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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 8 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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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 VIN VCONT VOSC Topr Tstg Tjmax
Limit 30 1.45 3.30 4.70 -0.3 5.3 -0.3 Vcc + 0.3 -0.3 5.3 -25 +85 -55 +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 70mmx70mmx1.6mm, FR4, 1-layer glass epoxy board (Copper on bottom layer 0%) Derating in done at 11.6mW/ for operating above Ta25. 4 70mmx70mmx1.6mm, FR4, 2-layer glass epoxy board (Copper on bottom layer 100%) Derating in done at 26.4mW/ for operating above Ta25. There are thermal via on the board. 5 70mmx70mmx1.6mm, FR4, 4-layer glass epoxy board (Copper on bottom layer 100%) Derating in done at 37.6mW/ for operating above Ta25. There are thermal via on the board.
Operating conditions (Ta25) Item Supply voltage Minimum load impedance
6 Do not, however exceed Pd. No radiation-proof design
Symbol Vcc RL
Limit 10 27 3.6
Unit V
Conditions Pin 1, 15, 16, 27, 28
1 2 6
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2/31
2010.05 - Rev.B
BD5445EFV
Technical Note
Electrical characteristics Unless otherwise specified Ta=25, Vcc=24V, f=1kHz, RL=8, 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 ICC1 25 50 mA No load, No signal Pin 1, 15, 16, 27, 28 Circuit current 2 ICC2 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 VIH 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 PO1 PO2 GV0 GV1 GV2 GV3 THD CT VNO 12 18 24 30 60 10 17 14 20 26 32 0.05 75 80 16 22 28 34 160 W RL=8, THD+n=10% RL=4, THD+n=10% Gain1=0V, Gain0=0V Gain1=0V, Gain0=24V Gain1=24V, Gain0=0V Gain1=24V, Gain0=24V BW=2020kHz Rg=0, BW=IHF-A 7 Rg=0, BW=IHF-A 7 PDX=0V, MUTEX=0V Rg=0, BW=IHF-A 7 GVM PSRR FOSC FEXT 80 480 480 94 60 600 720 720 dB dB kHz kHz MUTEX=0V, BW= IHF-A 7 Vripple=1Vrms, BW= IHF-A Rg=0, fripple=100Hz Pin 12, MS=0V Pin 12, MS=24V 7 7 7 7 7 7 7 7 7 7 VIL VIHC VILC 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 Vrms
VNOR
-
1
10
Vrms
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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3/31
2010.05 - Rev.B
BD5445EFV
Typical Characteristics Data (SEx2chMeasured on ROHM's evaluation board.
Technical Note
3 RL=8 NoSignal PDX=MUTEX=L
40 35 30 25
Icc (mA)
2.5 2
Icc (mA)
RL=8 NoSignal 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 voltageCurrent consumption
Fig. 2 Power supply voltageCurrent consumption
100 Vcc=24V RL=8 BW=2020kHz
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 powerTHD+N
Fig.4
FrequencyTHD+N
0 -10 -20 -30
CROSSTALK(dB)
0 Vcc=24V RL=8 fin=1kHz BW=2020kHz
CROSSTALK(dB)
-10 -20 -30 -40 -50 -60 -70 -80 -90 -100
Vcc=24V RL=8 Po=1W BW=2020kHz
-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 powerCrosstalk
Fig.6 FrequencyCrosstalk
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4/31
2010.05 - Rev.B
BD5445EFV
Typical Characteristics Data (SEx2chMeasured 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=8 No Signal BW=2020kHz
Vcc=24V RL=8 Po=1W L=47uH C=0.39uF 10000 100000
10
100
1000
FREQUENCY(Hz)
10000
100000
Fig.7 FrequencyVoltage 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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5/31
2010.05 - Rev.B
BD5445EFV
Typical Characteristics Data (SEx2chMeasured on ROHM's evaluation board.
