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PDF BD5426MUV Data sheet ( Hoja de datos )
| Número de pieza | BD5426MUV | |
| 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
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.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/15
2010.05 - Rev.B
1 page  
BD5426MUV
●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 MUTEX
RL =8 Ω
Pin 28
Po=500mW
fin=500Hz 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
VCCA
VHOLD
Pin 35
TM
Pin 34
Speaker
output
5V/div
5V/div
2V/div
20msec/div
VCCA
Vcc=12V
RL =8 Ω
VHOLD
Pin 35
Po=500mW TM
fin=3kHz Pin 34
Speaker
output
5V/div
5V/div
2V/div
Vcc=12V
RL =8 Ω
Po=500mW
fin=3kHz
2msec/div
Fig. 15 Wave form on Instantaneous
Power Interruption(20msec / div)
Fig. 16 Wave form on Instantaneous
Power Interruption(2msec / div)
Soft Clip
5V/div
Speaker
output
Soft Clip
200 μs ec/div
Vcc=12V
RL =8 Ω
Po=5W
THD+n=10%
fin=1kHz
R8=91k Ω
R9=22k Ω
Fig. 17 Wave form on Output Power Limiter function
(Po = 5W)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/15
2010.05 - Rev.B
5 Page 
BD5426MUV
●Explanation of Pin Functions - Continued
No. Symbol Pin voltage
Pin description
33 ROSC
5.6V
Internal PWM sampling clock frequency
setting pinUsually the pin is used open.
To adjust an internal sampling clock
frequency, connect a resister.
34 TM
0 ~ 5V
Audio muting constant setting pin
Connect a capacitor.
Technical Note
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Internal equalizing circuit
2
33
5
2
34
Instantaneous power interruption
detecting voltage setting pin
35 VHOLD 0.68×Vcc Connect a capacitor.
To adjust a detecting voltage, connect a
resister.
36 BSP2N
38, 39 VCCP2N
-
ch2 negative bootstrap pin
Connect a capacitor.
Vcc
ch2 negative power system power supply
pin
5
2
35
5
3 8 ,3 9
36
4 0 ,4 1
40, 41 OUT2N
42, 43 GNDP2
44, 45 OUT2P
46, 47 VCCP2P
Vcc ~ 0V
ch2 negative PWM signal output pin
Connect an output LPF.
0V cch2 power system GND pin
4 2 ,4 3
4 6 ,4 7
Vcc ~ 0V
Vcc
ch2 positive PWM signal output pin
Connect an output LPF.
ch2 positive power system power supply pin
1
4 4 ,4 5
1 BSP2P
-
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© 2010 ROHM Co., Ltd. All rights reserved.
ch2 positive bootstrap pin
Connect a capacitor.
11/15
4 2 ,4 3
2010.05 - Rev.B
11 Page | ||
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