ROHM BD5445EFV Technical data

Middle Power Class-D Speaker Amplifiers

Analog Input / Single End Output Class-D Speaker Amplifier

BD5445EFV

No.11075ECT16

●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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2011.10 - Rev.C

BD5445EFV

●Absolute maximum ratings (Ta=25℃)

Item Symbol Limit Unit Conditions

Supply voltage Vcc 30 V Pin 1, 15, 16, 27, 28 ※1 ※2

1.45 W ※3

Power dissipation Pd

3.30 W ※4

4.70 W ※5

Input voltage for signal VIN -0.3 ～ 5.3 V Pin 4, 5 ※1

Input voltage for control V

Input voltage for clock V

-0.3 ～ Vcc + 0.3 V Pin 2, 3, 10, 11, 13 ※1

CONT

-0.3 ～ 5.3 V

OSC

Pin 12 ※1 Operating temperature range Topr -25 ～ +85 ℃ Storage temperature range Tstg -55 ～ +150 ℃ Maximum junction temperature Tjmax +150 ℃

※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 Symbol Limit Unit Conditions

Supply voltage Vcc 10 ～ 27 V Pin 1, 15, 16, 27, 28 ※1 ※2

Minimum load impedance RL 3.6 Ω

※6 Do not, however exceed Pd. ※ No radiation-proof design

Technical Note

※6

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2011.10 - Rev.C

BD5445EFV

Technical Note

●Electrical characteristics （ Unless otherwise specified Ta=25℃, Vcc=24V, f=1kHz, RL=8Ω, Po=1W, Gain=20dB, PDX=24V, MUTEX=24V, MS=0V, Single-ended outputs）

Item Symbol

Limit

Min Typ Max

Unit Conditions

Whole circuit

Circuit current 1 I

Circuit current 2 (Power down mode)

- 25 50 mA

CC1

I

- 2 4 mA

CC2

Pin 1, 15, 16, 27, 28 No load, No signal

Pin 1, 15, 16, 27, 28 PDX=0V,MUTEX=0V, No load, No signal

Control circuit

High level input voltage for control VIH 2.5 - 24 V

Low level input voltage for control VIL 0 - 0.8 V

High level input voltage for clock V

Low level input voltage for clock V

2.5 - 5 V

IHC

0 - 0.8 V

ILC

Pin 2, 3, 10, 11, 13

Pin 12

Audio circuit

Momentary maximum output power

Voltage gain

PO1 - 10 -

PO2 - 17 - RL=4Ω, THD+n=10% ※7

G

12 14 16

V0

GV1 18 20 22 Gain1=0V, Gain0=24V ※7

GV2 24 26 28 Gain1=24V, Gain0=0V ※7

RL=8Ω, THD+n=10% ※7

W

Gain1=0V, Gain0=0V ※7

dB

GV3 30 32 34 Gain1=24V, Gain0=24V ※7

Total harmonic distortion THD - 0.05 - %

Crosstalk CT 60 75 - dB

Output noise voltage VNO - 80 160 μVrms

Residual noise voltage (Power down mode)

- 1 10 μVrms

V

NOR

Mute attenuation GVM 80 94 - dB

Power supply rejection ratio PSRR - 60 - dB

Internal oscillation frequency F

External clock frequency F

※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.

480 600 720 kHz

OSC

480 - 720 kHz

EXT

BW=20～20kHz

※7

Rg=0Ω, BW=IHF-A

※7

Rg=0Ω, BW=IHF-A

※7

PDX=0V, MUTEX=0V Rg=0Ω, BW=IHF-A

※7

MUTEX=0V, BW= IHF-A

※7

Vripple=1Vrms, BW= IHF-A Rg=0Ω, fripple=100Hz ※7

Pin 12, MS=0V

※7

Pin 12, MS=24V

※7

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2011.10 - Rev.C

BD5445EFV

Technical Note

●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board.

2.5

3

2

RL=8Ω No　Sign al PDX=MUTEX=L

1.5

Icc (mA)

1

0.5

0

8 1012141618202224262830

Vcc (V)

40

35

30

25

20

Ic c (m A)

15

10

RL=8Ω No　Sign al PDX=MUTEX=H

5

0

8 1012141618202224262830

Vcc (V)

Fig. 1 Power supply voltage－Current consumption Fig. 2 Power supply voltage－Current consumption

100

10

Vcc=24V RL=8Ω BW=20～20kHz

100

10

1

THD+N(%)

0.1

6kHz

1kHz

1

THD+N(%)

0.1

0.01

0.001 0.01 0.1 1 10 100

OUTPUT POWER(W)

100Hz

0.01 10 100 1000 10000 100000

FREQUENCY(Hz)

Fig.3 Output power－THD+N Fig.4 Frequency－THD+N

0

Vcc=24V RL=8Ω fin=1kHz BW=20～20kHz

0.001 0.01 0.1 1 10 100

OUTPUT POWER(W)

CROSSTALK(dB)

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

0

Vcc=24V

-10 RL=8Ω

Po=1W

-20 BW=20～20kHz

-30

-40

-50

-60

CROSSTALK(dB)

-70

-80

-90

-100 10 100 1000 10000 100000

FREQUENCY(Hz)

Fig.5 Output power－Crosstalk Fig.6 Frequency－Crosstalk

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2011.10 - Rev.C

BD5445EFV

)

Technical Note

●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board.

