6

TPA3221

SLASEE9 – JUNE 2017

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Copyright © 2017, Texas Instruments Incorporated

(1)

VDD can be connected to a supply voltage between 5 V and PVDD. VDD can be connected directly to PVDD, but must not exceed

PVDD voltage.

7.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

TYP

MAX

UNIT

PVDD

Power-stage supply

DC supply voltage

7

30

31.5

V

Supply voltage for internal LDO regulator

to supply GVDD and AVDD

DC supply voltage

7

31.5

V

External supply for VDD, GVDD and

AVDD. Internal LDO bypassed

DC supply voltage

4.5

5

5.5

V

AVDD

Supply voltage for analog circuits

DC supply voltage

4.5

5

5.5

GVDD

Supply voltage for gate-drive circuitry

DC supply voltage

4.5

5

5.5

V

Load impedance

Output filter inductance within

recommended value range

2.7

4

Ω

1.6

3

Output filter inductance

5

10

μH

Output filter inductance, PBTL before the

LC filter

5

10

Output filter inductance, PBTL after the

LC filter

each inductor

5

10

PWM frame rate selectable for AM

interference avoidance; 1% Resistor

tolerance

Nominal

384

400

417

kHz

AM1

422

440

458

AM2

480

500

520

PWM frame rate programming resistor

Nominal; Master mode

9.9

10

10.1

k

Ω

AM1; Master mode

29.7

30

30.3

AM2; Master mode

49.5

50

50.5

PVDD close decoupling capacitors

1.0

μF

Over-current programming resistor

Resistor tolerance = 5%

22

30

k

Ω

Over-current programming resistor

Resistor tolerance = 5%

47

64

k

Ω

Voltage on FREQ_ADJ pin for slave

mode operation

Slave Mode (Connect to AVDD)

5

V

Junction temperature

0

125

°C

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

(2)

Thermal data are obtained with 85°C heat sink temperature using thermal compound with 0.7W/mK thermal conductivity and 2mil

thickness. In this model heat sink temperature is considered to be the ambient temperature and only path for dissipation is to the

heatsink.

7.4 Thermal Information

TPA3221

UNIT

DDV 44-PINS HTSSOP

Junction-to-ambient thermal resistance

°C/W

Junction-to-case (top) thermal resistance

0.5

Junction-to-board thermal resistance

n/a

Junction-to-top characterization parameter

0.9

Junction-to-board characterization parameter

n/a

Junction-to-case (bottom) thermal resistance

n/a