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UC1103 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 UC1103
기능 HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR
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UC1103 데이터시트, 핀배열, 회로
UNISONIC TECHNOLOGIES CO., LTD
UC1103
Preliminary
HIGH PRECISION CC/CV
PRIMARY SIDE SWITCHING
REGULATOR
CMOS IC
DESCRIPTION
The UTC UC1103 is a primary control unit for switch mode
charger and adapter applications. The controlled variable is
transferred by an auxiliary winding from the secondary to the
primary side. The device integrates PWM controller to enhance the
performance of discontinuous conduction mode (DCM) flyback
converters.
The UTC UC1103 operates in primary-side sensing and
regulation. Opto-coupler and TL431 could be eliminated. It also
provides off-time modulation to linearly decrease PWM frequency
under light-load conditions so that low standby power can be
achieved.
The UTC UC1103 achieves high precision CV/CC regulation
and high power efficiency. It offers comprehensive protection
coverage with auto-recovery features including Cycle-by-cycle
current limiting, VDD over voltage protection, VDD clamp, OTP,
leading edge blanking, VDD under voltage lockout, etc.
SOP-8
FEATURES
* High voltage startup
* ±5% constant voltage regulation at universal AC input
* High precision constant current regulation at universal AC input
* Primary side control without TL431 and opto-coupler
* Programmable CV and CC regulation
* Programmable cable compensation in CV mode
* Flyback topology in DCM operation
* Frequency hopping to reduce system EMI
ORDERING INFORMATION
* Driver MOSFET switch
* Built-in leading edge blanking
* Built-in primary winding inductance
compensation
* Gate output maximum voltage clamped at 15V
* Cycle-by-cycle current limiting
* Over voltage protection
* VDD under-voltage lockout
Ordering Number
UC1103G-S08-R
Package
SOP-8
Packing
Tape Reel
UC1103G-S08-R
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) S08: SOP-8
(3) G: Halogen Free and Lead Free
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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UC1103 pdf, 반도체, 판매, 대치품
UC1103
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
HV Pin Input Voltage
Supply Voltage
VHV 500 V
VDD 30 V
Voltage at VS, CS, COMR to GND
-0.3~7.0
V
Power Dissipation (TA<50°C)
PD 660 mW
Operating Ambient Temperature
Operating Junction Temperature
TA
-40~+105
°C
TJ
-40~+150
°C
Storage Temperature Range
TSTG
-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.
THERMAL RESISTANCES CHARACTERISTICS
PARAMETER
Junction to Ambient
Junction to Case
SYMBOL
θJA
θJC
RATINGS
150
39
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS (VDD=15V, TA=25°C, unless otherwise specified)
PARAMETER
SUPPLY SECTION
Turn-on Threshold Voltage
Turn-off Threshold Voltage
VDD OVP Protection
Operating Current
Green-Mode Operating Current
HV START-UP SECTION
Minimum Startup Voltage on HV Pin
Supply Current Drawn from Pin HV
Leakage Current after Startup
OSCILLATOR SECTION
Maximum Frequency
Minimum Frequency at CCM
Minimum Frequency at No-load
Frequency Hopping Range
Frequency Hopping Period
Frequency Variation vs. VDD Deviation
VOLTAGE SENSE SECTION
Reference Voltage for EA
Reference Voltage for CCM
Max. Cable Compensation Current
CURRENT SSENSE SECTION
Current Sense Threshold Voltage
OCP Propagation Delay
Leading Edge Blank Time
Soft Start Time
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
VTH(ON)
VTH(OFF)
VDD_OVP
IDD-OP
IDD-GREEN
15 16 17 V
8 9 10 V
28 V
1.6 2 mA
1.5 mA
VHV-MIN
IHV
IHV-LC
VDC=100V
HV=500V, VDD=VDD-OFF+1V
50 V
0.6 mA
0.5 μA
fOSC
fOSC-CM-MIN
fOSC-N-MIN
f/freq
tFHR
fDV
VDD=10~25V
47 50 53 kHz
13 kHz
300 Hz
±1.5 ±2.0 ±2.5 kHz
3 ms
1 2%
VVR
VVR_CCM
ICABLE_MAX
2.475 2.525 2.625
0.5
25
V
V
uA
VCS
tD_OC
tLEB
tSS
800 mV
90 200 nS
600 nS
10 mS
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UC1103 전자부품, 판매, 대치품
UC1103
Preliminary
OPERATION DESCRIPTION(Cont.)
CMOS IC
Figure3. Adjustable output power by changing Rcs
Figure4. Secondary current waveform
In CC operation, the CC loop control function of UTC UC1103 will keep a fixed proportion between secondary
inductance de-magnetization time (Tdemag) and switching cycle time (Tsw). The fixed proportion is
Tdemag
Tsw
=
1
2
(2)
Thus the output current is given by:
Iout
=
1
2
×
NP
NS
×Ipk ×
Tdemag
Tsw
=
1
4
×
NP
NS
×Ipk
(3)
Programmable Cable Drop Compensation
UTC UC1103 has a built-in cable voltage drop compensation to achieve good load regulation. An offset voltage is
generated at VS pin by an internal current flowing into the resistor divider. The current is inversely proportional to the
voltage of COMR pin. As a result, it is inversely proportional to the output load current. The voltage drop across the
cable is compensated by this offset voltage at VS pin. It can also be programmed by adjusting the resistance of the
divider to compensate the drop for various cable lines used.
Current Sensing and Leading Edge Blanking
Cycle-by-cycle current limiting is offered in UTC UC1103. The switch current is detected by a sense resistor into
the CS pin. When the power switch is turned on, a turn-on spike will occur on this resistor. A 500ns leading-edge
blanking is built in to avoid false-termination of the switching pulse so that the external RC filtering is no longer
needed.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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