BH7884EFV-E2

Class-AB Speaker Amplifiers 1W+1W Stereo Speaker / Headphone Amplifier BH7884EFV No.14077EBT06 ●Description The BH7884EFV is a low voltage, low noise, high output speaker and headphone amplifier drive, in which a Bi-CMOS process is used. This IC supports: headphone amplifier gain adjustment, active/suspend switching, speaker amplifier stereo/monaural switching, and amplifier mute switching. All functions are controllable from a microcontroller. Built-in digital noise reduction circuits eliminate digital noise and BEEP sounds. ●Features 1) Built-in 1W+1W stereo speaker amplifier (Vcc=5V, RL=8Ω, THD=10%) 2) Built-in stereo headphone amplifier 3) Built-in bass boost function for speaker amplifier 4) Built-in low noise VCA (electronic volume) for headphone 5) Built-in mute circuit 6) Built-in standby circuit 7) Low current consumption specifications (9 mA TYP. in ACTIVE mode, 0.2 μA TYP. in SUSPEND mode) ●Applications Notebook computers, LCD TVs, etc. ●Absolute maximum ratings(Ta=25℃) Parameter Ratings Unit +6.0 V 1100 *1 mW Storage temperature -55 ~ +125 ℃ Operating temperature -10 ~ +70 ℃ Supply voltage Power dissipation *1 Reduced by 11 mW/℃ at 25℃ or higher, when mounting on a 70mmX70mmX1.6mm PCB board). ●Operating Conditions (Ta=25℃) Parameter Supply voltage * Ratings Unit +3.0~+5.5 V This IC is not designed to be radiation-resistant. www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 1/10 2014.04 - Rev.B Technical Note BH7884EFV ●Electrical characteristics (Unless otherwise noted, VCC=3.3V, Ta=25℃, f=1kHz) Limits Parameter Symbol Unit Min. Typ. Max. ■1 CHIP Condition Circuit current ACTV IA - 9.0 18.0 mA No signal ACTIVE Circuit current SPND Is - 0.2 10.0 µA No signal Voltage gain1 GSP1 9.0 12.0 15.0 dB SE, Vin=-18dBV,RL=8Ω Voltage gain2 GSP2 15.2 18.2 21.2 dB BTL, Vin=-18dBV Distortion DSP - 0.1 1.0 % BTL, Vin=-18dBV Maximum output level VOSP 2.2 5.2 - dBV BTL, DSP=1% Output noise level VNSP - -97 -80 dBV SE, DIN-Audio Cross talk CTSP - -90 -80 dBV SE, Vin=-18dBV, DIN-Audio Output level on mute MTSP - -102 -80 dBV BTL, Vin=-18dBV Voltage gain 3 GHP 2.6 5.6 8.6 dB VOL:MAX, RL=10kΩ,Vin=-12dBV Voltage gain 4 GHP -10 -7 -4 dB VOL:MAX, RL=32Ω,Vin=-12dBV Distortion DHP - 0.025 0.1 % VOL:MAX, RL=32Ω,Vin=-8dBV Variable width of volume ΔGHP 70 100 - dB VOL:MIN ~ MAX, RL=32Ω Maximum output level VOHP -2.0 1.0 - dBV VOL:MAX, DHP=1%, RL=10kΩ Output noise level VNHP - -98 -80 dBV VOL:MAX, RL=32Ω, DIN-Audio Cross talk CTHP - -98 -80 dBV Output level on mute MTHP - -110 -80 dBV VBP 0.8 1.25 - Vpp VBIAS 1.4 1.7 2.0 V ACTIVE mode V11H VCC-0.3 - VCC V SUSPEND mode V11L GND - 0.3 V SP/ON mode V2H VCC-0.3 - VCC V SP/OFF mode V2L GND - 0.3 V BASS-BOOST/ON mode V4H VCC-0.7 - VCC V BASS-BOOST/OFF mode V4L GND - 0.7 V STEREO mode V3H VCC-0.7 - VCC V MONO mode V3L GND - 0.7 V ACTIVE mode V10H VCC-0.7 - VCC V MUTE mode V10L GND - 0.7 V GPR - -64 - dBV SUSPEND ■SP AMP ■HP AMP VOL:MAX, RL=32Ω,Vin=-12dBV DIN-Audio VOL:MAX, RL=32Ω,Vin=-12dBV DIN-Audio ■BEEP AMP Output voltage level Vin=1.3dBV, f=1kHz, 20MHzLPF ■BIAS Output voltage level No Signal ■CTRL Active mode. Hold Voltage of 11pin. Suspend mode. Hold Voltage of 11pin. SP / ON mode. Hold Voltage of 2pin. SP/OFF mode. Hold Voltage of 2pin. SP / Bass Boost mode. Hold Voltage of 4pin. SP / Non Boost mode. Hold Voltage of 4pin. SP / STEREO mode. Hold Voltage of 3pin. SP / MONO mode. Hold Voltage of 3pin. HP / Active mode. Hold Voltage of 10pin. HP / MUTE mode. Hold Voltage of 10pin. ■PSRR Ripple rejection ratio www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 2/10 f=100Hz, 0.3Vpp, SIN Input SPOUT monitor, DIN-Audio 2014.04 - Rev.B Technical Note BH7884EFV ●Block diagram Fig.1 www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 3/10 2014.04 - Rev.B Technical Note BH7884EFV ●Control pin settings SP MUTE PIN:2PIN H SP ACTIVE L SP MUTE SPAMP is in active state SPAMP is in suspend state STEREO/MONO PIN:3PIN H STEREO L MONO For SPAMP, LCH and RCH both are in active state For SPAMP, LCH is in active state and RCH is in suspend state BASSBOOST PIN:4PIN H BASS BOOST For SPAMP, bass is boosted L NON -BOOST For SPAMP, bass is not boosted MUTE PIN:10PIN H ACTIVE HPAMP is in active state L MUTE HPAMP is in mute state SUSPEND PIN:11PIN H ACTIVE The IC is in active state L SUSPEND The IC is in suspend state www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 4/10 2014.04 - Rev.B Technical Note BH7884EFV ●Equivalent circuit PIN1 SP_IN_LCH PIN2 SP_MUTE PIN3 ST/MN PIN4 BASS BOOST PIN5 LINE_IN_LCH PIN6 BIAS PIN7 BEEP_IN PIN8 LINE_IN_RCH PIN9 HP_VOL PIN10 HP_MUTE PIN11 SUSPEND PIN12 SP_IN_RCH 16k 47k 27k 60k www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 5/10 2014.04 - Rev.B Technical Note BH7884EFV PIN13 HP_OUT_RCH PIN14 VCC_RCH PIN15 BOOST_R_RCH PIN16 SPOUT1_RCH 25k 5k PIN17 PIN21 SPOUT2_RCH PIN18 GND_RCH PIN19 GND_LCH PIN20 SPOUT2_LCH 25k 25k 5k 5k SPOUT1_LCH PIN22 BOOST_R_LCH PIN23 VCC_LCH PIN24 HP_OUT_LCH 25k 5k www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 6/10 2014.04 - Rev.B Technical Note BH7884EFV ●Application circuit Fig.2 www.rohm.com © 2014 ROHM Co., Ltd. All rights reserved. 7/10 2014.04 - Rev.B Technical Note BH7884EFV ●Description of operations 1) LINEIN (5,8PIN) ~ HPOUT (13,24PIN) voltage gain The voltage gain at EVRMAX is generally calculated by the following equation: 40k GHP = 20 × log （dB） R5(or R8) The above gain attenuates according to the DC voltage of the VOL pin (9PIN). By connecting multiple resistances (R), mixing input can be handled. 2) BEEPIN (7PIN) ~ HPOUT (13,24PIN) When a pulse waveform is input at the BEEPIN pin, a pulse wave is output at HPOUT (24,13PIN). The output level, determined by the resistance of 7PIN, has default values as follows: HP OUT level Vcc=5V Vcc=4V Vcc=3.3V 1Vpp<