TK2070 Ver la hoja de datos (PDF) - Tripath Technology Inc.

Número de pieza

componentes Descripción

Fabricante

TK2070

STEREO 70W (4Ω) CLASS-T™ DIGITAL AUDIO AMPLIFIER DRIVER USING DIGITAL POWER PROCESSING (DPP™) TECHNOLOGY

Tripath Technology Inc. 

Tripath Technology, Inc. - Technical Information

TPS1035

SYMBOL

PARAMETER

θJA

Junction-to-Ambient Thermal Resistance

θJC

Junction-to-case Thermal Resistance

Value

50

8

UNITS

°C/W

°C/W

ELECTRICAL CHARACTERISTICS – TC2001

SYMBOL

PARAMETER

I5

Supply Current

fsw

Switching Frequency (adjustable via CFB)

VIN

Input Sensitivity

VOUTHI

High Output Voltage

VOUTLO

Low Output Voltage

RIN

Input Impedance

Input DC Bias

MIN.

600

0

V5-0.5

TYP.

60

650

2

2.5

MAX.

1.5

100

UNITS

mA

kHz

V

V

mV

kΩ

V

ELECTRICAL CHARACTERISTICS – TK2070

TA = 25 °C. See Application/Test Circuit. Unless otherwise noted, the supply voltage is VCC = 24V.

SYMBOL

PARAMETER

Iq

Quiescent Current

(No load, Mute = 0V)

IMUTE

Mute Supply Current

(No load, TC2001 Mute = 5V,

TPS1035 Sleep = 5V)

VIH

High-level input voltage (MUTE)

VIL

Low-level input voltage (MUTE)

ISC

Short circuit current limit

IVPPSENSE VPPSENSE Threshold Currents

VVPPSENSE

Threshold Voltages with

RVPPSENSE = 187KΩ

(Note 4, Note 5)

CONDITIONS

VDD = 24V

V5 = 5V

VDD = 24V

V5 = 5V

IIH = See Mute Control Section

IIL = See Mute Control Section

VDD = 24V

Over-voltage turn on (muted)

Over-voltage turn off (mute off)

Under-voltage turn off (mute off)

Under-voltage turn on (muted)

Over-voltage turn on (muted)

Over-voltage turn off (mute off)

Under-voltage turn off (mute off)

Under-voltage turn on (muted)

MIN.

3.5

138

62

25.8

11.6

TYP.

20

27

4

7

7.5

162

154

79

72

30.3

28.8

14.8

13.5

MAX.

60

UNITS

mA

mA

µA

mA

V

1.0

V

A

178

µA

µA

87

µA

µA

33.3

V

V

16.3

V

V

Note 4: These supply voltages are calculated using the IVPPSENSE values shown in the Electrical Characteristics

table. The typical voltage values shown are calculated using a RVPPSENSE value of 187kohm without any

tolerance variation. The minimum and maximum voltage limits shown include either a +1% or –1% (+1% for

Over-voltage turn on and Under-voltage turn off, -1% for Over-voltage turn off and Under-voltage turn on)

variation of RVPPSENSE off the nominal value. These voltage specifications are examples to show both

typical and worst case voltage ranges for a given RVPPSENSE resistor values of 187kohm. Please refer to

the Application Information section for a more detailed description of how to calculate the over and under

voltage trip voltages for a given resistor value.

Note 5: The fact that the over-voltage turn on specifications exceed the absolute maximum of +26V for the TK2070

does not imply that the part will work at these elevated supply voltages. It also does not imply that the

TK2070 is tested or guaranteed at these supply voltages. The supply voltages are simply a calculation based

on the process spread of the IVPPSENSE currents (see note 7). The supply voltage must be maintained

below the absolute maximum of +26V or permanent damage to the TK2070 may occur.

3

TK2070 – MC/2.1/10-03

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