BD5426MUV_10 Datasheet, PDF (1/16 Pages) Rohm – Analog Input / BTL Output Class-D Speaker Amplifier

Middle Power Class-D Speaker Amplifiers
Analog Input / BTL Output
Class-D Speaker Amplifier
BD5426MUV
No.10075EBT08
●Description
BD5426MUV is a 10W + 10W stereo class-D power amplifier IC, developed for space-saving and low heat-generation
applications such as low-profile TV sets. The IC employs state-of-the-art 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 has achieved high efficiency of 87% (9W + 9W output with 8Ω load), which is the
top class in the industry. The IC, in addition, employs a compact back-surface heat radiation type power package to achieve
low power consumption and low heat generation and eliminates necessity of installing an external radiator, up to a total
output of 20W. This product satisfies both needs for drastic downsizing, low-profile structures and powerful, high-quality
playback of the sound system.
●Features
1) A high efficiency of 87% (9W + 9W output with 8Ω load), which is the highest grade in the industry and low heat-generation.
2) An output of 10W + 10W (13V, with 8Ω load) is allowed without an external heat radiator.
3) Driving a lowest rating load of 6Ω is allowed.
4) Pop noise upon turning power on/off and power interruption has been reduced.
5) High-quality audio muting is implemented by soft-switching technology.
6) An output power limiter function limits excessive output to speakers.
7) High-reliability design provided with built-in protection circuits against high temperatures, against VCC shorting and
GND shorting, against reduced-voltage, and against applying DC voltage to speaker.
8) A master/slave function allowing synchronization of multiple devices reduces beat noises.
9) Adjustment of internal PWM sampling clock frequencies (250 kHz to 400kHz) allows easy protective measures against
unwanted radio emission to AM radio band.
10) A compact back-surface heat radiation type power package is employed.
VQFN048V7070 7.0mm × 7.0mm × 1.0mm, pitch 0.5mm
●Absolute maximum ratings
A circuit must be designed and evaluated not to exceed absolute maximum rating in any cases and even momentarily, to prevent
reduction in functional performances and thermal destruction of a semiconductor product and secure useful life and reliability.
The following values assume Ta =25℃. For latest values, refer to delivery specifications.
Parameter
Supply voltage
Power dissipation
Input voltage for signal pin
Symbol
VCC
Pd
VIN
Ratings
+20
3.28
4.8
-0.2 ~ +7.2
Unit
Conditions
V
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47
(Note 1, 2)
W (Note 3)
W (Note 4)
V Pin 6, 7 (Note 1)
Input voltage for control pin
VCONT
-0.2 ~ VCC+0.2
V Pin 28, 32 (Note 1)
Input voltage for clock pin
VOSC
-0.2 ~ +7.2
V Pin 31 (Note 1)
Operating temperature range
Topr
-40 ~ +85
℃
Storage temperature range
Tstg
-55 ~ +150
℃
Maximum junction temperature
Tjmax
+150
℃
(Note 1) A voltage that can be applied with reference to GND (pins 5, 18, 19, 42, and 43)
(Note 2) Pd and Tjmax=150℃ must not be exceeded.
(Note 3) 114.3mm × 76.2mm × 1.6mm FR4 2-layer glass epoxy board (Copper Area 5505mm2) installed.
If used under Ta=25℃ or higher, reduce 26.2mW for increase of every 1℃. The board is provided with thermal via.
(Note 4) 114.3mm × 76.2mm × 1.6mm FR4 4-layer glass epoxy board (Copper Area 5505mm2) installed.
If used under Ta=25℃ or higher, reduce 38.4mW for increase of every 1℃. The board is provided with thermal via.
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2010.05 - Rev.B