BD5446EFV Rohm, BD5446EFV Datasheet
BD5446EFV
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BD5446EFV Summary of contents
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... BD5446EFV ●Description BD5446EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-power consumption, delivers an output power of 20W+20W. 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 ultimate level. With this technology, the IC can achieve high efficiency of 87% (10W+10W output with 8Ω ...
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... BD5446EFV ●Absolute maximum ratings (Ta=25℃) Parameter Supply voltage Power dissipation Input voltage Open-drain terminal voltage Operating temperature range Storage temperature range Maximum junction temperature *1 The voltage that can be applied reference to GND (Pin 6, 36, 37, 45, 46 not, however exceed Pd and Tjmax=150℃. ...
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... BD5446EFV ●Electrical characteristics (Unless otherwise specified Ta=25℃,Vcc=13V,f=1kHz,R Gain=20dB,fs=48kHz) Item Symbol Total circuit Circuit current Circuit current (Power down mode) Open-drain terminal V Low level voltage Regulator output voltage 1 V Regulator output voltage 2 V High level input voltage Low level input voltage ...
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... BD5446EFV ●Electrical characteristic curves(V Measured by ROHM designed 4 layer board. 100 Sampling Mute VCC(V) Fig.1 Current consumption - Power supply voltage 100 OUTPUT PO WER(W/ch) Fig.4 Efficiency - Output power 100 BW=20～ ...
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... BD5446EFV ●Electrical characteristic curves(V Measured by ROHM designed 4layer board. 100 OUTPUT POWER(W /ch) Fig.13 Efficiency – Output power 100 BW=20～20KHz 10 1 6KHz 1KHz 0.1 100Hz 0.01 0.001 0.01 0 100 OUTPUT POWER(W) Fig.16 THD+N - Output power 0 Po=1W -10 BW=20～20KHz ...
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... BD5446EFV ●Pin configuration and Block diagram 1 REG_G1 2 FILP Power 3 Limiter 4 FILA 5 REG_3 GNDA S/LJ 9 Interface Control 13 Interface S/LJ 15 Selector 16 Gain 17 Selector 18 19 TEST 20 DAC 21 Selector 22 DAC VCCA REG_G2 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD5446EFV ●Pin function explanation (Provided pin voltages are typ. Values) No. Pin name Pin voltage 1 REG_G1 5.5V REG_G2 27 FILP 1.75V~2.55V 2 PLMT FILA 2.5V REG3 3.3V 5 GNDA 0V 6 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Pin explanation Internal power supply pin for ch1 Gate driver Internal power supply pin for ch2 Gate driver Please connect the capacitor ...
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... BD5446EFV No. Pin name Pin voltage 7 SYS_CLK 8 BCLK 9 LRCLK 0V 10 SDATA1 11 SDATA2 12 RESETX 13 MUTEX 0V PDX 14 15 IIS_LJ 0V 16 GAIN1 17 GAIN2 0V 18 GAIN3 19 TEST1 0V 20 TEST2 21 SEL_DAC 0V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Pin explanation Digital audio signal input pin Reset pin for Digital circuit ...
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... BD5446EFV No. Pin name Pin voltage 22 OUT_DAC2 2.5V 23 OUT_DAC1 24 ERROR 3.3V 25 VCCA VCC 26,30 34,35 N.C. － 41,47 48,52 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Pin explanation ch2 DAC output pin ch1 DAC output pin Please connect it with the latter part circuit through the capacitor. Error flag pin Please connect pull-up resistor ...
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... BD5446EFV No. Pin name Pin voltage 28,29 VCCP2 Vcc 31,32 OUT2P Vcc~0V BSP2P 33 － 36,37 GNDP2 0V 38,39 OUT2N Vcc~0V 40 BSP2N － 42 BSP1N － 43,44 OUT1N Vcc~0V 45,46 GNDP1 0V 49 BSP1P － 50,51 OUT1P Vcc~0V 53,54 VCCP1 － www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Pin explanation Power supply pin for ch2 PWM signal Output pin of ch2 positive PWM Please connect to Output LPF ...
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... BD5446EFV ●GAIN1 pin, GAIN2 pin, GAIN3 pin function GAIN3 GAIN2 GAIN1 (18pin) (17pin) (16pin ●SEL_DAC pin function SEL_DAC OUT_DAC1 (23pin) (21pin) L The Lch signal of SDATA1 is output H The Lch signal of SDATA2 is output ● ...
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... BD5446EFV prescribe voltage gain at speaker output (BTL output) under the definition 0dBV (1Vrms) as full scale input of the digital audio input signal. For example, digital audio input signal = Full scale input, Gain setting = 20dB, Load resistance R = 8Ω ...
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... BD5446EFV 2 S data format ●I 1/64fs Lch LRCLK BCLK SDATA1 MSB (SDATA2) Lch LRCLK BCLK SDATA1 MSB (SDATA2) Lch LRCLK BCLK SDATA1 ...
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... BD5446EFV ●Power supply start-up sequence VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) ①Power up VCCA, VCCP1, VCCP2 simultaneously. REG_3 (5pin) REG_G1 (1pin) REG_G2 (27pin) RESETX (12pin) ②Set RESETX to High after power up. SYS_CLK (7pin) BCLK (8pin) ③Degital audio data communication. LRCLK (9pin) SDATA1 (10pin) ...
