AP3105KTR-G1 Diodes Incorporated

A Product Line of Diodes Incorporated AP3105/V/L/R COST EFFECTIVE GREEN PWM CONTROLLER Description Pin Assignments The AP3105/V/L/R is a low startup current, current mode PWM (Top View) controller with green-mode power-saving operation. The PWM switching frequency at normal operation is set with 65kHz typically Pin 1 Mark 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 GND GATE 1 6 loss. FB VCC 2 5 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. SENSE CTRL 3 4 The AP3105/V/L/R 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- SOT-23-6 (K Package) 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. Applications Features Switching AC-DC Adapter/Charger Very Low Start-up Current ATX/BTX Auxiliary Power Current Mode Control Set-top Box(STB) Power Supply Non-audible-noise Green-mode Control Open Frame Switching Power Supply 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 1 of 13 AP3105/V/L/R February 2014 Diodes Incorporated www.diodes.com Document number: DS36927 Rev. 2 - 2 A Product Line of Diodes Incorporated AP3105/V/L/R Typical Applications Circuit L2 T1 C6 R6 C5 C2 R4 R13 C8 C7 R5 R19 C4 C3 U1 NTC R14 R8 R2 R3 VCC GATE R20 R10 C1 R9 R15 C10 SENSE CTRL C11 R16 R11 R12 AP3105/V/L/R R17 R7 VR1 AZ431 C9 FB NTC GND R18 U2 Pin Descriptions Pin Number Pin Name Function 1 GND Signal ground. Current return for driver and control circuits 2 FB Feedback. Directly connected to the opto-coupler Latch trigger if this pin voltage drops below a threshold or over another threshold, leave CTRL pin 3 CTRL open if this function is not needed. Connecting a NTC thermistor to GND can achieve OTP protection 4 SENSE Current Sense 5 VCC Supply voltage of driver and control circuits 6 GATE Gate driver output 2 of 13 AP3105/V/L/R February 2014 Diodes Incorporated www.diodes.com Document number: DS36927 Rev. 2 - 2 F1 + ~ ~ ~ -