AP2273
AC-DC PWM CONTROLLER
AiT Semiconductor Inc.
www.ait-ic.com
CURRENT MODE PWM POWER SWITCH
DESCRIPTION
FEATURES
AP2273 combines a dedicated current mode PWM
controller. It is optimized for high performance, low
standby power, and cost effective off- line flyback
converter applications in 40W~60W range.
AP2273 offers complete protection coverage with
automatic self-recovery feature including Cycle-
by-Cycle current limiting (OCP),SENSE short
protection, SENSE floating protection, over load
protection (OLP), and VDD under voltage lockout
(UVLO), over temperature protection (OTP), over
voltage(fixed or adjustable) protection (OVP).
The tone energy at below 20kHz is minimized in
the design and audio noise is eliminated during
operation.
Power on Soft Start Reducing 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 Switching Frequency
Internal Synchronized Slope Compensation
Leading Edge Blanking on Current Sense Input
Good Protection Coverage With Auto Self
Recovery
VDD Under Voltage Lockout with
Hysteresis(UVLO)
Over Temperature Protection (OTP) with
auto-recovery
The AP2273 is available in SOT-26 package.
Cycle-by-cycle over current threshold setting for
constant output power limiting over universal
input voltage range
Overload Protection (OLP) with auto- recovery
Over voltage Protection(OVP) with
auto-recovery
ORDERING INFORMATION
Package Type
SOT-26
Part Number
AP2273E6R
AP2273E6VR
Adjustable OVP through external Zener
Available in SOT-26 Package
E6
APPLICATION
V: Halogen free Package
R: Tape & Reel
Note
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
AiT provides all RoHS products
Suffix “ V “ means Halogen free Package
TYPICAL APPLICATION
REV1.0
- JUN 2016 RELEASED -
- 1 -