UCSR3652SG-S08-R [UTC]

CMOS IC;
UCSR3652SG-S08-R
型号: UCSR3652SG-S08-R
厂家: Unisonic Technologies    Unisonic Technologies
描述:

CMOS IC

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UNISONIC TECHNOLOGIES CO., LTD  
UCSR3652S  
CMOS IC  
HIGH PRECISION CC/CV  
PRIMARY-SIDE PWM POWER  
SWITCH  
DIP-7A  
SOP-8  
DESCRIPTION  
The UTC UCSR3652S is a primary control 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 UCSR3652S 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 UCSR3652S 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.  
FEATURES  
* High voltage startup circuit  
* Built-in leading edge blanking  
* Built-in primary winding inductance  
compensation  
* Built-in 650V Power MOSFET  
* ±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  
* Power on soft start  
* Gate Output Maximum Voltage Clamped at 15V  
* Cycle-by-cycle current limiting  
* Over voltage protection  
* VDD under-voltage lockout  
* Frequency hopping to reduce system EMI  
ORDERING INFORMATION  
Ordering Number  
Lead Free  
Package  
Packing  
Halogen Free  
UCSR3652SL-D07A-T  
-
UCSR3652SG-D07A-T  
UCSR3652SG-S08-R  
DIP-7A  
SOP-8  
Tube  
Tape Reel  
UCSR3652SL-D07A-T  
(1) T: Tube, R: Tape Reel  
(1)Packing Type  
(2)Package Type  
(3)Green Package  
(2) D07A: DIP-7A, S08: SOP-8  
(3) L: Lead Free, G: Halogen Free and Lead Free  
www.unisonic.com.tw  
Copyright © 2016 Unisonic Technologies Co., Ltd  
1 of 10  
QW-R129-017.C  
UCSR3652S  
CMOS IC  
MARKING  
DIP-7A  
SOP-8  
PIN CONFIGURATION  
PIN DESCRIPTION  
PIN NO.  
PIN NAME  
DESCRIPTION  
DIP-7A  
SOP-8  
1
2
1
2
VDD  
COMP  
INV  
Power supply  
Loop compensation  
3
3
The voltage feedback from the auxiliary winding  
Current sense input  
4
4
CS  
5, 6  
7
5, 6  
7, 8  
DRAIN  
GND  
Power MOSFET Drain Pin  
Ground  
UNISONIC TECHNOLOGIES CO., LTD  
2 of 10  
QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
BLOCK DIAGRAM  
UNISONIC TECHNOLOGIES CO., LTD  
3 of 10  
QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
ABSOLUTE MAXIMUM RATING  
PARAMETER  
SYMBOL  
BVDSS  
IDD  
RATINGS  
-0.3 ~ Bvdss  
10  
UNIT  
V
Drain Voltage (Off State)  
VDD Zener Clamp Continuous Current  
COMP Voltage  
mA  
V
VCOMP  
VCS  
-0.3 ~ 7  
CS Input Voltage  
-0.3 ~ 7  
V
INV Input Voltage  
VINV  
-0.3 ~ 7  
V
Operating Junction Temperature  
Storage Temperature  
TJ  
-20 ~ 150  
-55 ~ 150  
°C  
°C  
TSTG  
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 CHARACTERISTICS  
PARAMETER  
DIP-7A  
SYMBOL  
RATINGS  
UNIT  
°C/W  
°C/W  
75  
90  
Junction to Ambient  
θJA  
SOP-8  
OUTPUT POWER TABLE  
PARAMETER  
RATINGS  
UNIT  
W
230VAC±15%  
85-264VAC  
14  
12  
Adapter (Note 1)  
W
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R129-017.C  
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UCSR3652S  
CMOS IC  
ELECTRICAL CHARACTERISTICS (TA=25°C, VDD=15V, unless otherwise specified)  
PARAMETER  
SYMBOL  
TEST CONDITIONS  
MIN TYP MAX UNIT  
STARTUP SECTION  
Startup Voltage  
VST  
IST  
VDD<VTH(ON)  
VDD<VTH(ON)  
25  
V
Startup Current  
700  
μA  
SUPPLY SECTION  
Turn-on Threshold Voltage  
Turn-off Threshold Voltage  
VDD OVP Protection  
VTH(ON)  
VTH(OFF)  
VDD_OVP  
IDD-OP  
13.5 14.5 16  
V
V
8.2  
55  
9
10.5  
2
28  
1.6  
1.3  
V
Operating Current  
mA  
mA  
Green-Mode Operating Current  
OSCILLATOR SECTION  
Maximum Frequency  
IDD-GREEN  
fOSC  
fOSC-CM-MIN  
fOSC-N-MIN  
f/freq  
tFHR  
65  
17  
75  
kHz  
kHz  
Hz  
Minimum Frequency at CCM  
Minimum Frequency at No-load  
Frequency Hopping Range  
Frequency Hopping Period  
INV SECTION  
300  
±5.0  
3
%
ms  
Reference Voltage for EA  
Reference Voltage for CCM  
Max. Cable Compensation Current  
CURRENT SENSE SECTION  
Current Sense Threshold Voltage  
OCP Propagation Delay  
Leading Edge Blank Time  
Soft Start Time  
VVR  
1.97 2.00 2.03  
V
V
VVR_CCM  
ICABLE_MAX  
0.5  
37  
μA  
VCS  
tD_OC  
tLEB  
tSS  
870 900 930  
mV  
nS  
90 200  
900  
nS  
10  
mS  
POWER MOSFET SECTION  
MOSFET DS Breakdown Voltage  
On Resistance  
BVDSS  
650  
2.4  
V
RDS(ON)  
OTP SECTION  
Threshold Temperature of OTP (Note 2)  
TOTP  
+140  
°C  
Notes: 1. Maximum practical continuous power in an Adapter design with sufficient drain pattern as a heat sink, at  
50°C ambient.  
2. When the over-temperature protection is activated, the power system enters auto restart mode and output  
is disabled.  
UNISONIC TECHNOLOGIES CO., LTD  
5 of 10  
QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
OPERATION DESCRIPTION  
The UTC UCSR3652S is a primary control switch mode charger and adapter applications. It operates in  
primary-side sensing and regulation. Opto-coupler and TL431 could be eliminated. Proprietary built-in CV and CC  