Technical Note
26 24 22 20 18
EFFICIENCY(%)
100 RL=8 fin=1kHz 90 80 70 60 50 40 30 THD+n=1% 20 10 0 8 10 12 14 16 18 20 22 24 26 28 30 0 2 4 6 8 10 12 14 16 18 20
VCC(V) OUTPUT POWER(W/ch)
Output Power (W/ch)
16 14 12 10 8 6 4 2 0 THD+n=10%
Vcc=24V RL=8 fin=1kHz
Fig.13 Power supply voltageOutput power (RL=8)
Fig.14 Output powerEfficiency (RL=8)
1.8 1.6 1.4
Consumption Current (A) Output Power (W/ch)
26 24 22 20 18 16 14 12 10 8 6 4 2 0 0 5 10 15 20 25 30 35 40 8 10 12 14 16 18 20 22 24 26 28 30
TOTAL OUTPUT POWER(W) VCC(V)
RL=6 fin=1kHz
1.2 1 0.8 0.6 0.4 0.2 0 Vcc=24V RL=8 fin=1kHz
THD+n=10%
THD+n=1%
Fig.15 Total output powerCurrent consumption (RL=8)
Fig.16 Power supply voltageOutput power (RL=6)
100 90 80 70
EFFICIENCY(%)
2 1.8 1.6 1.4 1.2
ICC(A)
60 50 40 30 20 10 0 0 2 4 6 8 10 12 14 16 18 20
OUTPUT POWER(W/ch)
1 0.8 0.6
Vcc=24V RL=6 fin=1kHz
0.4 0.2 0 0 5 10
Vcc=24V RL=6 fin=1kHz 15 20 25 30 35 40
TOTAL OUTPUT POWER(W)
Fig.17 Output powerEfficiency (RL=6)
Fig.18 Total output powerCurrent consumption (RL=6)
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6/31
2010.05 - Rev.B
BD5445EFV
Typical Characteristic Data (SEx2chMeasured on ROHM's evaluation board. Dotted lines of the graphs indicate continuous output power by installing additional heat sinks.
Technical Note
26 24 22 20
Output Power (W/ch)
100
RL=4 fin=1kHz
90 80 70
EFFICIENCY(%)
18 16 14 12 10 8 6 4 2 0 8 10 12 14 16 18 20 22 24 26 28 30 Vcc (V) THD+n=1% THD+n=10%
60 50 40 30 20 10 0 0 5 10
OUTPUT POWER(W/ch)
Vcc=24V RL=4 fin=1kHz
15
20
Fig.19
2 1.8 1.6 1.4 1.2
ICC(A)
Power supply voltageOutput power (RL=4)
Fig.20 Output powerEfficiency (RL=4)
1 0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30 35 40
TOTAL OUTPUT POWER(W)
Vcc=24V RL=4 fin=1kHz
Fig.21 Total output powerCurrent consumption (RL=4)
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7/31
2010.05 - Rev.B
BD5445EFV
Typical Characteristic Data (SEx2chMeasured on ROHM's evaluation board. Dotted lines of the graphs indicate continuous output power by installing additional heat sinks.
Technical Note
100 Vcc=24V RL=8 BW=2020kHz
100 Vcc=24V RL=8 Po=1W BW=2020kHz
10
10
THD+N(%)
1
6kHz 1kHz
THD+N(%)
1
0.1
0.1
100Hz 0.01 0.001 0.01 0.01 0.1 1 10 100 10 100 1000
FREQUENCY(Hz)
10000
100000
OUTPUT POWER(W)
Fig.22 Output powerTHD+n
Fig.23 FrequencyTHD+n
40 35 30
VOLTAGE GAIN(dB)
0 Gain=38dB Gain=32dB -40
NOISE FFT(dBV)
-20 Vcc=24V RL=8 No Signal BW=2020kHz
25 20 15 10 5 0 -5 -10 10 100 1000
FREQUENCY(Hz)
Gain=26dB Gain=20dB Vcc=24V RL=8 Po=1W L=47uH C=0.39uF
-60 -80 -100 -120 -140
10000
100000
10
100
1000
FREQUENCY(Hz)
10000
100000
Fig.24 FrequencyVoltage gain
Fig.25
FFT of Output Noise Voltage
50 45 40 35
Ouput Power (W) EFFICIENCY(%)
100 90 80 70 60 50 40 30 20 10 0 8 10 12 14 16 18 20 22 24 26 28 30 0 5 10 15 20 25 30 35 40
Vcc (V) OUTPUT POWER(W/ch)
30 25 20 15 10 5 0
Vcc=24V RL=8 fin=1kHz
Fig.26 Power supply voltageOutput power (RL=8)
Fig.27 Output powerEfficiency (RL=8)
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8/31
2010.05 - Rev.B
BD5445EFV
Typical Characteristics Data (BTL) Measured on ROHM's evaluation board.
