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TS4974 Datasheet(PDF) 1 Page - STMicroelectronics |
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TS4974 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 25 page  May 2007 Rev 4 1/25 25 TS4974 1W differential audio power amplifier with up/down digital volume control pins Features ■ Operates from VCC= 2.5 V to 5.5 V ■ Zero pop & click ■ 1 W output power @ VCC =5V, THD=1%, F = 1 kHz, with 8 Ωload ■ Ultra-low consumption in standby mode (2 µA max.) ■ 85 dB PSRR @ 217Hz ■ 16-step digital volume control ■ Two discrete up and down volume control pins ■ Gain range from -33 dB to + 12 dB ■ Integrated debouncing system ■ Ultra-fast start-up time: 15 ms typ. ■ DFN10 3x3 mm (pitch 0.5) Applications ■ Mobile phones (cellular / cordless) ■ PDAs ■ Laptop/notebook computers ■ Portable audio devices Description At 3.3 V, the TS4974 is a dual power audio amplifier capable of delivering 380 mW of continuous RMS output power into a 8 Ω bridged- tied loads with 1% THD+N. An external standby mode control reduces the supply current to less than 2 µA. An internal over-temperature shutdown protection is provided. The TS4974 has been designed for high quality audio applications such as mobile phones and minimizes the number of external components necessary. The TS4974 features 16-step digital volume control through two discrete Up and Down control pins. The start-up gain is internally fixed to -12 dB. An integrated debounce system prevents voltage spikes on the UP/DOWN pins during volume control mode from being taken into account during a debounce time of 10 ms (typ). Pin connections (top view) DFN10 (3x3) 1 2 3 4 10 BYPASS VIN- UP / DVC VCC STANDBY 5 9 8 7 6 DOWN / DVC GND VIN+ VOUT- VOUT+ 1 2 3 4 10 BYPASS VIN- UP / DVC VCC STANDBY STANDBY 5 9 8 7 6 DOWN / DVC GND VIN+ VOUT- VOUT+ www.st.com |
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