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 burst modey 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<25oC PD 500 mW Operating Junction Temperature TJ -40 to150 oC TSTG 150 oC ESD (Human Body Model) 3000 V ESD (Machine Model) 300 V Power Supply Voltage Gate Output Current Input Voltage to FB, SENSE, CTRL Storage Temperature Range o C/W Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Supply Voltage Symbol Min Max Unit VCC 10 25 V Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Electrical Characteristics VCC=16V, TA=25oC, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit PA Supply Voltage (VCC Pin) Startup Current ISTARTUP 2 5 25 VFB=0V, CL=1nF 0.5 0.85 1.2 VFB=3V, CL=0nF 0.6 1.2 2.0 UVLO (on) 14.5 15.5 16.5 V VCC Maintain 9.7 10.2 10.7 V UVLO (off) 7.6 8.6 9.6 V 27 28.5 30 31 34 Operating Supply Current ICC VCC OVP VCC Clamp ICC=5mA mA V V PWM Section/Oscillator Section Maximum Duty Cycle 70 75 80 % Oscillation Frequency 60 65 70 kHz Green Mode Frequency 20 30 kHz Frequency Temperature Stability -20oC to 125oC (Note 2) 5 % Frequency Voltage Stability VCC=12V to 30V 3 % r4 r6 r8 % 0.800 0.850 0.900 V FOCP Voltage 1.65 1.8 1.95 V LEB Time of SENSE 150 250 350 ns Frequency Dithering Current Sense Section (SENSE Pin) Maximum SENSE Voltage VCS VFB=3.6V Delay to Output (Note 2) 100 Soft-start Time ns 3 5 8 ms 2.5 3 3.5 V/V Feedback Input Section (FB Pin) The Ratio of Input Voltage to Current Sense Voltage Input Impedance Source Current VFB=0V 7 10 13 k: -0.75 -0.5 -0.25 mA Green Mode Threshold 2 Input Voltage for Zero Duty 1.3 Nov. 2012 Rev. 1. 2 1.55 V 1.8 V BCD Semiconductor Manufacturing Limited 6 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Electrical Characteristics VCC=16V, TA=25oC, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit 1 V Output Section (GATE Pin) Output Low Level IO=20mA, VCC=12V Output High Level IO=20mA, VCC=12V Output Clamping 8 11 V 13 15 V Rising Time (Note 2) CL=1nF, VCC=13V 150 250 ns Falling Time (Note 2) CL=1nF, VCC=13V 50 100 ns 100 110 PA Protection Section (CTRL Pin) Source Current 90 Internal Reference Voltage 1.5 V Low Threshold Trigger for Latch 0.47 0.5 0.53 V High Threshold Trigger for Latch 2.35 2.5 2.65 V 2 mA 40 ms Pull-up Current (Note 3) Delay Time Section Delay of Short Circuit Protection Delay of Hiccup Protection 22 VCC OVP 32 25 Ps Note 2. Guaranteed by design. Note 3. The sourcing current of CTRL pin must be limited below 5mA.Otherwise it may cause permanent damage to the device. Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Typical Performance Characteristics 10.0 18.0 17.5 9.5 Shutdown Voltage (V) Startup Voltage (V) 17.0 16.5 16.0 15.5 15.0 14.5 14.0 9.0 8.5 8.0 7.5 13.5 13.0 -40 -20 0 20 40 60 80 100 120 7.0 -40 140 -20 0 20 40 60 80 100 120 140 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 5. Shutdown Voltage vs. Ambient Temperature Figure 4. Startup Voltage vs. Ambient Temperature 3.0 8.0 7.5 2.5 6.5 Operating Current (mA) Startup Current (PA) 7.0 6.0 5.5 5.0 4.5 4.0 3.5 2.0 1.5 1.0 0.5 3.0 2.5 2.0 -40 -20 0 20 40 60 80 100 120 0.0 -40 140 -20 0 20 40 60 80 100 120 140 o o Ambient Temperature ( C) Ambient Temperature ( C) Figure 7. Operating Current vs. Ambient Temperature Figure 6. Startup Current vs. Ambient Temperature Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R CTRL Utilization for Latch VCC VCC VCC Option Option Option NTC NTC NTC CTRL CTRL CTRL OVP and OTP OVP Nov. 2012 Rev. 1. 2 OTP BCD Semiconductor Manufacturing Limited 9 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER Operation Description The AP3105/V/L/R is specifically designed for off-line AC-DC power supply used in LCD monitor, notebook adapter and battery charger applications. It offers a cost effective solution with a versatile protection function. Start-up Current and UVLO The start-up current of AP3105/V/L/R is optimized to realize ultra low current (5PA typical) so that VCC capacitor can be charged more quickly. The direct benefit of low start-up current is the availability of using large start-up resistor, which minimizes the resistor power loss for high voltage AC input. An UVLO comparator is included in AP3105/V/L/R to detect the voltage on VCC pin. It ensures that AP3105/ V/L/R can draw adequate energy from hold-up capacitor during power-on. The turn-on threshold is 15.5V and the turn-off threshold is 8.6V. Current Sense Comparator and PWM Latch The AP3105/V/L/R operates as a current mode controller, the output switch conduction is initiated by every oscillator cycle and is terminated when the peak inductor current reaches the threshold level established by the FB pin. The inductor current signal is converted to a voltage signal by inserting a reference sense resistor RS. The inductor current under normal operating conditions is controlled by the voltage at FB pin. The relation between peak inductor current (IPK) and VFB is: I PK (VFB 0.8) / 3RS Moreover, FOCP with 1.8V threshold is only about 100ns delay, which can avoid some catastrophic damages such as secondary rectifier short test. Few drive cycles can alleviate the destruction range and get better protection. Leadingedge Blanking A narrow spike on the leading edge of the current waveform can usually be observed when the power MOSFET is turned on. A 250ns leading-edge blank is built-in to prevent the false-triggering caused by the turn-on spike. During this period, the current limit Nov. 2012 Rev. 1. 