E522.32 Datasheet, PDF (1/2 Pages) ELMOS Semiconductor AG – SWITCH-MODE SONSTANT CURRENT LED CONTROLLER FAMILY

SWITCH-MODE CONSTANT CURRENT LED CONTROLLER FAMILY
PRELIMINARY INFORMATION - MAR 6, 2013
E522.32/34
Features
General Description
ÿ Switch-mode, single or dual LED controller
ÿ 5.0V to 55V input voltage range, up to 80V
boosted output voltage
ÿ Boost-, Boost-to-battery-, Buck-to-battery- or SEPIC-
topology
ÿ Constant current regulation implemented
ÿ Differential high-side sense up to 60V
ÿ High-frequency PWM dimming capability
ÿ 10:1 Analog dimming capability for LED binning
ÿ Digital dimming up to 5000:1 at 100Hz PWM
ÿ Integrated softstart
ÿ Advanced In-System Diagnostic (e.g. GND loss,
output-overload and highside-feedback
diagnostics)
ÿ Very low sleep mode currents of typ. 8μA
ÿ Integrated automotive LDOs for 5V & 3.3V
ÿ AEC-Q100 Qualified
ÿ Junction temperature range -40°C to +150°C
Applications
ÿ Automotive LED lighting applications
ÿ General indoor and outdoor lighting and signals
ÿ TFT backlighting
ÿ General current driven applications
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
Product ID
E522.32
E522.34
Oscillator spectrum
spread
narrow
Package
QFN32L5
QFN32L5
Typical Application Circuit
VSM
VSM
AGND
VIN
VIN
ON
OSCIN
µC
PWDIM1
DIM1
µC
PWDIM2
LGATE1
DIM2
LGATE2
E522.32
ERRB2
FBL1
FBH1
OVPIN1
OVPO
OVPIN2
FBH2
FBL2
µC
FBL1
FBH1
OVP1
OVP2
FBH2
FBL2
VSM
FBL1 FBH1
OVP1
DIM1
VIN
“ Boost to Battery Circuit ”
OVP2 FBH2
FBL2 DIM2
VIN
“ Boost to GND Circuit ”
This document contains information on a pre-production product. Elmos Semiconductor AG reserves the right to change specifications and information herein without notice.
Elmos Semiconductor AG
Info Sheet
QM-No.: 25IS0078E.03