UNISONIC TECHNOLOGIES CO., LTD
UCL2300
Preliminary
LINEAR INTEGRATED CIRCUIT
PSR SINGLE-STAGE APFC
OFFLINE LED DRIVER
DESCRIPTION
The UTC
UCL2300
is a high precision primary-side regulation
controller with single stage Active PFC, specially designed for
universal input offline flyback or buck-boost constant current LED
lighting. The controller with on-chip PFC circuit achieves high
power factor and low THD. Operating in critical conduction mode,
the power MOSFET switching loss is reduced and the inductor is
fully utilized.
The UTC
UCL2300
adopts proprietary primary side current
sensing scheme. It can precisely control the LED current without
secondary side sense and feedback circuits. The system size and
cost are optimized, as well as the system reliability.
The UTC
UCL2300
utilizes patented line and load voltage
compensation method to achieve excellent line and load
regulation. And the line compensation factor can also be tuned
externally for flexibility.
The UTC
UCL2300
offers rich protection functions to improve
the system reliability, including LED open circuit protection, LED
short circuit protection, V
CC
over voltage protection, V
CC
under
voltage protection, CS resistor open protection and cycle by cycle
current limit. All the protection functions are auto-recovery.
FEATURES
* Ultra-low (300μA) Operating current
* High resistance feedback resistor for improved
efficiency
* LED open and short circuit protection
* CS resistor open and short circuit protection
* Transformer saturation protection
* Cycle-by-cycle current limit
* V
CC
over-voltage and under-voltage protection
* Auto fault recovery
* Single-stage active PFC for high power factor and low THD
* Primary side control constant current operation, No
opto-coupler required
* Ultrafast LED start (<200ms @85V)
* ±3% LED current accuracy
* Excellent line and load regulation
* Critical conduction mode operation
* Source driving method
* Ultra-low (20μA) startup current
ORDERING INFORMATION
Ordering Number
UCL2300G-S08-R
Package
SOP-8
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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QW-R125-034.a
UCL2300
MARKING
Preliminary
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
CS 1
GND 2
COMP 3
LN 4
8 OUT
7
6
5
ST
V
CC
FB
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
CS
GND
COMP
LN
FB
V
CC
ST
OUT
DESCRIPTION
Current sense pin. Connect a resistor to GND to sense the power MOSFET current.
Ground.
Loop compensation node.
Line voltage sample input.
Feedback voltage input Pin.
Power supply pin.
Chip enable pin.
Pulse out pin. Connected to the ‘Source’ of external power MOSFET.
BLOCK DIAGRAM
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UCL2300
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
V
CC
Pin Input Voltage
V
CC
-0.3~22
V
Current Sense Pin Input Voltage
CS
-0.3~6
V
Compensation Pin Voltage
COMP
-0.3~6
V
Line Voltage Sample Input
LN
-0.3~6
V
Feedback Pin Input Voltage
FB
-0.3~6
V
ST Pin Maximum Supply Current
I
ST_MAX
5
mA
External Power MOSFET Drive Voltage
OUT
-0.3~18
V
Maximum Work Current of Internal Power MOSFET
I
OUT
3
A
Power Dissipation (Note 1)
P
DMAX
0.45
W
Junction to Ambient
θ
JA
145
°C/W
Junction Temperature
T
J
-40~+150
°C
Storage Temperature
T
STG
-55~+150
°C
Notes: 1. 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.
2. The maximum power dissipation decrease if temperature rise, it is decided by T
JMAX
,
θ
JA
, and environment
temperature (T
A
). The maximum power dissipation is the lower one between P
DMAX
=(T
JMAX
-T
A
)/
θ
JA
and the
number listed in the maximum table.
RECOMMENDED OPERATION CONDITIONS
SYMBOL
V
CC
RATINGS
11.5~17.5
UNIT
V
PARAMETER
Power Supply Voltage
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UCL2300
PARAMETER
Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Notes 1, 2) (Unless otherwise specified, V
CC
=14V and T
A
=25°C)
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Startup Voltage
V
ST
Startup Voltage
V
ST_ON
1mA, V
CC
=10V
16
17
18
V
V
ST
Hysteresis Voltage
V
ST_HYS
V
CC
=14V
2
V
ST Startup Current
I
ST_ON
V
CC
=10V
20
35
μA
ST Operating Current
I
ST_OP
V
CC
=14V
35
60
μA
Supply Voltage Section
V
CC
Startup Voltage
V
CC_ON
V
CC
Rising
10
11
12
V
V
CC
Undervoltage Protection Threshold
V
CC_UVLO
V
CC
Falling
5.2
5.8
6.5
V
V
CC
Hold Voltage
V
CC_HOLD
V
CC
Falling
7
7.5
8
V
V
CC
Turn Off Current
I
CC_UVLO
V
CC
Rising, V
CC
=10V
40
70
μA
V
CC
Quiescent Current
I
Q
No Switch, V
CC
=14V
320
600
μA
V
CC
Operating Current
I
CC
F
OP
=60kHz
300
μA
V
CC
Over Voltage Protection Threshold
V
CC_OVP
21
V
FB Feedback
FB Falling Edge Threshold Voltage
V
FB_FALL
FB Falling
0.4
V
FB Hysteresis Voltage
V
FB_HYS
FB Rising
0.6
V
FB Over Voltage Protection Threshold
V
FB_OVP
5.5
V
Minimum Off Time
T
OFF_MIN
4.0
μs
Maximum Off Time
T
OFF_MAX
90
μs
Current Sense Section
Leading Edge Blanking Time for Current Sense
T
LEB_CS
350
ns
Switch off Delay Time
T
DELAY
180
ns
Loop Compensation
Internal Reference Voltage
V
REF
0.294 0.300 0.306
V
COMP Low Clamp Voltage
V
COMP_LO
1.5
V
COMP Linear Operating Voltage Range
V
COMP
1.5
3.5
V
COMP Protection Threshold
V
COMP_OVP
4.5
V
Linear Voltage Sampling
LN Linear Working Range
V
LN
0
2.5
V
Driver Stage
Internal Tube Driven MOS Resistance
R
DS_ON
V
CC
=14V
1200
mΩ
Notes: 1. Production testing of the chip is performed at 25°C.
2. The maximum and minimum parameters specified are guaranteed by test, the typical value are guaranteed
by design, characterization and statistical analysis
UNISONIC TECHNOLOGIES CO., LTD
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QW-R125-034.a
UCL2300
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
ES20
750kΩ
910kΩ
750kΩ
1nF
1N4007
220nF
910kΩ
16.5V/0.6A
180kΩ
N
P
N
S
470μF
100nF
UTC
UCL2300
4 LN
ST 7
OUT 8
FB 5
AC
90~264V
4N60
4.7μF
1 CS
2 GND
0.82Ω
12kΩ
1μF
N
A
3 COMP V
CC
6
330kΩ
BAS21
180kΩ
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R125-034.a
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