LM4665MM/NOPB

LM4665 www.ti.com LM4665 SNAS146E – FEBRUARY 2002 – REVISED MAY 2013 Filterless High Efficiency 1W Switching Audio Amplifier Check for Samples: LM4665 FEATURES DESCRIPTION • The LM4665 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces parts count, simplifies circuit design, and reduces board area. The LM4665 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators. 1 2 • • • • • • • • No Output Filter Required for Inductive Transducers Selectable Gain of 6dB (2V/V) or 12dB (4V/V) Very Fast Turn On Time: 5ms (typ) User Selectable Shutdown High or Low Logic Level Minimum External Components "Click and Pop" Suppression Circuitry Micro-Power Shutdown Mode Short Circuit Protection DSBGA, WSON, and VSSOP Packages (No Heat Sink Required) APPLICATIONS • • • Mobile Phones PDAs Portable Electronic Devices KEY SPECIFICATIONS • • • • • • Efficiency at 100mW into 8Ω Transducer 75%(typ) Efficiency at 400mW into 8Ω Transducer 80%(typ) Total Quiescent Power Supply Current (3V) 3mA(typ) Total Shutdown Power Supply Current (3V) 0.01µA(typ) Single Supply Range (VSSOP & WSON) 2.7V to 5.5V Single Supply Range (DSBGA) (Note 11) 2.7V to 3.8V The LM4665 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 3V supply, it is capable of driving 8Ω transducer loads at a continuous average output of 400mW with less than 2%THD+N. The LM4665 has high efficiency with an 8Ω transducer load compared to a typical Class AB amplifier. With a 3V supply, the IC's efficiency for a 100mW power level is 75%, reaching 80% at 400mW output power. The LM4665 features a low-power consumption shutdown mode. Shutdown may be enabled by either a logic high or low depending on the mode selection. Connecting the Shutdown Mode pin to either VDD (high) or GND (low) enables the Shutdown pin to be driven in a likewise manner to activate shutdown. The LM4665 has fixed selectable gain of either 6dB or 12dB. The LM4665 has short circuit protection against a short from the outputs to VDD, GND or across the outputs. 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2002–2013, Texas Instruments Incorporated LM4665 SNAS146E – FEBRUARY 2002 – REVISED MAY 2013 www.ti.com Typical Application Figure 1. Typical Audio Amplifier Application Circuit Connection Diagram Figure 2. VSSOP Package – Top View See Package Number DGS Figure 3. 9 Bump DSBGA Package – Top View See Package Number YZR0009 Figure 4. WSON Package – Top View See Package Number NGZ 2 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: LM4665 LM4665 www.ti.com SNAS146E – FEBRUARY 2002 – REVISED MAY 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) (3) Supply Voltage (1) 6.0V −65°C to +150°C Storage Temperature VDD + 0.3V ≥ V ≥ GND - 0.3V Voltage at Any Input Pin (4) Internally Limited ESD Susceptibility (5) 2.0kV ESD Susceptibility (6) 200V Power Dissipation Junction Temperature (TJ) Thermal Resistance 150°C θJA (VSSOP) 190°C/W θJC (VSSOP) 56°C/W θJA (DSBGA) 180°C/W θJA (WSON) (7) θJC (WSON) (7) Soldering Information (1) (2) (3) (4) (5) (6) (7) 63°C/W 12°C/W See the AN-1112 Application Report All voltages are measured with respect to the ground pin, unless otherwise specified. Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance. If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications. The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX–TA)/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4665, TJMAX = 150°C. See the Efficiency and Power Dissipation versus Output Power curves for more information. Human body model, 100 pF discharged through a 1.5 kΩ resistor. Machine Model, 220 pF–240 pF discharged through all pins. The exposed-DAP of the LDA10B package should be electrically connected to GND. Operating Ratings (1) Temperature Range TMIN ≤ TA ≤ TMAX −40°C ≤ TA ≤ 85°C Supply Voltage (DGS & NGZ) 2.7V ≤ VDD ≤ 5.5V Supply Voltage (YZR0009) (Note11) 2.7V ≤ VDD ≤ 3.8V (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance. Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: LM4665 3 LM4665 SNAS146E – FEBRUARY 2002 – REVISED MAY 2013 www.ti.com Electrical Characteristics VDD = 5V (1) (2) (3) The following specifications apply for VDD = 5V, RL = 8Ω + 33µH, measurement bandwidth is