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Número de pieza | BD5427MUV | |
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
BD5427MUV
No.10075EBT07
●Description
BD5427MUV 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), 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 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.
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
Rating
Unit
Conditions
Supply voltage
Power dissipation
VCC
+20
V
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47
(Note 1, 2)
3.28 W (Note 3)
Pd 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)
(Note 2)
(Note 3)
(Note 4)
A voltage that can be applied with reference to GND (pins 5, 18, 19, 42, and 43)
Pd and Tjmax=150℃ must not be exceeded.
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.
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 BD5427MUV
●Electrical characteristic curves (Reference data) – Continued
Technical Note
www.DataSheet4U.com
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 Fig. 16 Wave form on Instantaneous Power Interruption
(20msec / div)
(2msec / div)
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/15
2010.05 - Rev.B
5 Page BD5427MUV
●Explanation of Pin Functions - Continued
No. Symbol Pin voltage
Pin description
Technical Note
www.DataSheet4U.com
Internal equalizing circuit
2
Audio muting constant setting pin
34 TM 0 ~ 5V
Connect a capacitor.
34
Instantaneous power interruption detecting
voltage setting pin
35 VHOLD 0.68×Vcc Connect a capacitor.
To adjust a detecting voltage, connect a
resister.
5
2
35
5
36 BSP2N
38, 39 VCCP2N
-
ch2 negative bootstrap pin
Connect a capacitor.
Vcc ch2 negative power system power supply pin
3 8,3 9
36
4 0,4 1
40, 41 OUT2N
Vcc ~ 0V
ch2 negative PWM signal output pin
Connect an output LPF.
42, 43 GNDP2
0V cch2 power system GND pin
44, 45 OUT2P
Vcc ~ 0V
ch2 positive PWM signal output pin
Connect an output LPF.
46, 47 VCCP2P
Vcc ch2 positive power system power supply pin
4 2,4 3
4 6,4 7
1
4 4,4 5
1 BSP2P
-
ch2 positive bootstrap pin
Connect a capacitor.
4 2,4 3
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 BD5427MUV.PDF ] |
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