Class-AB Speaker Amplifiers 1W+1W Stereo Speaker / Headphone Amplifier No.14077EBT06 BH7884EFV 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=8, 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 A TYP. in SUSPEND mode) Applications Notebook computers, LCD TVs, etc. Absolute maximum ratings(Ta=25) Parameter Ratings Unit Supply voltage +6.0 V *1 Power dissipation 1100 mW Storage temperature -55 ~ +125 Operating temperature -10 ~ +70 *1 Reduced by 11 mW/ at 25 or higher, when mounting on a 70mmX70mmX1.6mm PCB board). Operating Conditions (Ta=25) Parameter Ratings Unit Supply voltage +3.0~+5.5 V * This IC is not designed to be radiation-resistant. www.rohm.com 2014.04 - Rev.B 1/10 2014 ROHM Co., Ltd. All rights reserved. Technical Note BH7884EFV Electrical characteristics (Unless otherwise noted, V =3.3V, Ta=25, f=1kHz) CC Limits Parameter Symbol Unit Condition Min. Typ. Max. 1 CHIP Circuit current ACTV IA - 9.0 18.0 mA No signal ACTIVE Circuit current SPND Is - 0.2 10.0 A No signal SUSPEND SP AMP Voltage gain1 G1 9.0 12.0 15.0 dBSE, Vin=-18dBV,RL=8 SP Voltage gain2 G2 15.2 18.2 21.2 dBBTL, Vin=-18dBV SP Distortion D - 0.1 1.0 % BTL, Vin=-18dBV SP Maximum output level V 2.2 5.2 - dBVBTL, DSP=1% OSP Output noise level V - -97 -80 dBVSE, DIN-Audio NSP Cross talk CT - -90 -80 dBV SE, Vin=-18dBV, DIN-Audio SP Output level on mute MT - -102 -80 dBVBTL, Vin=-18dBV SP HP AMP Voltage gain 3 G 2.6 5.6 8.6 dBVOL:MAX, R =10k ,Vin=-12dBV HP L Voltage gain 4 G -10 -7 -4 dBVOL:MAX, R =32,Vin=-12dBV HP L Distortion D - 0.025 0.1 % VOL:MAX, R =32,Vin=-8dBV HP L Variable width of volume G 70 100 - dB VOL:MIN ~ MAX, RL=32 HP Maximum output level V -2.0 1.0 - dBV VOL:MAX, DHP=1%, RL=10k OHP Output noise level V - -98 -80 dBVVOL:MAX, R =32, DIN-Audio NHP L VOL:MAX, R =32,Vin=-12dBV L Cross talk CT - -98 -80 dBV HP DIN-Audio VOL:MAX, R =32,Vin=-12dBV L Output level on mute MT - -110 -80 dBV HP DIN-Audio BEEP AMP Output voltage level V 0.8 1.25 - Vpp Vin=1.3dBV, f=1kHz, 20MHzLPF BP BIAS Output voltage level V 1.4 1.7 2.0 V No Signal BIAS CTRL Active mode. ACTIVE mode V V-0.3 - V V 11H CC CC Hold Voltage of 11pin. Suspend mode. SUSPEND mode V GND - 0.3 V 11L Hold Voltage of 11pin. SP / ON mode. SP/ON mode V V-0.3 - V V 2H CC CC Hold Voltage of 2pin. SP/OFF mode. SP/OFF mode V GND - 0.3 V 2L Hold Voltage of 2pin. SP / Bass Boost mode. BASS-BOOST/ON mode V V-0.7 - V V 4H CC CC Hold Voltage of 4pin. SP / Non Boost mode. BASS-BOOST/OFF mode V GND - 0.7 V 4L Hold Voltage of 4pin. SP / STEREO mode. STEREO mode V V-0.7 - V V 3H CC CC Hold Voltage of 3pin. SP / MONO mode. MONO mode V GND - 0.7 V 3L Hold Voltage of 3pin. HP / Active mode. ACTIVE mode V V-0.7 - V V 10H CC CC Hold Voltage of 10pin. HP / MUTE mode. MUTE mode V GND - 0.7 V 10L Hold Voltage of 10pin. PSRR f=100Hz, 0.3Vpp, SIN Input Ripple rejection ratio G - -64 - dBV PR SPOUT monitor, DIN-Audio www.rohm.com 2014.04 - Rev.B 2/10 2014 ROHM Co., Ltd. All rights reserved.