40

35

30

25

20

15

10

VOLTAGE GAIN(dB

5

0

-5

-10 10 100 1000 10000 100000

Vcc=24V RL=8Ω Po=1W L=47uH C=0.39uF

Gain=38dB

Gain=32dB

Gain=26dB

Gain=20dB

FREQUENCY(Hz)

0

-20 Vcc=24V

RL=8Ω

-40 No Signal BW=20～20kHz

-60

-80

NOISE FFT(dBV)

-100

-120

-140 10 100 1000 10000 100000

FREQUENCY(Hz)

Fig.7 Frequency－Voltage gain Fig.8 FFT of Output Noise Voltage

Vcc=24V Gain=20dB FILP=22uF

Speaker Output

10V/div.

FILP

2V/div.

10V/div.

PDX

50ms/div.

Vcc=24V Gain=20dB FILP=22uF

10V/div.

2V/div.

10V/div.

Speaker Output

FILP

PDX

50ms/div.

Fig.9 Waveform when releasing Power-down Fig.10 Waveform when activating Power-down

Vcc=24V Po=1W fin=200Hz

Speaker Output

Vcc=24V Po=1W fin=200Hz

2V/div.

10V/div.

MUTEX

10ms/div.

2V/div.

10V/div.

MUTEX

10ms/div.

Fig.11 Waveform when releasing Soft-mute Fig.12 Waveform when activating Soft-mute

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2011.10 - Rev.C

BD5445EFV

Technical Note

●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board.

26 24 22 20 18 16 14 12 10

Output Power (W/ch)

RL=8Ω fin=1kHz

THD+n=10%

8 6 4 2 0

8 1012141618202224262830

VCC(V)

THD+n=1%

100

90

80

70

60

50

40

EFFICIENCY (%)

30

Vcc=24V

20

RL=8Ω fin=1kHz

10

0

0 2 4 6 8 10 12 14 16 18 20

OUTPUT POWER(W/ch)

Fig.13 Power supply voltage－Output power (RL=8Ω) Fig.14 Output power－Efficiency (RL=8Ω)

1.8

1.6

1.4

1.2

1

0.8

0.6

Consumption Current (A)

0.4

0.2

0

0 5 10 15 20 25 30 35 40

Vcc=24V RL=8Ω fin=1kHz

TOTA L O UTPUT PO WER (W)

26 24 22 20 18 16 14 12 10

Output Power (W/ch)

RL=6Ω fin=1kHz

THD+n=10%

8 6 4 2 0

8 1012141618202224262830

VCC(V)

THD+n=1%

Fig.15 Total output power－Current consumption (RL=8Ω) Fig.16 Power supply voltage－Output power (RL=6Ω)

100

90

80

70

60

50

40

EFFICIENCY (%)

30

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Vcc=24V

20

RL=6Ω fin=1kHz

10

0

0 2 4 6 8 10 12 14 16 18 20

Fig.17 Output power－Efficiency (R

OUTPUT POWER(W/ch)

=6Ω) Fig.18 Total output power－Current consumption (RL=6Ω)

L

2

1.8

1.6

1.4

1.2

1

ICC(A)

0.8

0.6

0.4

0.2

0

0 5 10 15 20 25 30 35 40

Vcc=24V RL=6Ω fin=1kHz

TOTA L O UTPUT PO WER (W)

2011.10 - Rev.C

BD5445EFV

Technical Note

●Typical Characteristic Data (SE×2ch）Measured on ROHM’s evaluation board. Dotted lines of the graphs indicate continuous output power by installing additional heat sinks.

26 24 22 20 18 16 14 12 10

Output Power (W/ch)

8 6 4 2 0

Fig.19 Power supply voltage－Output power (RL=4Ω) Fig.20 Output power－Efficiency (RL=4Ω)

RL=4Ω fin=1kHz

THD+n=10%

THD+n=1%

8 1012141618202224262830

Vcc (V)

100

90

80

70

60

50

40

EFFICIENCY (%)

30

20

10

0

0 5 10 15 20

Vcc=24V RL=4Ω fin=1kHz

OUTPUT POWER(W/ch)

2

1.8

1.6

1.4

1.2

1

ICC(A)

0.8

0.6

0.4

0.2

0

0 5 10 15 20 25 30 35 40

Vcc=24V RL=4Ω fin=1kHz

TOTA L O UTPUT PO WER (W)

Fig.21 Total output power－Current consumption (R

=4Ω)

L

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7/31

2011.10 - Rev.C

BD5445EFV

●Typical Characteristic Data (SE×2ch）Measured on ROHM’s evaluation board. Dotted lines of the graphs indicate continuous output power by installing additional heat sinks.

