UL82AG-AB3-R [UTC]
NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER IC;
| 型号： | UL82AG-AB3-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | NON ISOLATED BUCK CONSTANT CURRENT LED DRIVER IC 驱动 |
| 文件： | 总12页 (文件大小：400K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
NON ISOLATED BUCK
CONSTANT CURRENT LED
DRIVER IC
3
3
1
1
2
2
SOT-23-3
SOT-23
(JEDEC TO-236)
(JEDEC SC-59)
DESCRIPTION
UL82A 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.
UL82A 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.
1
HSOP-8
SOT-89
1
UL82A 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.
TO-92
UL82A 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
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
UL82AG-AB3-R
UL82AG-AE2-R
UL82AG-AE3-R
UL82AG-SH2-R
UL82AG-T92-B
UL82AG-T92-K
-
SOT-89
SOT-23-3
SOT-23
HSOP-8
TO-92
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Box
Bulk
-
-
-
UL82AL-T92-B
UL82AL-T92-K
TO-92
MARKING
SOT-23-3 / SOT-23
SOT-89
Date Code
UL82A
1 2 3
HSOP-8
TO-92
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
CS
3
2
1
1
2
3
VDD
CS
DRAIN
VDD
DRAIN
SOT-23 / SOT-23-3
SOT-89
1
2
3
4
VDD
NC
CS
CS
CS
CS
8
7
6
5
3
2
1
DRAIN
CS
CS
NC
VDD
DRAIN
TO-92
HSOP-8
PIN DESCRIPTION
PIN NO.
PIN NAME
DESCRIPTION
Power Supply
SOT-23
SOT-23-3
SOT-89
HSOP-8
TO-92
1
2
3
-
2
1
3
-
1
4
1
3
2
-
VDD
DRAIN
CS
The Internal High-Voltage Drain
5, 6, 7, 8
2, 3
Float Ground and Current Sampling Pin
NC
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=25°C, Unless otherwise specified)
PARAMETER
SYMBOL
VIN
RATINGS
-0.3 ~ 550
-0.3 ~ 8.5
UNIT
V
Input Voltage
SupplyVoltage
VDD
V
SOT-23
SOT-23-3
SOT-89
HSOP-8
TO-92
300
mW
Power Dissipation
PD
695
1250
mW
mW
mW
°C
625
Junction Temperature
Storage Temperature
TJ
TSTG
-45 ~ +125
-55 ~ +150
°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
SYMBOL
VIN
RATINGS
140 ~ 375
7 ~ 8
UNIT
V
Input Voltage
Supply Voltage
VDD
V
Reference Load Current
Ambient Temperature
ILOAD
TA
0 ~ 200
0 ~ +70
mA
°C
THERMAL RESISTANCES CHARACTERISTICS
PARAMETER
SYMBOL
RATING
416
UNIT
°C/W
SOT-23
SOT-23-3
SOT-89
HSOP-8
TO-92
Junction to Ambient
θJA
180
100
200
°C/W
°C/W
°C/W
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (TA=25°C, Unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
POWER SUPPLY SECTION
Input Voltage
VIN
VDD
VDD_ON
IST
85
7
220
7.3
6.2
1
265
7.8
6.5
2
V
V
Chip Operating Voltage
Chip Starting Voltage
Chip Starting Current
Chip Operating Current
Power Efficiency
DRAIN=100V
VDD rise
6
V
VDD=6.2V
0.5
120
0.88
0.4
mA
uA
ICC
180
300
η
ILED=100mA
ILED=100mA
Power Factor
PF
0.5
±5
0.7
0.3
CC SECTION
The Precision of Constant Current
Standby Power Consumption
PROTECTION SECTION
Short Circuit Protection
Frequency
CC
FST
ILED=0mA~200mA
%
W
VIN=220AC
RCS=3Ω
2
3
4
KHz
Current Detection Threshold
Edge Blanking Time
VCS_TH
TLEB
580
600
500
200
620
mV
ns
Turn Off Delay Time
TOFF_DELAY
ns
TIME CONTROL SECTION
Minimum Turn Off Time
Maximum Turn off Time
Maximum Turn-on Time
POWER MOS SECTION
LDMOS Withstand Voltage
Conduction Resistance
TEMPER SECTION
TOFF_MIN
TOFF_MAX
TON_MAX
2.5
300
40
us
us
us
BV
500
550
30
600
V
RON
IDS=0.1A
Ω
Over Temper Adjust
140
160
20
°C
°C
°C
Over Temper Protect
Over Temper Hysteresis
Notes: 1. The parameters are not 100% tested in production.
