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PDF OB2353 Datasheet ( Hoja de datos )

Número de pieza OB2353
Descripción Low Power Off Line SMPS Switcher
Fabricantes On-Bright Electronics 
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OB2353 datasheet

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OB2353 pdf
OB2353
Low Power Off Line SMPS Switcher Freq Shuffling
ELECTRICAL CHARACTERISTICS
(TA = 25OC if not otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage (VDD)
I_VDD_Startup VDD Start up
VDD =14.5V,Measure
5 20 uA
Current
Leakage current into VDD
I_VDD_Operation Operation Current VDD=16V, VFB=3V
1.6 mA
UVLO(ON)
VDD Under
8.7 9.7 10.7 V
Voltage Lockout
Enter
UVLO(OFF)
VDD Under
14.9 15.9 16.9 V
Voltage Lockout
Exit (Recovery)
OVP(ON)
Over voltage
VDD=16V,CS=0V,FB=3V 28.5 30 31.5 V
protection
Ramp up VDD until gate
voltage
clock is off
VDD_Clamp
VDD Zener Clamp IDD = 10 mA
Voltage
31 32 33 V
Feedback Input Section(FB Pin)
VFB_Open
VFB Open Loop
Voltage
IFB_Short
FB pin short
circuit current
VTH_0D
Zero Duty Cycle
FB Threshold
Voltage
VTH_PL
Power Limiting
FB Threshold
Voltage
Short FB pin to GND and
measure current
VDD=16V
5.4 5.7 6.0 V
1.45 mA
0.8 V
3.7 V
TD_PL
Power limiting
Debounce Time
50 mSec
www.DaZtaFSBh_eIeNt4U.com
Input Impedance
4 Kohm
Current Sense Input(Sense Pin)
Soft start time
4 ms
T_blanking
Leading edge
270 ns
blanking time
ZSENSE_IN
TD_OC
Input Impedance
Over Current
Detection and
From Over Current Occurs
till the Gatedrive output start
40
120
Kohm
nSec
Control Delay
to turn off
VTH_OC
Internal Current
Limiting
FB=3.3V
VDD=16V
0.72 0.77 0.82 V
Threshold Voltage
Oscillator
FOSC
f_Temp
f_VDD
Normal Oscillation
Frequency
Frequency
Temperature
Stability
Frequency Voltage
Stability
VDD = 16V
VDD = 16V
VDD = 16-20V
45 50 55 KHZ
5%
5%
©On-Bright Electronics
-5-
Confidential
OB_DOC_DS_5301

5 Page

OB2353 arduino
OB2353
Low Power Off Line SMPS Switcher Freq Shuffling
PACKAGE MECHANICAL DATA
8-Pin Plastic SOP
www.DataSheet4U.com
©On-Bright Electronics
- 10 -
Confidential
OB_DOC_DS_5301

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