100

10

Vcc=24V RL=8Ω BW=20～20kHz

100

10

Vcc=24V RL=8Ω Po=1W BW=20～20kHz

1

THD+N(%)

0.1

6kHz

1

THD+N(%)

1kHz

0.1

Technical Note

0.01

0.001 0.01 0.1 1 10 100

OUTPUT POWER(W)

Fig.22 Output power－THD+n Fig.23 Frequency－THD+n

40

35

30

25

20

15

10

VOLTAGE GAIN(dB)

Vcc=24V RL=8Ω

5

Po=1W

0

L=47uH C=0.39uF

-5

-10 10 100 1000 10000 100000

FREQUENCY(Hz)

Fig.24 Frequency－Voltage gain Fig.25 FFT of Output Noise Voltage

100Hz

Gain=38dB

Gain=32dB

Gain=26dB

Gain=20dB

0.01 10 100 1000 10000 100000

0

-20 Vcc=24V

RL=8Ω

-40 No Signal BW=20～20kHz

-60

-80

NOISE FFT(dBV)

-100

-120

-140 10 100 1000 10000 100000

FREQUENCY(Hz)

50

45

40

35

30

25

20

Ou pu t P ow er (W)

15

10

5

0

8 1012141618202224262830

Fig.26 Power supply voltage－Output power (R

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Vc c (V)

=8Ω) Fig.27 Output power－Efficiency (RL=8Ω)

L

100

90

80

70

60

50

40

EFFICIENCY (%)

30

20

10

0

0 5 10 15 20 25 30 35 40

Vcc=24V RL=8Ω fin=1kHz

OUTPUT POWER(W/ch)

2011.10 - Rev.C

BD5445EFV

●Typical Characteristics Data (BTL) Measured on ROHM’s evaluation board.

2

1.8

1.6

1.4

1.2

1

ICC(A)

0.8

0.6

0.4

0.2

0

0 5 10 15 20 25 30 35 40

Vcc=24V RL=8Ω fin=1kHz

TOTA L O UTPUT PO WER (W)

Fig.28 Total output power－Current consumption (R

=8Ω)

L

Technical Note

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2011.10 - Rev.C

BD5445EFV

●Pin configuration and Block diagram

1

2

3

4

5

6

7

8

9

10

11

12

13

14

VCCA

Gain

Control

4step

Gain

Amp.

GNDA

FILA

FILP

Power down

Control

Mute

Control

Oscillator

Control

REG_G

PWM

Modulator

PWM

Modulator

High Temperature Protection

Output Short Protection

Under Voltage Protection

Driver

1

Driver

2

VCCP1

VCCP2

Technical Note

28

27

26

25

REG_G

24

23

22

21

20

19

REG_G

18

17

16

15

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10/31

2011.10 - Rev.C

BD5445EFV

●Pin function explanation (Provided pin voltages are typ. values)

Pin No.

Pin name Pin voltage Pin explanation Internal equivalence circuit

1 VCCA Vcc Power supply pin for Analog signal

2 3

GAIN0 GAIN1

－

Gain control pin

4 5

IN1 IN2

2.5V ch1 Analog signal input pin ch2 Analog signal input pin

Input audio signal via a capacitor.

6 GNDA 0V Gnd pin for Analog signal

7 FILA 2.5V Bias pin for Analog signal

Please connect the capacitor.

8 FILP

2～4V

Bias pin for PWM signal

Please connect the capacitor.

9 ROSC 2.5V Internal PWM sampling clock frequency

setting pin

Please connect the resister setting Master mode. Please connect the capacitor setting Slave mode.

10 PDX

－

Power down control pin

H: Power down OFF L: Power down ON

4/5

1

8

6

1

6

Technical Note

16K～40K

40K～64K

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2011.10 - Rev.C

BD5445EFV

Pin No.

11 MU T E X － Speaker output mute control pin

12 OSC － PWM sampling clock input and output pin

13 MS － Master mode and Slave mode control pin

14 REG_G 5.5V Internal power supply pin for Gate driver

15 16

17 18

19

20 21

Technical Note

Pin name Pin voltage Pin explanation Internal equivalence circuit

H: Mute OFF L: Mute ON

When using 2 or more ICs, connect to these pins.

H: Slave mode L: Master mode

Please connect the capacitor.

VCCP2 Vcc Power supply pin for ch2 PWM signal

OUT2 0V～Vcc Output pin of ch2 PWM

Please connect to Output LPF.

BSP2 5V Boot-strap pin of ch2

Please connect the capacitor.

GNDP2

0V Gnd pin for ch2 PWM signal

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2011.10 - Rev.C

BD5445EFV

Technical Note

Pin No.

22 23 24

Pin name Pin voltage Pin explanation Internal equivalence circuit

GNDP1

0V Gnd pin for ch1 PWM signal

BSP1 5V Boot-strap pin of ch1

Please connect the capacitor. 25 26

OUT1 0V～Vcc Output pin of ch1 PWM

Please connect to Output LPF.

