ROHM BD5427MUV

High Performance Class-D Speaker Amplifier Series
7W+7W Class-D
Speaker Amplifier for Analog Input
No.09075EAT07
BD5427MUV
●Overview
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
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© 2009 ROHM Co., Ltd. All rights reserved.
1/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●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.
Item
Symbol
Supply voltage
Power dissipation
Rating
VCC
Pd
Unit
Conditions
+20
V
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47 (Note 1, 2)
3.28
W
(Note 3)
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) 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.
●Operating Conditions
The following values assume Ta =25℃. Check for latest values in delivery specifications.
Symbol
Rating
Unit
Item
Conditions
Supply voltage
VCC
+10～+16.5
V
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47
Load resistance
RL
6 ～ 16
Ω
(Note 5)
(Note 5) Pd should not be exceeded.
●Electrical Characteristics
Except otherwise specified Ta = 25℃, VCC = 12V, fIN = 1kHz, Rg = 0Ω, RL = 8Ω、MUTEX="H", MS="L"
For latest values, refer to delivery specifications.
Representative
Symbol
Unit
Conditions
Item
value
Whole circuit
Circuit current 1 (Sampling mode)
ICC1
25
mA
With no signal
Circuit current 2 (Muting mode)
ICC2
10
mA
MUTEX = “L”
“H” level input voltage
VIH
2.3～12
V
MUTEX, MS
“L” level input voltage
VIL
0～0.8
V
MUTEX, MS
GV
28
dB
PO = 1W
Control circuit
Audio circuit
Voltage gain
Maximum output power (Note 6)
PO
7
W
THD+N = 10%
Total harmonic distortion (Note 6)
THD
0.1
%
PO = 1W, BW=20Hz～20kHz
CT
85
dB
PO = 1W, Rg = 0Ω, BW = IHF-A
Output noise voltage (Sampling mode)
VNO
80
µVrms
Rg = 0Ω, BW = IHF-A
Residual noise voltage (Muting mode)
VNOM
1
µVrms
Rg = 0Ω, BW = IHF-A, MUTEX = “L”
Internal sampling clock frequency
FOSC
250
kHz
Crosstalk
MS = “L” (In master operation)
(Note 6) The rated values of items above indicate average performances of the device, which largely depend on circuit layouts, components, and power supplies.
The reference values are those applicable to the device and components directly installed on a board specified by us.
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© 2009 ROHM Co., Ltd. All rights reserved.
2/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Electrical characteristic curves (Reference data)
(1) Under Stereo Operation（RL=8Ω）
100
6kHz
1
100Hz
0.01
0.001
0.01
1
0.1
1kHz
0.1
Vcc=12V
RL=8Ω
Po=1W
BW=20～20kHz
10
THD+N (%)
10
THD+N (%)
100
Vcc=12V
RL=8Ω
BW=20～20kHz
0.1
1
OUTPUT POWER (W)
0.01
10
10
100
10000
100000
Fig. 2 THD+N － Frequency
0
40
35
Vcc=12V
RL=8Ω
Po=1W
BW=20～20kHz
-20
25
CROSSTALK (dB)
30
Vcc=12V
RL=8Ω
Po=1W
L=33µH
C=0.47µF
Cｇ=0.1µF
20
15
10
5
0
-40
-60
-80
-100
10
100
1000
10000
10
100000
100
Fig. 3 Voltage gain - Frequency
Fig. 4
20
0
-40
OUTPUT POWER (W)
Vcc=12V
RL=8Ω
fin=1kHz
BW=20～20kHz
-20
-60
-80
-100
0.001
0.01
0.1
1
10
100
Fig. 5 Crosstalk - Output power
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10000
100000
Crosstalk - Frequency
RL=8Ω
fin=1kHz
THD=10%
15
10
5
0
8
OUTPUT POWER (W)
© 2009 ROHM Co., Ltd. All rights reserved.
