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PDF ULW2091 Data sheet ( Hoja de datos )
| Número de pieza | ULW2091 | |
| Descripción | NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER IC | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ULW2091 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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UNISONIC TECHNOLOGIES CO., LTD
ULW2091
Preliminary
LINEAR INTEGRATED CIRCUIT
NON ISOLATED BUCK
CONSTANT CURRENT LED
DRIVER IC
DESCRIPTION
ULW2091 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.
ULW2091 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.
ULW2091 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.
ULW2091 has a variety of protection features, including LED
short circuit protection, under voltage protection, over temperature
adjustment function and so on.
3
1
2
SOT-23-3
(JEDEC TO-236)
3
1
2
SOT-23
(JEDEC SC-59)
1
SOT-89
HSOP-8
1
TO-92
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
www.unisonic.com.tw
Copyright © 2016 Unisonic Technologies Co., Ltd
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ULW2091
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=25°C, Unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
Supply Voltage
VIN -0.3 ~ 550 V
VDD -0.3 ~ 8.5 V
SOT-23
SOT-23-3
300 mW
Power Dissipation
SOT-89
HSOP-8
PD
mW
mW
TO-92
625 mW
Junction Temperature
Storage Temperature
TJ
TSTG
-45 ~ +125
-55 ~ +150
°C
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATION CONDITIONS
PARAMETER
Input Voltage
Supply Voltage
Reference Load Current
Ambient Temperature
SYMBOL
VIN
VDD
ILOAD
TA
RATINGS
140 ~ 375
7~8
0 ~ 200
0 ~ +70
UNIT
V
V
mA
°C
THERMAL RESISTANCES CHARACTERISTICS
PARAMETER
Junction to Ambient
SOT-23
SOT-23-3
SOT-89
HSOP-8
TO-92
SYMBOL
θJA
RATING
416
200
UNIT
°C/W
°C/W
°C/W
°C/W
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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ULW2091
TEST CIRCUIT
VI
85V
115V
132V
180V
230V
264V
pF
---
0.552
---
---
0.496
---
Preliminary
LINEAR INTEGRATED CIRCUIT
Table 1. Efficiency and power factor test
VO (V)
61
61
60.4
117
116
116
IO (A)
0.0962
0.1031
0.102
0.1026
0.1008
0.1006
Pi (W)
6.6
7.04
6.92
12.9
12.65
12.64
η
88.91%
89.33%
89.03%
93.06%
92.43%
92.32%
VLED
VIN
180VAC
230VAC
264VAC
Line Regulation%
Table 2. Line Regulation & Load Regulation test
60V
0.1042
0.1043
0.1045
±0.15%
80V
0.104
0.1038
0.1038
±0.1%
120V
0.1042
0.1021
0.1017
±1.25%
Load Regulation%
±0.1%
±1.1%
±1.4%
Crucial waveforms
VIN=115V, fSW=33KHZ
Short circuit protection test
VIN=230V, fSW=66KHZ
Over-temperature protection test
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ULW2091.PDF ] | |
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