Diodes AP3105NA/NV/NL/NR - Manual

AP3105NA/NV/NL/NR
Document number: DS36542 Rev. 1 - 2
1 of 13
www.diodes.com
September 2013
© Diodes Incorporated
AP3105NA/NV/NL/NR
A Product Line of
Diodes Incorporated
COST EFFECTIVE GREEN PWM CONTROLLER
Description
The AP3105NA/NV/NL/NR is a low startup current, current mode
PWM controller with green-mode power-saving operation. The PWM
switching frequency at normal operation is set with 65kHz typically
and the dithering of frequency will also improve the EMI feature.
When the load decreases, the frequency will reduce and when at a
very low load, the IC will enter the ‘burst mode’ to minimize switching
loss.
About 20kHz frequency switching is to avoid the audible noise as well
as reducing the standby loss. The skip mode point can be adjusted
through the external resistor connected to the current sense resistor.
The AP3105NA/NV/NL/NR features a lot of functions such as the
Leading-Edge Blanking (LEB) of the current sensing, internal slope
compensation and several protection functions including cycle-by-
cycle current limit (OCP), VCC Over Voltage Protection (VOVP), OTP
and OLP protection. The versatile latch function can be set by the
customer through few components.
This IC is available in SOT-23-6 package.
Features
 Very Low Start-up Current
 Current Mode Control
 Non-audible-noise Green-mode Control
 Skip Mode Adjustable
 Internal Slope Compensation
 Soft Start During Startup Process
 Frequency Fold Back for High Average Efficiency
 Secondary Short Winding Protection with FOCP
 Soft Switching for Reducing EMI
 VCC Maintain Mode
 Latch Function for OTP/OVP
 Useful Pin Fault Protection:
SENSE Pin Floating
CTRL Pin Short to Ground
FB/Opto-coupler Open/Short
 Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP)
Over Load Protection (OLP)
 Mini Size with Packages
 Pin to Pin Compatible with AP3103
Pin Assignments
K Package
(SOT-23-6)
Applications

Switching AC-DC Adapter/Charger
 ATX/BTX Auxiliary Power
 Set-top Box(STB) Power Supply
 Open Frame Switching Power Supply
1
2
3 4
5
Pin 1 Mark
6 GND
FB
CTRL
GATE
VCC
SENSE