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USL3531J Datasheet Preview

USL3531J Datasheet

NON-ISOLATED BUCK OFFLINE LED DRIVER

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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
www.unisonic.com.tw
Copyright © 2020 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-165.b




UTC

USL3531J Datasheet Preview

USL3531J Datasheet

NON-ISOLATED BUCK OFFLINE LED DRIVER

No Preview Available !

USL3531J
PIN CONFIGURATION
Preliminary
LINEAR INTEGRATED CIRCUIT
GND 1
ROVP 2
NC 3
VCC 4
8 CS
7 CS
6 DRAIN
5 DRAIN
PIN DESCRIPTION
PIN NO.
1
2
3
4
5, 6
7, 8
PIN NAME
GND
ROVP
NC
VCC
DRAIN
CS
DESCRIPTION
Ground
Over voltage protection setting pn. Connect a resistor to GND
No connection. Should be connected to GND(Pin1)
Power supply pin
Internal HV Power MOSFET Drain.
Current sense pin. Connect a sense resistor between this pin and GND pin.
BLOCK DIAGRAM
DRAIN
VCC
17V 14V
9.0V
ROVP
GND
+
-
-
OVP
UVLO
RESET
HV
VCC MOSFET
OCP OTP
CC & Logic
Control
OFF time
control
LEB
+
Current
Sense
- 400mV
CS
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R103-165.b


Part Number USL3531J
Description NON-ISOLATED BUCK OFFLINE LED DRIVER
Maker UTC
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USL3531J Datasheet PDF






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