TAS5715 datasheet(44/74 Pages) TI

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HP/

(SE/

)

SPKR

BTL

VALID

PWM_A(L+)

PWM_C(R+)

PWM_B(L–)

PWM_D(R–)

I C:SCL

SDA

HPSD

FAULT

(A0/

)

PDN

(PDN-HPSD)

Enable

FAULT

HPL/R

(exitSDHPamp)

T0453-01

(exitSDHP)

(HPamp)

=1Output

FAULT

Hi-Z(Ext.Pulldown)

TAS5715

SLOS645 – AUGUST 2010

www.ti.com

Headphone Configuration

• Registers 0x07–0x0B

Master/channel headphone volume

• Register 0x19

SDG = 0x30 or 0x00 (PWM3/4 in SDG)

• Registers 0x11–0x12

ICD1/2 = {0xAC, 0x54}

• Register 0x1A<7>

Clear bit for headphone mode (HP/SPKR = 0)

• Register 0x1A<4:0>

Set to 0 0000 for 0-ms start/stop period

• Register 0x20<23>

Clear bit for Ch1 AD mode

• Register 0x20<19>

Clear bit for Ch2 AD mode

• Register 0x46<1:0>

Clear both bits to disable DRC1 and DRC2

• Register 0x50<7>

Set bit to disable EQ

Headphone Mode Power Down

PARAMETE

DESCRIPTION

MIN

TYP

MAX

UNIT

t(PDN-HPSD)

Delay from power-down event to headphone amplifier shutdown assertion

Exit shutdown wait time before enabling external headphone amp (t(HPchg)

t(exitSDHP)

1 + 1.3 × t(HPchg)

given by register 0x1A<6:5>)

Headphone amp exit shutdown wait time before unmuting (t(HPamp) given by

1 + 1.3 ×

t(exitSDHPamp)

t(HPamp)

Headphone amp enable/disable wait time (given by register 0x1C<7:4>)

t(HPamp)

Figure 58. Headphone Control Power Down

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