BD28412MUV Datasheet, PDF (1/44 Pages) Rohm – 9W+9W Analog Input Class D Speaker Amplifier

Datasheet
Low Power Consumption Class D Amplifier
9W+9W Analog Input
Class D Speaker Amplifier
BD28412MUV
General Description
BD28412MUV is a 9W+9W stereo (or 18W monaural)
class D amplifier, developed for battery equipped
speaker systems such as wireless speakers. This IC is
incorporated with a precise oscillator to generate
multiple switching frequencies that can avoid the AM
radio interference. In addition, 2.1Ch audio system can
be realized by master and slave operation without beat
noise caused by interference between two ICs.
Furthermore, this IC achieves lower power
consumption that eliminates the need for an external
heat sink.
Features
 Analog Differential Input
 Low Standby Current
 Output Feedback Circuitry Prevents Sound
Quality Degradation Caused by Power Supply
Voltage Fluctuation, Achieves Low Noise and Low
Distortion, Eliminates the Need of Large
Electrolytic-Capacitors for Decoupling
 Power Limit Function
(Linearly-programmable)
 Selectable Switching Frequency
(AM Avoidance Function)
 Synchronization Control is Supported
(Selectable Master and Slave Operation)
 Parallel BTL (PBTL) is Supported
 Wide Voltage Range (V_CC=4.5V to 13V)
 High Efficiency and Low-heat-generation Make
the System Smaller, Thinner, and More
Power-saving
 Pop Noise Prevention During Power Supply
ON/OFF
 High Reliability Design by Built-in Protection
Circuits
- Overheat Protection
- Under Voltage Protection
- Output Short Protection
- Output DC Voltage Protection
 Small Package (VQFN032V5050) Achieves Mount
Area Reduction
Key Specifications
 Supply Voltage Range:
4.5V to 13V
 Speaker Output Power:
9W+9W (Typ)
(V_CC=12V, R_L=8Ω, PLIMIT=0V)
 Speaker Output Power(PBTL):
18W (Typ)
(V_CC=12V, R_L=4Ω, PLIMIT=0V)
 Total Harmonic Distortion Ratio:
0.03% (Typ) @Po=1W
 Crosstalk:
(V_CC=11V, R_L=8Ω, PLIMIT=0V)
100dB (Typ)
 PSRR:
55dB (Typ)
 Output Noise Voltage:
-80dBV (Typ)
 Standby Current:
0.1µA (Typ)
 Operating Current:
16mA (Typ)
(No load or filter, No signal)
 Operating Temperature Range: -25°C to +85°C
Package
VQFN032V5050
W(Typ) x D(Typ) x H(Max)
5.00mm x 5.00mm x 1.00mm
VQFN032V5050
Typical Application Circuit
Applications
 Wireless Speakers, Small Active Speakers,
Portable Audio Equipments, etc.
Figure 1. Typical Application Circuit
〇Product structure : Silicon monolithic integrated circuit
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© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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TSZ02201-0C1C0E900620-1-2
21.Sep.2016 Rev.003