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TDA8559T
Low-voltage stereo headphone amplifier
Rev. 03 — 15 May 2006 Product data sheets
1. General description
The TDA8559T is a stereo amplifier that operates over a wide supply voltage range from
1.9 V to 30 V and consumes a very low quiescent current. This makes it suitable for
battery fed applications (2 × 1.5 V cells). Because of an internal voltage buffer, this device
can be used with or without a capacitor connected in series with the load. It can be
applied as a headphone amplifier, but a
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 4. Quick reference data Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit Supplies V operating supply voltage 1.9 3 30 V P I total quiescent current open load - 2.75 4 mA q(tot) I standby supply current open load - - 10 μA stb Stereo application P output power THD = 10 % 30 35 - mW o [1] THD total harmonic distortion P = 20 mW; - 0.075 0.15 % o f = 1 kHz i [1] P = 20 mW; - 0.1 - % o f =10kHz i G voltag
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 6. Block diagram V V P2 P1 15 16 1 STANDBY REFERENCE V P 2 50 kΩ + +IN1 - V/I 3 14 - - IN1 OA OUT1 + 50 kΩ 50 kΩ 7 DQC MUTE INPUT 8 LOGIC MODE + 5 11 +IN2 + OUT2 OA - V/I 6 - IN2 - 50 kΩ 50 50 kΩ kΩ V P 100 kΩ 12 4 BUFFER BUFFER SVRR 100 kΩ TDA8559T 9,10 13 mgd115 n.c. GND Fig 1. Block diagram TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheets Rev. 03 — 15 May 2006 3 of 36
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 7. Pinning information 7.1 Pinning STANDBY 1 16 V P1 +IN1 2 15 V P2 - IN1 3 14 OUT1 SVRR 4 13 GND TDA8559T 5 12 +IN2 BUFFER - IN2 6 11 OUT2 10 MUTE 7 n.c. MODE 8 9 n.c. 001aae802 Top view Fig 2. Pin configuration 7.2 Pin description Table 3. Pin description Symbol Pin Description STANDBY 1 standby select +IN1 2 non-inverting input 1 - IN1 3 inverting input 1 SVRR 4 supply voltage ripple rejection +IN2 5 non-inverting input 2 -
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 8. Functional description The TDA8559T contains two amplifiers with differential inputs, a 0.5V output buffer and a P high supply voltage stabilizer. Each amplifier consists of a voltage-to-current converter (V/I), an output amplifier and a common dynamic quiescent current controller. The gain of each amplifier is internally fixed at 26 dB (= 20 ×). The 0.5V output can be used as a P replacement for the single-ended capacitors. The
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 8.4 Dynamic quiescent controller The Dynamic Quiescent Current controller (DQC) gives the advantage of low quiescent current and low distortion. When there are high frequencies in the output signal, the DQC will increase the quiescent current of the two output amplifiers and the buffer. This will reduce the crossover distortion that normally occurs at high frequencies and low quiescent current. The DQC gives output currents tha
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 9. Internal circuitry Table 4. Internal circuits Symbol Pin Equivalent circuit STANDBY 1 V P1 10 kW 12 kW mgd110 +IN1, - IN1, +IN2 2, 3, 5 and 6 V and - IN2 P1 mgd106 SVRR 4 V P1 50 kW 50 kW 50 kW 50 kW mgd107 TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheets Rev. 03 — 15 May 2006 7 of 36
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier Table 4. Internal circuits …continued Symbol Pin Equivalent circuit MUTE 7 V P1 mgd112 MODE 8 V P1 250 kW 1 kW 5 kW mgd113 TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheets Rev. 03 — 15 May 2006 8 of 36
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier Table 4. Internal circuits …continued Symbol Pin Equivalent circuit OUT2 and OUT1 11 and 14 V P1 100 W 50 W buffer output mgd108 BUFFER 12 V P1 buffer output mgd109 V and V 15 and 16 P2 P1 V V P2 P1 2 kW mgd111 TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheets Rev. 03 — 15 May 2006 9 of 36
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 10. Limiting values Table 5. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit V maximum supply voltage (pin 15) - 30 V P2(max) V maximum supply voltage (pin 16) - 18 V P1(max) V maximum input voltage - 18 V i(max) I peak output current repetitive - 150 mA ORM P total power dissipation - 1.19 W tot T ambient temperature - 40 +85 °C amb T storage temperat
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier Table 7. Characteristics …continued V = 3 V; T = 25 °C; f = 1 kHz; unless otherwise specified. P amb i Symbol Parameter Conditions Min Typ Max Unit [3] V noise output voltage -70 85 μV no [3] V noise output voltage in -20 30 μV no(mute) mute [4] V output voltage in mute --30 μV o(mute) V mid-tap voltage 1.4 1.5 1.6 V mt Z input impedance 75 100 125 kΩ i [5] V DC output offset voltage - - 100 mV os [6] SVRR supply voltage ripple
