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OB2202 Datasheet Preview

OB2202 Datasheet

Quasi-Resonant Flyback PWM Controller

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OB2202
Quasi-Resonant Flyback PWM Controller
GENERAL DESCRIPTION
OB2202 is a highly integrated Quasi-Resonant (QR)
controller optimized for high performance offline
flyback converter applications.
At normal load condition, it operates in QR mode
with minimum drain voltage switching. To meet the
CISPR-22 EMI starting at 150KHz, the maximum
switching frequency is internally limited to 130KHz.
It operates in PFM mode for high power conversion
efficiency at light load condition. When the loading is
very small, the IC operates in ‘Extended Burst Mode’
to minimize the switching loss. As a result, lower
standby power consumption and higher conversion
efficiency can be achieved.
OB2202 offers comprehensive protection coverage
including Cycle-by-Cycle Current Limiting, VCC
Under Voltage Lockout(UVLO), Programmable
Output Over Voltage Protection(OVP), VCC Clamp,
Gate Clamp, Over Load Protection(OLP), On-chip
Thermal Shutdown, Programmable Soft Start,
Programmable Brownout Protection, Programmable
Over Power Protection (OPP) Compensation, and
External Latch Triggering, Max On-time Limit, etc.
OB2202 is offered in SOP-8 and DIP-8 packages.
FEATURES
Multi-Mode Operation
Quasi-Resonant Operation at Normal Loading
Pulse Frequency Modulation (PFM) Operation at
Light Load
Programmable Brownout Protection and Line
OVP Protection
Burst Mode at No Load
Excellent OPP Compensation
20KHz Minimum Frequency Limit at QR Mode
130KHz Maximum Frequency Limit
Internal Minimum T_off for Ringing Suppression
35us Maximum On Time Limit
50us Maximum Off Time Limit
Internal Leading Edge Blanking
Programmable Soft-start
Cycle-by-cycle Current Limiting
External Latch Triggering
Internal Thermal Shutdown
1A Peak Current Sink/Source Capability
Programmable Output OVP
APPLICATIONS
Offline AC/DC flyback converter for
Power Adaptor and Open-frame SMPS
LCD Monitor/TV/PC/Set-Top Box Power
Supplies
NB/DVD/Portable DVD Power Supplies
TYPICAL APPLICATION
©On-Bright Electronics
-1-
Confidential
OB_DOC_DS_0200




On-Bright Electronics

OB2202 Datasheet Preview

OB2202 Datasheet

Quasi-Resonant Flyback PWM Controller

No Preview Available !

OB2202
Quasi-Resonant Flyback PWM Controller
GENERAL INFORMATION
Pin Configuration
The pin map of OB2202 in DIP8 and SOP8 package
is shown as below.
Ordering Information
Part Number
OB2202AP
OB2202CP
OB2202CPA
Description
8 Pin DIP, Pb free in Tube
8 Pin SOP, Pb free in Tube
8 Pin SOP, Pb free in T&R
Note: All Devices are offered in Pb-free Package if not otherwise
noted.
Package Dissipation Rating
Package
DIP8
SOP8
RθJA (°C/W)
90
150
Absolute Maximum Ratings
Parameter
VCC Zener Clamp Voltage
VCC Clamp Continuous
Current
SS Input Voltage
FB Input Voltage
CS Input Voltage
DEM Input Voltage
BO Input Voltage
Min/Max Operating Junction
Temperature TJ
Min/Max Storage Temperature
Tstg
Lead Temperature (Soldering,
10secs)
Value
31 V
10 mA
-0.3 to 7V
-0.3 to 7V
-0.3 to 7V
-0.3 to 7V
-0.3 to 7V
-20 to 150 oC
-55 to 150 oC
260 oC
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.
©On-Bright Electronics
-2-
Confidential
OB_DOC_DS_0200


Part Number OB2202
Description Quasi-Resonant Flyback PWM Controller
Maker On-Bright Electronics
Total Page 14 Pages
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