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Número de pieza | BD5427EFS | |
Descripción | Analog Input / BTL Output Class-D Speaker Amplifier | |
Fabricantes | ROHM Semiconductor | |
Logotipo | ||
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Middle Power Class-D Speaker Amplifiers
Analog Input / BTL Output
Class-D Speaker Amplifier
BD5427EFS
No.10075EBT06
●Description
BD5427EFS is a 7W + 7W 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 80% (7W + 7W output with 8Ω load).
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 14W. 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 80% (7W + 7W output with 8Ω load), which is the highest grade in the industry and low heat-generation.
2) Driving a lowest rating load of 6Ω is allowed.
3) Pop noise upon turning power on/off and power interruption has been reduced.
4) High-quality audio muting is implemented by soft-switching technology.
5) 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.
6) A master/slave function allowing synchronization of multiple devices reduces beat noises.
7) Adjustment of internal PWM sampling clock frequencies (250kHz to 400kHz) allows easy protective measures
against unwanted radio emission to AM radio band.
8) A compact back-surface heat radiation type power package is employed.
HTSSOP-A44(5mm × 7.5mm × 1.0mm, pitch 0.8mm
●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 7, 8, 15, 16, 29, 30, 37, 38, 40
(Note 1, 2)
2.0 W (Note 3)
Pd 4.5 W (Note 4)
Input voltage for signal pin
VIN -0.2 to +7.2 V Pin 1, 44 (Note 1)
Input voltage for control pin
VCONT
-0.2 to Vcc+0.2
V Pin 20, 24 (Note 1)
Input voltage for clock pin
VOSC
-0.2 to +7.2
V Pin 23 (Note 1)
Operating temperature range Topr -40 to +85 ℃
Storage temperature range
Tstg
-55 to +150
℃
Maximum junction temperature
Tjmax
+150
℃
(Note 1) A voltage that can be applied with reference to GND (pins 11, 12, 33, 34, and 43)
(Note 2) Pd and Tjmax=150℃must not be exceeded.
(Note 3) 70mm × 70mm × 1.6mm FR4 One-sided glass epoxy board (Back copper foil 0%) installed.
If used under Ta=25℃or higher, reduce 16mW for increase of every 1℃. The board is provided with thermal via.
(Note 4) 70mm × 70mm × 1.6mm FR4 Both-sided glass epoxy board (Back copper foil 100%) installed.
If used under Ta=25℃or higher, reduce 36mW 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 BD5427EFS
●Electrical characteristic curves (Reference data) – Continued
.
Technical Note
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MUTEX
Pin 20
TM
Pin 26
1 0 V/div
5 V/div
Speaker
output
2 V/div
10 m sec/div
Vcc=12V
RL = 8 Ω
Po=500m W
fin =5 0 0 H z
MUTEX
Pin 20
TM
Pin 26
Speaker
output
1 0 V/div
5 V/div
Vcc=12V
RL = 8 Ω
Po=500m W
fin = 5 0 0 H z
2 V/ div
10 m sec/div
Fig. 13 Wave form when Releasing Soft-mute
Fig. 14 Wave form when Activating Soft-mute
VCCA
VHOLD
Pin 27
TM
Pin 26
5V/div
5V/div
VCCA
Vcc=12V
RL =8 Ω
VHOLD
Pin 27
Po=500mW TM
fin=3kHz Pin 26
5V/div
5V/div
Vcc=12V
RL =8 Ω
Po=500mW
fin=3kHz
Speaker
output
2V/div
20msec/div
Fig. 15 Wave form on Instantaneous Power Interruption
(20msec / div)
Speaker
output
2V/div
2msec/div
Fig. 16 Wave form on Instantaneous Power Interruption
(2msec / div)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/15
2010.05 - Rev.B
5 Page BD5427EFS
●Explanation of Pin Functions - continued
No.
Symbol
Pin voltage
Pin description
28 BSP2N
-
ch2 negative bootstrap pin
Connect a capacitor.
29, 30 VCCP2N
31, 32
OUT2N
33, 34 GNDP2
35, 36
OUT2P
37, 38 VCCP2P
Vcc ch2 negative power system power supply pin
Vcc to 0V
ch2 negative PWM signal output pin
Connect an output LPF.
0V ch2 power system GND pin
Vcc to 0V
ch2 positive PWM signal output pin
Connect an output LPF.
Vcc ch2 positive power system power supply pin
39 BSP2P
ch2 positive bootstrap pin
-
Connect a capacitor.
40 VCCA
Vcc Analog system power pin
Technical Note
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Internal equalizing circuit
29,30
28
31,32
33,34
37,38
39
35,36
33,34
40
41
FILP
Vcc+35
12
PWM system bias pin
Connect a capacitor.
41
42 FILA
3.5V
Analog signal system bias pin
Connect a capacitor.
43 GNDA
0V Analog system power supply pin
43
40
42
43
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/15
2010.05 - Rev.B
11 Page |
Páginas | Total 16 Páginas | |
PDF Descargar | [ Datasheet BD5427EFS.PDF ] |
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