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PDF USR3651S Data sheet ( Hoja de datos )
| Número de pieza | USR3651S | |
| Descripción | HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
USR3651S
Preliminary
HIGH PRECISION CC/CV
PRIMARY-SIDE PWM POWER
SWITCH
CMOS IC
DESCRIPTION
The UTC USR3651S 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 USR3651S 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 USR3651S 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 circuit
* Built-in 600V 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
* Frequency hopping to reduce system EMI
* Built-in leading edge blanking
* Built-in primary winding inductance
compensation
* Power on soft start
* Gate Output Maximum Voltage Clamped at
15V
* Cycle-by-cycle current limiting
* Over voltage protection
* VDD under-voltage lockout
ORDERING INFORMATION
Ordering Number
USR3651SG-S08-R
Package
SOP-8
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 9
QW-R103-085.b
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USR3651S
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (TA=25°C, VDD=15V, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
STARTUP SECTION
Startup Voltage
Startup Current
SUPPLY SECTION
Turn-on Threshold Voltage
Turn-off Threshold Voltage
VDD OVP Protection
Operating Current
Green-Mode Operating Current
OSCILLATOR SECTION
Maximum Frequency
Minimum Frequency at CCM
Minimum Frequency at No-load
Frequency Hopping Range
Frequency Hopping Period
INV SECTION
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
Vst VDD<VTH(ON)
Ist VDD<VTH(ON)
VTH(ON)
VTH(OFF)
VDD_OVP
IDD-OP
IDD-GREEN
fOSC
fOSC-CM-MIN
fOSC-N-MIN
△f/freq
tFHR
VVR
VVR_CCM
ICABLE_MAX
VCS
tD_OC
tLEB
tSS
25
700
V
uA
13.5 14.5 16
8.2 9 10.5
28
1.6 2
1.3
V
V
V
mA
mA
55 65 75 kHz
17 kHz
300 Hz
±5.0 %
3 ms
1.97 2.00 2.03
0.5
37
V
V
uA
870 900 930 mV
90 200 nS
900 nS
10 mS
POWER MOSFET SECTION
MOSFET DS Breakdown Voltage
BVDSS
600 V
On Resistance
RDS(ON)
11 15 Ω
OTP SECTION
Threshold Temperature of OTP (Note)
TOTP
+140
°C
Note: When the over-temperature protection is activated, the power system enters auto restart mode and output is
disabled.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 9
QW-R103-085.b
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet USR3651S.PDF ] | |
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