Headphone Amplifiers Standard Headphone Amplifiers No.1 5102E DT02 BH3544F,BH3547F,BH3548F Description BH3544F, BH3547F, BH3548F are headphone amplifiers suitable for portable products. BH3544F, BH3547F, BH3548F has a fixed gain of 6 dB. External resistors for gain setting are not needed. Package of BH3544F, BH3547F, BH3548F is pin-to-pin compatible (SOP8), enable to replace each other easily. BH3544F, BH3547F, BH3548F also has mute functions that make it easy to prevent pop noise when power supply turns on/off. Moreover, thermal shutdown function is built-in.BH3544F, BH3547F can drive 16/32 load, BH3548F can drive 8/16/32 . So, BH3548F is suitable for 8 receiver. Features 1) Built-in mute function for preventing pop noise when power supply turns on/off 2) Built-in thermal shutdown function 3) BH3544F, BH3547F, BH3548F are pin-to-pin compatible 4) SOP8 small package Applications TV, Desktop PC, Notebook PC, Camcorder and other equipment having headphone output Line up Part No. BH3544F BH3547F BH3548F Unit Supply voltage +2.8 +6.5 +4.5 +6.5 +4.0 +5.5 V Quiescent current 7.0 3.7 6.5 mA Amplifier gain 6 dB Output RL=16 62 77 62 mW load impedance 16 / 32 8/16/32 Operating temperature range -25 +75 -40 +85 Absolute maximum ratings(Ta=25C) Ratings Parameter Symbol Unit BH3544F,BH3547F,BH3548F Applied voltage VCC 7.0 V *1 Power dissipation Pd 550 mW Storage temperature Tstg -55+125 C *1 Derating is done at 5.5mW/C above Ta=25C. (When mounted on a 70mm70mm1.6mm PCB board, FR4) Operating conditions (Ta=25C) Limits Parameter Symbol Unit BH3544F BH3547F BH3548F Supply voltage VCC +2.8 +6.5 +4.5 +6.5 +4.0 +5.5 V Temperature Range Topr -25 +75 -40 +85 * These product are not designed for protection against radioactive rays. www.rohm.com 2015.06 - Rev.D 1/8 2015 ROHM Co., Ltd. All rights reserved. Technical Note BH3544F,BH3547F,BH3548F Electrical characteristics (Unless otherwise noted, Ta=25C,VCC=5V,RL=32 ,f=1kHz,BW=400 30kHz, VIN =-6dBV) Limits(TYP.) Parameter Symbol Unit Conditions BH3544F BH3547F BH3548F Quiescent current IQ 7 3.7 6.5 mA VIN=0Vrms Mute pin control voltage H VTMH 1.6< V Mute OFF Mute pin control voltage L VTML <0.3 V Mute ON Gain GVC 6 dB - Gain difference between GVC 0 dB - channels Total harmonic distortion THD 0.02 0.05 0.02 % BW=20 20kHz RL=32,THD<0.1% (BH3541F,BH3544F,BH3548F) Rated output 1 PO1 31 46 31 mW RL=32,THD0.3% (BH3547F) RL=16,THD<0.1% (BH3541F,BH3544F,BH3548F) Rated output 2 PO2 62 77 62 mW RL=16,THD0.5% (BH3547F) RL=8,THD0.25% Rated output 3 PO3 - 120 mW (BH3548F) Output noise voltage VNO -93 dBVBW=2020kHz,Rg=0 Channel separation CS -90 -87 -90 dB Rg=0 Mute attenuation ATT -80 dB Rg=0 Ripple rejection RR -57 dB fRR=100Hz,VRR=-20dBV Input resistance Rin 90 k - Reference data BH3544F BH3544F BH3544F Fig. 1 Quiescent current vs. Fig. 2 in DC current vs. Fig. 3 Output voltage vs. power supply voltage power supply voltage Mute control voltage www.rohm.com 2015.06 - Rev.D 2/8 2015 ROHM Co., Ltd. All rights reserved.