AP3103 Datasheet, PDF (1/14 Pages) BCD Semiconductor Manufacturing Limited – VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER

Preliminary Datasheet
VERSATILE COST EFFECTIVE GREEN PWM CONTROLLER
General Description
Features
AP3103
The AP3103 is a low startup current, current mode _{· Bi-CMOS Process with Excellent Performance}
PWM controller with green-mode power-saving opera- _{· Very Low Start-up Current:(< 15µA)}
tion. The PWM switching frequency at normal opera-
tion is externally programmable and is trimmed to a
tigh range. The dithering of frequency will improve
·
·
Current Mode Control
Non-audible-noise Green-mode Control
EMI feature. When the load decreases, the frequency ^{· LEB (Leading-edge Blanking) on CS Pin}
will reduce and when at a very low load, the IC will ^{· Internal Slope Compensation}
enter the ‘skip mode’ to minimize switching loss. ^{· Frequency Fold Back for High Average Effi-}
About 20kHZ frequency switching is aviode the audi-
ciency
ble noise as well as reduding the standby loss.
· Soft Switching for Reducing EMI
· Useful Pin Fault Protection:
The AP3103 features a lot of functions such as the
CS Pin Floating
Leading-Edge Blanking (LEB) of the current sensing,
RI Pin Short to Ground
internal slope compensation and several protection
RI Pin Floating
functions including cycle-by-cycle current limit
FB/Opt-coupler Open/short
(OCP), VCC Over Voltage Protection (VOVP), OTP, _{· Comprehensive System Protection Feature:}
OLP protection.
VCC Over Voltage Protection (VOVP)
Over Temperature Protection (OTP)
Over Load Protection (OLP)
This IC is available in SOT-23-6 and DIP-8 packages. _{· Mini Size with Packages}
Applications
· Switching AC-DC Adapter/Charger
· ATX/BTX Auxiliary Power
· Set-top Box(STB) Power Supply
· Open Frame Switching Power Supply
Feb. 2010 Rev. 1. 0
SOT-23-6
DIP-8
Figure 1. Package Types of AP3103
BCD Semiconductor Manufacturing Limited
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