bd5445efv ROHM Co. Ltd., bd5445efv Datasheet
bd5445efv
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... BD5445EFV ●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 ultimate level. With this technology, the IC can achieve high efficiency of 91% (10W+10W output with 8Ω ...
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... 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 ※1 The voltage that can be applied, based on Gnd(Pin6, 20, 21, 22, 23) ※ ...
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... BD5445EFV ●Electrical characteristics （ Unless otherwise specified Ta=25℃, Vcc=24V, f=1kHz, R PDX=24V, MUTEX=24V, MS=0V, Single-ended outputs） Item Whole circuit Circuit current 1 Circuit current 2 (Power down mode) Control circuit High level input voltage for control Low level input voltage for control High level input voltage for clock ...
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... BD5445EFV ●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board. 3 RL=8Ω No Signal 2.5 PDX=MUTEX=L 2 1 Vcc (V) Fig. 1 Power supply voltage－Current consumption 100 Vcc=24V RL=8Ω BW=20～20kHz 10 1 6kHz 0.1 1kHz 0.01 0.001 0.01 0.1 1 OUTPUT POWER(W) Fig.3 Output power－THD+N 0 Vcc=24V -10 RL=8Ω ...
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... BD5445EFV ●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board Gain=38dB 30 Gain=32dB 25 Gain=26dB 20 Gain=20dB 15 10 Vcc=24V 5 RL=8Ω 0 Po=1W L=47uH -5 C=0.39uF -10 10 100 1000 FREQUENCY(Hz) Fig.7 Frequency－Voltage gain Vcc=24V Gain=20dB FILP=22uF 10V/div. 2V/div. 10V/div. Fig.9 Waveform when releasing Power-down Vcc=24V Po=1W Speaker ...
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... BD5445EFV ●Typical Characteristics Data (SE×2ch）Measured on ROHM’s evaluation board RL=8Ω 22 fin=1kHz THD+n=10 VCC(V) Fig.13 Power supply voltage－Output power (R 1.8 1.6 1.4 1.2 1 0.8 0.6 Vcc=24V 0.4 RL=8Ω fin=1kHz 0 TOTAL OUTPUT POWER(W) Fig.15 Total output power－Current consumption (R ...
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... 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 RL=4Ω 22 fin=1kHz THD+n=10 THD+n= Vcc (V) Fig.19 Power supply voltage－Output power ( ...
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... 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 Vcc=24V RL=8Ω BW=20～20kHz 10 1 6kHz 1kHz 0.1 100Hz 0.01 0.001 0.01 0.1 1 OUTPUT POWER(W) Fig.22 Output power－THD Gain=38dB 30 Gain=32dB 25 Gain=26dB ...
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... BD5445EFV ●Typical Characteristics Data (BTL) Measured on ROHM’s evaluation board. 2 1.8 1.6 1.4 1.2 1 0.8 0.6 Vcc=24V 0.4 RL=8Ω fin=1kHz 0 TOTAL OUTPUT POWER(W) Fig.28 Total output power－Current consumption (R www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved =8Ω) L 9/31 Technical Note 2010.05 - Rev.B ...
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... BD5445EFV ●Pin configuration and Block diagram 1 VCCA 2 Gain Control 3 4 4step Gain Amp GNDA 7 FILA 8 FILP 9 Power down 10 Control Mute 11 Control 12 Oscillator Control 13 14 REG_G www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Driver PWM Modulator Driver PWM Modulator High Temperature Protection ...
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... BD5445EFV ●Pin function explanation (Provided pin voltages are typ. values) Pin Pin name Pin voltage No. 1 VCCA Vcc － 2 GAIN0 3 GAIN1 4 IN1 2.5V 5 IN2 6 GNDA 0V 7 FILA 2.5V 8 FILP 2～4V 9 ROSC 2.5V － 10 PDX www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Pin explanation ...
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... BD5445EFV Pin Pin name Pin voltage No. － 11 MUTEX － 12 OSC － REG_G 5.5V 15 VCCP2 Vcc 16 17 OUT2 0V～Vcc 18 19 BSP2 5V 20 GNDP2 0V 21 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Pin explanation Speaker output mute control pin H: Mute OFF L: Mute ON ...
