FAN5340MPX Ver la hoja de datos (PDF) - Fairchild Semiconductor

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FAN5340MPX

Synchronous Constant-Current Series Boost LED Driver with PWM Brightness Control and Integrated Load Disconnect

Fairchild Semiconductor 

Block Diagrams

VIN

CIN

PGND

EN

GND

L1

Q1

GATE

DRIVE

BOOST

CONTROL

SW

Q2

D1

VOUT

Q3

VLED

COUT

2–4

LEDs

Figure 2. Block Diagram

FB

RSET 15 -

133Ω

Table 1. Recommended External Components

Component

Description

Vendor

Parameter Min. Typ. Max.

Units

L1

22μH Nominal

Murata

L(1)

LQH3NPN220MGOK DCR (Series R)

22

1100

μH

mΩ

COUT

4.7μF X5R or Better

C

4.7

μF

CIN

4.7μF X5R or Better

C

4.7

μF

Note:

1. Minimum L (inductance) incorporates tolerance, temperature, and DC bias effects (L decreases with increasing current).

© 2010 Fairchild Semiconductor Corporation

FAN5340 • Rev. 1.0.1

2

www.fairchildsemi.com

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