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LM4802B Datasheet(PDF) 1 Page - Texas Instruments |
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LM4802B Datasheet(HTML) 1 Page - Texas Instruments |
1 / 24 page NC 1 NC 2 NC 3 VDD 4 NC 5 Shutdown 1 6 GND 7 IN+ 21 GND 20 Bypass 19 Shutdown 2 18 Vo2 17 NC 16 NC 15 8 9 10 11 12 13 14 28 27 26 25 24 23 22 LM4802B, LM4802BLQBD www.ti.com SNAS243C – MAY 2004 – REVISED MARCH 2005 LM4802B Boomer™ Audio Power Amplifier Series Audio Power Amplifier with Boost Converter to Drive Ceramic Speakers Check for Samples: LM4802B, LM4802BLQBD 1 FEATURES DESCRIPTION The LM4802B integrates a Boost Converter with an 23 • Pop & Click Circuitry Eliminates Noise During Audio Power Amplifier to drive Ceramic Speakers in Turn-On and Turn-Off Transitions portable applications. When powered by a 3V supply, • Low, 2 μA (Max) Shutdown Current it is capable of forcing 12Vp-p across a 2 μF + 30Ω • Low, 12mA (Typ) Quiescent Current bridge-tied-load (BTL) with less than 1% THD+N. • 12Vp-p Mono BTL Output, Load = 2 μF + 30Ω, Boomer audio power amplifiers were designed VDD = 3V specifically to provide high quality output power with a minimal amount of external components. The • Short Circuit Protection LM4802B does not require bootstrap capacitors, or • Unity-Gain Stable snubber circuits. Therefore it is ideally suited for • External Gain Configuration Capability portable applications requiring high output voltage and minimal size. APPLICATIONS The LM4802B features a low-power consumption • Cellphone shutdown mode. Additionally, the LM4802B features an internal thermal shutdown protection mechanism. • PDA The LM4802B contains advanced pop & click circuitry KEY SPECIFICATIONS that eliminates noises which would otherwise occur during turn-on and turn-off transitions. • Quiescent Power Supply Current, 12mA (Typ) The LM4802B is unity-gain stable. Its gain is set by • BTL Voltage Swing external resistors. (2 μF + 30Ω load, 1% THD+N, VDD = 3V), 12Vp-p (typ) • Shutdown Current, 2 μA (max) Connection Diagram Figure 1. LM4802BLQ (5x5) Top View See Package Number NJB0028A 1 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. 2 Boomer is a trademark of Texas Instruments. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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