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... BD5445EFV Pin Pin name Pin voltage No. 22 GNDP1 BSP1 5V 25 OUT1 0V～Vcc 26 27 VCCP1 Vcc 28 ●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 the IC circuit compose the primary HPF, the values determine an input low-band cutoff frequency. Input ...
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... BD5445EFV ●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. ...
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... ROHM Co., Ltd. All rights reserved. Amplifier Gain (SE) Amplifier Gain (BTL) 14dB 20dB 26dB 32dB Speaker output HiZ_Low Mute Normal operation Forbidden Mode Vcc 10kΩ BD5445EFV pin2 pin3 pin10 pin11 pin13 Fig.33 15/31 Technical Note 20dB 26dB 32dB 38dB Power down ON ...
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... 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.) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ②MUTEX set high after speaker output dc voltage is stabilized sufficiency. ...
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... 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. ...
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... BD5445EFV ●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 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 ...
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... BD5445EFV ●About the protection function Protection function Detecting Output short condition protection Releasing condition Detecting High condition temperature Releasing protection condition Detecting Under voltage condition protection Releasing condition ※ All protection functions are restored automatically when the fault is removed. 1）Output short protection（Short to the power supply） ...
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... 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 ...
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... 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. ...
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... BD5445EFV 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. ...
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... BD5445EFV ● Application Circuit Example ( single-ended output × www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 23/31 Technical Note 2010.05 - Rev.B ...
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... Please change the following parts, when using RL=4Ω speaker. Inductor L17, L25 22μH C17A, C25A 0.68μF Capacitor C17C, C25C 1000μF www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Company Product No. － ROHM BD5445EFV TOKO A7503AY-470M MCR18EZPF10R0 ROHM MCR01MZPF2202 MCR18EZPF15R0 GRM32DF51H106ZA01 GRM21BB31C475KA87 GRM31CF11H475ZA01 MURATA GRM32MB11H394KA01 GRM188B31A335KE15 1μF GRM185B30J105KE25 ...
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... BD5445EFV ● Application Circuit Example ( BTL output ) VCC R1 10Ω C1 10μF 1 VCCA 2 Gain Gain Control Control 3 IN1 4 4step C4 Gain 1μF Amp. IN2 5 C5 1μF Differential 6 GNDA Input 7 FILA C7 1μ FILP C8 100μF 9 R9A 22KΩ Power down Power down ...
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... Please change the following parts, when using RL=4Ω speaker. Inductor L17, L25 15μH C17A, C25A 0.22μF Capacitor C17D www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Company Product No. － ROHM BD5445EFV TOKO A7503AY-330M MCR18EZPF10R0 ROHM MCR01MZPF2202 MCR18EZPF15R0 GRM32DF51H106ZA01 GRM21BB31C475KA87 GRM31CF11H475ZA01 MURATA GRM188B31H104KA92 GRM21BB31H474MA87 GRM188B31A335KE15 1μ ...
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... BD5445EFV ● Application Circuit Example ( 2.1ch output ) VCC R1 10Ω C1 10μF 1 VCCA 2 Gain Control 3 4 IN1 C4 1μF IN2 5 C5 1μF 6 GNDA 7 FILA C7 1μ FILP C8 100μF 9 R9A 22KΩ Power down Power down 10 Control Mute 11 Control Clock output ...
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... BD5445EFV ● BOM List ( 2.1ch output ) Parts Parts No. Resistor R9B C9A 2200pF Capacitor C9B 220pF Parts are written used at "Slave mode" only. Please use same parts written P23 ～ P26. (※) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Value Company Product No. 22kΩ ...
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... 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 special mode where the absolute maximum ratings may be exceeded is anticipated ...
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... BD5445EFV ●Allowable Power Dissipation 6 PCB③ 4.7W PCB③ 4. PCB② 3.3W PCB② 3. PCB① 1.45W PCB① 1.45W 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） ...
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... BD5445EFV ●Ordering part number Part No. Part No. HTSSOP-B28 9.7±0.1 (MAX 10.05 include BURR) (5.5) + 6° 4° −4° 1PIN MARK 0.625 0.17 S 0.08 S 0.65 +0.05 0.24 -0.04 0.08 M (Unit : mm) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved Package EFV:HTSSOP-B28 <Tape and Reel information> Tape ...
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