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier The capacitor Cb is recommended for stability improvement. The value may vary between 10 nF and 100 nF. This capacitor should be placed close to the IC between pin 12 and pin 13. 13.2 Heatsink design The standard application is stereo headphone single-ended with a 32 Ω load impedance to buffer (see Figure 9). The headphone amplifier can deliver a peak output current of 150 mA into the load. For the SO16 envelope R = 105 K/W; th
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 13.4 Input configurations The IC can be applied in two ways, ‘input mode low’ and ‘input mode high’. This can be selected by the input mode at pin 8: 1. Input mode low: pin 8 floating: The DC level of the input pins has to be between 0 V and (V - 1.8 V). A DC path to ground is needed. The maximum output voltage is P approximately 2.1 V (RMS). Input configurations illustrated in Figure 3 and Figure 4 should be used. 2. Input mode
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 13.5 Standby/mute 1. The Standby mode (V < 0.5 V) is intended for power saving purpose. Then the total 1 quiescent current is < 10 μA. 2. To avoid ‘pop-noise’ during switch-on or switch-off the IC can be muted (V < 0.5 V). 7 This can be achieved by a ‘soft-mute’ circuit or by direct control from a microcontroller. 13.6 Application 1: SE with loudspeaker capacitor The value of capacitor Cr influences the behavior of the Supply V
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier 13.12 Application 7: Line driver application With the supply voltage connected to pin 15 it is possible to use the head amplifier above the maximum of 18 V to pin 16. The internal supply voltage will be reduced to a maximum of approximately 17 V. This will be convenient in applications where the supply voltage is higher than 18 V, however an output voltage swing that reaches the higher supply voltage is not required. the input
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier +V P V V P2 P1 100 100 μF nF 15 16 STANDBY 1 REFERENCE V P 2 50 kΩ + V/I - IN1 OUT1+- 3 14 - OA + 32 Ω 50 kΩ 50 kΩ MUTE 7 DQC INPUT 8 LOGIC MODE 32 Ω + OUT2 5 11 + OA +- - V/I IN2 6 - 50 kΩ 50 50 kΩ kΩ V P 100 kΩ BUFFER 4 12 SVRR BUFFER 100 kΩ TDA8559T Cb 13 mgd117 GND Fig 9. Application 2; single-ended to buffer (without loudspeaker capacitor) TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Produ
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier +V P V V P2 P1 100 100 μF nF 15 16 STANDBY 1 REFERENCE V P 2 50 kΩ + 32 Ω - V/I IN1 OUT1 3 14 - OA +- + 50 kΩ 50 kΩ MUTE 7 DQC INPUT 8 LOGIC MODE 32 Ω + OUT2 11 5 + OA - + IN2 - V/I 6 - 50 kΩ 50 50 kΩ kΩ V P 100 kΩ BUFFER 4 12 BUFFER SVRR 100 kΩ TDA8559T Cb 13 mgd118 GND Fig 10. Application 3; improved single-ended to buffer (without loudspeaker capacitor) TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights re
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier +V P V V P2 P1 100 100 μF nF 15 16 STANDBY 1 REFERENCE V P 2 50 kΩ + - IN1 V/I OUT1 3 14 - OA + 50 kΩ 50 kΩ MUTE 7 25 Ω DQC INPUT 8 LOGIC MODE + OUT2 5 11 + OA - IN2 V/I 6 - 50 kΩ 50 50 kΩ kΩ V P 100 kΩ BUFFER 4 12 BUFFER SVRR 100 kΩ TDA8559T Cb 13 mgd119 GND Fig 11. Application 4; BTL mono amplifier TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheets Rev. 03 — 15 May 2006 18 of 36
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier +V P V V P2 P1 100 100 μF nF 15 16 STANDBY 1 REFERENCE V P 2 50 kΩ + 1 kΩ - IN1 V/I OUT1 3 14 - OA + 10 μF 50 kΩ 50 kΩ MUTE 7 DQC INPUT 8 LOGIC MODE + OUT2 11 5 + OA - IN2 V/I 10 μF 6 - 1 kΩ 50 kΩ 50 50 kΩ kΩ V P 100 kΩ BUFFER SVRR 4 12 BUFFER 100 Cr 22 μF kΩ TDA8559T Cb 13 mgd120 GND V = 1.9 V to 6 V. P Fig 12. Application 5; line driver application TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
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TDA8559T Philips Semiconductors Low-voltage stereo headphone amplifier +V P V V P2 P1 100 100 μF nF 15 16 STANDBY 1 REFERENCE V P 100 nF 2 50 kΩ + 1 kΩ IN1 - V/I OUT1 3 14 - OA + 10 μF 50 kΩ 50 kΩ 7 DQC 220 INPUT nF MUTE 8 LOGIC MODE 100 nF + OUT2 5 11 + OA IN2 - V/I 10 μF 6 - 1 kΩ 50 kΩ 50 50 kΩ kΩ V P 100 kΩ BUFFER SVRR 4 12 BUFFER 100 22 μF Cr kΩ TDA8559T Cb 13 mgd121 GND V = 6 V to 18 V. P Fig 13. Application 6; line driver application TDA8559_3 © Koninklijke Philips Electronics N.V. 2006.
