AP3105LKTR-G1

Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R General Description Features 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 þburst modeÿ to minimize switching loss. g g g g g g g 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. g g g g g 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-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. g g g This IC is available in SOT-23-6 package. 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 Applications g g g g Switching AC-DC Adapter/Charger ATX/BTX Auxiliary Power Set-top Box(STB) Power Supply Open Frame Switching Power Supply SOT-23-6 Figure 1. Package Type of AP3105/V/L/R Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Pin Configuration K Package (SOT-23-6) Pin 1 Mark GND 1 6 GATE FB 2 5 VCC CTRL 3 4 SENSE Figure 2. Pin Configuration of AP3105/V/L/R (Top View) Pin Description Pin Number Pin Name Function 1 GND 2 FB 3 CTRL 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 4 SENSE Current Sense 5 VCC Supply voltage of driver and control circuits 6 GATE Gate driver output Signal ground. Current return for driver and control circuits Feedback. Directly connected to the opto-coupler Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Functional Block Diagram 2.5V 15.5V 8.6V VCC UVLO Internal Bias UVLO 5 28V OVP 3 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 CTRL 10K Auto Recovery Protection OLP VCC_OVP FOCP VCC_OVP CTRL_H CTRL_L 32V 100uA CTRL_H 2 1.8V FOCP OLP 1.1V 250ns LEB 32mS Delay 2R Soft Start 0.85V R GND PWM OCP 1 Line Compensation 4 SENSE AP3105/V/L/R Figure 3. Functional Block Diagram of AP3105/V/L/R Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Ordering Information AP3105 - Circuit Type G1: Green Product Version* Blank: AP3105 V: AP3105V L: AP3105L R: AP3105R TR: Tape and Reel Package Package K: SOT-23-6 Part Number SOT-23-6 Marking ID Packing Type AP3105KTR-G1 GHN Tape & Reel AP3105VKTR-G1 GHO Tape & Reel AP3105LKTR-G1 GHP Tape & Reel AP3105RKTR-G1 GHQ Tape & Reel BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green. * Product Version Classification (with Different Protection Functions) Product Version Frequency VOVP OLP& SOCP CTRL (Low) CTRL (High) AP3105 65kHz Auto-Recoverable Auto-Recoverable Latch Auto-Recoverable AP3105V 65kHz Latch Auto-Recoverable Latch Latch AP3105L 65kHz Latch Latch Latch Latch AP3105R 65kHz Auto-Recoverable Auto-Recoverable Auto-Recoverable Latch Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit VCC 30 V IO 350 mA VFB, VSENSE,VCTRL -0.3 to 7 V Thermal Resistance (Junction to Ambient) TJA 250 Power Dissipation at TA