SW

BOOT

DIM

GND

VIN

VCC

RON

CS

THERMAL/POWER VIA

GND

VIN

L1

D1

LED+

LED-

LM3402, LM3402HV

SNVS450F – SEPTEMBER 2006 – REVISED OCTOBER 2015

www.ti.com

Layout Guidelines (continued)

10.1.4 Remote LED Arrays

In some applications the LED or LED array can be far away (several inches or more) from the LM3402/HV, or on

a separate PCB connected by a wiring harness. When an output capacitor is used and the LED array is large or

separated from the rest of the converter, the output capacitor should be placed close to the LEDs to reduce the

effects of parasitic inductance on the AC impedance of the capacitor. The current sense resistor should remain

on the same PCB, close to the LM3402/HV.

10.2 Layout Example

Figure 32. Layout Recommendation

30

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