Technical Note
2 1.8 1.6 1.4 1.2
ICC(A)
1 0.8 0.6 0.4 0.2 0 0 5 10 15 20 25 30 35 40
TOTAL OUTPUT POWER(W)
Vcc=24V RL=8 fin=1kHz
Fig.28 Total output powerCurrent consumption (RL=8)
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9/31
2010.05 - Rev.B
BD5445EFV
Pin configuration and Block diagram
Technical Note
1 2 3 4 5 6 7 8 9 10 11 12 13 14
VCCA
VCCP1
28 27
Gain Control PWM Modulator 4step Gain Amp.
GNDA FILA FILP
Driver 1 REG_G
26 25 24 23 22 21 20
Power down Control Mute Control
19 REG_G PWM Modulator Driver 2 18 17 16 High Temperature Protection Output Short Protection Under Voltage Protection VCCP2 15
Oscillator Control
REG_G
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10/31
2010.05 - Rev.B
BD5445EFV
Pin function explanation (Provided pin voltages are typ. values) Pin Pin name Pin voltage Pin explanation No. 1 VCCA Vcc Power supply pin for Analog signal 2 3 GAIN0 GAIN1 Gain control pin
Technical Note
Internal equivalence circuit
4 5
IN1 IN2
2.5V
ch1 Analog signal input pin ch2 Analog signal input pin Input audio signal via a capacitor.
1 16K40K 4/5 40K64K
6
6 7
GNDA FILA
0V 2.5V
Gnd pin for Analog signal Bias pin for Analog signal Please connect the capacitor.
8
FILP
24V
Bias pin for PWM signal Please connect the capacitor.
1
8
6
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
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11/31
2010.05 - Rev.B
BD5445EFV
Technical Note
Pin No. 11
Pin name MUTEX
Pin voltage
Pin explanation Speaker output mute control pin H: Mute OFF L: Mute ON
Internal equivalence circuit
12
OSC
PWM sampling clock input and output pin When using 2 or more ICs, connect to these pins.
13
MS
Master mode and Slave mode control pin H: Slave mode L: Master mode
14
REG_G
5.5V
Internal power supply pin for Gate driver Please connect the capacitor.
15 16 17 18
VCCP2 OUT2
Vcc 0VVcc
Power supply pin for ch2 PWM signal Output pin of ch2 PWM Please connect to Output LPF.
19
BSP2
5V
Boot-strap pin of ch2 Please connect the capacitor.
20 21
GNDP2
0V
Gnd pin for ch2 PWM signal
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12/31
2010.05 - Rev.B
BD5445EFV
Technical Note
Pin No. 22 23 24
Pin name GNDP1 BSP1
Pin voltage 0V 5V
Pin explanation Gnd pin for ch1 PWM signal Boot-strap pin of ch1 Please connect the capacitor. Output pin of ch1 PWM Please connect to Output LPF.
