Audio Power Amplifier MM3111 MITSUMI Audio Power Amplifier Monolithic IC MM3111 April 16, 2004 Outline This IC is an audio power amp that can operate at low voltage. Operating supply voltage supports 3V and 5V power amp, making it ideal for applications such as mobile phones and other portable communication devices. It is equipped with the capability to provide continuous supply of 1W (Ave) output against 8Ω load from a 5V single power supply with 2% high harmonic distortion (THD+N). MM3111 does not require an output coupling capacitor, so that applications can be configured with the minimum number of external parts. It also includes a shutdown function and can operate with low power consumption when a mute signal is inputted into the SHUTDOWN pin. It also includes a thermal runaway protection function (thermal shutdown) to allow a gain to be set with an external resistor. Features 1. Operating supply voltage 2. Operating ambient temperature 3. Current consumption (no-load) 4. Current consumption during Power Save 5. Maximum output power 1.8~5.5V (supports 3V and 5V) -40~85°C 3.5mA (VDD=3V) typ. 2.0µA max. 1.0W (VDD=5V, THD=2%) 0.31W (VDD=3V, THD=1%) 66dB (f=1kHz, VDD=5V) 6. PSRR 7. No output coupling capacitor required 8. SHUTDOWN pin for both Power Save and mute 9. Thermal shutdown function 10. Mounted in a small package VSOP-8B (0.65 mm pitch) Package VSOP-8B Pin Assignment 8 7 6 5 1 2 3 4 VSOP-8B (TOP VIEW) 1 2 3 4 5 6 7 8 SHUTDOWN BIAS IN (+) IN (-) OUT (+) VDD GND OUT (-) Audio Power Amplifier MM3111 MITSUMI Block Diagram 20kΩ 6 VDD 20kΩ 4 5 IN (-) 0.33µF 20kΩ OUT (+) 20kΩ 8 3 OUT (-) IN (+) BIAS 2 1µF BIAS 7 GND SHUTDOWN 1 8Ω Audio Power Amplifier MM3111 MITSUMI Absolute Maximum Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TaSTG -65~+150 °C Input voltage VIN max. -0.3~VDD+0.3 V Supply voltage VDD 6 V Allowable loss Pd 0.34 (alone) W Ratings Units Recommended Operating Conditions Item Symbol 2.0~5.5 VDD Supply voltage 1.8=Movement V guarantee Operating temperature TOPR -40~+85 °C Electrical Characteristics (Except where noted otherwise, RL=8Ω, f=1kHz) Item Symbol Measurement conditions Min. Typ. Max. Units Current consumption 1 IDD1 VIN=0V, No load 4 8 mA Current consumption 2 IDD2 VIN=0V, RL=8Ω 5 10 mA When power save IPS SHUTDOWN=0V 2 µA Maximum output electric power PO THD+N=2% Ripple rejection PSRR RS=0Ω, VRIPPLE=200mVP-P, CBIAS=1µF Output offset voltage VOFF THD+N THD HPF=400Hz, LPF=30kHz, PO=0.4W 0.1 Current consumption 1 IDD1 VIN=0V, No load 3.5 7 mA Current consumption 2 IDD2 VIN=0V, RL=8Ω 4.5 9 mA When power save IPS SHUTDOWN=0V 2 µA Maximum output electric power PO THD+N=1% Ripple rejection PSRR RS=0Ω, VRIPPLE=200mVP-P, CBIAS=1µF Output offset voltage VOFF THD+N THD HPF=400Hz, LPF=30kHz, PO=0.15W 0.1 % Current consumption 1 IDD1 VIN=0V, No load 2.6 mA When power save IPS SHUTDOWN=0V Maximum output electric power PO THD+N=1% 0.2 W THD+N THD HPF=400Hz, LPF=30kHz, PO=0.1W 0.08 % Ripple rejection PSRR RS=0Ω, VRIPPLE=200mVP-P, CBIAS=1µF 44 dB When VDD=5V 0.8 -50 1.0 W 66 dB 0 50 mV % When VDD=3V 0.28 -50 0.31 W 62 dB 0 50 mV When VDD=2.6V 2 µA