bd5444efv ROHM Co. Ltd., bd5444efv Datasheet

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Middle Power Class-D Speaker Amplifiers Analog Input / Single End Output Class-D Speaker Amplifier 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 ...

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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 ...

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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 ...

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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 ...

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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. ...

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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 ...

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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= ...

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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) ...

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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 ...

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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 ...

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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 ...

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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. ...

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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 ...

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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 ...

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BD5445EFV ●Control pins function ①GAIN0, GAIN1 function GAIN1 GAIN0 (Pin 3) (Pin ②MUTEX, PDX function MUTEX PDX (Pin 11) (Pin 10 ③MS function ...

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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 ...

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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 ...

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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 IC ...

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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. ...

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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 ...

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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 ...

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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 ...

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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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BD5445EFV ● BOM List ( single-ended output × Parts Parts No. Value IC U1 Inductor L17, L25 47μH R1 10Ω Resistor R9A 22kΩ R17,R25 15Ω C1 10μF C19, C24 4.7uF C15A, C27A 4.7uF Capacitor C17A, C25A 0.39uF C14 ...

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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 ...

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BD5445EFV ● BOM List ( BTL output ) Parts Parts No. Value IC U1 Inductor L17, L25 33μH R1 10Ω Resistor R9A 22kΩ R17,R25 15Ω C1 10μF C19, C24 4.7uF C15A, C27A 4.7uF Capacitor C17A, C25A 0.1uF C17D 0.47uF C14 ...

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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 ...

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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., ...

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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 ...

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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 ...

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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 ...

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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 ...