2. The minimum, maximum range of standard specification by the test to ensure, typical values by design,
test or analysis to ensure.
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT (Cont.)
R1
C1
LED
L0
D1
D2
D5
U1
AC
CIN
DRAIN
3
2
1
CS
D3
D4
VDD
C2
R2
TO-92
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT (Cont.)
BOM
Reference
R1
Component
750K, 1206
3Ω, 1206
R2
C1
2.2nF / 1KV, 1206
2.2nF / 50V, 0805
6.8μF, 400V
1N4007
C2
CIN
D1 ~ D4
D5
ES1J, SMA
4.7mH
L0
U1
UL82A
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
UL82A is a constant current driver IC for LED lighting, which is applied to the non isolated LED driver power
supply.
The 500V power switch is integrated in the chip, which is based on the constant current architecture and control
method, and it can achieve excellent constant current characteristics with minimal external components.
And without auxiliary winding power supply and testing, the system cost is very low.
Start
After the system is powered up, the input voltage is charged on the VDD pin through the jfet, and when the VDD
voltage reaches the threshold value, the chip's internal reference circuit begins to work. When the chip is working
normally, the required operating current is still through the supply of internal consumption.
Constant current control
The chip is detected the peak current, and the RCS resistance is connected to the input terminal of the peak
comparator, which is compared with the threshold voltage 0.6V. When the RCS voltage reaches the threshold, the
LED current is adjusted, and realized the constant current control.
The formula for calculating the inductor peak current is IPK=600/RCS (mA).
Among them, RCS is a current sampling resistor.
The output of the comparator CS also includes a 500ns leading edge blanking time.
The formula for calculating the LED average current is ILED=IPK/2.
Among them, IPK is the inductor peak current.
Protection function
UL82A built in a variety of protection functions, including LED short-circuit protection, LED open circuit protection,
sampling circuit short-circuit protection, temperature regulation and protection, etc.
When LED short circuit, the system works in the 3 KHz low frequency, so the power consumption is very low.
Over temperature adjustment function
UL82A has the function of over temperature adjustment, the output current is gradually reduced when the driving
power is over, so that the output power and temperature rise is controlled, the power supply is maintained at the set
value,
In order to improve the reliability of the system, the chip is internally set to adjust the temperature of the 140°C.
PCB design
In the design of PCB, you need to follow the following guidelines:
VDD bypass capacitor is required to close the VDD pin of the chip.
RCS resistor requires close to the CS pin of the chip
Between RCS and VDD bypass capacitor resistor connected to the copper foil as short as possible
CS pin increases in the area of copper clad to improve chip cooling.
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
Table 1. Efficiency and power factor test
VI
pF
---
VO (V)
IO (A)
0.0962
0.1031
0.102
Pi (W)
6.6
η
85V
61
61
88.91%
89.33%
89.03%
93.06%
92.43%
92.32%
115V
132V
180V
230V
264V
0.552
---
7.04
6.92
12.9
12.65
12.64
60.4
117
116
116
---
0.1026
0.1008
0.1006
0.496
---
Table 2. Line Regulation & Load Regulation test
VLED
60V
80V
120V
Load Regulation%
VIN
180VAC
230VAC
264VAC
0.1042
0.1043
0.1045
±0.15%
0.104
0.1038
0.1038
±0.1%
0.1042
0.1021
0.1017
±1.25%
±0.1%
±1.1%
±1.4%
Line Regulation%
Crucial waveforms
VIN=115V, fSW=33KHZ
VIN=230V, fSW=66KHZ
Over-temperature protection test
Short circuit protection test
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UL82A
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
750K
2.2nF
ES1J
L
6.8μF
4.7mH
N
U1
3
2
1
DRAIN
CS
VDD
2.2nF
3Ω
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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