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WS3253 Datasheet(PDF) 5 Page - Shenzhen Winsemi Microelectronics Co., Ltd

Part # WS3253
Description  High Precision Primary-Side Off-line PWM Power Switch
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Manufacturer  WINSEMI [Shenzhen Winsemi Microelectronics Co., Ltd]
Direct Link  http://www.winsemi.com
Logo WINSEMI - Shenzhen Winsemi Microelectronics Co., Ltd

WS3253 Datasheet(HTML) 5 Page - Shenzhen Winsemi Microelectronics Co., Ltd

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Tel : +86-755-8250 6288
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WS3253 Product Description
WIN SEM I
M ICROELECTRON ICS
WIN SEM I
M ICROELECTRON ICS
WIN SEM I
M ICROELECTRON ICS
WIN SEM I
M ICROELECTRON ICS
WIN SEM I
M ICROELECTRON ICS
Electrical
Electrical
Electrical
Electrical Characteristics
Characteristics
Characteristics
Characteristics (TA=25℃,VDD=16V, RI=26Kohm, if not otherwise noted)
Supply
Supply
Supply
Supply Voltage
Voltage
Voltage
Voltage (VCC)
(VCC)
(VCC)
(VCC)
symbol
symbol
symbol
symbol
parameter
parameter
parameter
parameter
Test
Test
Test
Test condition
condition
condition
condition
Min
Min
Min
Min
Typ
Typ
Typ
Typ
Max
Max
Max
Max
Unit
Unit
Unit
Unit
I_VCC_ST
Start up current
VCC=13V
5
20
uA
I_VCC_OP
Operation Current
VCC=18V,INV=2V,CS=0V
2
3
mA
UVLO_ON
Turn on threshold Voltage
VCC falling
8.2
9.0
10.5
V
UVLO_OFF
Turn-off threshold Voltage
VCC rising
13.5
14.8
16.0
V
VCC_Clamp
VCC Zener Clamp Voltage
IVCC=10mA
28
29
31
V
OVP
Over
voltage
protection
Threshold
Ramp VCC until gate shut down
27
28.3
30
V
Error
Error
Error
Error Amplifier
Amplifier
Amplifier
Amplifier Section
Section
Section
Section
Vref_EA
Reference voltage for EA
1.935
1.975
2.015
V
Gain
DC gain of EA
60
dB
I_comp_max
Max.
Cable
compensation
current
INV=2V,COMP=0V
37.5
uA
Current
Current
Current
Current Sense
Sense
Sense
Sense Section
Section
Section
Section
TLEB
Leading edge Blanking Time
625
ns
Zsense
Input impedance
50
kΩ
TD_OC
OCP control delay
110
ns
VTH_OC
OCP threshold
0.895
0.91
0.925
V
T_ss
Soft start time
17
ms
Oscillator
Oscillator
Oscillator
Oscillator Section
Section
Section
Section
Freq_Max
IC Maximum frequency
60
67.5
75
khz
Freq_Nom
System nominal switch frequency
60
khz
Freq_startup
INV=0V,COMP=5V
14
khz
∆f/Freq
Frequency shuffling range
±6
%
MOSFET
MOSFET
MOSFET
MOSFET Section
Section
Section
Section
BVdss
MOSFET Drain-Source
breakdown voltage
600
V
Ron
Static Drain to Source on
resistance
12
Ω
Note
Note
Note
Note: 1. Freq_Max indicates IC internal maximum clock frequency. In system application, the maximum operation frequency of
70 kHz nominal occurs at maximum output power or the transition point from CV to CC.


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