27 28

VCCP1 Vcc Power supply pin for ch1 PWM signal

●Audio input circuit (pin4 and pin5)

Connect the audio input pin with a prior-stage circuit via coupling capacitors C4 and C5. Because C4, C5 and input impedance R4, R5 of the IC circuit compose the primary HPF, the values determine an input low-band cutoff frequency. Input cutoff frequencies are calculated by the following formulas:

1

[]

=Cf

Hz

C4•2πR4

1

[]

=Cf

Hz

C5•2πR5

An excessively high capacitance of an input coupling capacitor results in a longer period required for stabilizing a power input

pin voltage after turning on the power supply. Note that placing the MUTEX pin (pin11) at "L" level (mute turned off) for avoidance of Pop-noise before stabilizing an input pin. R4 and R5 are changed by Gain setting.

GAIN1

(3pin)

GAIN0

(2pin)

R4,R5 input

impedance(TYP.)

Amplifier Gain (SE) Amplifier Gain (BTL)

L L 40kΩ 14dB 20dB

L H 40kΩ 20dB 26dB H L 26.7kΩ 26dB 32dB H H 16kΩ 32dB 38dB

C4

R4

4

Prior-stage

circuit

C5

R5

5

Fig. 29 Coupling capacitors of audio input pins

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2011.10 - Rev.C

BD5445EFV

Technical Note

●Output LC Filter Circuit (Pins 17, 18, 25, and 26)

An output filter is required to eliminate radio-frequency components exceeding the audio-frequency region supplied to a load (speaker). Because this IC uses sampling clock between 480kHz and 720kHz in the output PWM signals, the high-frequency components must be appropriately removed. This section takes an example of an LC type LPF, in which coil L

fil and capacitor Cfil compose a differential filter with an

attenuation property of -12dB/oct. A large part of switching currents flow to capacitor Cfil, and only a small part of the currents flow to speaker R

L. The following is a table for output LC filter constants.

Speaker RL L

[μH] C

fil

[μF] C

fil1

fil2

[μF]

4Ω 22 0.68 ―

SE output

6Ω 33 0.47 ― 8Ω 47 0.39 ― 4Ω 15 0.22 1

BTL output

6Ω 22 0.15 0.68 8Ω 33 0.1 0.47

In SE(single end) applications, the dc blocking capacitor (Cse) and speaker impedance compose the primary HPF. The cutoff

frequency is determined by

=Cf

2πC

SE

1

[]

Hz

R•

L

The following table is Cse setting at cutoff frequency 20Hz, 40Hz, and 60Hz.

R

L

fc=60Hz fc=40Hz fc=20Hz

CSE[μF]

4Ω 680 1000 2200 6Ω 470 680 1500 8Ω 330 470 1000

Fig.30 SE filter configuration

Fig.31 BTL filter configuration

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2011.10 - Rev.C

BD5445EFV

Technical Note

●Control pins function ①GAIN0, GAIN1 function

GAIN1 (Pin 3)

GAIN0

(Pin 2)

Amplifier Gain (SE) Amplifier Gain (BTL)

L L 14dB 20dB

L H 20dB 26dB

H L 26dB 32dB

H H 32dB 38dB

②MUTEX, PDX function

MUTEX (Pin 11)

PDX

(Pin 10)

Speaker output Power down

L L HiZ_Low ON

L H Mute OFF

H H Normal operation OFF

H L Forbidden

③MS function

MS

(13pin)

Mode

L Master mode

H Slave mode

Please connect ROSC terminal (pin 9) to 22kohm resister for setting master mode.

※ ※Please connect to the following filter, and input clock (duty = 50%) to OSC terminal (pin 12) for setting slave mode.

PWM Sampling frequency is sited from input clock. If input clock have noise (ex.Jitter), noise appear to Speaker output.

High level input voltage (Max.voltage) of tease control pin is equal to Vcc voltage. But absolute max.voltage of

※

In0(pin4),ROSC(pin9),OSC(pin12) and REG_G(pin14) is 5.3V. Tease pins may break, when short next pins. If these pins short to Vcc, connecting through 10k

Fig.32 ROSC terminal filter circuit for setting slave mode.

Ω resister prevent IC from destruction.

Vcc

10kΩ

BD5445EFV

pin2 pin3 pin10 pin11 pin13

Fig.33

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15/31

2011.10 - Rev.C

BD5445EFV

●Power supply start-up sequence

VCCA(1pin) VCCP1(27,28pin) VCCP2(15,16pin)

PDX(10pin)

①PDX set high after power supply voltage

is stabilized sufficiency.

MUTEX(11pin)

FILP(8pin)

OUT1(25,26pin) OUT2(17,18pin)

Speaker output

800msec(typ.)

Technical Note

②MUTEX set high after speaker output dc voltage is stabilized sufficiency.

Sotf-start

55msec(typ.)

t

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2011.10 - Rev.C

BD5445EFV

●Power supply shut-down sequence

Power supply shut down, after PDX (Pin 10) change H→L. The IC has possibly to sound POP noise, if PDX (Pim10) keep H. Speaker’s coupling capacitor (Fig30:Cse) don’t discharge at this time. Pop-noise may sound when power supply start up at the next time.