2 AP3105/V/L/R comparator is disabled and the gate driver can not be switched off. At the time of turning on the MOSFET, a negative undershoot (maybe larger than -0.3V) can occur on the SENSE pin. So it is strongly recommended to add a small RC filter or at least connect a resistor R on this pin to protect the IC (Shown as Figure 8). 5 VCC 3 CTRL GATE 6 AP3105 1 GND Necessary R SENSE 4 FB 2 C Large undershoot (more than -0.3V) may damage the SENSE pin Figure 8 Built-in Slope Compensation It is well known that a continuous current mode SMPS may become unstable when the duty cycle exceeds 50%. The built-in slope compensation can improve the stability, so there is no need for design engineer to spend much time on that. FB Pin and Short Circuit Protection This pin is normally connected to the opto-coupler and always paralleled with a capacitor for loop compensation. When the voltage at this pin is greater than 4.2V and lasts for about 32ms, the IC will enter the protection mode. For AP3105/V/R, the system will enter hiccup mode to wait the VCC decreasing to low UVLO level, then the IC will try to restart until the failure removed. And when this voltage is less than 1.55V, the IC will stop the drive pulse immediately. Therefore, this feature can be used for short circuit protection, which makes the system immune from damage. Normally, output short makes the VFB value to the maximum because the opto-coupler is cut off. VCC Maintain Mode During light load or step load , VFB will drop and be BCD Semiconductor Manufacturing Limited 10 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER Operation Description (Continued) The AP3105/V/L/R provides versatile system and pin fault protections. The OCP comparator realizes the cycle-by-cycle current limiting (OCP). In universal input line voltage, the IC realizes the constant over load protection (OLP). VCC over voltage protection can be applied as the primary OVP or opto-coupler broken protection. The AP3105/V/L/R also has pin fault connection protection including floating and short connection. The floating pin protection include the SENSE, FB, etc.. The short pin protection includes the CTRL pin short protection. When these pins are floated or CTRL pin is shorted to ground, PWM switching will be disabled, thus protecting the power system. lower than 1.55V, thus the PWM drive signal will be stopped, and there is no more new energy transfered due to no switching. Therefore, the IC supply voltage may reduce to the shutdown threshold voltage and system may enter the unexpected restart mode. To avoid this, the AP3105/V/L/R hold a so-called VCC maintain mode which can supply energy to VCC. When VCC decreases to a setting threshold, the VCC maintain comparator will output some drive signal to make the system switch and provide a proper energy to VCC pin. The VCC maintain function will cooperate the PWM and burst mode loop which can make the output voltage variation be within the regulation. This mode is very useful for reducing startup resistor loss and achieve a better standby performance with a low value VCC capacitor. The VCC is not easy to touch the shutdown threshold during the startup process and step load. This will also simplify the system design. The normal VCC voltage is suggested to be designed a little higher than VCC maintain threshold thus can achieve the best balance between the standby and step load performance. System Protection Protection and Pin AP3105/V/L/R Latch Protection Function For some applications, the system requires the latch protection function. The CTRL pin has two kinds of modes to trigger the latch protection: high level trigger and low level trigger. The low threshold is 0.5V and high threshold voltage is 2.5V. Some version will have only one mode. Once the latch protection is triggered, the IC will disable the output signal, and the bulk capacitor provides the energy to IC through the startup resistor to ensure the IC disable the output (latch mode). This mode will be not released until the AC input is shut off. So, the de-latch time is mainly depending on the HV startup bulk capacitor value. Therefore, if the system want a short de-latch time, it is better for the startup resistor take power from the point before the rectifier bridge as illustrated in below figure. Fault AC Mains (90V to 265V) CBUS 5 3 2 VCC CTRL GATE AP3105V/L/R FB SENSE 6 4 GND 1 Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 11 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Typical Application L2 T1 R6 C6 C5 R4 C2 R13 C7 C8 a R5 a 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 a Figure 9. Typical Application of AP3105/V/L/R Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 12 Data Sheet COST EFFECTIVE GREEN PWM CONTROLLER AP3105/V/L/R Mechanical Dimensions SOT-23-6 Unit: mm(inch) 0e 2.820(0.111) 8e 3.020(0.119) 0.300(0.012) 0.400(0.016) 5 4 2 3 0.300(0.012) 0.600(0.024) 1.500(0.059) 1.700(0.067) 2.650(0.104) 2.950(0.116) 6 0.200(0.008) Pin 1 Mark 1 0.700(0.028)REF 0.950(0.037)TYP 0.000(0.000) 0.150(0.006) 1.800(0.071) 2.000(0.079) 0.100(0.004) 0.200(0.008) 0.900(0.035) 1.450(0.057) MAX 1.300(0.051) Nov. 2012 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 13 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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