1000
FREQUENCY (Hz)
FREQUENCY (Hz)
CROSSTALK (dB)
1000
FREQUENCY (Hz)
Fig. 1 THD+N － Output power
VOLTAGE GAIN (dB)
100
10
12
14
VCC (V)
16
18
Fig. 6 Output power - Power supply voltage
3/15
2009.06 - Rev.A
Technical Note
BD5427MUV
100
90
80
70
60
50
40
30
20
10
0
Vcc=10V
RL=8Ω
fin=1kHz
0
5
10
OUTPUT POWER (W/ch)
Fig. 7 Efficiency - Output power
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
15
Vcc=12V
RL=8Ω
fin=1kHz
0
5
10
OUTPUT POWER (W/ch)
Fig. 8 Efficiency - Output power
Vcc=16.5V
2
Vcc=12V
Vcc=10V
1
Vcc=16.5V
RL=8Ω
fin=1kHz
RL=8Ω
fin=1kHz
0
0
5
10
0
15
5
Fig. 9 Efficiency - Output power
100
90
80
70
60
50
40
30
20
10
0
10
15
20
25
30
35
40
TOTAL OUTPUT POWER (W)
OUTPUT POWER (W/ch)
Fig. 10 Current consumption - Output power
0
RL=8Ω
無信号時
Without
signal
Vcc=12V
RL=8Ω
Without
signal
無信号時
BW=20～20kHz
-20
NOISE FFT (dBV)
ICC (mA)
15
3
ICC (A)
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
●Electrical characteristic curves (Reference data) – Continued
Sampling
Mute
-40
-60
-80
-100
-120
-140
8
10
12
14
VCC (V)
16
10
18
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1000
10000
100000
FREQUENCY (Hz)
Fig. 11 Current consumption - Power supply voltage
© 2009 ROHM Co., Ltd. All rights reserved.
100
4/15
Fig. 12 FFT of Output Noise Voltage
2009.06 - Rev.A
Technical Note
BD5427MUV
●Electrical characteristic curves (Reference data) – Continued
MUTEX
Pin 28
10V/div
TM
Pin 34
5V/div
MUTEX
Vcc=12V
Pin 28
RL =8 Ω
Po=500m W
fin=500Hz
TM
Pin 34
2V/div
Speaker
output
10V/div
5V/div
Vcc=12V
RL =8 Ω
Po=500mW
fin=500Hz
2V/div
Speaker
output
10msec/div
10msec/div
Fig. 13 Wave form when Releasing Soft-mute
Fig. 14 Wave form when Activating Soft-mute
VCCA
VCCA
VHOLD
Pin 35
5V/div
VHOLD
Pin 35
TM
Pin 34
5V/div
Speaker
output
2V/div
5V/div
2V/div
2msec/div
Fig. 15 Wave form on Instantaneous Power Interruption
(20msec / div)
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Vcc=12V
RL =8 Ω
Po=500mW
fin=3kHz
Speaker
output
20msec/div
© 2009 ROHM Co., Ltd. All rights reserved.
5V/div
Vcc=12V
RL =8 Ω
Po=500m W
TM
fin=3kHz
Pin 34
5/15
Fig. 16 Wave form on Instantaneous Power Interruption
(2msec / div)
2009.06 - Rev.A
Technical Note
BD5427MUV
●Electrical characteristic curves (Reference data)
(2) Under Stereo Operation（RL=6Ω）
OUTPUT POWER (W)
25
RL=6Ω
fin=1kHz
THD=10%
20
15
10
5
0
8
10
12
14
VCC (V)
16
18
Vcc=10V
RL=6Ω
fin=1kHz
0
5
10
15
OUTPUT POWER (W/ch)
Fig. 18
EFFICIENCY (%)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
20
Vcc=12V
RL=6Ω
fin=1kHz
0
5
10
15
OUTPUT POWER (W/ch)
Efficiency - Output power
100
90
80
70
60
50
40
30
20
10
0
Fig. 19
20
Efficiency - Output power
4
3
Vcc=16.5V
Vcc=12V
ICC (A)
EFFICIENCY (%)
Fig. 17 Output power - Power supply voltage
Vcc=16.5V
RL=6Ω
fin=1kHz
2
Vcc=10V
RL=6Ω
fin=1kHz
1
0
0
5
10
15
OUTPUT POWER (W/ch)
Fig. 20
20
0
5
10
15
20
25
30
35
40
TOTAL OUTPUT POWER (W)
Efficiency - Output power
Fig. 21 Current consumption - Output power
Dotted lines of the graphs indicate continuous output power to be obtained on musical signal source or by installing
additional heat sinks.
