Nexperia

NCR320PAS / NCR321PAS

250 mA LED driver in DFN2020D-6

006aad168

10-5

10

10-2

10-4

102

10-1

tp (s)

10-3

103

1

102

10

103

Zth(j-a)

(K/W)

1

duty cycle = 1

0.75

0.5

0.33

0.2

0.1

0.05

0.02

0.01

0

FR4 PCB; 4-layer copper; tin-plated and standard footprint

Fig. 4. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

006aad169

10-5

10

10-2

10-4

102

10-1

tp (s)

10-3

103

1

102

10

103

Zth(j-a)

(K/W)

1

duty cycle = 1

0.75

0.5

0.33

0.2

0.1

0.05

0.02

0.01

0

FR4 PCB; 4-layer copper; mounting pad for collector 1 cm2

Fig. 5. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values

NCR320PAS_NCR321PAS

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Nexperia B.V. 2020. All rights reserved

Product data sheet

Rev. 1 — 13 May 2020

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