Technical Note

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17/31

2011.10 - Rev.C

BD5445EFV

Technical Note

●Power supply start-up and shut-down sequence for single control

Short between PDX(Pin 10) and MUTEX(Pin 11), enable to control these pins at one time.

PDX (Pin 10) and MUTEX (Pin 11) set low at one time, while this IC is on normal mode, the IC don't operate soft-mute. If low frequency and high level signal input this time, the IC has possibility to sound POP-Noise. To avoid this POP-Noise configure the following circuit, because PDX (Pin10) enables to change low after MUTEX (Pin11) have changed. This sequence make less POP-Noise because the IC can operate soft-mute.

PD/MUTE Control

MUTEX

R

10

C

10

PDX

11

10

110KΩ

90KΩ

110KΩ

90KΩ

τH=R10×C10

τL=(R10+200KΩ)×C10

Control configuration for soft-mute operation by single control

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18/31

2011.10 - Rev.C

BD5445EFV

Technical Note

●About the protection function

Protection

function

Detecting

Output short protection

condition

Releasing

condition

High temperature protection

Detecting

condition

Releasing

condition

Detecting

Under voltage protection

condition

Releasing

condition

※ All protection functions are restored automatically when the fault is removed.

Detecting & Releasing condition

Detecting current = 10A (TYP.) HiZ_Low

Release from Vcc or Gnd short

Chip temperature to be above 150℃ (TYP.) HiZ_Low

Chip temperature to be below 125℃ (TYP.)

Power supply voltage to be below 8V (TYP.) HiZ_Low

Power supply voltage to be above 9V (TYP.)

PWM

Output

Normal

operation

Normal

operation

Normal

operation

1）Output short protection（Short to the power supply）

This IC has the output short protection circuit that stops the PWM output when the PWM output is short-circuited to the power supply due to abnormality. Detecting condition – It will detect when PDX pin is set High and the current that flows in the PWM output pin becomes

10A(TYP.) or more. The PWM output instantaneously enters the state of HiZ-Low if detected, and IC does the latch.

Releasing method – This IC detect releasing from Vcc short every 220msec(TYP.). Normal operation is restored when

releasing from Vcc short.

Vcc short

Release from Vcc short

OUT1(Pin 25,26) OUT2(Pin 17,18)

Current

10A(TYP.)

Speaker output : Vcc short

Speaker output : Hiz-Low release from Vcc short

Speaker output : Normal operation IC restores automatically release from Vcc short

t

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19/31

2011.10 - Rev.C

BD5445EFV

2）Output short protection（Short to Gnd）

This IC has the output short protection circuit that stops the PWM output when the PWM output is short-circuited to Gnd due to abnormality. Detecting condition – It will detect when PDX pin is set High and the current that flows in the PWM output terminal becomes

10A(TYP.) or more. The PWM output instantaneously enters the state of HiZ-Low if detected, and IC does the latch.

Releasing method – This IC detect releasing from Gnd short every 220msec(TYP.). Normal operation is restored when

releasing from Gnd short.

(※)Remark of output short protection

Circuit current changes suddenly, when IC detects output short protection. At this time IC may break, because supply voltage rise up by back electromotive force. Decoupling capacitors (VCCPI and VCCP2) should be placed as close to the IC as possible. (recommend 4.7μF or more.)

Technical Note

www.rohm.com

20/31

2011.10 - Rev.C

BD5445EFV

3）High temperature protection

This IC has the high temperature protection circuit that prevents thermal reckless driving under an abnormal state for the temperature of the chip to exceed Tjmax=150℃. Detecting condition - It will detect when PDX pin is set High and the temperature of the chip becomes 150℃(TYP.) or more.

The speaker output is muted through a soft-mute when detected.

Releasing condition - It will release when PDX pin is set High and the temperature of the chip becomes 120℃(TYP.) or less.

The speaker output is outputted through a soft-start when released.

Technical Note

www.rohm.com

21/31

2011.10 - Rev.C

BD5445EFV

Technical Note

4）Under voltage protection

This IC has the under voltage protection circuit that make speaker output mute once detecting extreme drop of the power supply voltage. Detecting condition – It will detect when PDX pin is set High and the power supply voltage becomes lower than 8V.

The speaker output is muted when detected.

Releasing condition – It will release when PDX pin is set High and the power supply voltage becomes more than 9V.

The speaker output is outputted through a soft-start when released.

VCCA (1pin) VCCP1 (27,28pin) VCCP2 (15,16pin)

8V

9V

OUT1 (25, 26pin) OUT2 (17, 18pin)

Out put : HiZ-Low

Speaker

output

Soft-start 55msec(typ.)

800msec(typ.)

t

www.rohm.com

22/31

2011.10 - Rev.C

BD5445EFV

●Application Circuit Example ( single-ended output ×2 )

Technical Note

+

www.rohm.com

23/31

2011.10 - Rev.C

BD5445EFV

g

Technical Note

●BOM List ( single-ended output ×2 )

Parts Parts No. V alue Company Product No.

