TAS5342DDVRG4 datasheet(3/29 Pages) TI

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Protection MODE Selection Pins

Package Heat Dissipation Ratings

(1)

TAS5342

SLAS557B–SEPTEMBER 2007–REVISED OCTOBER 2007

Protection modes are selected by shorting M1, M2, and M3 to VREG or GND.

MODE PINS

Mode Name

PWM Input(1)

Description

BTL mode 1

All protection systems enabled

BTL mode 2

Latching shudown on, PWM activity detector and OLP disabled

BTL mode 3

All protection systems enabled

PBTL mode

1N / 2N(2)

All protection systems enabled

SE mode 1

All protection systems enabled(3)

SE mode 2

Latching shudown on, PWM activity detector and OLP disabled(3)

Reserved

(1) The 1N and 2N naming convention is used to indicate the number of PWM lines to the power stage per channel in a specific mode.

(2) PWM_D is used to select between the 1N and 2N interface in PBTL mode (Low = 1N; High = 2N). PWM_D is internally pulled low in

PBTL mode. PWM_A is used as the PWM input in 1N mode and PWM_A and PWM_B are used as inputs for the 2N mode.

(3) PPSC detection system disabled.

PARAMETER

TAS5342DDV

RθJC (°C/W)—2 BTL or 4 SE channels

1.3

RθJC (°C/W)—1 BTL or 2 SE channel(s)

2.6

RθJC (°C/W)—1 SE channel

5.0

Power Pad area(2)

36 mm2

(1) JC is junction-to-case, CH is case-to-heatsink.

(2) RθCH is an important consideration. Assume a 2-mil thickness of high performance grease with a thermal conductivity at 2.5W/m-K

between the pad area and the heat sink. The RθCH with this condition is 0.6°C/W for the DDV package.

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