BD5426MUV-E2 [ROHM]
Analog Input / BTL Output Class-D Speaker Amplifier; 模拟量输入/输出BTL D类扬声器放大器
| 型号： | BD5426MUV-E2 |
| 厂家： | 
ROHM |
| 描述： | Analog Input / BTL Output Class-D Speaker Amplifier |
| 文件： | 总16页 (文件大小：443K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Middle Power Class-D Speaker Amplifiers
Analog Input / BTL Output
Class-D Speaker Amplifier
BD5426MUV
No.10075EBT08
●Description
BD5426MUV 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 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 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 8Ω load), which is the highest grade in the industry and low heat-generation.
2) An output of 10W + 10W (13V, with 8Ω load) is allowed without an external heat radiator.
3) Driving a lowest rating load of 6Ω is 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 (250 kHz 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.
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
Supply voltage
Symbol
VCC
Ratings
+20
Unit
V
Conditions
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47
(Note 1, 2)
3.28
4.8
W
W
(Note 3)
(Note 4)
Power dissipation
Pd
Input voltage for signal pin
Input voltage for control pin
Input voltage for clock pin
Operating temperature range
Storage temperature range
Maximum junction temperature
VIN
-0.2 ~ +7.2
-0.2 ~ VCC+0.2
-0.2 ~ +7.2
-40 ~ +85
V
V
Pin 6, 7 (Note 1)
Pin 28, 32 (Note 1)
Pin 31 (Note 1)
VCONT
VOSC
Topr
V
℃
℃
℃
Tstg
-55 ~ +150
+150
Tjmax
(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.
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
1/15
Technical Note
BD5426MUV
●Operating conditions
The following values assume Ta =25℃. Check for latest values in delivery specifications.
Parameter
Symbol
VCC
RL
Ratings
+10 ~ +16.5
6 ~ 16
Unit
V
Conditions
Supply voltage
Pin 2, 14, 15, 22, 23, 38, 39, 46, 47
(Note 5)
Load resistance
Ω
(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.
Parameter
Symbol
Limits
Unit
Conditions
Whole circuit
Circuit current 1 (Sampling mode)
ICC1
ICC2
25
10
mA
mA
With no signal
MUTEX = “L”
Circuit current 2 (Muting mode)
Control circuit
“H” level input voltage
VIH
VIL
2.3 ~ 12
0 ~ 0.8
V
V
SDX, MUTEX, MS
SDX, MUTEX, MS
“L” level input voltage
Audio circuit
Voltage gain
GV
PO1
PO2
THD
CT
28
9
dB
W
PO = 1W
Maximum output power 1 (Note 6)
Maximum output power 2 (Note 6)
Total harmonic distortion (Note 6)
Crosstalk
THD+N = 10%
10
0.1
85
80
1
W
Vcc=13V, THD+N = 10%
PO = 1W, BW=20Hz ~ 20kHz
PO = 1W, Rg = 0Ω, BW = IHF-A
%
dB
Output noise voltage (Sampling mode)
Residual noise voltage (Muting mode)
Internal sampling clock frequency
VNO
VNOM
FOSC
µVrms Rg = 0Ω, BW = IHF-A
µVrms Rg = 0Ω, BW = IHF-A, MUTEX = “L”
250
kHz
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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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
2/15
Technical Note
BD5426MUV
●Electrical characteristic curves (Reference data)
(1) Under Stereo Operation(RL=8Ω)
100
10
100
Vcc=12V
Vcc=12V
RL=8Ω
Po=1W
BW=20～20kHz
RL=8Ω
10
1
BW=20～20kHz
6kHz
1
0.1
0.01
0.1
0.01
1kHz
100Hz
0.001
0.01
0.1
1
10
100
10
100
1000
FREQUENCY (Hz)
10000
100000
OUTPUT POWER (W)
Fig. 1 THD+N - Output power
Fig. 2 THD+N - Frequency
40
0
Vcc=12V
35
30
25
20
15
10
5
L
R =8Ω
-20
-40
Po=1W
BW=20～20kHz
Vcc=12V
L
R =8Ω