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© 2009 ROHM Co., Ltd. All rights reserved.
6/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Pin Assignment
IN1
IN2
GNDA
FILA
FILP
VCCA
BSP2P
6
5
4
3
2
1
N.C. 13 N.C.
FILP
Power Limit
FILA
10
VCCA
N.C.
7
N.C.
11
GNDA
N.C.
8
N.C.
N.C.
9
N.C.
N.C.
12
N.C.
BSP1P
Top View
N.C. 48
N.C.
VCCP1P
14
VCCP1P
15
OUT1P
16
OUT1P
17
GNDP1
18
43 GNDP2
GNDP1
19
42 GNDP2
OUT1N
20
OUT1N
21
VCCP1N
22
VCCP1N
23
46 VCCP2P
PWM1 PWM2
DRIVER
1P
45 OUT2P
DRIVER
2P
DRIVER
1N
44 OUT2P
41 OUT2N
DRIVER
2N
Protections & Logic
40 OUT2N
Under Voltage Protection
High Temperature Protection
39 VCCP2N
Output Short Protection
Output DC Voltage Protection
Ramp
Generator
SOFT
MUTE
Power-Off
Detector
28
29
30
31
32
33
34
35
36
ERROR
MUTEX
N.C.
N.C.
OSC
MS
ROSC
TM
VHOLD
BSP2N
Mute
Control
Clock
Control
27
24 N.C.
ERROR
26
WARNING
25
WARNING
38 VCCP2N
BSP1N
N.C.
47 VCCP2P
N.C. 37
N.C.
N.C. N.C.
Fig. 22 Pin Assignment Diagram
●Outer Dimensions and Inscriptions
Type
BD5427
Lot No.
Fig. 23 Outer Dimensions and Inscriptions of VQFN048V7070 Package
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© 2009 ROHM Co., Ltd. All rights reserved.
7/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Explanation of Pin Functions (Provided pin voltages are typical values.)
No.
Symbol
Pin voltage
2
VCCA
Vcc
Internal equalizing circuit
Pin description
Analog system power pin
2
3
FILP
Vcc+35
12
PWM system bias pin
3
Connect a capacitor.
5
2
Analog signal system bias pin
4
FILA
3.5V
4
Connect a capacitor.
5
5
GNDA
0V
Analog system GND pin
2
6
7
IN2
IN1
3.5V
ch2 Analog signal input pin
ch1 Analog signal input pin
6/7
20k
Input audio signal via a capacitor.
5
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© 2009 ROHM Co., Ltd. All rights reserved.
8/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Explanation of Pin Functions - Continued
No.
Symbol
Pin voltage
12
BSP1P
-
Internal equalizing circuit
Pin description
1 4,1 5
ch1 positive bootstrap pin
Connect a capacitor.
12
14, 15
VCCP1P
Vcc
16, 17
OUT1P
Vcc～0V
ch1 positive power system power supply pin
1 6,1 7
ch1 positive PWM signal output pin
Connect with output LPF.
1 8 ,1 9
18, 19
GNDP1
0V
ch1 power system GND pin
2 2 ,2 3
20, 21
OUT1N
Vcc～0V
ch1 negative PWM signal output pin
Connect with output LPF.
25
2 0 ,2 1
22, 23
VCCP1N
Vcc
25
BSP1N
-
ch1 negative power system power supply
pin
ch1 negative bootstrap pin
Connect a capacitor
1 8 ,1 9
2
Warning output pin
26
WARNING
H: 5V
L: 0V
Pin to notify operation warning.
