ZLED7002 Datasheet

© 2016 Integrated Device Technology, Inc.

8

April 20, 2016

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−

−

=

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4

R

V

V

V

I

1

FD

LED

FSUB

CC

SUB

The SUB LED channel current (ISUB) is calculated via equation (3):

(3)

Where

VFSUB-LED = The forward voltage of the SUB LED

VFD1 = The forward voltage of Zener diode D1, which should be as small as possible

2.5.

ZLED7002 Protection Features

2.5.1.

Over-Temperature Protection

The ZLED7002 includes protection from damage due to over-temperature conditions. The ZLED7002 automatically turns off if its

temperature

is ≥160°C (typical). If the temperature returns to ≤140°C, the ZLED7002 turns on and continues normal operation.

2.5.2.

Main LED Short-Circuit Protection

The ZLED7002 will detect a short-circuit on the MAIN LED. In this case, the ZLED7002 automatically turns off the MAIN LED

channel and activates the SUB LED channel.