Po=1W
-60
L=33µH
C=0.47µF
Cｇ=0.1µF
-80
0
-100
10
100
1000
10000
100000
10
100
1000
FREQUENCY (Hz)
10000
100000
FREQUENCY (Hz)
Fig. 3 Voltage gain - Frequency
Fig. 4
Crosstalk - Frequency
0
20
Vcc=12V
L
R =8Ω
L
R =8Ω
fin=1kHz
-20
-40
THD=10%
fin=1kHz
15
10
5
BW=20～20kHz
-60
-80
-100
0
0.001 0.01
0.1
1
10
100
8
10
12
VCC (V)
14
16
18
OUTPUT POWER (W)
Fig. 5 Crosstalk - Output power
Fig. 6 Output power - Power supply voltage
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
3/15
Technical Note
BD5426MUV
●Electrical characteristic curves (Reference data) – Continued
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
Vcc=10V
L
Vcc=12V
L
R =8Ω
fin=1kHz
R =8Ω
fin=1kHz
10
0
0
5
10
15
20
0
5
10
15
20
OUTPUT POWER (W/ch)
OUTPUT POWER (W/ch)
Fig. 7 Efficiency - Output power
Fig. 8 Efficiency - Output power
100
90
80
70
60
50
40
30
20
10
0
3
2
1
0
Vcc=16.5V
Vcc=12V
Vcc=10V
Vcc=16.5V
L
R =8Ω
RL=8Ω
fin=1kHz
fin=1kHz
0
5
10
15
20
0
5
10 15 20 25 30 35 40
TOTAL OUTPUT POWER (W)
OUTPUT POWER (W/ch)
Fig. 9 Efficiency - Output power
Fig. 10 Current consumption - Output power
100
0
R=8Ω
90
80
70
60
50
40
30
20
10
0
RL=8Ω
Without signal
VCC=12V
-20
RL=8Ω
Without signal
-40
-60
BW=20～20kHz
Sampling
-80
-100
-120
-140
Mute
10
100
1000
10000 100000
8
10
12
14
16
18
VCC (V)
FREQUENCY (Hz)
Fig. 11 Current consumption - Power supply voltage
Fig. 12 FFT of Output Noise Voltage
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
4/15
Technical Note
BD5426MUV
●Electrical characteristic curves (Reference data) – Continued
MUTEX
Pin 28
MUTEX
Pin 28
Vcc=12V
RL =8
10V/div
10V/div
5V/div
Vcc=12V
RL=8
Ω
Ω
Po=500mW
fin=500Hz
Po=500mW
fin=500Hz
TM
Pin 34
TM
Pin 34
5V/div
2V/div
2V/div
Speaker
output
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
VHOLD
Pin 35
5V/div
5V/div
5V/div
5V/div
Vcc=12V
RL =8 Ω
Vcc=12V
RL =8 Ω
Po=500mW
fin=3kHz
Po=500mW
fin=3kHz
TM
Pin 34
TM
Pin 34
2V/div
2V/div
Speaker
output
Speaker
output
20msec/div
2msec/div
Fig. 15 Wave form on Instantaneous
Power Interruption(20msec / div)
Fig. 16 Wave form on Instantaneous
Power Interruption(2msec / div)
5V/div
Vcc=12V
RL =8 Ω
Po=5W
Soft Clip
THD+n=10%
fin=1kHz
Speaker
output
R8=91k Ω
R9=22k
Ω
Soft Clip
200μsec/div
Fig. 17 Wave form on Output Power Limiter function
(Po = 5W)
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
5/15
Technical Note
BD5426MUV
●Electrical characteristic curves (Reference data) – Continued
(2) Under Stereo Operation(RL=6Ω)
25
RL=6Ω
fin=1kHz
20
THD=10%
15
10
5
0
8
10
12
14
16
18
VCC (V)
Fig. 18 Output power - Power supply voltage
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
Vcc=12V
L
R=6Ω
Vcc=10V
L
R=6Ω
fin=1kHz
fin=1kHz
0
5
10
15
20
25
0
5
10
15
20
25
OUTPUT POWER (W/ch)
OUTPUTPOWER(W/ch)
Fig. 19 Efficiency - Output power
Fig. 20 Efficiency - Output power
4
3
2
1
0
100
90
80
70
60
50
40
30
20
10
0
Vcc=16.5V
Vcc=12V
Vcc=10V
Vcc=16.5V
L
RL=6Ω
fin=1kHz
R =6Ω
fin=1kHz
0
5
10
15
20
25
0
5
10 15 20 25 30 35 40 45 50
TOTAL OUTPUT POWER (W)
OUTPUTPOWER(W/ch)
Fig. 21 Efficiency - Output power
Fig. 22 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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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
6/15
Technical Note
BD5426MUV
●Block diagram
Top View
12 11 10
9
8
7
6
5
4
3
2
1
Power Limit
N.C. 48 N.C.
