Middle Power Class-D Speaker Amplifiers
Analog Input /
Single End Output
Class-D Speaker Amplifier
BD5445EFV
No.10075EBT16
●Overview
BD5445EFV is a Analog input type Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving
and low-power consumption, delivers an output power of 17W+17W. This 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 can achieve high efficiency of 91% (10W+10W output with
8Ω load).In addition, the IC is packaged in a compact reverse heat radiation type power package to achieve low power
consumption and low heat generation and eliminates necessity of external heat-sink up to a total output power of 34W. This
product satisfies both needs for drastic downsizing, low-profile structures and powerful, high-quality playback of sound
system.
●Features
1) 17W stereo single-ended outputs
34W mono bridge-tied-load output
2) Wide supply voltage (From 10V to 27V)
3) Four selectable gain (14, 20, 26, 32dB)
4) Master / Slave function
5) Soft-start and Soft-mute
6) Low noise, Low distortion
7) Various protection functions
(High temperature, Output short, Under voltage)
8) Small power package (HTSSOP-B28)
●Applications
Flat Panel TVs (LCD, Plasma), Home Audio, Desktop PC, Amusement equipments, Electronic Music equipments, etc.
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© 2010 ROHM Co., Ltd. All rights reserved.
1/31
2010.05 - Rev.B
BD5445EFV
●Absolute
maximum ratings (Ta=25℃)
Item
Supply voltage
Power dissipation
Input voltage for signal
Input voltage for control
Input voltage for clock
Operating temperature range
Storage temperature range
Maximum junction temperature
Technical Note
Symbol
Vcc
Pd
V
IN
V
CONT
V
OSC
T
opr
T
stg
T
jmax
Limit
30
1.45
3.30
4.70
-0.3
½
5.3
-0.3
½
Vcc + 0.3
-0.3
½
5.3
-25
½
+85
-55
½
+150
+150
Unit
V
W
W
W
V
V
V
℃
℃
℃
Conditions
Pin 1, 15, 16, 27, 28
Pin 4, 5
Pin 2, 3, 10, 11, 13
Pin 12
※1 ※2
※3
※4
※5
※1
※1
※1
※1
The voltage that can be applied, based on Gnd(Pin6, 20, 21, 22, 23)
※2
Do not, however exceed Pd and Tjmax=150℃.
※3
70mm×70mm×1.6mm, FR4, 1-layer glass epoxy board (Copper on bottom layer 0%)
Derating in done at 11.6mW/℃ for operating above Ta＝25℃.
※4
70mm×70mm×1.6mm, FR4, 2-layer glass epoxy board (Copper on bottom layer 100%)
Derating in done at 26.4mW/℃ for operating above Ta＝25℃. There are thermal via on the board.
※5
70mm×70mm×1.6mm, FR4, 4-layer glass epoxy board (Copper on bottom layer 100%)
Derating in done at 37.6mW/℃ for operating above Ta＝25℃. There are thermal via on the board.
●Operating
conditions (Ta＝25℃)
Item
Supply voltage
Minimum load impedance
※6
※
Do not, however exceed Pd.
No radiation-proof design
Symbol
Vcc
R
L
Limit
10
½
27
3.6
Unit
V
Ω
Conditions
Pin 1, 15, 16, 27, 28
※1 ※2
※6
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© 2010 ROHM Co., Ltd. All rights reserved.
2/31
2010.05 - Rev.B
BD5445EFV
Technical Note
●Electrical
characteristics
（
Unless otherwise specified Ta=25℃, Vcc=24V, f=1kHz, R
L
=8Ω, Po=1W, Gain=20dB,
PDX=24V, MUTEX=24V, MS=0V, Single-ended outputs）
Limit
Item
Symbol
Unit
Conditions
Min
Typ
Max
Whole circuit
Pin 1, 15, 16, 27, 28
Circuit current 1
I
CC1
-
25
50
mA
No load, No signal
Pin 1, 15, 16, 27, 28
Circuit current 2
I
CC2
-
2
4
mA
PDX=0V,MUTEX=0V, No load, No
(Power down mode)
signal
Control circuit
Pin 2, 3, 10, 11, 13
High level input voltage for control
V
IH
2.5
-
24
V
Low level input voltage for control
High level input voltage for clock
Low level input voltage for clock
Audio circuit
Momentary maximum output power
P
O1
P
O2
G
V0
G
V1
G
V2
G
V3
THD
CT
V
NO
-
-
12
18
24
30
-
60
-
10
17
14
20
26
32
0.05
75
80
-
-
16
22
28
34
-
-
160
W
R
L
=8Ω, THD+n=10%
R
L
=4Ω, THD+n=10%
Gain1=0V, Gain0=0V
Gain1=0V, Gain0=24V
Gain1=24V, Gain0=0V
Gain1=24V, Gain0=24V
BW=20½20kHz
Rg=0Ω, BW=IHF-A
※7
Rg=0Ω, BW=IHF-A
※7
PDX=0V, MUTEX=0V
Rg=0Ω, BW=IHF-A
※7
G
VM
PSRR
F
OSC
F
EXT
80
-
480
480
94
60
600
-
-
-
720
720
dB
dB
kHz
kHz
MUTEX=0V, BW= IHF-A
※7
Vripple=1Vrms, BW= IHF-A
Rg=0Ω, fripple=100Hz
Pin 12, MS=0V
Pin 12, MS=24V
※7
※7
※7
※7
※7
※7
※7
※7
※7
※7
V
IL
V
IHC
V
ILC
0
2.5
0
-
-
-
0.8
5
0.8
V
V
V
Pin 2, 3, 10, 11, 13
Pin 12
Pin 12
Voltage gain
dB
Total harmonic distortion
Crosstalk
Output noise voltage
Residual noise voltage
(Power down mode)
Mute attenuation
Power supply rejection ratio
Internal oscillation frequency
External clock frequency
%
dB
μVrms
V
NOR
-
1
10
μVrms
※7
These items show the typical performance of device and depend on board layout, parts, power supply.
