AP3105NVKTR-G1 Diodes Incorporated

A Product Line of Diodes Incorporated AP3105NA/NV/NL/NR COST EFFECTIVE GREEN PWM CONTROLLER Description Pin Assignments The AP3105NA/NV/NL/NR is a low startup current, current mode K Package PWM controller with green-mode power-saving operation. The PWM (SOT-23-6) 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 Pin 1 Mark 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 GND GATE 1 6 as reducing the standby loss. The skip mode point can be adjusted through the external resistor connected to the current sense resistor. FB The AP3105NA/NV/NL/NR features a lot of functions such as the VCC 5 2 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 SENSE 34 CTRL 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 Very Low Start-up Current Switching AC-DC Adapter/Charger Current Mode Control ATX/BTX Auxiliary Power Non-audible-noise Green-mode Control Set-top Box(STB) Power Supply Skip Mode Adjustable Open Frame Switching Power Supply 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 September 2013 AP3105NA/NV/NL/NR Diodes Incorporated www.diodes.com Document number: DS36542 Rev. 1 - 2 A Product Line of Diodes Incorporated AP3105NA/NV/NL/NR Typical Applications Circuit L2 T1 C6 R6 C5 R4 C2 R13 C8 C7 R5 R19 C4 R14 C3 U1 NTC R8 R2 R3 VCC GATE R10 C1 R9 R15 SENSE C10 CTRL R16 C11 R11 R12 AP3105NA/ R17 R7 VR1 NV/NL/NR AZ431 C9 FB NTC R18 GND 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 September 2013 AP3105NA/NV/NL/NR Diodes Incorporated www.diodes.com Document number: DS36542 Rev. 1 - 2 F1 + ~ ~ ~ -