Modes : Adaptive Boost, Fixed Boost, to be monitored via DATAO through proper register Bypass Mode setting. Speaker protection provides mechanical / Switching Frequency 2MHz, Maximum Output thermal protection with accuracy of 10%/ 10C of rated Current 1.5A limit. Support CCM / DCM Compensation, Feedback AD Ordering Information Digital Part : Voltage Loop in Boost Mode RT5509 Digital Package Type 2 WSC : WL-CSP-48B 3.04x2.99 (BSC) Digital Audio Interface Support I S, Left-Justified, Right-Justified Note : 2 I S Sampling Rate Support Up to 48kHz, 24-bit Richtek products are : Digital Filter, Digital Volume, DRC/Noise Gate RoHS compliant and compatible with the current Speaker Protection requirements of IPC/JEDEC J-STD-020. Speaker Amplitude Estimation Accuracy : Error < 10% Suitable for use in SnPb or Pb-free soldering Bl Calibration Function processes. Temperature Sensing Marking Information Speaker Temperature Estimation Accuracy : Error < 10C 0R : Product Code YMDNN : Date Code 0R YM Applications DNN Smart Phone Tablet Simplified Application Circuit 1.8V VBAT SDA Control LX SCL Interface VSPOUTN RT5509 DAI1 LRCK1 VSPOUTP BCK1 GND DATAO Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation DS5509-01 September 2017 www.richtek.com 1 DVDD VBATRT5509 Pin Configuration (TOP VIEW) A1 A2 A3 A4 A6 A7 LRCK1 DAI1 DATAO INT VSPOUTN PVDD B1 B2 B3 B4 B5 B6 B7 BCK1 DGND DATAI RST PGND PGND PVDD C1 C2 C3 C4 C5 C6 C7 DAI2 DGND DGND TSTA2 PGND VSPOUTP PVDD D1 D2 D3 D4 D5 D6 D7 LRCK2 DGND DGND TSTA1 AGND NC1 NC2 E1 E2 E3 E4 E5 E6 E7 BCK2 DGND DGND DGND BGND LX VBST F1 F2 F3 F4 F5 F6 F7 SDA ADS1 ADS2 AGND BGND LX VBST G7 G1 G2 G3 G4 G5 G6 SCL BGND LX VBST VBAT DVDD AGND WL-CSP-48B 3.04x2.99 (BSC) Functional Pin Description Pin No. Pin Name Type Pin Function 2 A1 LRCK1 I I S word select 1. 2 A2 DAI1 I I S data input 1. 2 A3 DATAO O I S data output. A4 INT O Interrupt output. A6 VSPOUTN O Class-D inverting output. A7 PVDD P Class-D supply voltage. 2 B1 BCK1 I I S Bit clock 1. B2 DGND G Digital / Analog ground. 2 B3 DATAI I I S data input 3. B4 RST I Reset input. B5 PGND G Power ground. B6 PGND G Power ground. B7 PVDD P Class-D supply voltage. 2 C1 DAI2 I I S data input 2. C2 DGND G Digital ground. C3 DGND G Digital ground. C4 TSTA2 O Test output 2 / short to GND. C5 PGND G Power ground. C6 VSPOUTP O Class-D non-inverting output. C7 PVDD P Class-D supply voltage. 2 D1 LRCK2 I I S word select 2. Copyright 2017 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation www.richtek.com DS5509-01 September 2017 2