47 VCCP2P
N.C. 13 N.C.
VCCP1P 14
PWM1 PWM2
VCCP1P 15
OUT1P 16
OUT1P 17
GNDP1 18
GNDP1 19
OUT1N 20
OUT1N 21
VCCP1N 22
VCCP1N 23
N.C. 24
46 VCCP2P
45 OUT2P
44 OUT2P
43 GNDP2
42 GNDP2
41 OUT2N
40 OUT2N
39 VCCP2N
38 VCCP2N
37 N.C.
DRIVER
1P
DRIVER
2P
DRIVER
1N
DRIVER
2N
Protections & Logic
Under Voltage Protection
High Temperature Protection
Output Short Protection
Output DC Voltage Protection
N.C.
N.C.
N.C. N.C.
25 26 27 28 29 30 31 32 33 34 35 36
Fig. 23 Pin Assignment Diagram
●Outer Dimensions and Inscriptions
TYPE
BD5426
Lot No.
1PIN MARK
Fig. 24 Outer Dimensions and Inscriptions of VQFN048V7070 Package
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
7/15
Technical Note
BD5426MUV
●Explanation of Pin Functions (Provided pin voltages are typical values.)
No.
2
Symbol
VCCA
Pin voltage
Vcc
Pin description
Analog system power pin
Internal equalizing circuit
2
PWM system bias pin
Connect a capacitor.
Vcc+35
12
3
3
FILP
5
2
Analog signal system bias pin
Connect a capacitor.
4
5
FILA
3.5V
4
5
Analog system GND pin
GNDA
0V
2
ch2 Analog signal input pin
ch1 Analog signal input pin
20k
6
7
IN2
IN1
3.5V
6/7
Input audio signal via a capacitor.
5
2
Voltage-to-current conversion pin for
output power limiter function
8
PLMT1
3.5V
8
5
Connect a register.
2
9
5
Current-to-voltage conversion pin for
output power limiter function
9
PLMT2
-
Connect a register.
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2010.05 - Rev.B
8/15
© 2010 ROHM Co., Ltd. All rights reserved.
Technical Note
BD5426MUV
●Explanation of Pin Functions - Continued
No.
Symbol
Pin voltage
Pin description
Internal equalizing circuit
2
Current-to-voltage conversion pin for
output power limiter function
10
10
PLMT3
-
Connect a register.
5
2
Bias pin for output power limiter function
Connect a register and a capacitor.
11
PLMT4
3.5V
11
5
ch1 positive bootstrap pin
Connect a capacitor.
14 15
,
12
BSP1P
-
12
16,17
ch1 positive power system power supply pin
14, 15
16, 17
VCCP1P
OUT1P
Vcc
ch1 positive PWM signal output pin
Connect with output LPF.
Vcc ~ 0V
18,19
22,23
ch1 power system GND pin
18, 19
20, 21
22, 23
GNDP1
OUT1N
VCCP1N
0V
Vcc ~ 0V
Vcc
25
ch1 negative PWM signal output pin
Connect with output LPF.
20,21
ch1 negative power system power supply
pin
18,19
ch1 negative bootstrap pin
Connect a capacitor
25
BSP1N
-
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2010.05 - Rev.B
9/15
© 2010 ROHM Co., Ltd. All rights reserved.
Technical Note
BD5426MUV
●Explanation of Pin Functions - Continued
No.