The standard value is in mounting device and parts on surface of ROHM’s board directly.
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© 2010 ROHM Co., Ltd. All rights reserved.
3/31
2010.05 - Rev.B
BD5445EFV
●Typical
Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board.
Technical Note
3
RL=8Ω
No Signal
PDX=MUTEX=L
40
35
30
25
Icc (mA)
2.5
2
Icc (mA)
RL=8Ω
No Signal
PDX=MUTEX=H
1.5
20
15
10
1
0.5
5
0
8
10
12
14
16
18
20
22
24
26
28
30
0
Vcc (V)
8
10
12
14
16
18
20
22
24
26
28
30
Vcc (V)
Fig. 1 Power supply voltage－Current consumption
Fig. 2 Power supply voltage－Current consumption
100
Vcc=24V
RL=8Ω
BW=20½20kHz
100
10
10
THD+N(%)
THD+N(%)
1
6kHz
0.1
1
1kHz
100Hz
0.1
0.01
0.001
0.01
0.01
0.1
1
10
100
10
100
1000
FREQUENCY(Hz)
10000
100000
OUTPUT POWER(W)
Fig.3 Output power－THD+N
Fig.4
Frequency－THD+N
0
-10
-20
-30
CROSSTALK(dB)
0
Vcc=24V
RL=8Ω
fin=1kHz
BW=20½20kHz
CROSSTALK(dB)
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Vcc=24V
RL=8Ω
Po=1W
BW=20½20kHz
-40
-50
-60
-70
-80
-90
-100
0.001
0.01
0.1
1
10
100
10
100
1000
FREQUENCY(Hz)
10000
100000
OUTPUT POWER(W)
Fig.5 Output power－Crosstalk
Fig.6 Frequency－Crosstalk
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© 2010 ROHM Co., Ltd. All rights reserved.
4/31
2010.05 - Rev.B
BD5445EFV
●Typical
Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board.
Technical Note
40
35
30
VOLTAGE GAIN(dB)
0
Gain=38dB
Gain=32dB
-20
-40
NOISE FFT(dBV)
25
20
15
10
5
0
-5
-10
10
100
1000
FREQUENCY(Hz)
Gain=26dB
Gain=20dB
-60
-80
-100
-120
-140
Vcc=24V
RL=8Ω
No Signal
BW=20½20kHz
Vcc=24V
RL=8Ω
Po=1W
L=47uH
C=0.39uF
10000
100000
10
100
1000
FREQUENCY(Hz)
10000
100000
Fig.7 Frequency－Voltage gain
Fig.8 FFT of Output Noise Voltage
Vcc=24V
Gain=20dB
FILP=22uF
10V/div.
Speaker
Output
Vcc=24V
Gain=20dB
FILP=22uF
10V/div.
Speaker
Output
FILP
2V/div.
PDX
10V/div.
50ms/div.
10V/div.
PDX
50ms/div.
2V/div.
FILP
Fig.9
Waveform when releasing Power-down
Fig.10
Waveform when activating Power-down
Vcc=24V
Po=1W
fin=200Hz
Speaker
Output
Speaker
Output
Vcc=24V
Po=1W
fin=200Hz
2V/div.
2V/div.
MUTEX
10V/div.
10ms/div.
10V/div.
10ms/div.
MUTEX
Fig.11 Waveform when releasing Soft-mute
Fig.12
Waveform when activating Soft-mute
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© 2010 ROHM Co., Ltd. All rights reserved.
5/31
2010.05 - Rev.B
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