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PDF BD5423MUV Data sheet ( Hoja de datos )
| Número de pieza | BD5423MUV | |
| Descripción | Analog Input / BTL Output Class-D Speaker Amplifier | |
| Fabricantes | ROHM Semiconductor | |
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Middle Power Class-D Speaker Amplifiers
Analog Input / BTL Output
Class-D Speaker Amplifier
BD5423MUV
No.10075EBT03
●Description
BD5423MUV is a 17W + 17W 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 90% (10W + 10W 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 34W.
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 90% (10W + 10W output with 8Ω load), which is the highest grade in the industry and low heat-generation.
2) An output of 17W + 17W (12V, with 4Ω load) is allowed without an external heat radiator.
3) Driving a lowest rating load of 4Ω 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 (250kHz 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
Symbol
Ratings
Unit
Conditions
Supply voltage
Power dissipation
VCC
+20
V
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47
(Note 1, 2)
Pd
3.28 W (Note 3)
4.8 W (Note 4)
Input voltage for signal pin
VIN -0.2 ～ +7.2 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.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/16
2010.05 - Rev.B
1 page  
BD5423MUV
●Electrical characteristic curves (Reference data) – Continued
Technical Note
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MUTEX
Pin 28
10V/div
TM
Pin 34
5V/div
Speaker output
2V/div
10msec/div
Vcc=12V
RL =8 Ω
Po=500mW
fin=500Hz
MUTEX
Pin 28
TM
Pin 34
Speaker output
10V/div
5V/div
Vcc=12V
RL =8 Ω
Po=500mW
fin=500Hz
2V/div
10msec/div
Fig. 13 Wave form when Releasing Soft-mute
Fig. 14 Wave form when Activating Soft-mute
Fig. 15 Wave form on Instantaneous Power Interruption
(20msec / div)
Fig. 16 Wave form on Instantaneous Power Interruption
(2msec / div)
Fig. 17 Wave form on Output Power Limiter function
(Po = 5W)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/16
2010.05 - Rev.B
5 Page 
BD5423MUV
●Explanation of Pin Functions - Continued
No. Symbol Pin voltage
Pin description
26 WARNING
H: 5V
L: 0V
Warning output pin
Pin to notify operation warning.
H: Under warning
L: Normal operation
Connect a resister.
27 ERROR
H: 5V
L: 0V
Error output pin
A pin for notifying operation errors.
H: Error
L: Normal operation
Connect a resister.
Technical Note
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Internal equalizing circuit
28 MUTEX
Audio mute control pin
- H: Mute off
L: Mute on
13, 24
29, 30
37,48
N.C.
N.C. pin
- Nothing is connected with IC internal
circuit.
31 OSC
Sampling clock signal input/output pin
- When using two or more sampling clocks,
connect via a capacitor.
32 MS
Master/Slave switching pin
-
Switching of master/slave functions on a
sampling clock signal.
H: Slave operation
L: Master operation
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/16
2010.05 - Rev.B
11 Page | ||
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