UNISONIC TECHNOLOGIES CO., LTD
USL3531J
Preliminary
LINEAR INTEGRATED CIRCUIT
NON-ISOLATED BUCK
OFFLINE LED DRIVER
DESCRIPTION
The UTC USL3531J is a high performance, high precision and
low cost constant current LED driver for non-isolated buck
application. The device operates in critical conduction mode and
is suitable for 85V~265V universal input offline LED lighting. It
operates in critical conduction mode, the output current does not
change with the inductance and LED output voltage.
The UTC USL3531J integrates a 500V power MOSFET. It can
achieve excellent constant current performance with very few
external components, so the system cost and size are minimized.
The UTC USL3531J offers rich protection functions to improve
the system reliability, including LED open circuit protection, LED
short circuit protection, VCC under voltage protection, CS resistor
short circuit protection and thermal regulation function.
FEATURES
* Critical conduction mode operation
* Internal 500V Power MOSFET
* Ultra low operating current
* No auxiliary winding
* ±5% LED output current accuracy
* LED short protection
* LED open protection
* VCC under voltage protection
* Current sensing resistor short protection
* Thermal regulation function
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
USL3531JL-S08-R
USL3531JG-S08-R
Package
SOP-8
SOP-8
Packing
Tape Reel
USL3531JG-S08-R
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) S08: SOP-8
(3) G: Halogen Free and Lead Free, L: Lead Free
MARKING
876 5
UTC
USL3531J
1234
Date Code
L: Lead Free
G: Halogen Free
Lot Code
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