Circuit Protection for HBLED String

The preferred method of driving LEDs is to have them in strings of LEDs in series, so that currents in the strings are matched for equal brightness.

Features

High ON-state current capability

Low off-state leakage

Ability to auto-reset to off-state if LED heals

Low and repeatable response time

Key Requirement

Low ON-state resistance, high OFF-state resistance and high reliability

Benefits

High reliability, enables longevity of string and ﬁxture

Capable of operating in high current strings

Key Specifications - NUD4700 LED Shunt

Parameter	Symbol	Typ Value	Package
Off-state leakage (VAnode = 5 V)	ILEAK	100 µA	Powermite-2
Breakover Voltage (IBR = 1 mA)	VBR	7.5 V
Holding Current (VAnode = 10 V, Iinitial = 100 mA)	IH	6.0 mA
Latching Current (VAnode = 10 V)	IL	35 mA
On-State Voltage (IT = 350 mA)	VT	1.0 V
On-State Voltage (IT = 750 mA)	VT	1.0 V
On-State Voltage (IT = 1000 mA)	VT	1.0 V