Internal equivalence circuit
25 26
OUT1
0VVcc
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 [Hz ] fC = 2R4 * C4
1 [Hz ] fC = 2R5 * C5
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) L L H H GAIN0 (2pin) L H L H R4,R5 input impedance(TYP.) 40k 40k 26.7k 16k
Amplifier Gain (SE) 14dB 20dB 26dB 32dB
Amplifier Gain (BTL) 20dB 26dB 32dB 38dB
C4 4
R4
Prior-stage circuit C5 5 R5
Fig. 29 Coupling capacitors of audio input pins
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13/31
2010.05 - Rev.B
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 Lfil 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 RL. The following is a table for output LC filter constants. Speaker SE output RL 4 6 8 4 BTL output 6 8 Lfil[H] 22 33 47 15 22 33 Cfil1[F] 0.68 0.47 0.39 0.22 0.15 0.1 Cfil2[F] 1 0.68 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
1 [Hz ] fC = 2CSE * RL
The following table is Cse setting at cutoff frequency 20Hz, 40Hz, and 60Hz. RL 4 6 8 CSE[F] fc=60Hz 680 470 330 fc=40Hz 1000 680 470 fc=20Hz 2200 1500 1000
Fig.30 SE filter configuration
Fig.31 BTL filter configuration
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14/31
2010.05 - Rev.B
BD5445EFV
Control pins function GAIN0, GAIN1 function GAIN1 (Pin 3) L L H H MUTEX, PDX function MUTEX (Pin 11) L L H H MS function MS (13pin) L H
Technical Note
GAIN0 (Pin 2) L H L H
Amplifier Gain (SE) 14dB 20dB 26dB 32dB
Amplifier Gain (BTL) 20dB 26dB 32dB 38dB
PDX (Pin 10) L H H L
Speaker output HiZ_Low Mute Normal operation Forbidden
Power down ON OFF OFF
Mode Master mode 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.
Fig.32 ROSC terminal filter circuit for setting slave mode.
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 resister prevent IC from destruction.
Vcc 10k BD5445EFV pin2 pin3 pin10 pin11 pin13
Fig.33
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15/31
2010.05 - Rev.B
BD5445EFV
Power supply start-up sequence
Technical Note
VCCA(1pin) VCCP1(27,28pin) VCCP2(15,16pin)
t
PDX(10pin) PDX set high after power supply voltage is stabilized sufficiency.
t
MUTEX(11pin) MUTEX set high after speaker output dc voltage is stabilized sufficiency.
t
FILP(8pin)
t
OUT1(25,26pin) OUT2(17,18pin)
t
Speaker output
t
800msec(typ.) Sotf-start 55msec(typ.)
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16/31
2010.05 - Rev.B
BD5445EFV
Power supply shut-down sequence
Technical Note
Power supply shut down, after PDX (Pin 10) change HL. 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.
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17/31
2010.05 - Rev.B
BD5445EFV
Power supply start-up and shut-down sequence for single control
Technical Note
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
110K 11 90K
H=R10xC10
PDX R10 C10 110K 10 90K
L=(R10+200K)xC10
Control configuration for soft-mute operation by single control
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18/31
2010.05 - Rev.B
BD5445EFV
About the protection function Protection function Detecting condition Releasing condition Detecting condition Releasing condition Detecting condition Releasing condition PWM Output HiZ_Low Normal operation HiZ_Low Normal operation HiZ_Low Normal operation
Technical Note
Detecting & Releasing condition
Output short protection
Detecting current = 10A (TYP.) Release from Vcc or Gnd short Chip temperature to be above 150 (TYP.) Chip temperature to be below 125 (TYP.) Power supply voltage to be below 8V (TYP.) Power supply voltage to be above 9V (TYP.)
High temperature protection
Under voltage protection
All protection functions are restored automatically when the fault is removed.
1Output short protectionShort 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)
t
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
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19/31
2010.05 - Rev.B
BD5445EFV
Technical Note
2Output short protectionShort 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 4.7F or more.)
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20/31
2010.05 - Rev.B
BD5445EFV
Technical Note
3High 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.
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21/31
2010.05 - Rev.B
BD5445EFV
Technical Note
4Under 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)
9V 8V
t
OUT1 (25, 26pin) OUT2 (17, 18pin) Out put : HiZ-Low
t
Soft-start 55msec(typ.) Speaker output
t
800msec(typ.)
