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On-Bright Electronics

OB233F Datasheet Preview

OB233F Datasheet

High Performance Current Mode PWM Power Switch

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OB233F
High Performance Current Mode PWM Power Switch
GENERAL DESCRIPTION
OB233F combines a dedicated current mode
PWM controller with a high voltage power
MOSFET. It is optimized for high performance, low
standby power, and cost effective off-line flyback
converter applications.
OB233F offers complete protection coverage with
automatic recovery feature including Cycle-by-
Cycle current limiting (OCP), over load protection
(OLP), over temperature protection (OTP), over
voltage protection and VDD under voltage lockout
(UVLO). Excellent EMI performance is achieved
with On-Bright proprietary frequency shuffling
technique together with soft switching control at
the totem pole gate drive output.
The tone energy at below 20KHZ is minimized in
the design and audio noise is eliminated during
operation.
OB233F is offered in DIP7 package.
APPLICATIONS
Offline AC/DC flyback converter for
AC/DC adapter
PDA power supplies
Digital cameras and camcorder adapter
VCR, SVR, STB, DVD&DVCD Player SMPS
Set-top box power
Auxiliary power supply for PC and Server
Open-frame SMPS
TYPICAL APPLICATION
FEATURES
Standby power lower than 100mW at
universal AC input
Power on soft start reducing Power MOSFET
Vds stress
Frequency shuffling for EMI
Extended burst mode control for improved
efficiency and minimum standby power design
Audio noise free operation
Fixed 65KHZ (typical) switching frequency
Internal synchronized slope compensation
Low VDD startup current and low operating
current
Leading edge blanking on current sense input
Comprehensive protection coverage
o VDD under voltage lockout with hysteresis
(UVLO)
o Over temperature protection (OTP) with
auto- recovery
o On-Bright proprietary line input
compensated
o Cycle-by-Cycle over-current threshold
setting for constant output power limiting
over universal input voltage range.
o Accurate overload protection (OLP).
o Over voltage protection(OVP)
o Secondary rectifier short protection
Output Power Table
Product
230VAC±15%
Adapter1
85-265VAC
Adapter1
OB233F
23W
18W
Notes: 1. Maximum practical continuous power in an adapter design with sufficient drain pattern as a heat sink, at 40ambient.
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_233F01




On-Bright Electronics

OB233F Datasheet Preview

OB233F Datasheet

High Performance Current Mode PWM Power Switch

No Preview Available !

OB233F
High Performance Current Mode PWM Power Switch
GENERAL INFORMATION
Pin Configuration
The OB233F is offered in DIP7 package as shown
below.
Ordering Information
Part Number Description
OB233FSP DIP7, Pb-free
Package Dissipation Rating
Package
RJA (/W)
DIP7
75
Note: Drain Pin Connected to 100mm2 PCB copper clad.
Absolute Maximum Ratings
Parameter
Value
Drain voltage (off state)
-0.3V to BVdss
VDD voltage
-0.3V to 30 V
VDD-G input voltage
-0.3V to 30 V
FB input voltage
-0.3 to 7V
Sense input voltage
-0.3 to 7V
Min/Max operating junction
temperature TJ
Min/Max storage temperature
Tstg
Lead temperature (soldering,
10secs)
-40 to 150
-55 to 150
260
Note: Stresses beyond those listed under “absolute
maximum ratings” may cause permanent damage to the device.
These are stress ratings only, functional operation of the
device at these or any other conditions beyond those indicated
under “recommended operating conditions” is not implied.
Exposure to absolute maximum-rated conditions for extended
periods may affect device reliability.
OB233F X X
Current Mode PWM Power Switch
Package
S:DIP7
Package Pb-free
P : Pb-free
©On-Bright Electronics
Confidential
-2-
Preliminary Datasheet
OB_DOC_DS_233F01


Part Number OB233F
Description High Performance Current Mode PWM Power Switch
Maker On-Bright Electronics
Total Page 10 Pages
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