IC U1

Inductor L17, L25 47μH TOKO A7503AY-470M

Res is tor ROHM

R1 10 Ω MCR18EZHF10R0 1/4W F(±1%) 3.2mm×1.6mm

R9A 22 kΩ MCR01MZPF2202 1/16W F(±1%) 1.0mm×0.5mm

R17,R25 15Ω MCR18EZHF15R0 1/4W F(±1%) 3.2mm×1.6mm

C1 1 0μF GRM32DF51H106ZA01 50V

C19, C24 4.7uF GRM21BB31C475KA87 16V B(±10%

－

ROHM BD5444EFV

Capacitor MURA TA

Electrolytic

Capacitor

C15A, C27A 4.7uF GRM31CF11H475ZA01 50V

C17A, C25A 0.39uF GRM32MB11H394KA 01 50V B(±10%

C14 3. 3μF GRM188B31A335KE15 10V B(±10%

C4, C5 , C7 1 μF GRM185B30J105KE25 6.3V B(±10%

C17B, C25B 330pF GRM188B11H331KA01 50V B(±10%

C15B, C17C, C25C,

C27 B

C8 100uF 16ZLH100M 16V ±20% φ5mm×11mm

470μF 35ZLH470M 35V ±20% φ10mm×16mm

Rubycon

Rat ed

Volta

Tolerance Size

e

－－

－

±20% φ11mm×13.5mm

Y5V

(+80% /

-20%)

F (+80% /

-20%)

）

9.7mm×6.4mm

3.2mm×2.5mm

2.0mm×1.2mm

3.2mm×1.6mm

3.2mm×2.5mm

1.6mm×0.8mm

※1) Please change the following parts, when using RL=6Ω speaker.

(

Inductor L17, L25 33μH TOKO A 7503AY -330M

Res is tor R1 7, R25 10Ω ROHM MCR1 8EZHF10 R0 1 /4W F(±1 %) 3 .2mm×1 .6 mm

Capacitor

C17A, C25A 0.47μF GRM32MB11H474KA 01 50V B(±10%

C17B, C25B 680pF GRM188B11H681KA01 50V B(±10%

C17C, C25C 680μF Rubycon 35ZLH680M 35V ±20% φ10mm×23mm

MURA T A

－

±20% φ11mm×13.5mm

3.2mm×2.5mm

）

1.6mm×0.8mm

）

※2) Please change the following parts, when using RL=4Ω speaker.

(

Inductor L17, L25 22μH TOKO A 7503AY-220M - ±20% φ11mm×13.5mm

Res is tor R1 7, R25 5 .6Ω ROHM MCR18EZHFL5R60 1/4W F(±1%) 3.2mm×1.6mm

Capacitor

C17A, C25A 0.68μF GRM32NB11H684KA01 50V B(±10%

C17B, C25B 1000pF GRM188B11H102KA01 50V B(±10%

C17C, C25C 1000μF Rubycon 35ZLH1000M 35V ±20% φ12.5mm×20mm

MURA T A

））

3.2mm×2.5mm

1.6mm×0.8mm

www.rohm.com

24/31

2011.10 - Rev.C

BD5445EFV

Technical Note

●Application Circuit Example ( BTL output )

VCC

10μF

Gain

Control

IN1

Differential Input

IN2

Power down

Control

Mute

Control

CLK/IO

Master/Slave

3.3μF

C1

C14

R1

10Ω

1μF

+

100μF

R9A

22KΩ

C27BC27A

470μF4.7μF

Driver

1

Driver

2

VCCP1

VCCP2

REG_G

28

4.7μF

VCC

R25

15Ω

L25

33μH

C24

C25A

0.1μF

C17A

0.1μF

C19

L17

33μH

R17

15Ω

C15BC15A

470μF4.7μF

27

C25B 330pF

26

25

24

23

22

21

20

19

18

17

C17B

330pF

16

15

VCCA

1

2

Gain

Control

3

4

10

11

12

13

14

5

6

7

8

9

4step

Gain

Amp.

GNDA

FILA

FILP

Power down

Control

Mute

Control

Oscillator

Control

REG_G

High Temperature Protection

C4

C5

C7

C8

PWM

Modulator

PWM

Modulator

Output Short Protection

Under Voltage Protection

C17D

0.47μF

8Ω

www.rohm.com

25/31

2011.10 - Rev.C

BD5445EFV

g

Technical Note

●BOM List ( BTL output )

Parts Parts No. Value Company Product No.

IC U1

Inductor L17, L25 33μH TOKO A 7503AY-330M

Res is tor ROHM

R1 10Ω MCR18EZHF10R0 1/4W F(±1%) 3.2mm×1.6mm

R9A 22 kΩ MCR01MZPF2202 1/16W F(±1%) 1.0mm×0.5mm

R17,R25 15Ω MCR18EZHF15R0 1/4W F(±1%) 3.2mm×1.6mm

C1 10 μF GRM32DF51H106ZA01 50V

－

ROHM BD5444EFV

Capacitor MURATA

Electrolytic

Capacitor

C19, C24 4.7uF GRM21BB31C475KA87 16V B(±10%

C15A, C27A 4.7uF GRM31CF11H475ZA01 50V

C17A, C25A 0.1uF GRM188B31H104KA92 50V B(±10%

C17D 0.47uF GRM32MB11H474LA01 50V B(±20%

C14 3. 3μF GRM188B31A335KE15 10V B(±10%

C4, C5 , C7 1 μF GRM185B30J105KE25 6.3V B(±10%

C17B, C25B 330pF GRM188B11H331KA01 50V B(±10%

C15B, C27B 470μF 35ZLH470M 35V ±20% φ10mm×16mm

C8 100uF 16ZLH100M 16V ±20% φ5mm×11mm

Rubycon

Rat ed

Volta

Toleranc e Size

e

－－

－

±20% φ11mm×13.5mm

Y5V

(+80% /

-20%)

