E522.32/34

Elmos Semiconductor AG

Info Sheet

QM-No.: 25IS0078E.03

This document contains information on a pre-production product. Elmos Semiconductor AG reserves the right to change specifications and information herein without notice.

SWITCH-MODE CONSTANT CURRENT LED CONTROLLER FAMILY

PRELIMINARY INFORMATION - MAR 6, 2013

Features

Applications

boosted output voltage

topology

output-overload and highside-feedback

diagnostics)

General Description

E522.32 and E522.34 are parts of a family of fixed fre-

quency switch-mode high voltage LED power supplies

and controllers with high efficiency. Integrated high-

side sensing allows topologies related to GND (Boost-

to-GND or SEPIC) as well as related to input voltage

(Boost-to-battery or Buck-to-battery, particularly in

harsh automotive environments.

The switching frequency is adjustable up to 600kHz by

an external resistor or can be synchronized in Master-

Slave configurations with other devices. The phase shift

of 180° between channels essentially reduces EMI. De-

vices are available as 2-channel with spread spectrum

oscillators (E522.32) and as 2- channel without spread

spectrum (E522.34) versions to optimize size and ef-

fort of the application. Multiple control- and monitor-

ing functions, e.g. short- and open load detection, over-

temperature shutdown and undervoltage lockout are

implemented.

Ordering Information

FBL1

FBH1

“ Boost to Battery Circuit ”

“ Boost to GND Circuit ”

OVP1

OVP2

VSM

FBL2

FBL2

DIM2

VIN

VIN

FBH2

DIM1

VSM

FBH2

OVPIN2

OVPO

OVPIN1

FBH1

FBL1

ERRB2

µC

FBL1

FBH1

OVP1

OVP2

FBH2

FBL2

µC

µC

DIM1

VSM

LGATE2

LGATE1

PWDIM2

PWDIM1

OSCIN

ON

VIN

VIN

AGND

DIM2

E522.32

Product ID

Oscillator spectrum

Package

E522.32

spread

QFN32L5

E522.34

narrow

QFN32L5

Typical Application Circuit