H: Under warning
L: Normal operation
2k
26
Connect a resister.
5
2
Error output pin
27
ERROR
H: 5V
L: 0V
A pin for notifying operation errors.
H: Error
L: Normal operation
2k
27
Connect a resister.
5
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© 2009 ROHM Co., Ltd. All rights reserved.
9/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Explanation of Pin Functions - Continued
No.
Symbol
Pin voltage
Internal equalizing circuit
Pin description
2
Audio mute control pin
MUTEX
-
H: Mute off
L: Mute on
80k
28
120k
28
5
8, 9
10, 11
13, 24
29, 30
37, 48
N.C.
-
N.C. pin
Nothing is connected with IC internal circuit.
Sampling clock signal input/output pin
31
OSC
-
When using two or more sampling clocks,
connect via a capacitor.
2
Master/Slave switching pin
MS
-
120k
Switching of master/slave functions on a
sampling clock signal.
H: Slave operation
L: Master operation
32
80k
32
5
2
Internal PWM sampling clock frequency
setting pin
33
ROSC
5.6V
20k
6/7
Usually the pin is used open.
To adjust an internal sampling clock
frequency, connect a resister.
5
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© 2009 ROHM Co., Ltd. All rights reserved.
10/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Explanation of Pin Functions - Continued
No.
Symbol
Pin voltage
Pin description
Internal equalizing circuit
2
Audio muting constant setting pin
34
TM
34
0～5V
Connect a capacitor.
5
180k
2
Instantaneous power interruption detecting
voltage setting pin
VHOLD
0.68×Vcc
35
Connect a capacitor.
To adjust a detecting voltage, connect a
resister.
390k
35
5
36
BSP2N
-
ch2 negative bootstrap pin
Connect a capacitor.
3 8 ,3 9
36
38, 39
VCCP2N
Vcc
40, 41
OUT2N
Vcc～0V
ch2 negative power system power supply
pin
4 0 ,4 1
ch2 negative PWM signal output pin
Connect an output LPF.
4 2 ,4 3
42, 43
GNDP2
0V
cch2 power system GND pin
4 6 ,4 7
44, 45
OUT2P
Vcc～0V
ch2 positive PWM signal output pin
Connect an output LPF.
1
4 4 ,4 5
46, 47
VCCP2P
Vcc
1
BSP2P
-
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© 2009 ROHM Co., Ltd. All rights reserved.
ch2 positive power system power supply pin
ch2 positive bootstrap pin
Connect a capacitor.
11/15
4 2 ,4 3
2009.06 - Rev.A
Technical Note
BD5427MUV
●Application Circuit Diagram
VCCP1
C12
0.68μF
N.C.
V CC A
C3
1μF
3
2
1
V CC A
4
0.1μF
C5
+
2.2μF
C2
10μF
5
FIL P
N.C.
GND A
N.C.
6
C4
10μF
N.C.
7
FIL A
8
SP INPUT 2 ch
N.C.
9
GNDA
N.C.
10
C6
N.C.
11
C7
N.C.
12
N.C.
2.2μF
SP INPUT 1 ch
・Vcc=10V～16.5V
13 N.C.
N.C. 48
14
C15
10μF +
C17
0.47μF
SP 1 ch
(8 Ω )
GNDP 1
L16
33μH
C14
0.1μF
15
PWM 1
C22
0.1μF
DRIVER
2P
44
43
19
42
DRIVER
1N
40
Under Voltage Protection
High Temperature Protection
22
C44
0.1μF
C40
0.1μF
C38
0.1μF
Power-Off
Detector
34
35
+ C39
10μF
C41
0.47μF
GNDP 2
SP 2 ch
(8 Ω )
33μH
L40
N.C. 37 N.C.