）

F (+80% /

-20%)

）

9.7mm×6.4mm

3.2mm×2.5mm

2.0mm×1.2mm

3.2mm×1.6mm

1.6mm×0.8mm

3.2mm×2.5mm

1.6mm×0.8mm

※1) Please change the following parts, when using RL=6Ω speaker.

(

Inductor L17, L25 22μH TOKO A 7503AY-220M

Res is tor R1 7, R25 1 0Ω ROHM MCR1 8EZHF 10R0 1 /4W F( ±1 %) 3. 2mm×1 .6 mm

Capacitor MURATA

C17A, C25A 0.15μF GRM21BB31H154MA88 50V B(±20%

C17B, C25B 680pF GRM188B11H681KA01 50V B(±10%

C17D 0.68μF GRM32NB11H684MA01 50V B(±20%

－

±20% φ11mm×13.5mm

2.0mm×1.2mm

）

1.6mm×0.8mm

）

3.2mm×2.5mm

）

※2) Please change the following parts, when using RL=4Ω speaker.

(

Inductor L17, L25 15μH TOKO A 7503AY -150M

Res is tor R1 7, R25 5.6 Ω ROHM MCR18EZHFL5R60 1/4W F(±1%) 3.2mm×1.6mm

Capacitor MURATA

C17A, C25A 0.22μF GRM21BB31H224MA88 50V B(±20%

C17B, C25B 1000pF GRM188B11H102KA01 50V B(±10%

C17D 1μF GRM31MB31H105KA 87 50V B(±20%

-

±20% φ11mm×13.5mm

2.0mm×1.2mm

）

1.6mm×0.8mm

）

3.2mm×2.5mm

）

www.rohm.com

26/31

2011.10 - Rev.C

BD5445EFV

●Application Circuit Example ( 2.1ch output )

VCC

Technical Note

10μF

Control

IN1

IN2

Power down

Control

Mute

Control

Master (L input)

3.3μF

C1

Gain

Clock output

C14

R1

10Ω

1μF +

100μF

R9A

22KΩ

C4

1μF

C5

1μF

C7

C8

10

12

13

14

11

1

2

3

4

5

6

7

8

9

VCCA

Gain

Control

4step

Gain Amp.

GNDA

FILA

FILP

Power down

Control

Mute

Control

Oscillator

Control

REG_G

Master

PWM

Modulator

PWM

Modulator

High Temperature Protection

Output Short Protection

Under Voltage Protection

Driver

1

Driver

2

VCCP1

VCCP2

REG_G

C27BC27A

470μF4.7μF

28

C25B 330pF

C17B

330pF

R25

15Ω

L25 C25C

47μH

C24

4.7μF

C25A

0.39μF

C17A

0.39μF

C19

4.7μF L17

47μH

R17

15Ω

VCC

C15BC15A

470μF4.7μF

470μF +

+ C17C

470μF

8Ω

27

26

25

24

23

22

21

20

19

18

17

16

15

VCC

C1

10μF

Gain

C14

R1

10Ω

100μF

C9A

2200pF

Clock input

C4

1μF

C5

1μF

C7 1μF +

C8

10

12

13

14

11

1

2

3

4

5

6

7

8

9

VCCA

Gain

Control

4step

Gain Amp.

GNDA

FILA

FILP

Power down

Control

Mute

Control

Oscillator

Control

REG_G

Slave

PWM

Modulator

PWM

Modulator

High Temperature Protection

Output Short Protection

Under Voltage Protection

Driver

1

Driver

2

VCCP1

VCCP2

REG_G

C27BC27A

470μF4.7μF

28

C25B

330pF

C17B

330pF

4.7μF

VCC

R25

15Ω

L25

33μH

C24

C25A

0.1μF

C17A

0.1μF

C19

L17

33μH

R17

15Ω

C17D

0.47μF

8Ω

C15BC15A

470μF4.7μF

27

26

25

24

23

22

21

20

19

18

17

16

15

Differential Input

Control

IN1

IN2

R9B

22KΩ

C9B

220pF

Power down

Control

Mute

Control

Slave (H input)

3.3μF

www.rohm.com

27/31

2011.10 - Rev.C

BD5445EFV

g

●BOM List ( 2.1ch output )

Technical Note

Parts Parts No. Value Company Product No.

Resistor R9B 22kΩ ROHM MCR01MZPF2202 1/16W F(±1%) 1.0mm×0.5mm

Capacitor MURATA

(

※) Parts are written used at "Slave mode" only. Please use same parts written P23 ～ P26.