Symbol
Pin voltage
Pin description
Internal equalizing circuit
2
26
5
Warning output pin
2k
Pin to notify operation warning.
H: Under warning
L: Normal operation
H: 5V
L: 0V
26
WARNING
Connect a resister.
2
Error output pin
2k
A pin for notifying operation errors.
27
H: 5V
L: 0V
27
ERROR
H: Error
L: Normal operation
Connect a resister.
5
2
Audio mute control pin
1
20k
28
MUTEX
-
-
28
5
H: Mute off
L: Mute on
13, 24
29, 30
37,48
N.C. pin
N.C.
Nothing is connected with IC internal circuit.
2
Sampling clock signal input/output pin
31
31
OSC
-
When using two or more sampling clocks,
connect via a capacitor.
5
2
Master/Slave switching pin
120k
Switching of master/slave functions on a
sampling clock signal.
H: Slave operation
32
MS
-
32
5
L: Master operation
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2010.05 - Rev.B
10/15
© 2010 ROHM Co., Ltd. All rights reserved.
Technical Note
BD5426MUV
●Explanation of Pin Functions - Continued
No.
Symbol
Pin voltage
Pin description
Internal equalizing circuit
2
Internal PWM sampling clock frequency
setting pinUsually the pin is used open.
To adjust an internal sampling clock
frequency, connect a resister.
33
ROSC
5.6V
33
5
2
Audio muting constant setting pin
Connect a capacitor.
34
TM
0 ~ 5V
3 4
5
2
Instantaneous power interruption
detecting voltage setting pin
35
VHOLD
0.68×Vcc
35
Connect a capacitor.
To adjust a detecting voltage, connect a
resister.
5
3 8 ,3 9
ch2 negative bootstrap pin
Connect a capacitor.
36
BSP2N
VCCP2N
OUT2N
-
3 6
ch2 negative power system power supply
pin
38, 39
40, 41
Vcc
4 0 ,4 1
ch2 negative PWM signal output pin
Connect an output LPF.
Vcc ~ 0V
4 2 ,4 3
4 6 ,4 7
cch2 power system GND pin
42, 43
44, 45
46, 47
1
GNDP2
OUT2P
VCCP2P
BSP2P
0V
Vcc ~ 0V
Vcc
ch2 positive PWM signal output pin
Connect an output LPF.
1
4 4 ,4 5
ch2 positive power system power supply pin
ch2 positive bootstrap pin
Connect a capacitor.
-
,4 3
4 2
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2010.05 - Rev.B
11/15
© 2010 ROHM Co., Ltd. All rights reserved.
Technical Note
BD5426MUV
●Application Circuit Diagram
・Vcc=10V ~ 16.5V
R9
22kΩ
R10
22kΩ
12 11 10
9
8
7
6
5
4
3
2
1
Power Limit
N.C.
13 N.C.
14
N.C. 48 N.C.
C12
0.68μF
C1
0.68μF
VCCP1
VCCP2
47
46
PWM1 PWM2
15
C15
10μF
C46
0.1μF
C14
0.1μF
C39
+
+
L16
33μH
L44
33μH
10μF
16
45
44
43
42
41
40
39
38
37
DRIVER
1P
DRIVER
2P
17
C16
0.1μF
C44
0.1μF
C17
0.47μF
C41
0.47μF
18
19
C20
0.1μF
C40
0.1μF
SP 1ch
(8Ω)
SP 2ch
GNDP2
(8Ω)
GNDP1
20
DRIVER
1N
DRIVER
2N
Protections & Logic
33μH
L20
33μH
L40
21
Under Voltage Protection
High Temperature Protection
C22
0.1μF
C38
0.1μF
22
Output Short Protection
Output DC Voltage Protection
C36
0.68μF
23
C25
0.68μF
N.C.
N.C.
N.C.
N.C.
24
N.C. N.C.
