Nexperia

NEX81801DA; NEX81802DA

Adaptive Synchronous Rectifier (SR) Controller

aaa-040616

-40

-10

20

50

80

110

140

50

60

70

80

90

100

T (°C)

Vfwd

Vfwd

(mV)

(mV)

VCC = 7 V, HV = 20 V

Fig. 9. HV maximum charging current vs. temperature

8.7. Typical waveforms

Table 10. Typical waveforms

VGS 5 V/div

VCC 5 V/div

VDS 20 V/div

aaa-040718

VIN = 110VAC, VOUT = 20 V, IOUT = 3.25 A

High-side, HV connected to VD

Fig. 10. Operation in 65 W flyback application

VGS 5 V/div

VCC 5 V/div

VDS 20 V/div

aaa-040719

VIN = 230VAC, VOUT = 20 V, IOUT = 3.25 A

High-side, HV connected to VD

Fig. 11. Operation in 65 W flyback application

VGS 5 V/div

VCC 5 V/div

VDS 20 V/div

aaa-040720

VIN = 110VAC, VOUT = 20 V, IOUT = 0.325 A

High-side, HV connected to VD

Fig. 12. Operation in 65 W flyback application

VGS 5 V/div

VCC 5 V/div

VDS 20 V/div

aaa-040721

VIN = 230VAC, VOUT = 20 V, IOUT = 0.325 A

High-side, HV connected to VD

Fig. 13. Operation in 65 W flyback application

NEX81801_2DA

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Nexperia B.V. 2024. All rights reserved

Product data sheet

Rev. 1 — 30 September 2024

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