TDA8950 datasheet(13/39 Pages) NXP

13 / 39 page

TDA8950_1

Preliminary data sheet

Rev. 01 — 9 September 2008

13 of 39

NXP Semiconductors

TDA8950

× 150 W class-D power ampliﬁer

11. Static characteristics

[1]

The circuit is DC adjusted at VP = ±12.5 V to ±42.5 V.

[2]

With respect to SGND (0 V).

[3]

The transition between Standby and Mute mode has hysteresis, while the slope of the transition between Mute and Operating mode is

determined by the time-constant of the RC-network on pin MODE; see Figure 8.

[4]

DC output offset voltage is gradually applied to the output during the transition between the Mute and Operating modes. The slope

caused by any DC output offset is determined by the time-constant of the RC-network on pin MODE.

[5]

At a junction temperature of approximately Tact(th_fold) − 5 °C the gain reduction will commence and at a junction temperature of

approximately Tact(th_prot) the ampliﬁer switches off.

Table 7.

Static characteristics

VP = ±35 V; fosc = 345 kHz; Tamb = 25 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supply

supply voltage

[1]

±12.5 ±35

±40

VP(ovp)

overvoltage protection supply voltage

non-operating; VDD − VSS

VP(uvp)

undervoltage protection supply voltage VDD − VSS

Iq(tot)

total quiescent current

Operating mode; no load; no

ﬁlter; no RC-snubber network

connected

5075mA

Istb

standby current

480

600

µA

Mode select input; pin MODE

VMODE

voltage on pin MODE

referenced to SGND

[2] 0

6.0

Standby mode

[2][3] 0

0.8

Mute mode

[2][3] 2.2

3.0

Operating mode

[2][3] 4.2

6.0

input current

VI = 5.5 V

110

150

µA

Audio inputs; pins IN1M, IN1P, IN2P and IN2M

input voltage

DC input

[2] -0

-V

Ampliﬁer outputs; pins OUT1 and OUT2

VO(offset)

output offset voltage

SE; mute

±15

SE; operating

[4] --

±150

BTL; mute

±21

BTL; operating

[4] --

±210

Stabilizer output; pin STABI

VO(STABI)

output voltage on pin STABI

mute and operating; with

respect to VSSP1

9.3

9.8

10.3

Temperature protection

Tact(th_prot)

thermal protection activation

temperature

154

°C

Tact(th_fold)

thermal foldback activation

temperature

closed loop SE voltage gain

reduced with 6 dB

[5] -

153

°C

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