C9A 2200pF GRM155R61A222KA01 10V X5R(±10%）1.0mm×0.5mm

C9B 220pF GRM1552C1E221JA01 25V CH(±5%）1.0mm×0.5mm

Rated

Volta

Tolerance Size

e

www.rohm.com

28/31

2011.10 - Rev.C

BD5445EFV

●Notes for use

1 ) Absolute maximum ratings

Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the IC in a special mode where the absolute maximum ratings may be exceeded is anticipated.

2 ) Power supply lines

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 ) Gnd potential （Pin 6, 20, 21, 22, 23）

Ensure a minimum Gnd pin potential in all operating conditions.

4 ) Input terminal

The parasitic elements are formed in the LSI because of the voltage relation. The parasitic element operating causes the wrong operation and destruction. Therefore, please be careful so as not to operate the parasitic elements by impressing to input terminals lower voltage than Gnd. Please do not apply the voltage to the input terminal when the power-supply voltage is not impressed.

5 ) Setting of heat

Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. This IC exposes its frame of the backside of package. Note that this part is assumed to use after providing heat dissipation treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern not only on the board surface but also the backside. Class D power amplifier is High efficiency and low heat generation by comparison with conventional Analog power amplifier. However, In case it is operated continuously by maximum output power, Power dissipation(Pdiss) may exceed package dissipation. Please consider about heat design that Power dissipation(Pdiss) does not exceed Package dissipation(Pd) in average power(Poav). （Tjmax ：Maximum junction temperature=150℃, Ta ：Peripheral temperature[℃], θja ：Thermal resistance of package[℃/W], Poav：Average power[W], η：Efficiency）

Package dissipation: Pd （W） = （Tjmax - Ta）／θja Power dissipation: Pdiss（W） = Poav * （1

Actions in strong magnetic field

6 )

Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction.

7 ) Thermal shutdown 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℃.

8 ) Shorts between pins and misinstallation

When mounting the LSI on a board, pay adequate attention to orientation and placement discrepancies of the LSI. If it is misinstalled and the power is turned on, the LSI may be damaged. It also may be damaged if it is shorted by a foreign substance coming between pins of the LSI or between a pin and a power supply or a pin and a Gnd

9 ) Power supply on/off (Pin 1, 15, 16, 27, 28）

In case power supply is started up, PDX (Pin 10) and MUTEX (Pin 11) always should be set LOW, And in case power supply is shut down, it should be set LOW likewise. Then it is possible to eliminate pop noise when power supply is turned on/off. And also, all power supply terminals should start up and shut down together.

10 ) Precautions for Speaker-setting

If the impedance characteristics of the speakers at high-frequency range while increase rapidly, the IC might not have stable-operation in the resonance frequency range of the LC-filter. Therefore, consider adding damping-circuit, etc., depending on the impedance of the speaker.

／η- 1）

Technical Note

www.rohm.com

29/31

2011.10 - Rev.C

BD5445EFV

●Allowable Power Dissipation

Measuring instrument：TH-156（Kuwano Electrical Instruments Co., Ltd.） Measuring conditions：Installation on ROHM’s board Board size：70mm×70mm×1.6mm（with thermal via on board） Material：FR4 ・The board on exposed heat sink on the back of package are connected by soldering.

PCB①：1-layer board（back copper foil size: 0mm×0mm）， θja＝86.2℃/W PCB②：2-layer board（back copper foil size: 70mm×70mm），θja＝37.8℃/W PCB③：4-layer board（back copper foil size: 70mm×70mm），θja＝26.6℃/W

6

PCB③ 4.7W

5

4

PCB② 3.3W

3

2

PCB① 1.45W

Power dissipatio n :Pd (W)

1

0

0 102030405060708090100110120130140150

Ambient temperature :Ta (℃)

Technical Note

www.rohm.com

30/31

2011.10 - Rev.C

BD5445EFV

●Ordering part number

B D 5 4 4 5 E F V - E 2

Part No. Part No.

HTSSOP-B28

9.7±0.1

(MAX 10.05 include BURR)

(5.5)

1528

4.4±0.1

6.4±0.2

1.0MAX

0.625

141

1PIN MARK

0.85±0.05

0.08±0.05

0.65

0.24

+0.05

-

0.04

(2.9)

0.08 S

0.08

S

M

+

6

°

4

°

−4°

+0.05

0.17

-

(Unit : mm)

0.5±0.15

0.03

1.0±0.2

Package EFV:HTSSOP-B28

Embossed carrier tape (with dry pack)Tape

Quantity

Direction of feed

2500pcs E2

()

Packaging and forming specification E2: Embossed tape and reel

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

Reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Technical Note

Direction of feed

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31/31

2011.10 - Rev.C

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied 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 specications, 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 specied 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 specied 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 specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).

The Products specied 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, re or any other damage caused in the event of the failure of any Product, such as derating, redundancy, re 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, fuelcontroller 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 specied 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.

Notice

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/

R1120

A

ROHM BD5445EFV Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual