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Part: TS4871
Category:
Analog & Mixed-Signal Processing
-> Amplifiers
-> Audio/Power Amplifiers
Description: 1W Mono Audio Amplifier With Standby Active High
Company: ST Microelectronics, Inc.
Datasheet: Download TS4871 datasheet File size : 339 kB
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Datasheet text preview:
TS4871
OUTPUT RAIL TO RAIL 1W AUDIO POWER AMPLIFIER WITH STANDBY MODE
s OPERATIN G FROM VCC = 2.5V to 5.5V s 1W RAIL TO RAIL OUTPUT POWER @
Vcc=5V, THD=1%, f=1kHz, with 8 Load
TS4871IST - MiniSO8
1 2 3 4 8 7 6 5
PIN CONNECTIONS (Top View)
s ULTRA LOW CONSUMPTION IN STANDBY
MODE (10nA)
Standby Bypass VIN+ VINVOUT2 GND VCC VOUT1
s 75dB PSRR @ 217Hz from 5V to 2.6V s ULTRA LOW POP & CLICK s ULTRA LOW DISTORTION (0.1%) s UNITY GAIN STABLE s AVAILABLE IN SO8, MiniSO8 & DFN8 3x3mm
DESCRIPTION
TS4871ID-TS4871IDT - SO8
Standby
1 2 3 4
8 7 6 5
VOUT2 GND VCC VOUT1
The TS4871 is an Audio Power Amplifier capable of delivering 1W of continuous RMS Ouput Power into 8 load @ 5V. This Audio Amplifier is exhibiting 0.1% distortion level (THD) from a 5V supply for a Pout = 250mW RMS. An external standby mode control reduces the supply current to less than 10nA. An internal thermal shutdown protection is also provided. The TS4871 has been designed for high quality audio applications such as mobile phones and to minimize the number of external components. The unity-gain stable amplifier can be configured by external gain setting resistors. APPLICATIONS
Bypass VIN+ VIN-
TS4871IQT - DFN8
S T A NDB Y BYPASS V I N+ V I N-
1 2 3 4
8 7 6 5
V O UT 2 GND Vcc VOUT 1
s Mobile Phones (Cellular / Cordless) s Laptop / Notebook Computers s PD As s Portable Audio Devices
ORDER CODE
Part Number TS4871 Temperature Range: I -40, +85°C Package Marking D · · · S Q 4871I 4871
Vcc Audio Input
TYPICAL APPLICATION SCHEMATIC
Cfeed Rfeed Vcc 6 Vcc Cs
Rin Cin
4 3
VinVin+
+
Vout1 5
RL 8 Ohms Av=-1 + Vout2 8
2 Rstb 1
Bypass Standby Bias GND
TS4871
Cb
7
MiniSO & DFN only available in Tape & Reel with T suffix(IST & IQT) D = Small Outline Package (SO) - also available in Tape & Reel (DT)
June 2003
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TS4871
AB SOLUTE MAXIMUM RATINGS
Symbol VCC Vi Toper Tstg Tj Rthja Supply voltage Input Voltage
2) 1)
Parameter
Value 6 GND to VCC -40 to + 85 -65 to +150 150 175 215 70 Internally Limited4) 2 200 Class A 260
Unit V V °C °C °C °C/W
Operating Free Air Temperature Range Storage Temperature Maximum Junction Temperature Thermal Resistance Junction to Ambient 3) SO8 MiniSO8 QNF8 Power Dissipation
Pd
ESD Human Body Model ESD Machine Model Latch-up Latch-up Immunity Lead Temperature (soldering, 10sec)
1. 2. 3. 4. All voltages values are measured with respect to the ground pin. The magnitude of input signal must never exceed VCC + 0.3V / G ND - 0.3V Dev ice is protected in case of over temperature by a thermal shutdown active @ 150°C. Exceeding the power derating curves during a long period, involves abnormal operating condition.
kV V °C
OPERATING CONDITIONS
Symbol VCC VICM VSTB RL Rthja Supply Voltage Common Mode Input Voltage Range Standby Voltage Input : Device ON Device OFF Load Resistor Thermal Resistance Junction to Ambient SO8 MiniSO8 DFN8 2)
1)
Parameter
Value 2.5 to 5.5 GND to VCC - 1.2V GND VSTB 0.5V VCC - 0.5V VSTB VCC 4 - 32 150 190 41
Unit V V V °C/W
1. This thermal resistance can be reduced with a suitable PCB layout (see Power Derating Curves Fig. 20)
2. When mounted on a 4 layers PCB
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TS4871
ELECTRICAL CHARACTERISTICS VCC = +5V, GND = 0V, Tamb = 25°C (unless otherwise specified)
Symbol ICC ISTANDBY Voo Po THD + N PSRR M GM GBP Parameter Supply Current No input signal, no load Standby Current 1) No input signal, Vstdby = Vcc, RL = 8 Output Offset Voltage No input signal, RL = 8 Output Power THD = 1% Max, f = 1kHz, RL = 8 Total Harmonic Distortion + Noise Po = 250mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8 Power Supply Rejection Ratio2) f = 217Hz, RL = 8, RFeed = 22K, Vripple = 200mV rms Phase Margin at Unity Gain RL = 8, CL = 500pF Gain Margin RL = 8, CL = 500pF Gain Bandwidth Product RL = 8 Min. Typ. 6 10 5 1 0.15 75 70 20 2 Max. 8 1000 20 Unit mA nA mV W % dB Degrees dB MHz
1. Standby mode is actived when Vstdby is tied to Vcc 2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz
VCC = +3.3V, GND = 0V, Tamb = 25°C (unless otherwise specified)3)
Symbol ICC ISTANDBY Voo Po THD + N PSRR M GM GBP Parameter Supply Current No input signal, no load Standby Current 1) No input signal, Vstdby = Vcc, RL = 8 Output Offset Voltage No input signal, RL = 8 Output Power THD = 1% Max, f = 1kHz, RL = 8 Total Harmonic Distortion + Noise Po = 250mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8 Power Supply Rejection Ratio2) f = 217Hz, RL = 8, RFeed = 22K, Vripple = 200mV rms Phase Margin at Unity Gain RL = 8, CL = 500pF Gain Margin RL = 8, CL = 500pF Gain Bandwidth Product RL = 8 Min. Typ. 5 .5 10 5 450 0.15 75 70 20 2 Max. 8 1000 20 Unit mA nA mV mW % dB Degrees dB MHz
1. Standby mode is actived when Vstdby is tied to Vcc 2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz 3. All electrical values are made by correlation between 2.6V and 5V measurements
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