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WS2273 Datasheet(PDF) 4 Page - Shenzhen Winsemi Microelectronics Co., Ltd

Part # WS2273
Description  2273 Current Mode PWM Controller
PDF  9 Pages
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Manufacturer  WINSEMI [Shenzhen Winsemi Microelectronics Co., Ltd]
Direct Link  http://www.winsemi.com
Logo WINSEMI - Shenzhen Winsemi Microelectronics Co., Ltd

WS2273 Datasheet(HTML) 4 Page - Shenzhen Winsemi Microelectronics Co., Ltd

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WS2273
WS2273
WS2273
WS2273
4/9
Steady,
Steady,
Steady,
Steady, keep
keep
keep
keep you
you
you
you advance
advance
advance
advance
Electrical
Electrical
Electrical
Electrical Characteristics
Characteristics
Characteristics
Characteristics (TA=25℃，VCC=16V, 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
VCC_OP
Operation voltage
30
V
UVLO_ON
Turn on threshold Voltage
6
7
8
V
UVLO_OFF
Turn-off threshold Voltage
12.5
13.5
14.5
V
I_VCC_ST
Start up current
VCC=13V
5
20
uA
I_VCC_OP
Operation Current
VFB=3V
1.8
2.5
mA
Vpull_up
Pull-up PMOS active
13
VCC_Clamp
VCC Zener Clamp Voltage
IVCC=10mA
30
32
34
V
OVP(ON)
Over voltage protection voltage
CS=0.3V,FB=3V, Ramp up
VCC until gate clock is off
26
28
30
Vlatch_release
Latch release voltage
5
Feedback
Feedback
Feedback
Feedback Input
Input
Input
Input Section
Section
Section
Section
VFB_Open
VFB Open Loop Voltage
3.9
4.2
V
Avcs
PWM input gain ΔVfb/ΔVcs
2
V/V
Vref_green
The threshold enter green mode
2.1
V
Vref_burst_H
The threshold exit burst mode
1.3
V
Vref_burst_L
The threshold enter burst mode
1.2
V
IFB_Short
FB Pin Short Current
FB Shorted to GND
0.4
mA
VTH_PL
Power limiting FB Threshold
3.7
V
TD_PL
Power limiting Debounce
80
88
96
ms
ZFB_IN
Input Impedance
16
kΩ
Max_Duty
Maximum duty cycle
75
80
85
%
Current
Current
Current
Current CS
CS
CS
CS Section
Section
Section
Section
SST
Soft Start time
4
ms
TLEB
Leading edge Blanking Time
220
ns
ZCS
Input impedance
40
kΩ
TD_OC
OCP control delay
GATE with 1nF to GND
120
ns
VTH_OC
OCP threshold
FB＝3V
0.75
V
Vocp_clamping
0.9
V
Oscillator
Oscillator
Oscillator
Oscillator Section
Section
Section
Section
Fosc
Normal Oscillation Frequency
VCC=14V,FB=3V,CS=0.3V
60
65
70
khz
Fosc_BM
Burst mode frequency
22
khz
∆f_temp
Frequency
variation
versus
temp. Deviation
TEMP = -20 to 85℃
1
%
∆f_VCC
Frequency variation versus VCC
VCC = 12 to 25V
1
%
F_shuffling
Shuffling Frequency
32
Hz
∆f_OSC
Frequency Jittering
±4
%



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