control can achieve high precision CV/CC performance. The device integrates PWM controller to enhance the  
performance of discontinuous conduction mode (DCM) flyback converters.  
Startup control  
The VDD pin of UTC UCSR3652S is connected to the line input through a resistor. A large value startup resistor  
can be used to minimize the power loss in application because the start current of UTC UCSR3652S is very low.  
When the VDD voltage reaches VTH(ON), the internal startup circuit is disabled and the IC turns on.  
Operating Current  
The Operating current of UTC UCSR3652S is as low as 1.6mA. Good efficiency and very low standby power can  
be achieved.  
Constant Voltage Operation  
The output voltage is defined by the transmission ratio between the secondary and auxiliary winding. The UTC  
UCSR3652S captures the auxiliary winding feedback voltage at INV pin and operates in constant-voltage (CV) mode  
to regulate the output voltage. The auxiliary voltage reflects the output voltage is given by:  
NA  
VAUX  
=
×VO + V)  
(1)  
NS  
Where V indicates the drop voltage of the output diode.  
Figure 2. Auxiliary voltage waveform  
Via a resistor divider connected between the auxiliary winding and INV, the VAUX is sampled at the Tsampling end  
and it is hold until the next sampling. The sampled voltage is compared with 2.0V reference voltage and the error is  
amplified. The error amplifier output reflects the load condition and controls the TOFF time and the Ipk to regulate the  
output voltage, thus constant output voltage can be achieved.  
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
OPERATION DESCRIPTION (Cont.)  
Constant Current Operation  
When the sampled voltage is below 2.0V reference voltage and the error amplifier output reaches its maximum,  
thus UTC UCSR3652S operates in constant-current (CC) mode. The CC point and maximum output power can be  
externally adjusted by external current sense resistor Rcs. The larger Rcs, the smaller CC point is, and the smaller  
output power becomes.  
Large  
Rcs  
VOUT  
Small  
Rcs  
IOUT  
Figure 3. Adjustable output power by changing RCS  
Figure 4. Secondary current waveform  
In CC operation, the CC loop control function of UTC UCSR3652S 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)  
(3)  
Thus the output current is given by:  
IOUT   
N
N
1
2
Tdemag  
Tsw  
1
4
P
P
IPK   
IPK  
N
N
S
S
Programmable Cable Drop Compensation  
UTC UCSR3652S has a built-in cable voltage drop compensation to achieve good load regulation. An offset  
voltage is generated at INV pin by an internal current flowing into the resistor divider. The current is inversely  
proportional to the voltage of COMP 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 INV pin. It can also be programmed by  
adjusting the resistance of the divider to compensate the drop for various cable lines used.  
UNISONIC TECHNOLOGIES CO., LTD  
7 of 10  
QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
OPERATION DESCRIPTION (Cont.)  
Current Sensing and Leading Edge Blanking  
Cycle-by-cycle current limiting is offered in UTC UCSR3652S. 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 900ns leading-edge  
blanking is built in to avoid false-termination of the switching pulse so that the external RC filtering is no longer  
needed.  
Protection Control  
Good power supply system reliability is achieved with its comprehensive protection features including VDD  
over-voltage protection, VDD Clamp, GATE Clamp, Power on soft start, Cycle-by-cycle current limiting, short circuit  
protection, leading edge blanking, OTP and UVLO, etc.  
VDD is supplied by transformer auxiliary winding output. The output of UTC UCSR3652S is shutdown when VDD  
drops below VTH(OFF) and the power converter enters power on start-up sequence thereafter.  
UNISONIC TECHNOLOGIES CO., LTD  
8 of 10  
QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
TYPICAL APPLICATION CIRCUIT (5V, 2.4A)  
BOM  
Reference  
Component  
BD 2A/650V  
Reference  
R1  
Component  
BD1  
L1  
R 2.4K1206 ±5%  
R 200K1206 ±5%  
R 18K0805 ±1%  
R 3.3K0805 ±1%  
R 11206 ±5%  
R 1K1206 ±5%  
EE-22  
1m H 6x8mm  
R4  
C1  
EC 10μF 400V 105°C  
EC 22μF 400V 105°C  
EC 4.7μF 50V 105°C  
CC 1nF 1000V 1206  
CC 0.1μF 50V 0805  
EC 2200μF 10V 105°C  
Diode UTC 1N4007G  
Diode UTC MGBR10S40  
R5  
C2  
R6  
C3  
R7  
C4  
R8  
C5  
T1  
C6  
F1  
FUSE 1A 250VAC  
Y/C 1000p F 250V  
D1,D2  
D3  
CY1  
UNISONIC TECHNOLOGIES CO., LTD  
9 of 10  
QW-R129-017.C  
www.unisonic.com.tw  
UCSR3652S  
CMOS IC  
TYPICAL CHARACTERISTICS  
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  
10 of 10  
QW-R129-017.C  
www.unisonic.com.tw  

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