Document
TS4902
300mW at 3.3V SUPPLY AUDIO POWER AMPLIFIER WITH STANDBY MODE ACTIVE LOW
s OPERATING FROM VCC = 2.2V to 5.5V s 0.7W OUTPUT POWER @ Vcc=5V, THD=1%,
f=1kHz, with an 8Ω load PIN CONNECTIONS (top view)
s 0.3W OUTPUT POWER @ Vcc=3.3V,
THD=1%, f=1kHz, with an 8Ω load s ULTRA LOW CONSUMPTION IN STANDBY MODE (10nA) s 77dB PSRR @ 217Hz from 5V to 2.2V s ULTRA LOW POP & CLICK s ULTRA LOW DISTORTION (0.1%) s UNITY GAIN STABLE s AVAILABLE IN MiniSO8 & SO8 DESCRIPTION The TS4902 is an audio power amplifier designed to provide the best price to power ratio while preserving high audio quality. Available in MiniSO8 & SO8 package, it is capable of delivering up to 0.7W of continuous RMS ouput power into an 8Ω load @ 5V. TS4902 is also exhibiting an outstanding 0.1% distortion level (THD) from a 5V supply for a Pout of 200mW RMS. An externally controlled standby mode reduces the supply current to less than 10nA. It also includes an internal thermal shutdown protection. The unity-gain stable amplifier can be configured by external gain setting resistors. APPLICATIONS s Mobile Phones (Cellular / Cordless) s PDAs s Portable Audio Devices ORDER CODE
Part Number TS4902IST TS4902ID Temperature Range -40, +85°C Package
TS4902IS-TS4902IST - MiniSO8
Standby Bypass VIN+ VIN-
1 2 3 4
8 7 6 5
VOUT2 GND VCC VOUT1
TS4902ID-TS4902IDT - SO8
Standby Bypass VIN+ VIN-
1 2 3 4
8 7 6 5
VOUT2 GND VCC VOUT1
TYPICAL APPLICATION SCHEMATIC
Cfeed Rfeed VCC 6 Audio Input Cin 3 Vin+ + RL 8 Ohms VCC AV = -1 2 1 Bypass Standby Bias GND Cb 7 TS4902 + Vout 2 8 Cs
Rin
4
Vin-
-
V C Vout 1 5
ST •
D •
Rstb
S = MiniSO Package (MiniSO) is only available in Tape & Reel (ST) D = Small Outline Package (SO) - also available in Tape & Reel (DT)
January 2002
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TS4902
ABSOLUTE 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 See the power derating curves Fig 20. 2 200 Class A 250
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 Power Dissipation 4)
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 Device is protected in case of over temperature by a thermal shutdown active @ 150°C. Exceeding the power derating curves during a long period, will cause abnormal operation.
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 1) SO8 MiniSO8 Parameter Value 2.2 to 5.5 GND to VCC - 1.5V 1.5 ≤ VSTB ≤ VCC GND ≤ VSTB ≤ 0.5 4 - 32 150 190 Unit V V V Ω °C/W
1. This thermal resistance can be reduced with a suitable PCB layout (see Power Derating Curves)
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TS4902
ELECTRICAL CHARACTERISTICS VCC = +5V, GND = 0V, Tamb = 25°C (unless otherwise specified)
Symbol ICC ISTANDBY Voo Po THD + N PSRR ΦM GM GBP Parameter Supply Current No input signal, no load Standby Current 1) No input signal, Vstdby = GND, RL = 8Ω Output Offset Voltage No input signal, RL = 8Ω Output Power THD = 1% Max, f = 1kHz, RL = 8Ω Total Harmonic Distortion + Noise Po = 250mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8Ω Power Supply Rejection Ratio 2) f = 217Hz, RL = 8Ω, RFeed = 22KΩ, Vripple = 200mV rms Phase Margin at Unity Gain RL = 8Ω, CL = 500pF Gain Margin RL = 8Ω, CL = 500pF Gain Bandwidth Product RL = 8Ω Min. Typ. 6 10 5 0.7 0.15 77 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 GND 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 ΦM GM GBP Parameter Supply Current No input signal, no load Standby Current 1) No input signal, Vstdby = GND, RL = 8Ω Output Offset Voltage No input signal, RL = 8Ω Output Power THD = 1% Max, f = 1kHz, RL = 8Ω Total Harmonic Distortion + Noise Po = 250mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8Ω Power Supply Rejection Ratio 2) f = 217Hz, RL = 8Ω, RFeed = 22KΩ, Vripple = 200mV rms Phase Margin at Unity Gain RL = 8Ω, CL = 500pF Gain Margin RL = 8Ω, CL = 500pF Gain Bandwidth Product RL = 8Ω Min. Typ. 5.5 10 5 300 0.15 77 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 GND 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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TS4902
ELECTRICAL CHARACTERISTICS VCC = 2.6V, GND = 0V, Tamb = 25°C (unless otherwise specified)
Symbol ICC ISTANDBY Voo Po TH.