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USL250X Datasheet Preview

USL250X Datasheet

HIGH PRECISION NON-ISOLATED POWER SWITCH

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UNISONIC TECHNOLOGIES CO., LTD
USL250X
HIGH PRECISION
NON-ISOLATED POWER
SWITCH
CMOS IC
DESCRIPTION
USL250X offers comprehensive protection coverage with
auto-recovery features including LED string short circuit protection,
cycle-by-cycle current limiting, built-in leading edge blanking, VDD
under voltage lockout (UVLO), over temperature protection(OTP),
etc.
Cycle-by-Cycle current limiting is offered in USL250X. The
switch current is detected by a sense resistor into the CS pin. An
internal leading edge blanking circuit chops off the sensed voltage
spike at initial power MOSFET on state so that the external RC
filtering on sense input is no longer needed.
It is a high current precision, non-isolated power switch for LED
lighting. It works under transition mode. The LED lighting system
design by eliminating the auxiliary winding inductance and works
under low current. A 500V power switch is also integrated into the
device. The LED current can be adjusted externally by the sense
resistor Rs at CS pin and high precision constant current
regulation is realized.
DIP-8
SOP-8
FEATURES
* High precision constant current regulation at universal
AC input
* Support system application with PF>0.7 and no flicking
* Sense and supply without auxiliary winding inductance
* Low system cost and high efficiency
* Low operation current
* Programmable CC regulation
* Transition mode operation
* LED string short circuit protection
* Cycle-by-Cycle current limiting
* Built-in Leading Edge Blanking (LEB)
* VDD Under Voltage Lockout with Hysteresis
* Over temperature protection (OTP)
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
USL2500L-S08-R
USL2500G-S08-R
USL2502L-D08-T
USL2502G-D08-T
Package
SOP-8
DIP-8
Packing
Tape Reel
Tube
USL250XG-S08-R
(1)Packing Type
(2)Package Type
(3)Green Package
(4)Product Code
(1) R: Tape Reel, T: Tube
(2) S08: SOP-8, D08: DIP-8
(3) G: Halogen Free and Lead Free, L: Lead Free
(4) refer to ORDERING INFORMATION
www.unisonic.com.tw
Copyright © 2019 Unisonic Technologies Co., Ltd
1 of 8
QW-R103-155.C




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USL250X Datasheet Preview

USL250X Datasheet

HIGH PRECISION NON-ISOLATED POWER SWITCH

No Preview Available !

USL250X
MARKING
Product Code
876 5
UTC
USL250X
1 23 4
PIN CONFIGURATION
Date Code
L: Lead Free
G: Halogen Free
Lot Code
CMOS IC
CS 1
NC 2
VDD 3
NC 4
8 GND
7 GND
6 DRAIN
5 DRAIN
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
CS
NC
VDD
NC
Drain
Drain
GND
GND
DESCRIPTION
Current sensing terminal
No Connection
Power supply Input
No connection
MOSFET Drain Terminal
MOSFET Drain Terminal
Power Ground, suggest to be left floating with no pad in PCB layout.
Power Ground, suggest to be left floating with no pad in PCB layout.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 8
QW-R103-155.C


Part Number USL250X
Description HIGH PRECISION NON-ISOLATED POWER SWITCH
Maker UTC
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