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PDF BD5426EFS Data sheet ( Hoja de datos )

Número de pieza BD5426EFS
Descripción 10W10W Class-D Speaker Amplifier
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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High Performance Class-D Speaker Amplifier Series
10W+10W Class-D
Speaker Amplifier for Analog Input
BD5426EFS
No.09075EAT05
Overview
BD5426EFS 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 8load). 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 8load), which is the highest grade in the industry and low heat-generation.
2) An output of 10W + 10W (13V, with 8load) is allowed without an external heat radiator.
3) Driving a lowest rating load of 6is 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.
HTSSOP-A44(5mm × 7.5mm × 1.0mm, pitch 0.8mm )
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/16
2009.06 - Rev.A

1 page




BD5426EFS pdf
BD5426EFS
Electrical characteristic curves (Reference data) – Continued
Technical Note
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MUTEX
Pin 20
10V/div
TM
Pin 26
5V/div
Speaker
Output
2V/div
10msec/div
Vcc=12V MUTEX
RL =8 Ω
Pin 20
Po=500mW
fin=500Hz TM
Pin 26
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 27
TM
Pin 26
Speaker
Output
5V/div
5V/div
2V/div
20msec/div
VCCA
Vcc=12V
VHOLD
Pin 27
RL =8 Ω
Po=500mW TM
fin=3kHz Pin 26
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 Fig. 16 Wave form on Instantaneous Power Interruption
(20msec / div)
(2msec / div)
Speaker
Output
Soft Clip
5V/div
Soft Clip
200μsec/div
Vcc=12V
RL =8 Ω
Po=5W
THD+n=10%
fin=1kHz
R2=91k Ω
R3=22k Ω
Fig. 17 Wave form on Output Power Limiter function
(Po = 5W)
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/16
2009.06 - Rev.A

5 Page





BD5426EFS arduino
BD5426EFS
Explanation of Pin Functions - Continued
No. Symbol Pin voltage
Pin description
Technical Note
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Internal equalizing circuit
40
26 TM
05V
Audio muting constant setting pin
Connect a capacitor.
26
43
40
Instantaneous power interruption detecting
voltage setting pin
27 VHOLD 0.68×Vcc Connect a capacitor.
To adjust a detecting voltage, connect a
resister.
27
43
28 BSP2N
-
ch2 negative bootstrap pin
Connect a capacitor.
2 9 ,3 0
29, 30 VCCP2N
Vcc
ch2 negative power system power supply
pin
31, 32 OUT2N
Vcc0V
ch2 negative PWM signal output pin
Connect an output LPF.
28
3 1 ,3 2
33, 34 GNDP2
0V ch2 power system GND pin
3 3 ,3 4
3 7 ,3 8
35, 36 OUT2P
37, 38 VCCP2P
Vcc0V
ch2 positive PWM signal output pin
Connect an output LPF.
39
3 5 ,3 6
Vcc ch2 positive power system power supply pin
39 BSP2P
-
ch2 positive bootstrap pin
Connect a capacitor.
3 3 ,3 4
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/16
2009.06 - Rev.A

11 Page







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