25 26 27 28 29 30 31 32 33 34 35 36
Fig. 25 Circuit Diagram of Stereo Operation with 8Ω Load
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
12/15
Technical Note
BD5426MUV
Table 1 BOM List of Stereo Operation with 8Ω Load
Configuration
Rated
voltage
Temperature
characteristics
No. Item
Part Number
Vendor
Value
Tolerance
Quantity
Reference
mm
inch
1
2
IC BD5426MUV
ROHM
MURATA
MURATA
MURATA
Rubycon
Rubycon
MURATA
MURATA
MURATA
MURATA
SANYO
ROHM
VQFN048V7070
-
-
-
-
1
4
5
4
2
2
1
3
1
1
3
3
2
IC1
C
C
C
C
C
C
C
C
C
C
R
R
GRM219B31E684KA88
GRM188R11H104KA93
GRM21BB11H104KA01
25ST225M3216
2012
1608
2012
3225
3225
2012
1608
2012
2012
6666
1005
1005
0805
0603
0805
1210
1210
0805
0603
0805
0805
2626
0402
0402
0.68µF
0.1µF
0.1µF
2.2µF
0.47µF
3.3µF
0.1µF
1µF
25V
50V
50V
25V
50V
25V
25V
16V
16V
25V
50V
50V
±10%
±10%
±10%
±20%
±20%
±10%
±10%
±10%
±10%
±20%
±1%
±10%
C1, C12, C25, C36
C5, C14, C22, C38, C46
C16, C20, C40, C44
C6, C7
3
±15%
4
±10%
5
±5%
6
50ST474M3225
±5%
C17, C41
7
GRM21BB31E335KA75
GRM188B11E104KA01
GRM21BB11C105KA01
GRM21BB31C106KE15
25SVPD10M
±10%
C35
8
±10%
C11, C31, C34
C3
9
±10%
10
11
12
13
10µF
10µF
22kΩ
100kΩ
±10%
C4
±25%
C2, C15, C39
R8, R9, R10
R26, R27
MCR01MZPF2202
±200ppm/℃
±200ppm/℃
MCR01MZPF1003
ROHM
±1%
Configuration
mm
DC
Resistance
Rated
DC Current
No. Item
Part Number
7G09B-330M
Vendor
Value
Tolerance
±20%
Quantity
2
Reference
14
L
SAGAMI
10×9×10
33µH×2
44mΩmax.
4.1A max.
L16, L20, L40, L44
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
13/15
Technical Note
BD5426MUV
●Notes for use
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.
Tjmax - Ta
Tjmax: Maximum temperature junction = 150[℃]
Ta: Operating ambient temperature [℃]
θja: Package thermal resistance [℃/W]
Po: Output power [W]
Pd
〔W〕
Maximum power dissipation
ja
θ
-1
1
diss
P
O
P
〔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 IC when installing it onto the board. Faulty installation may destroy the
IC when the device is energized. In addition, a foreign matter getting in between IC pins, pins and power supply, and
pins and GND may cause shorting and destruction of the IC.
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 13, 24, 29, 30, 37, and48)
The N.C. (Non connection) pins are not connected with an internal circuit. Leave the pins open or connect them to GND.
www.rohm.com
2010.05 - Rev.B
14/15
© 2010 ROHM Co., Ltd. All rights reserved.
Technical Note
BD5426MUV
●Ordering part number
B
D
- E
2
5
4
2
6
M U
V
Part No
Part No.
Package
MUV: VQFN048V7070
Packaging and forming specification
E2: Embossed tape and reel
VQFN048V7070
<Tape and Reel information>
7.0 0.1
Tape
Embossed carrier tape
1500pcs
Quantity
E2
Direction
of feed
1PIN MARK
The direction is the 1pin of product is at the upper left when you hold
reel on the left hand and you pull out the tape on the right hand
(
)
S
0.08
S
4.7 0.1
C0.2
1
12
13
48
37
24
25
36
Direction of feed
1pin
+0.05
0.75
0.25
-0.04
0.5
Reel
(Unit : mm)
Order quantity needs to be multiple of the minimum quantity.
∗
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.05 - Rev.B
15/15
Notice
N o t e s
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
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
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
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
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, commu-
nication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
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
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-
controller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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© 2010 ROHM Co., Ltd. All rights reserved.
R1010
A
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