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22/31
2010.05 - Rev.B
BD5445EFV
Application Circuit Example ( single-ended output x2 )
Technical Note
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+
+
23/31
2010.05 - Rev.B
BD5445EFV
BOM List ( single-ended output x2 )
Parts IC Inductor Resistor Parts No. U1 L17, L25 R1 R9A
R17,R25
Technical Note
Value 47H 10 22k 15 10F 4.7uF 4.7uF 0.39uF 3.3F 1F 330pF 470F 100uF
Company ROHM TOKO ROHM
Product No. BD5445EFV A7503AY-470M MCR18EZPF10R0 MCR01MZPF2202 MCR18EZPF15R0 GRM32DF51H106ZA01 GRM21BB31C475KA87
Rated Voltage 1/4W 1/16W 1/4W 50V 16V 50V 50V 10V 6.3V 50V 35V 16V
Tolerance 20% F(1%) F(1%) F(1%) Y5V (+80% / -20%) B(10% F (+80% / -20%) B(10% B(10% B(10% B(10% 20% 20%
Size 9.7mmx6.4mm 11mmx13.5mm 3.2mmx1.6mm 1.0mmx0.5mm 3.2mmx1.6mm 3.2mmx2.5mm 2.0mmx1.2mm 3.2mmx1.6mm 3.2mmx2.5mm 1.6mmx0.8mm 1.6mmx0.8mm 1.6mmx0.8mm 10mmx16mm 5mmx11mm
C1 C19, C24 Capacitor C15A, C27A
C17A, C25A
MURATA
GRM31CF11H475ZA01 GRM32MB11H394KA01 GRM188B31A335KE15 GRM185B30J105KE25 GRM188B11H331KA01
C14 C4, C5, C7
C17B, C25B
Electrolytic Capacitor
C15B, C17C, C25C, C27B C8
Rubycon
35ZLH470M 16ZLH100M
(1) Please change the following parts, when using RL=6 speaker.
Inductor Capacitor L17, L25 C17A, C25A C17C, C25C 33H 0.47F 680F TOKO MURATA Rubycon A7503AY-330M GRM32MB11H474KA01 35ZLH680M 50V 35V 20% B(10% 20% 11mmx13.5mm 3.2mmx2.5mm 10mmx23mm
(2) Please change the following parts, when using RL=4 speaker.
Inductor Capacitor L17, L25 C17A, C25A C17C, C25C 22H 0.68F 1000F TOKO MURATA Rubycon A7503AY-220M GRM32NB11H684KA01 35ZLH1000M 50V 35V 20% B(10% 20% 11mmx13.5mm 3.2mmx2.5mm 12.5mmx20mm
www.rohm.com (c) 2010 ROHM Co., Ltd. All rights reserved.
24/31
2010.05 - Rev.B
BD5445EFV
Application Circuit Example ( BTL output )
Technical Note
VCC
R1 10 C1 10F
C27A 4.7F
C27B 470F
1 Gain Control 2 3 IN1 IN2 Differential Input 4 5 6 7
VCCA
VCCP1
28 27
R25 C25B 330pF 15 L25 33H C24 4.7F C25A 0.1F
Gain Control PWM Modulator 4step Gain Amp.
