Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Audio amplifier Headphones (2-channel, stereo) Class AB WQFN 16 (3x3)

FEATURES

DESCRIPTION

APPLICATIONS

INR+

INR-

INL+

INL-

PGND

SGND

OUTR

HPVSS

CPP CPN

VDD

HPVDD

OUTL

TPA6135A2

VBAT

CODEC

OUTR+

OUTR-

OUTL+

OUTL-

GAIN

ENABLE EN

HI-Z

HI-ZMODE

GAIN

TPA6135A2

www.ti.com

.................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009

DIRECTPATH™ Stereo Headphone Amplifier

With Differential Input and HI-Z Mode

• Patented DirectPath™ Technology Eliminates

Need for DC-Blocking Capacitors

The TPA6135A2 (sometimes referred to as TPA6135)

is a DirectPath™ stereo headphone amplifier that

– Outputs Biased at 0 V

eliminates the need for external dc-blocking output

– Excellent Low Frequency Fidelity

capacitors. Differential stereo inputs and built-in

• Active Click and Pop Suppression

resistors set the device gain, further reducing external

• HI-Z Output Mode component count. Gain is selectable at 0 dB or 6 dB.

The amplifier drives 25 mW into 16 Ω speakers from

• 2.1 mA Typical Supply Current

a single 2.3 V supply. The TPA6135A2 (TPA6135)

• Fully Differential or Single-Ended Inputs

provides a constant maximum output power

– Built-In Resistors Reduces Component

independent of the supply voltage, thus facilitating the

design for prevention of acoustic shock.

Count

– Improves System Noise Performance

The TPA6135A2 (TPA6135) features HI-Z mode

which can set the outputs to a high impedance

• Constant Maximum Output Power from 2.3 V

configuration. The fully differential inputs reduce

to 5.5 V Supply

system noise pickup between the audio source and

– Simplifies Design to Prevent Acoustic

the headphone amplifier. The high power supply

Shock

noise rejection performance and differential

• Improved RF Noise Immunity

architecture provide increased RF noise immunity.

For single-ended input signals, connect INL+ and

• Microsoft

Windows Vista

Compliant

INR+ to ground.

• High Power Supply Noise Rejection

The device has built-in pop suppression circuitry to

– 100 dB PSRR at 217 Hz

completely eliminate disturbing pop noise during

– 90 dB PSRR at 10 kHz

turn-on and turn-off. The amplifier outputs have

• Wide Power Supply Range: 2.3 V to 5.5 V

short-circuit and thermal-overload protection along

with ± 8 kV HBM ESD protection, simplifying end

• Gain Settings: 0 dB and 6 dB

equipment compliance to the IEC 61000-4-2 ESD

• Short-Circuit and Thermal-Overload Protection

standard.

• ± 8 kV HBM ESD Protected Outputs

The TPA6135A2 (TPA6135) operates from a single

• Small Package Available

2.3 V to 5.5 V supply with 2.1 mA of typical supply

– 16-Pin, 3 mm × 3 mm Thin QFN

current. Shutdown mode reduces supply current to

less than 1 µ A.

• Smart Phones / Cellular Phones

• Notebook Computers

• CD / MP3 Players

• Portable Gaming

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2 DirectPath is a trademark of Texas Instruments.

