Datasheet

THS6226

SBOS499C –JANUARY 2011–REVISED APRIL 2011

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QUIESCENT CURRENT

The quiescent current of the THS6226 is dissipated in two main modules of the THS6226: the class AB and the

charge pump. B4 and B5 select the mode of operation, class AB operating with or without the charge pump

enabled, powering down the entire port, or operating in a line termination mode. Table 4 lists the details on each

bit functionality and the approximate quiescent current.

The class AB quiescent current is set by bits B6 to B9, using B4 and B5 for the power-down function, and B2 and

B3 for channel select. The approximate quiescent current for the amplifier core is shown in Table 3.

Table 3. Class AB Quiescent Current

APPROXIMATE

B6 (D3) B7 (D2) B8 (D1) B9 (D0) QUIESCENT CURRENT SETTING I

(mA/Port)

0 0 0 0 ADSL2+ mode 7.6

0 0 0 1 8.7

0 0 1 0 Profile 8b mode 9.8

0 0 1 1 10.9

0 1 0 0 Profile 17a mode 12

0 1 0 1 13

0 1 1 0 14

0 1 1 1 15

1 0 0 0 16

1 0 0 1 17

1 0 1 0 Profile 30a mode 18

1 0 1 1 19

1 1 0 0 20

1 1 0 1 21

1 1 1 0 22

1 1 1 1 23

The various power modes are shown in Table 4. For all modes, when B6 through B9 are not defined, set B9 =

B8 = B7 = B6 = 0 to achieve the lowest power dissipation possible.

Table 4. Power Modes

APPROXIMATE I

B4 (PD1) B5 (PD0) POWER-DOWN MODE (mA/Port)

0 0 Power-down (B9, B8, B7, B6 = 0) 0.85

0 1 Line termination mode (B9, B8, B7, B6 = 0) 4.4

1 0 Class AB driver I

set by B6 to B9, class H disabled —

1 1 Class AB driver I

set by B6 to B9, class H enabled —

Product Folder Link(s): THS6226