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UL98A Datasheet Preview

UL98A Datasheet

NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER

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UNISONIC TECHNOLOGIES CO., LTD
UL98A
Preliminary
NON ISOLATED BUCK
CONSTANT CURRENT LED
DRIVER IC
CMOS IC
DESCRIPTION
UL98A is a high precision LED BUCK constant current driver
chip. The chip operates in the inductor current critical continuous
mode, which is suitable for the non isolated buck LED constant
current power supply with 85Vac~265Vac full range input voltage.
UL98A chip integrated 500V power switch by patent
demagnetization detection technology and high voltage power
supply technology, without detection and power supply for auxiliary
winding, the peripheral devices are more simple, saving the cost
and volume of the system.
UL98A chip with high precision current sampling circuit, while
the use of patented constant current control technology to achieve
high accuracy of the LED constant current output and excellent line
voltage regulator. The chip operates in the critical mode of inductor
current and the output current is not changed with the increase of
the inductance and the working voltage of LED.
UL98A has a variety of protection features, including LED short
circuit protection, under voltage protection, over temperature
adjustment function and so on.
FEATURES
* The integrated 500V power mos.
* The integrated high voltage power supply function.
* The inductor current critical continuous mode.
* Without auxiliary winding detection and power supply.
* The wide voltage input voltage.
* ±5% LED output current accuracy.
* The LED short circuit and open circuit protection.
* The chip power supply under voltage protection.
* The regulating function of overheating
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UL98AL-AE3-R
UL98AG-AE3-R
Package
SOT-23
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2017 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-150.a




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UL98A Datasheet Preview

UL98A Datasheet

NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER

No Preview Available !

UL98A
MARKING
Preliminary
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTION
PIN NO.
1
2
3
PIN NAME
DRAIN
VDD
CS
DESCRIPTION
The Internal High-Voltage Drain
Power Supply
Float Ground and Current Sampling Pin
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R103-150.a


Part Number UL98A
Description NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER
Maker UTC
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