BM28720MUV Datasheet, PDF (1/79 Pages) Rohm – 20W+20W Full Digital Speaker Amplifier with built-in DSP

Datasheet
Middle Power Class-D Speaker Amplifier series
20W+20W
Full Digital Speaker Amplifier
with built-in DSP
BM28720MUV
General Description
BM28720MUV is a Full Digital Speaker Amplifier with
built-in DSP (Digital Sound Processor) designed for
Flat-panel TVs in particular for space-saving and
low-power consumption, delivers an output power of
20W+20W. This IC employs Bipolar, CMOS, and
DMOS (BCD) process technology that eliminates
turn-on resistance in the output power stage and
internal loss due to line resistances up to an ultimate
level. With this technology, the IC can achieve high
efficiency. In addition, the IC is packaged in a compact
reverse heat radiation type power package to achieve
low power consumption and low heat generation and
eliminates necessity of external heat-sink up to a total
output power of 40W. This product satisfies both needs
for drastic downsizing, low-profile structures and many
function, high quality playback of sound system.
Key Specifications
■ Supply voltage (VCC)
■ Speaker output power
(VCC=18.5V, RL=8Ω)
■ THD+N
10V to 24V
20W+20W (Typ.)
0.07 [%] (Typ.)
Applications
■ Flat Panel TVs (LCD, OEL)
■ Home Audio
■ Desktop PC
■ Amusement equipments
■ Electronic Music equipments, etc.
Package
VQFN032V5050
W(Typ) x D(Typ) x H(Max)
5.00mm x 5.00mm x 1.00mm
Features
■ This IC includes the DSP (digital sound processor)
for Audio signal processing for Flat TVs.
12 Band/ch BQ, 3 Band DRC, Pre-Scaler,
Channel Mixer, Fine Master Volume,
Hard Clipper, Level Meter etc.
■ This IC has one input systems of digital audio
interface. (No needs of Master Clock)
- I²S / LJ / RJ format
- LRCLK: 32k/44.1k/48KHz
- BCLK: 32fs / 48fs / 64fs
- SDATA: 16 / 20 / 24bit
■ This IC has one output systems of digital audio
interface.
- I²S format
- SDATA: 16 / 20 / 24bit
■ With wide range of power supply voltage.
■ The monaural output that can reduce the number of
external parts can be used.
■ With high efficiency and low heat dissipation
contributing to miniaturization, slim design, and also
power saving of the system.
■ Eliminates pop-noise generated during the power
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.
- High temperature protection
- Under voltage protection
- Output short protection
- DC voltage protection
- Clock stop protection
■ Small package
Typical Application Circuit
SP ch1
(Lch)
SP ch2
(Rch)
VQFN032V5050
Digital
Audio
MCU
Source
Figure 1. Typical application circuits
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has not designed protection against radioactive rays
1/75
TSZ02201-0C1C0E900060-1-2
10.Jun.2016 Rev.003