3 Windows Vista is a trademark of Microsoft Corporation.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (23 pages)

PAGE 1
TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 DIRECTPATH™ Stereo Headphone Amplifier With Differential Input and HI-Z Mode FEATURES 1 • Patented DirectPath™ Technology Eliminates Need for DC-Blocking Capacitors – Outputs Biased at 0 V – Excellent Low Frequency Fidelity • Active Click and Pop Suppression • HI-Z Output Mode • 2.
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TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. FUNCTIONAL BLOCK DIAGRAM VDD HPVDD Supply Control 2.
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TPA6135A2 www.ti.com ..................................................................................................................................................
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TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com BOARD LAYOUT CONCEPT Enable Control 13 14 15 16 To Battery 1 12 Soldered / Electrical Float or GND 2 Matched Board Layout for Differential Input Signals 2.2 mF 2.
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TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 DISSIPATION RATINGS TABLE (1) PACKAGE TA ≤ 25°C POWER RATING RTE (QFN) 2567 mW DERATING FACTOR (1) TA = 70°C POWER RATING TA = 85°C POWER RATING 1643 mW 1335 mW 48.
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TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com OPERATING CHARACTERISTICS VDD = 3.
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TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 TYPICAL CHARACTERISTICS TA = 25°C, VDD = 3.6 V, Gain = 0 dB, EN = 3.6 V, CHPVDD = CHPVSS = 2.
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TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com TYPICAL CHARACTERISTICS (continued) TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 1 THD+N - Total Harmonic Distortion + Noise - % THD+N - Total Harmonic Distortion + Noise - % 1 RL = 32 W, VDD = 3.6 V PO = 1 mW per Channel 0.
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TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 TYPICAL CHARACTERISTICS (continued) OUTPUT VOLTAGE vs SUPPLY VOLTAGE SUPPLY VOLTAGE REJECTION RATIO vs FREQUENCY 2 VO - Output Voltage - Vrms 1.6 1.4 Load = 600 W 1.2 1 Load = 32 W 0.8 0.6 Load = 16 W 0.4 0.2 0 2.5 3 3.5 4 4.
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TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com TYPICAL CHARACTERISTICS (continued) CROSSTALK vs FREQUENCY OUTPUT SPECTRUM vs FREQUENCY 0 -10 RL = 16 W, Power = 15 mW, VDD = 3.6 V -40 Crosstalk - dB Single Channel, Load = 16 W, VDD = 3.
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TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 APPLICATION INFORMATION APPLICATION CIRCUIT 0.22 µF x 4 INR+ OUTR INRTPA2012D2 INL+ OUTL INL- 0.22 µF x 4 ABB or TLV320AIC33 TLV320AIC3104 TLV320DAC32 PCM1774 OUTR+ INR+ OUTR– INR- OUTR OUTL+ INL+ OUTL OUTL– INL- TPA6135A2 SGND ENABLE HI-Z GAIN VBAT 2.
PAGE 12
TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com GAIN CONTROL The TPA6135A2 has two gain settings which are controlled with the GAIN pin. The following table gives an overview of the gain function. GAIN VOLTAGE AMPLIFIER GAIN ≤ 0.6 V 0 dB ≥ 1.3 V 6 dB Table 1.
PAGE 13
TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 HEADPHONE AMPLIFIERS Single-supply headphone amplifiers typically require dc-blocking capacitors to remove dc bias from their output voltage. The top drawing in Figure 27 illustrates this connection.
PAGE 14
TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com Conventional CO VOUT CO VOUT GND Capless VOUT VOUT GND VBIAS DirectPath™ VDD VOUT GND VSS Figure 27.
PAGE 15
TPA6135A2 www.ti.com .................................................................................................................................................. SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 RF AND POWER SUPPLY NOISE IMMUNITY The TPA6135A2 employs a new differential amplifier architecture to achieve high power supply noise rejection and RF noise rejection. RF and power supply noise are common in modern electronics.
PAGE 16
TPA6135A2 SLOS623A – FEBRUARY 2009 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com POWER SUPPLY AND HPVDD DECOUPLING CAPACITORS AND CONNECTIONS The TPA6135A2 DirectPath headphone amplifier requires adequate power supply decoupling to ensure that output noise and total harmonic distortion (THD) remain low.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPA6135A2RTER WQFN RTE 16 3000 330.0 12.4 3.3 3.3 1.0 8.0 12.0 Q2 TPA6135A2RTER WQFN RTE 16 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 TPA6135A2RTET WQFN RTE 16 250 180.0 12.4 3.3 3.3 1.0 8.0 12.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 24-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPA6135A2RTER WQFN RTE 16 3000 370.0 355.0 55.0 TPA6135A2RTER WQFN RTE 16 3000 367.0 367.0 35.0 TPA6135A2RTET WQFN RTE 16 250 195.0 200.0 45.0 TPA6135A2RTET WQFN RTE 16 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.