TDF8599B datasheet(31/54 Pages) NXP

31 / 54 page

TDF8599B_1

Product data sheet

Rev. 01 — 29 July 2009

31 of 54

NXP Semiconductors

TDF8599B

I2C-bus controlled dual channel class-D power ampliﬁer

12.1 Switching characteristics

Table 20.

Switching characteristics

VP =VDDA = 14.4 V; −40 °C < Tamb < +85 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Internal oscillator

fosc

oscillator frequency

external clock frequency;

Rosc =39kΩ

320

kHz

internal ﬁxed frequency and Spread

spectrum mode frequency based on

the resistor value connected to pin

OSCSET for the master setting

300

450

kHz

Master/slave setting (OSCIO pin)

Rosc

oscillator resistance

resistor value on pin OSCSET;

master setting

Ω

VOL

LOW-level output voltage

output

0.8

VOH

HIGH-level output voltage

output

VIL

LOW-level input voltage

input

0.8

VIH

HIGH-level input voltage

input

ftrack

tracking frequency

PLL enabled

300

500

kHz

Nslave

number of slaves

driven by one master

Spread spectrum mode setting

∆fosc

oscillator frequency variation

between maximum and minimum

values; Spread spectrum mode

activated

-10

fsw

switching frequency

Spread spectrum mode activated;

CSSM =1 µF

-7

-Hz

Frequency hopping

fosc(int)

internal oscillator frequency

change positive; IB1[D4] = 1;

IB1[D3] = 1

-fosc +10% -

kHz

change negative; IB1[D4] = 1;

IB1[D3] = 0

-fosc − 10 % -

kHz

Timing

rise time

PWM output; Io = 0 A

fall time

PWM output; Io = 0 A

tw(min)

minimum pulse width

Io = 0 A

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