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... BD5446EFV ●Power supply shut-down sequence VCCA (25pin) VCCP1 (53, 54pin) VCCP2 (28, 29pin) REG_3 (5pin) REG_G1, REG_G2 REG_G1 (1pin) REG_G2 (27pin) REG_3 RESETX (12pin) SYS_CLK (7pin) BCLK (8pin) LRCLK (9pin) SDATA1 (10pin) SDATA2 (11pin) PDX (14pin) OUT_DAC1 (23pin) OUT_DAC2 (22pin) MUTEX (13pin) www.rohm.com © ...
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... BD5446EFV ●About the protection function Protection function Output short Detecting protection condition DC voltage protection Detecting in the speaker condition Detecting condition High temperature protection Releasing condition Detecting condition Under voltage protection Releasing condition Detecting condition Clock stop protection Releasing condition * The ERROR pin is Nch open-drain output. ...
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... BD5446EFV 1) 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 MUTE 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 MUTE pin is set High and the temperature of the chip becomes 120℃ ...
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... BD5446EFV 2) 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 MUTE pin is set High and the power supply voltage becomes lower than 8V. ...
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... BD5446EFV 3) Clock stop protection This IC has the clock stop protection circuit that make the speaker output mute when the SYS_CLK signal of the digital audio input stops. Detecting condition - It will detect when MUTE pin is set High and the SYS_CLK signal stops for about 1usec or more. ...
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... BD5446EFV 4)Output short protection(Short to the power supply) This IC has the PWM 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 MUTE pin is set High and the current that flows in the PWM output pin becomes 10A(TYP ...
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... BD5446EFV 6) DC voltage protection in the speaker When the DC voltage in the speaker is impressed due to abnormality, this IC has the protection circuit where the speaker is defended from destruction. Detecting condition - It will detect when MUTE pin is set High or Low and PWM output Duty=0% or 100% , 43msec(fs=48kHz) or above. Once detected, The PWM output instantaneously enters the state of HiZ-Low, and IC does the latch. Releasing method – ...
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... BD5446EFV ●Output power limiter function This IC is provided with an output power limiter function to protect speakers from destruction by an excessive output. Limiter values are freely specified by changing external resistors R1/R2 as shown in Fig-26. Fig-27 shows a speaker output waveform that is generated with use of the output limiter function. Because the waveform is soft-clipped, unusual noises on audible signals are significantly reduced under operation of limiter. Use resistors with a high degree of accuracy for R1 and R2 (± ...
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... BD5446EFV ●Application Circuit Example(R L_SP C1 3.3μF GNDP1 1 REG_G1 C2 1μF 2 FILP ( ) Power ( ) 3 Limiter C4 4 FILA 1μ REG_3 1μF GNDA 6 GNDA SYS_CLK (256fs) 7 BCLK (64fs) 8 Digital Audio I 2 S/LJ LRCLK (fs=32kHz～48kHz) 9 Source Interface SDATA1 10 SDATA2 11 RESETＸ 12 Control MUTEＸ μ-con ...
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... C1, C27 C2, C4, C5 C22, C23 C31B, C38B C43B, C50B C28D, C53D Electrolytic Capacitor C25D www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Value Company Product No. ROHM BD5446EFV － TOKO 1168ER-0001 22μH SAGAMI DBE7210H-220M 5.6Ω ROHM MCR18PZHZFL5R60 1μF GRM185B31C105KE43 0.1μF GRM188B31H104KA92 0.068μF GRM21BB11H683KA01 0.33μ ...
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... BD5446EFV ●Application Circuit Example(R L_SP C1 3.3μF GNDP1 1 REG_G1 C2 1μF 2 FILP ( ) Power ( ) 3 Limiter C4 4 FILA 1μ REG_3 1μF GNDA 6 GNDA SYS_CLK (256fs) 7 BCLK (64fs) 8 Digital Audio I 2 S/LJ LRCLK (fs=32kHz～48kHz) 9 Source Interface SDATA1 10 SDATA2 11 RESETＸ 12 Control MUTEＸ μ-con ...
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... C1, C27 C2, C4, C5 C22, C23 C31B, C38B C43B, C50B C28D, C53D Electrolytic Capacitor C25D www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Value Company Product No. ROHM BD5446EFV － 15μH SAGAMI DBE7210H-150M 5.6Ω ROHM MCR18PZHZFL5R60 1µF GRM185B31C105KE43 0.1μF GRM188B31H104KA92 0.47μF GRM21BB31H474KA87 MURATA 3.3μF GRM188B31A335KE15 1μ ...
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... BD5446EFV ●Output LC Filter Circuit 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 frequencies from 200kHz to 400kHz in the output PWM signals, the high-frequency components must be appropriately removed. This section takes an example type LPF shown in Fig.29, in which coil L and capacitor C compose a differential filter with an attenuation property of -12dB/oct ...
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... BD5446EFV ●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 special mode where the absolute maximum ratings may be exceeded is anticipated ...
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... BD5446EFV ●Allowable Power Dissipation 7 PCB ③ 6. PCB ② 4. PCB ① 2. Measuring instrument : TH-156(Shibukawa 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. ...
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... BD5446EFV ●Ordering part number Part No. Part No. HTSSOP-B54 18.5±0.1 (MAX 18.85 include BURR) (6. 1PIN MARK 0.8 0.08 0.65 +0.05 0.22 -0.04 0.08 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved Package EFV : HTSSOP-B54 <Tape and Reel information> Tape Embossed carrier tape (with dry pack) + 6° ...
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... ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing ...