PDF TS4851 Data sheet ( Hoja de datos )

Número de pieza	TS4851
Descripción	MONO 1 W SPEAKER AND STEREO 160 mW HEADSET BTL DRIVERS WITH DIGITAL VOLUME CONTROL
Fabricantes	STMicroelectronics
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No Preview Available ! TS4851 MONO 1 W SPEAKER AND STEREO 160 mW HEADSET BTL DRIVERS WITH DIGITAL VOLUME CONTROL s Operating from VCC = 3 V to 5.5 V s Rail to rail input/output s Speaker driver with 1 W output @ Vcc = 5 V, THD+N = 1%, F = 1 kHz, 8 Ω load s Headset drivers with 160 mW output @ Vcc = 5 V, THD+N = 1%, F = 1 kHz, 32 Ω load s Headset output is 30 mW in stereo @ Vcc = 3 V s THD+N < 0.5% Max @ 20 mW into 32 Ω BTL, 50 Hz < Frequency < 20 kHz s 32-step digital volume control from - 34.5 dB to +12 dB s +6 dB power up volume and full standby s 8 different output modes s Pop & click reduction circuitry s Low shutdown current (< 100 nA) s Thermal shutdown protection s Flip-chip package 18 x 300 µm bumps DESCRIPTION The TS4851 is a low power audio amplifier that can drive either both a mono speaker or a stereo headset. To the speaker, it can deliver 400 mW (typ.) of continuous RMS output power into an 8 Ω load with a 1% THD+N value. To the headset driver, the amplifier can deliver 30 mW (typ.) per channel of continuous average power into a stereo 32 Ω bridged-tied load with 0.5% THD+N @ 3.3 V. This device features a 32-step digital volume control and 8 different output selections. The digital volume and output modes are controlled through a three-digit SPI interface bus. APPLICATIONS s Mobile Phones ORDER CODE Part Number Temperature Range TS4851IJT -40, +85°C Package J • J = Flip Chip Package - only available in Tape & Reel (JT)) PIN CONNECTIONS (top view) TS485IJT - Flip Chip Pin Out (top view) R OUT< - R IN PHONE IN BYPASS R OUT + L IN SPKR OUT+ GND VCC L OUT + VCC GND NC SPKR OUT - L OUT - DATA ENB CLK April 2003 Revision B 1/26 1 page SPI Bus Interface 2.3 SPI Timing Diagram TS4851 5/26 5 Page Electrical Characteristics Figure 7: Spkout THD+N vs. output power (output mode 3, G=+12dB) 10 RL = 8Ω Out. Mode = 3 G = +12dB BW < 125kHz Tamb = 25°C 1 Vcc=3V F=20kHz Vcc=5V F=20kHz 0.1 Vcc=3V F=1kHz 1E-3 0.01 0.1 Output Power (W) Vcc=5V F=1kHz 1 Figure 8: Spkout THD+N vs. output power (output mode 3, G=+12dB) 10 RL = 16Ω Out. Mode = 3 G = +12dB BW < 125kHz Tamb = 25°C 1 Vcc=3V F=20kHz Vcc=5V F=20kHz 0.1 1E-3 Vcc=3V F=1kHz 0.01 0.1 Output Power (W) Vcc=5V F=1kHz 1 Figure 9: HDout THD+N vs. output power (output mode 4, G=+12dB) 10 RL = 16Ω Out. Mode = 4 G = +12dB BW < 125kHz Tamb = 25°C 1 Vcc=5V F=20kHz Vcc=3V F=20kHz 0.1 1E-3 Vcc=3V F=1kHz 0.01 0.1 Output Power (W) Vcc=5V F=1kHz TS4851 Figure 10: HDout THD+N vs. output power (output mode 4, G=+12dB) 10 RL = 32Ω Out. Mode = 4 G = +12dB BW < 125kHz Tamb = 25°C 1 Vcc=5V F=20kHz Vcc=3V F=20kHz 0.1 1E-3 Vcc=3V F=1kHz 0.01 0.1 Output Power (W) Vcc=5V F=1kHz Figure 11: Spkout THD+N vs. frequency (output modes 1, 7) 10 RL = 4Ω Out. Mode = 1, 7 BW < 125kHz Tamb = 25°C 1 Vcc=3V P=450mW Vcc=5V P=1.1W 0.1 0.01 20 100 1000 Frequency (Hz) 10000 20k Figure 12: Spkout THD+N vs. frequency (output modes 1, 7) 10 RL = 8Ω Out. Mode = 1, 7 BW < 125kHz Tamb = 25°C 1 Vcc=3V P=350mW Vcc=5V P=0.8W 0.1 0.01 20 100 1000 Frequency (Hz) 10000 20k 11/26 11 Page

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