AP3105VKTR-G1

A Product Line of Diodes Incorporated AP3105/V/L/R COST EFFECTIVE GREEN PWM CONTROLLER Description Pin Assignments (Top View) The AP3105/V/L/R 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. Pin 1 Mark 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. GND 1 6 GATE FB 2 5 VCC CTRL 3 4 SENSE The AP3105/V/L/R features a lot of functions such as the LeadingEdge Blanking (LEB) of the current sensing, internal slope compensation and several protection functions including cycle-bycycle 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. SOT-23-6 (K Package) 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 AP3105/V/L/R Document number: DS36927 Rev. 2 - 2 1 of 13 www.diodes.com February 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AP3105/V/L/R Typical Applications Circuit L2 + T1 R6 C6 C5 R4 C2 R13 C7 C8 -~ R5 ~ R19 C4 C3 U1 NTC R2 R14 R8 R3 VCC GATE R20 C1 CTRL AP3105/V/L/R F1 VR1 R7 R10 R9 SENSE R15 C10 C11 R11 R16 R12 AZ431 R17 C9 FB NTC GND R18 U2 ~ Pin Descriptions Pin Number Pin Name 1 GND 2 FB 3 CTRL 4 SENSE 5 VCC Supply voltage of driver and control circuits 6 GATE Gate driver output AP3105/V/L/R Document number: DS36927 Rev. 2 - 2 Function Signal ground. Current return for driver and control circuits Feedback. Directly connected to the opto-coupler Latch trigger if this pin voltage drops below a threshold or over another threshold, leave CTRL pin open if this function is not needed. Connecting a NTC thermistor to GND can achieve OTP protection Current Sense 2 of 13 www.diodes.com February 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AP3105/V/L/R Functional Block Diagram 2.5V 15.5V 8.6V VCC UVLO Internal Bias UVLO 5 32V OLP VCC_OVP FOCP VCC_OVP CTRL_H CTRL_L 28V OVP 3 CTRL 10K Auto Recovery Protection 0.6V 3.6V CTRL_L Latch-off Protection 0.5V OSC with Frequency Jitter Driver D DFF Q CLK RB 13V 6 GATE Burst 0.5V FB 100μA CTRL_H 2 1.8V FOCP OLP 1.1V 2R 250ns LEB 32ms Delay Soft Start 0.85V R GND PWM OCP 1 Line Compensation 4 AP3105/V/L/R AP3105/V/L/R Document number: DS36927 Rev. 2 - 2 3 of 13 www.diodes.com SENSE February 2014 © Diodes Incorporated A Product Line of Diodes Incorporated AP3105/V/L/R Absolute Maximum Ratings (Note 1) Symbol VCC IO VFB, VSENSE, VCTRL Parameter Rating Unit Power Supply Voltage 30 V Gate Output Current 350 mA -0.3 to 7 V Input Voltage to FB, SENSE, CTRL θJA Thermal Resistance (Junction to Ambient) 250 ºC/W PD Power Dissipation at TA