Datasheet Middle Power Class-D Speaker Amplifier series 20W+20W Full Digital Speaker Amplifier with built-in DSP BM28720MUV General Description Features BM28720MUV is a Full Digital Speaker Amplifier with This IC includes the DSP (digital sound processor) built-in DSP (Digital Sound Processor) designed for for Audio signal processing for Flat TVs. Flat-panel TVs in particular for space-saving and 12 Band/ch BQ, 3 Band DRC, Pre-Scaler, low-power consumption, delivers an output power of Channel Mixer, Fine Master Volume, 20W+20W. This IC employs Bipolar, CMOS, and Hard Clipper, Level Meter etc. DMOS (BCD) process technology that eliminates This IC has one input systems of digital audio turn-on resistance in the output power stage and interface. (No needs of Master Clock) 2 internal loss due to line resistances up to an ultimate - I S / LJ / RJ format level. With this technology, the IC can achieve high - LRCLK: 32k/44.1k/48KHz efficiency. In addition, the IC is packaged in a compact - BCLK: 32fs / 48fs / 64fs reverse heat radiation type power package to achieve - SDATA: 16 / 20 / 24bit low power consumption and low heat generation and This IC has one output systems of digital audio eliminates necessity of external heat-sink up to a total interface. 2 output power of 40W. This product satisfies both needs - I S format for drastic downsizing, low-profile structures and many - SDATA: 16 / 20 / 24bit function, high quality playback of sound system. With wide range of power supply voltage. The monaural output that can reduce the number of Key Specifications external parts can be used. Supply voltage (VCC) 10V to 24V With high efficiency and low heat dissipation contributing to miniaturization, slim design, and also Speaker output power 20W+20W (Typ.) power saving of the system. (VCC=18.5V, RL=8) Eliminates pop-noise generated during the power THD+N 0.07 % (Typ.) supply on/off. High quality muting performance is realized by using the soft-muting technology. This IC is built-in with various protection functions for highly reliability design. Applications - High temperature protection Flat Panel TVs (LCD, OEL) - Under voltage protection Home Audio - Output short protection Desktop PC - DC voltage protection - Clock stop protection Amusement equipments Small package Electronic Music equipments, etc. Typical Application Circuit Package W(Typ) x D(Typ) x H(Max) SP ch1 SP ch2 (Lch) VQFN032V5050 5.00mm x 5.00mm x 1.00mm (Rch) VQFN032V5050 Digital Audio MCU Source Figure 1. Typical application circuits Product structureSilicon monolithic integrated circuit This product has not designed protection against radioactive rays . www.rohm.com TSZ02201-0C1C0E900060-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/75 TSZ2211114001 10.Jun.2016 Rev.003 RSTX MUTE BSP1P OUT1P SCL SDA ERROR OUT1N BSP1N SDATAO SDATA BSP2P LRCLK OUT2P BCLK OUT2N BSP2NRSTX MUTEX SCL SDA BM28720MUV Pin configuration and Block diagram 32 31 30 29 28 27 26 25 BSP1P OUT1P NC REG G Control 1 2 wire I/F 24 ADDR VCCP1 I/F Driver FET 1P 2 23 BCLK GNDP1 2 I S/LJ/RJ Driver 3 22 LRCLK BSP1N I/F FET 1N 4 21 8 Times SDATA OUT1N PWM Over- Audio Modulator Sampling DSP 5 TEST1 Digital 20 OUT2P Filter Driver 6 19 PLL FET 2P BSP2P PLL 7 REG15 18 Driver GNDP2 FET 2N Protection 8 17 VCCP2 DGND DVDD TEST2 TEST3 SDATAO BSP2N OUT2N ERROR NC 9 10 11 12 13 14 15 16 Figure 2. Pin configurations and Block diagram (Top View) Pin Description No. Name I/O No. Name I/O No. Name I/O No. Name I/O 1 ADDR I 9 TEST2 I 17 VCCP2 - 25 OUT1P O 2 BCLK I 10 DVDD - 18 GNDP2 - 26 BSP1P I 3 LRCK I 11 TEST3 I 19 BSP2P I 27 REG G O 4 SDATA I 12 SDATAO O 20 OUT2P O 28 NC - 5 TEST1 I 13 ERROR O 21 OUT1N O 29 RSTX I 6 PLL - 14 NC - 22 BSP1N I 30 MUTEX I 7 REG15 O 15 BSP2N I 23 GNDP1 - 31 SCL I 8 DGND - 16 OUT2N O 24 VCCP1 - 32 SDA I/O I = input O = output - = others www.rohm.com TSZ02201-0C1C0E900060-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/75 TSZ22111 15 001 10.Jun.2016 Rev.003