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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 
Logotipo On-Bright Electronics Logotipo
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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
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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
IMPORTANT NOTICE
RIGHT TO MAKE CHANGES
On-Bright Electronics Corp. reserves the right to make corrections, modifications, enhancements,
improvements, and other changes to its products and services at any time and to discontinue any product or
service without notice. Customers should obtain the latest relevant information before placing orders and should
verify that such information is current and complete.
WARRANTY INFORMATION
On-Bright Electronics Corp. warrants performance of its hardware products to the specifications applicable at
the time of sale in accordance with its standard warranty. Testing and other quality control techniques are used
to the extent it deems necessary to support this warranty. Except where mandated by government requirements,
testing of all parameters of each product is not necessarily performed.
On-Bright Electronics Corp. assumes no liability for applications assistance or customer product design.
Customers are responsible for their products and applications using On-Bright’s components, data sheet and
application notes. To minimize the risks associated with customer products and applications, customers should
provide adequate design and operating safeguards.
LIFE SUPPORT
On-Bright Electronics Corp.’s products are not designed to be used as components in devices intended to
support or sustain human life. On-bright Electronics Corp. will not be held liable for any damages or claims
resulting from the use of its products in medical applications.
MILITARY
On-Bright Electronics Corp.’s products are not designed for use in military applications. On-Bright Electronics
Corp. will not be held liable for any damages or claims resulting from the use of its products in military
applications.
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©On-Bright Electronics
- 11 -
Confidential
OB_DOC_DS_5301

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