GNDA FILA FILP
Driver 1 REG_G
26 25 24 23 22 21 20
C4 1F C5 1F
C7 1F + 8 C8 100F R9A 22K
C17D 0.47F 8
9 10 11 12 13 14
Power down Control Mute Control
Power down Control Mute Control CLK/IO Master/Slave
19 REG_G PWM Modulator Driver 2 18 17 16 High Temperature Protection Output Short Protection Under Voltage Protection VCCP2 15
C15A 4.7F C17B 330pF
C17A 0.1F C19 4.7F L17 33H R17 15
Oscillator Control
VCC
REG_G
C14 3.3F
C15B 470F
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25/31
2010.05 - Rev.B
BD5445EFV
BOM List ( BTL output )
Parts IC Inductor Resistor Parts No. U1 L17, L25 R1 R9A R17,R25 C1 C19, C24 C15A, C27A Capacitor C17A, C25A C17D C14 C4, C5, C7 C17B, C25B Electrolytic Capacitor C15B, C27B C8 0.1uF 0.47uF 3.3F 1F 330pF 470F 100uF Rubycon Value 33H 10 22k 15 10F 4.7uF 4.7uF MURATA GRM188B31H104KA92 GRM21BB31H474MA87 GRM188B31A335KE15 GRM185B30J105KE25 GRM188B11H331KA01 35ZLH470M 16ZLH100M 50V 50V 10V 6.3V 50V 35V 16V ROHM Company ROHM TOKO Product No. BD5445EFV A7503AY-330M MCR18EZPF10R0 MCR01MZPF2202 MCR18EZPF15R0 GRM32DF51H106ZA01 GRM21BB31C475KA87 GRM31CF11H475ZA01 Rated Voltage 1/4W 1/16W 1/4W 50V 16V 50V Tolerance 20% F(1%) F(1%) F(1%) Y5V (+80% / -20%) B(10% F (+80% / -20%) B(10% B(20% B(10% B(10% B(10% 20% 20%
Technical Note
Size 9.7mmx6.4mm 11mmx13.5mm 3.2mmx1.6mm 1.0mmx0.5mm 3.2mmx1.6mm 3.2mmx2.5mm 2.0mmx1.2mm 3.2mmx1.6mm 1.6mmx0.8mm 2.0mmx1.2mm 1.6mmx0.8mm 1.6mmx0.8mm 1.6mmx0.8mm 10mmx16mm 5mmx11mm
(1) Please change the following parts, when using RL=6 speaker.
Inductor Capacitor L17, L25 C17A, C25A C17D 22H 0.15F 0.68F TOKO MURATA A7503AY-220M GRM21BB31H154MA88 GRM32NB11H684MA01 50V 50V 20% B(20% B(20% 11mmx13.5mm 2.0mmx1.2mm 3.2mmx2.5mm
(2) Please change the following parts, when using RL=4 speaker.
Inductor Capacitor L17, L25 C17A, C25A C17D 15H 0.22F 1F TOKO MURATA A7503AY-150M GRM21BB31H224MA88 GRM21BB31H105MA12 50V 50V 20% B(20% B(20% 11mmx13.5mm 2.0mmx1.2mm 2.0mmx1.2mm
www.rohm.com (c) 2010 ROHM Co., Ltd. All rights reserved.
26/31
2010.05 - Rev.B
BD5445EFV
Application Circuit Example ( 2.1ch output )
Technical Note
VCC
R1 10 C1 10F
Master
1 VCCA VCCP1 28 27 PWM Modulator 4step Gain Amp.
GNDA FILA FILP
C27A 4.7F
C27B 470F
Gain Control
2 3
R25 C25B 330pF 15 L25 47H C24 4.7F C25A 0.39F 8 C25C 470F +
Gain Control Driver 1 REG_G
26 25 24 23 22 21 20
IN1 IN2
C4 1F C5 1F
4 5 6
C7 1F + 8 C8 100F R9A 22K
7
9 10 11
Power down Control Mute Control
C17A 0.39F C19 4.7F L17 47H R17 15 + C17C 470F
Power down Control Mute Control
19 REG_G PWM Modulator Driver 2 18 17 C17B 16 High Temperature Protection Output Short Protection Under Voltage Protection VCCP2 15
C15A 4.7F
8
Clock output
12 13 14
Oscillator Control
330pF
Master (L input)
