Test results with the STA333IS and 2- or 4-layer PCB

AN4233

8/12

Doc ID 024143 Rev 1

3.3

STA333IS: 500 mA output current and 4-layer PCB

Figure 4.

STA333IS: 500 mA output current and 4-layer PCB - thermal measurement

Table 6.

STA333IS: 1000 mA output current and 2-layer PCB - summary table

Total power [W]

1.0903

W

Temperature (case) [°C]

72.3

°C

Temperature (ambient) [°C]

24

°C

44.300

°C/W

Table 7.

STA333IS: 500 mA output current and 4-layer PCB - current measurement

[m

Ω]

[mV]

I_Channel

[A]

[mV]

[mW]

RDS

[m

Ω]

Vcc

[V]

I_Vcc

[mA]

Vdd

[V]

I_Vdd

[mA]

Out 1A

100

51.1

0.511

65.15

33.29165

127.49511

8.36

19.21

3.3

32

Out 1B

100

50.46

0.5046

69.55

35.09493

137.83195

Out 2A

100

50.94

0.5094

69.9

35.60706

137.22026

Out 2B

100

51.1

0.511

64.8

33.1128

126.81018

Table 8.

STA333IS: 500 mA output current and 4-layer PCB - power dissipation

Power_Output [W]

0.13711

W

Power_Vdd [W]

0.1056

W

Power_Vcc [W]

0.1606

W