36
3.3μF
C35
C34
C36
0.68μF
GNDD
SL A VE
M AS TER
0.1μF
SOFT
MUTE
33
OPEN
32
38
Ramp
Generator
Clo ck
Con t rol
C AREER I / O
R27
100kΩ
31
0.1μF
30
C31
N.C.
29
N.C.
N.C.
N.C.
ERROR
28
MUTEX
WARNING OUT PUT
GNDD
27
GNDD
26
R26
100kΩ
25
ERROR OUTPUT
N.C.
Mute
Control
23
N.C. 24
VCCP2
39
Output Short Protection
Output DC Voltage Protection
WARNING
C25
0.68μF
L44
33μH
41
DRIVER
2N
Protections & Logic
21
C46
0.1μF
45
18
20
33μH
L20
46
PWM 2
DRIVER
1P
17
C20
0.1μF
C1
0.68μF
47
16
C16
0.1μF
N.C.
Fig. 24 Circuit Diagram of Stereo Operation with 8Ω Load
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© 2009 ROHM Co., Ltd. All rights reserved.
12/15
2009.06 - Rev.A
Technical Note
BD5427MUV
Table 1 BOM List of Stereo Operation with 8Ω Load
Configuration
No.
Item
Part Number
Vendor
mm
ROHM
Value
Rated
voltage
Tolerance
Temperature
characteristics
Quantity
-
-
-
-
1
inch
VQFN048V7070
Reference
1
IC
BD5427MUV
2
C
GRM219B31E684KA88
MURATA
2012
0805
0.68µF
25V
±10%
±10%
4
C1, C12, C25, C36
3
C
GRM188R11H104KA93
MURATA
1608
0603
0.1µF
50V
±15%
±15%
5
C5, C14, C22, C38, C46
4
C
GRM21BB11H104KA01
MURATA
2012
0805
0.1µF
50V
±10%
±10%
4
C16, C20, C40, C44
5
C
25ST225M3225
Rubycon
3225
1210
2.2µF
25V
±20%
±5%
2
C6, C7
6
C
50ST474M3225
Rubycon
3225
1210
0.47µF
50V
±20%
±5%
2
C17, C41
7
C
GRM21BB31E335KA75
MURATA
2012
0805
3.3µF
25V
±10%
±10%
1
C35
8
C
GRM188B11E104KA01
MURATA
1608
0603
0.1µF
25V
±10%
±10%
2
C31, C34
9
C
GRM21BB11C105KA01
MURATA
2012
0805
1µF
16V
±10%
±10%
1
C3
10
C
GRM21BB31C106KE15
MURATA
2012
0805
10µF
16V
±10%
±10%
1
C4
11
C
25SVPD10M
SANYO
6666
2626
10µF
25V
±20%
±25%
3
C2, C15, C39
12
R
MCR01MZPF1003
ROHM
1005
0402
100kΩ
50V
±1%
±200ppm/℃
2
R26, R27
No.
Item
Part Number
Vendor
Value
Tolerance
DC
Resistance
Rated
DC Current
Quantity
13
L
33µH×2
±20%
52mΩmax.
2.0A max.
2
Configuration
7G09B-330M
SAGAMI
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© 2009 ROHM Co., Ltd. All rights reserved.
mm
10×9×10
13/15
IC1
Reference
L16, L20, L40, L44
2009.06 - Rev.A
Technical Note
BD5427MUV
●Ordering part number
1. About absolute maximum ratings
If an applied voltage or an operating temperature exceeds an absolute maximum rating, it may cause destruction of a
device. A result of destruction, whether it is short mode or open mode, is not predictable. Therefore, provide a physical
safety measure such as fuse, against a special mode that may violate conditions of absolute maximum ratings.
2. About power supply line
As return of current regenerated by back EMF of output coil happens, take steps such as putting capacitor between
power supply and GND as a electric pathway for the regenerated current. Be sure that there is no problem with each
property such as emptied capacity at lower temperature regarding electrolytic capacitor to decide capacity value. If the
connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage
on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute
maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp
diode between the power supply and GND pins.
