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ISL54004 датащи(PDF) 6 Page - Intersil Corporation |
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ISL54004 датащи(HTML) 6 Page - Intersil Corporation |
6 / 13 page 6 FN6513.2 October 30, 2007 ISL54004 Typical Application Circuit and Block Diagram Detailed Description The Intersil ISL54004 device is an integrated audio power amplifier system designed to provide quality audio, while requiring minimal external components. Low 0.4% THD+N ensures clean, low distortion amplification of the audio signals. It is designed to operate from a single +2.7V to +5V power supply. It is offered in a 20 Ld 4x4 TQFN package. Targeted applications include battery powered equipment such as cell-phones, MP3 players, and games/toys. The ISL54004 part contains one class AB BTL type power amplifier for driving an 8 Ω mono speaker and two class AB single-ended (SE) type amplifiers for driving 16 Ω or 32Ω headphones. The BTL when using a 5V supply is capable of delivering 800mW (typ) with 0.4% THD+N and 941mW (typ) with 1% THD+N of continuous average power into a stereo 8 Ω BTL speaker load. When the speaker load is connected across the positive and negative terminals of the BTL driver the voltage is doubled across the load and the power is quadrupled. Each SE amplifier when using a 5V supply is capable of delivering 15mW (typ) with 0.07% THD+N and 50mW (typ) with 0.3% THD+N of continuous average power into a 32 Ω headphone speaker. When in Mono Mode (BTL driver active) the part automatically mixes the left and right audio inputs and sends the combined signal to the BTL driver. In Headphone Mode the right channel input is sent to the right headphone speaker and the left channel is sent to the left headphone speaker. The ISL54004 features headphone sense input circuitry that detects when a headphone jack has been inserted and automatically switches the audio inputs from the mono BTL output driver to the headphone drivers. It also has a logic control pin (HO) that can override the sense input circuitry. The ISL54004 has a four-level programmable gain stage to boost the audio signal. The part requires no external gain setting resistors. When GSO = GS1 = Low a driver will have a gain of 1V/V (0dB). When GSO = High, GS1 = Low a driver will have a gain of 1.2V/V (1.5dB). When GSO = Low, GS1 = High a driver will have a gain of 2V/V (6dB). When GSO = High, GS1 = High a driver will have a gain of 4V/V (12dB). When the speaker is connected across the SPK+ terminal and SPK- terminal of the mono BTL driver you get an additional gain of 2V/V (6dB) due to the BTL configuration. The overall gain will be 2 times the values discussed above. For example with GS1 = GS0 = High the overall gain will be 2 x 4 = 8V/V (18dB). The part features low power shutdown, thermal overload protection and click and pop suppression. The click and pop circuitry prevents click and pops at the speakers when transitioning in and out of shutdown. ROUTER/ CLICK LOGIC CONTROL BIAS THERMAL PROTECTION SD HO INR INL REF SPK+ SPK- HpR HpL GND VDD CREF MICRO RIGHT AUDIO LEFT AUDIO SE SE BTL GSO HD HEADPHONE JACK 10k Ω VDD GAIN GS1 1µF 0.1µF 0.22µF 0.22µF 100k Ω AND POP CONTROLLER SWITCHER ISL54004 |
Аналогичный номер детали - ISL54004 |
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Аналогичное описание - ISL54004 |
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