VCC
REG_G
C14 3.3F
C15B 470F
VCC
R1 10 C1 10F
Slave
1 VCCA VCCP1 28 27 PWM Modulator 4step Gain Amp.
GNDA FILA FILP
C27A 4.7F
C27B 470F
Gain Control Differential Input IN1 IN2
C4 1F C5 1F
2 3 4 5 6
C7 1F + 8 C8 100F
R25 C25B 330pF 15 L25 33H C24 4.7F C25A 0.1F
Gain Control Driver 1 REG_G
26 25 24 23 22 21 20
7
C17D 0.47F 8
R9B 22K C9B 220pF
9
C9A 2200pF
Power down Control Mute Control
10 11 12 13 14
Power down Control Mute Control
19 REG_G PWM Modulator Driver 2 18 17 16 High Temperature Protection Output Short Protection Under Voltage Protection VCCP2 15
C15A 4.7F C17B 330pF
C17A 0.1F C19 4.7F L17 33H R17 15
Clock input Slave (H input)
Oscillator Control
VCC
REG_G
C14 3.3F
C15B 470F
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27/31
2010.05 - Rev.B
BD5445EFV
BOM List ( 2.1ch output )
Technical Note
Parts Resistor Capacitor
Parts No. R9B C9A C9B
Value 22k 2200pF 220pF
Company ROHM MURATA
Product No. MCR01MZPF2202 GRM155R61A222KA01 GRM1552C1E221JA01
Rated Voltage 1/16W 10V 25V
Tolerance F(1%) X5R(10% CH(5%
Size 1.0mmx0.5mm 1.0mmx0.5mm 1.0mmx0.5mm
()
Parts are written used at "Slave mode" only. Please use same parts written P23 P26.
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28/31
2010.05 - Rev.B
BD5445EFV
Notes for use
Technical Note
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[], ja Thermal resistance of package[/W], PoavAverage power[W], Efficiency Package dissipation: Pd W = Tjmax - Taja Power dissipation: PdissW = Poav * 1- 1 6 ) Actions in strong magnetic field 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.
www.rohm.com (c) 2010 ROHM Co., Ltd. All rights reserved.
29/31
2010.05 - Rev.B
BD5445EFV
Allowable Power Dissipation
Technical Note
6
5
PCB 4.7W PCB 4.7W
Power dissipation :Pd (W)
4
PCB 3.3W PCB 3.3W
3
2
PCB 1.45W PCB 1.45W
1
0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Ambient temperature :Ta ()
Measuring instrumentTH-156Kuwano Electrical Instruments Co., Ltd. Measuring conditionsInstallation on ROHM's board Board size70mmx70mmx1.6mmwith thermal via on board MaterialFR4 The board on exposed heat sink on the back of package are connected by soldering. PCB1-layer boardback copper foil size: 0mmx0mm ja86.2/W PCB2-layer boardback copper foil size: 70mmx70mm ja37.8/W PCB4-layer boardback copper foil size: 70mmx70mm ja26.6/W
www.rohm.com (c) 2010 ROHM Co., Ltd. All rights reserved.
30/31
2010.05 - Rev.B
BD5445EFV
Ordering part number
Technical Note
B
Part No.
D
5
Part No.
4
4
5
E
F
V
-
E
2
Package EFV:HTSSOP-B28
Packaging and forming specification E2: Embossed tape and reel
HTSSOP-B28
9.70.1 (MAX 10.05 include BURR) (5.5)
28 15

Tape
+6 4 -4
0.50.15 1.00.2
Embossed carrier tape (with dry pack) 2500pcs E2
The direction is the 1pin of product is at the upper left when you hold
Quantity Direction of feed
6.40.2
4.40.1
(2.9)
( reel on the left hand and you pull out the tape on the right hand
)
1
14
0.625
1.0MAX
1PIN MARK S
+0.05 0.17 -0.03
0.850.05
0.080.05
0.08 S 0.65 +0.05 0.24 -0.04 0.08
M
1pin
Direction of feed
(Unit : mm)
Reel
Order quantity needs to be multiple of the minimum quantity.
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31/31
2010.05 - Rev.B
Notice
Notes
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, communication 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, 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 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.
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http://www.rohm.com/contact/
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