Compact Headphone Amplifiers Headphone Amplifier Designed for 0.93V Low Voltage Operation No.15102EET01 BU7150NUV Description BU7150NUV is Audio Amplifier designed for Single-cell battery operated audio products (VDD = 0.93 ~ 3.5V, at Ta=0~85C). BU7150NUV can be selected in single-ended mode for stereo headphone and BTL mode for mono speaker operations. For BU7150NUV at VDD = 1.5V, THD+N = 1%, the output power is 14mW at RL = 16 in single-ended mode and the output power is 85mW at RL = 8 in BTL mode. Features 1) Wide battery operation Voltage (0.93V~3.5V, Ta=0~85C) (1.03V~3.5V, Ta= -40~85C) 2) BU7150NUV can be selected in single-ended mode for stereo headphone and BTL mode for mono speaker operation 3) Unity-gain stability 4) Click and pop-noise reduction circuit built-in 5) Shutdown mode(Low power mode) 6) High speed turn-on mute mode 7) Thermal shutdown protection circuit 8) Power-on reset circuit not sensed during start-up slew rate of supply voltage 9) Small package (VSON010V3030) Applications Noise-canceling headphone, IC recorder, Mobile phone, PDA, Electronic toys etc.. Absolute Maximum Ratings (Ta=25) Parameter Symbol Ratings Unit Supply Voltage VDD 4.5 V Input Voltage VIN VSS-0.3~VDD+0.3 V Input Current IIN -10~10 mA Power Dissipation PD 560 * mW Storage Temperature Range TSTG -55~+150 C *For operating over 25C, de-rate the value at 5.6mW/C. This value is for IC mounted on 74.2 mm x 74.2mm x 1.6mm glass-epoxy PCB of single-layer. Operating conditions Ratings Parameter Symbol Unit Min. Typ. Max. Operation Temperature Range TOPR -40 - 85 C Supply Voltage (Note 1,2) VDD 0.93 - 3.5 V Note 1: If the supply voltage is 0.93V, BU7150NUV does not operate at less than 0C. If the supply voltage is more than 1.03V, BU7150NUV operates until -40C. (But, it is not the one which guarantees the standard value for electric characteristics.) Note 2: Ripple in power supply line should not exceed 400mV .(VDD=1.5 V, Ta=25C ) P-P www.rohm.com 2015.1 - Rev.E 1/18 2015 ROHM Co., Ltd. All rights reserved. Technical Note BU7150NUV Electrical characteristics Ta=25C, VDD=1.5V, f=1kHz, VSS=GND unless otherwise specified. Limits Parameter Symbol Unit Conditions Min. Typ. Max. No Signal Operating Current IDD - 1 1.4 mA No load, No signal Shutdown Current ISD - 3 9 A SDB Pin=VSS Mute Current IMUTE - 15 - A MUTEB Pin=VSS, SE Output Offset Voltage VOFS - 5 50 mV VOUT1 VOUT2 , No signal 70 85 - mW RL=8, BTL, THD+N=1% Maximum Output Power PO - 14 - mW RL=16, SE, THD+N=1% - 0.2 0.5 % 20kHz LPF, RL=8, BTL, PO=25mW Total Harmonic Distortion +Noise THD+N - 0.1 0.5 % 20kHz LPF, RL=16, SE,PO=5 W Output Voltage Noise VNO - 10 - V 20kHz LPF + A-weight rms Crosstalk CT - 85 - dB RL=16, SE, 1kHz BPF Ripple voltage=200mV , P-P - 62 - dB RL=8, BTL, C =4.7F BYPASS Power Supply Rejection Ratio PSRR Ripple voltage=200mVP-P, - 66 - dB RL=16, SE, C =4.7F BYPASS Input Logic High Level VIH 0.7 - - V MUTEB Pin, SDB Pin Input Logic Low Level VIL - - 0.3 V MUTEB Pin, SDB Pin BTL is BTL-mode when MODE Pin = VDD, SE is single-ended mode when MODE Pin = VSS. Turn-on time in BTL mode is about 11 times faster than single-ended mode. Also, BTL mode does not have MUTE mode. When MUTEB Pin = VSS, then it will be shutdown mode. Block diagram 1 10 IN1 VDD 2 9 SDB OUT1 Control Logic 3 8 MUTEB MODE Bias 4 7 BYPASS OUT2 Generator IN2 5 6 VSS TOP VIEW Fig. 1 Block diagram www.rohm.com 2015.1 - Rev.E 2/18 2015 ROHM Co., Ltd. All rights reserved.