HCPL4701 datasheet(16/16 Pages) HP

16 / 16 page

Figure 15. Series LED Driver Circuit for HCPL-4701/-4731.

TS – CASE TEMPERATURE – °C

200

400

125

75 100

150

600

800

200

100

300

500

700

PS (mW)

IS (mA)

175

Figure 16. Thermal Derating Curve,

Dependence of Safety Limiting Value

with Case Temperature per VDE 0884.

4.7 µF

VCC

0.1 µF

HCPL-47XX

ACTIVE OUTPUT

OPEN COLLECTOR

R1 =

VCC – VF – VOL

FOR VCC = 5 Vdc, IF = 40 µA

R1 = 82 k

Ω (TYPICAL)

R1 = 62 k

Ω (WORST CASE)

R2 = 8.2 k

Ω AT IOH = 100 µA

ITOTAL = 640 µA (TYPICAL)

R2 =

0.8 V

IOH MAX

ITOTAL =

TOTAL DRIVE CURRENT USED:

VCC – VF – VOL

VCC – VOL

Figure 13. Recommended Parallel LED Driver Circuit for

HCPL-4701/-4731.

Figure 14. Recommended Alternative LED Driver Circuit for

HCPL-4701/-4731 .

4.7 µF

VCC

0.1 µF

HCPL-47XX

ACTIVE OUTPUT

OPEN COLLECTOR

* USE ANY STANDARD SCHOTTKY DIODE.

R1 =

VCC – VF

FOR VCC = 5 Vdc, IF = 40 µA

R1 = 91 k

Ω (TYPICAL)

R1 = 75 k

Ω (WORST CASE)

HCPL-47XX

ACTIVE OUTPUT

* USE ANY SIGNAL DIODE.

R1 =

VOH – VF

FOR VCC = 5 Vdc, IF = 40 µA

R1 = 36 k

Ω (TYPICAL)

R1 = 30 k

Ω (WORST CASE)

www.semiconductor.agilent.com

Data subject to change.

Obsoletes 5965-6116E

5968-1086E (11/99)

HCPL4701 Datasheet(PDF) 16 Page - Agilent(Hewlett-Packard)

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