3. Potential of GND (5, 18, 39, 42, and 43 pins)
Potential of the GND terminal must be the lowest under any operating conditions.
4. About thermal design
Perform thermal design with sufficient margins, in consideration of maximum power dissipation Pd under actual operating
conditions. This product has an exposed frame on the back of the package, and it is assumed that the frame is used with
measures to improve efficiency of heat dissipation. In addition to front surface of board, provide a heat dissipation pattern
as widely as possible on the back also.
A class-D power amplifier has heat dissipation efficiency far higher than that of conventional analog power amplifier and
generates less heat. However, extra attention must be paid in thermal design so that a power dissipation Pdiss should
not exceed the maximum power dissipation Pd.
T jmax - Ta
Tjmax: Maximum temperature junction = 150[℃]
Pd 
〔W〕
Maximum power dissipation
Ta: Operating ambient temperature [℃]
θja
θja: Package thermal resistance [℃/W]


 1

Po: Output power [W]
diss
O
P
P
1

〔W〕


Power dissipation
 η



η: Efficiency
5. About operations in strong electric field
Note that the device may malfunction in a strong electric field.
6. Thermal shutdown (TSD) circuit
This product is provided with a built-in thermal shutdown circuit. When the thermal shutdown circuit operates, the output
transistors are placed under open status. The thermal shutdown circuit is primarily intended to shut down the IC avoiding
thermal runaway under abnormal conditions with a chip temperature exceeding Tjmax = 150℃, and is not intended to protect
and secure an electrical appliance. Accordingly, do not use this circuit function to protect a customer's electrical appliance.
7. About shorting between pins and installation failure
Be careful about direction and displacement of an LSI when installing it onto the board. Faulty installation may destroy
the LSI when the device is energized. In addition, a foreign matter getting in between LSI pins, pins and power supply,
and pins and GND may cause shorting and destruction of the LSI.
8. About power supply startup and shutdown
When starting up a power supply, be sure to place the MUTEX pin (pin 28) at “L” level. When shutting down a power
supply also, be sure to place the pin at “L” level. Those processes reduce pop noises generated upon turning on and off
the power supply. In addition, all power supply pins must be started up and shut down at the same time.
9. About WARNING output pin (pin 26) and ERROR output pin (pin 27)
A WARNING flag is output from the WARNING output pin upon operation of the high-temperature protection function and
under-voltage protection function. And an ERROR flag is output from the ERROR output pin upon operation of VCC/GND
shorting protection function and speaker DC voltage applying protection function. These flags are the function which the
condition of this product is shown in. The use which aimed at the protection except for this product is prohibition.
10. About N.C. pins (pins 8, 9, 10, 11, 13, 24, 29, 30, 37, and 48)
The N.C. (Non connection) pins are not connected with an internal circuit. Leave the pins open or connect them to GND.
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14/15
2009.06 - Rev.A
Technical Note
BD5427MUV
●Ordering part number
B
D
5
Part No
BD.
4
2
7
M
Part No.
5427
U
V
Package
MUV: VQFN048V7070
-
E
2
Packaging and forming specification
E2: Embossed tape and reel
VQFN048V7070
<Tape and Reel information>
7.0±0.1
7.0 ± 0.1
1.0MAX
4.7 ± 0.1
1
12
1500pcs
E2
The direction is the 1pin of product is at the upper left when you hold
)
(0.22)
( reel on the left hand and you pull out the tape on the right hand
13
4.7±0.1
0.4±0.1
48
+0.03
0.02 -0.02
S
C0.2
Embossed carrier tape
Quantity
Direction
of feed
1PIN MARK
0.08 S
Tape
37
24
36
0.75
0.5
25
+0.05
0.25 -0.04
1pin
(Unit : mm)
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© 2009 ROHM Co., Ltd. All rights reserved.
Reel
15/15
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2009.06 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
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The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
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which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
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The Products specified in this document are intended to be used with general-use electronic
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While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
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R0039A