![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() NEW APPLICATION TOOL BRIEF August 2006 OPTIMIZED FOR VERY LOW STANDBY POWER HICCUP MODE LINE-SIDE OUTPUT POWER LIMITING WWW.IXYS.COM WWW.IN-PLUG.COM WWW.IXYS.COM WWW.IN-PLUG.COM Design Kit and Evaluation System: 5W to 10W Ultra-Green Power Supply DESIGN KIT / EVALUATION SYSTEM – APPLICATION TOOL BRIEF IN-PLUG? Series. Gateway To Low Cost, High Efficiency SMPS Integration. Featured Component Description Less than 100mW of board standby power Low startup current < 70μA Operational current consumption as low as 350μA Only 150mW when output shorted Line and load overvoltage protections overload/short-circuit protection frequency Cycle skipping for very low board standby power System Features IPS18 – Ultra-Green Flyback Controller – ASIC Advantage The new IPS18 Ultra-Green flyback controller is a power saving technology used in Switch Mode Power Supplies to keep the power consumption to a minimum. It has been optimized for SMPSs in the 2 - 25 Watts power range that remain connected to the mains wall outlet with an active load, as well as for applications where an SMPS has to deliver a small amount of power in "light load" conditions. It monitors the output power from the primary and no secondary sensing circuitry is required, which also results in power and cost savings. It incorporates a special circuitry called “HICCUP” that involves a counter and other digital blocks which prevent delivering a high current to the load when overloaded. It enters cycle skipping in “no load” or light load” conditions to reduce standby power to a trickle. The IPS18 can be used in applications where the input voltage ranges from 12 to 400Volts. It also features adjustable frequency from 15 to 500KHz (operating at high frequency reduces size and cost of magnetic and decoupling components), separate P & N drive to simplify EMI control, line overvoltage protection and a thermal shutdown. In most of the applications below 10 Watts it saves costly filtering components such as X-Cap, Y-Cap. MOV etc... HICCUP Mode and Protection Against Feedback Loop Failure The IPS18 flyback controller offers a built-in overload protection called “HICCUP” and a protection against feedback loop failure with a simple low-cost Zener diode. (see ASIC Advantage HICCUP MODE FLYBACK CONTROLLERS flyer for details). IXTY1R4N60P – PolarHV? Power MOSFET – IXYS PolarHV? Power MOSFETs are designed with IXYS unique cell design and process improvements that dramatically enhance the power handling capability and system efficiency. These design and process changes provide “best-in-class” on-resistance, gate charge, thermal resistance and power handling capability. The PolarHV? line is offered in 500V and 600V versions, with current ratings to as high as 100A. Note that 800V and higher versions are also in development. DSS2-60AT2 – Schottky Diode – IXYS IXYS Schottky diodes feature very low forward voltage drop and switching loss, providing cost effective output recitification for switch-mode power supply applications. In addition, the 175°C rated junction temperature and low IRM extend the useful range for many of IXYS Schottky diodes. The DSS2-60AT2 is offered in the TO-92 to minimize board area and cost. ASIC Advantage Part Number – IPS-DK18 IXYS Part Number – EVPS001 IPS-DK18 / EVPS001 Schematic Featured Component Summary Table Part Number Company Summary Information Package Qty per Pack / Packing Style IPS18C-D(1) ASIC Advantage Adj. Frequency, Overload Protected, Low Standby PWM Controller 8-Pin PDIP 50 / Tube IPS18C-SO(1) ASIC Advantage Adj. Frequency, Overload Protected, Low Standby PWM Controller 8-Pin SOIC 98 / Tube IPS18C-SO(1)-TR ASIC Advantage Adj. Frequency, Overload Protected, Low Standby PWM Controller 8-Pin SOIC 2500 / Tape and Reel IXTY1R4N60P IXYS Corporation VDSS 600V, I d(25°C) 1.4A , RDS(on,25°C,Max) 9.0 Ω, Qg(on,Typ) 5.2 nC, R th,jc 2.5 K/W D-Pak 75 / Tube IXTY1R4N60PTRL IXYS Corporation VDSS 600V, I d(25°C) 1.4A , RDS(on,25°C,Max) 9.0 Ω, Qg(on,Typ) 5.2 nC, R th,jc 2.5 K/W D-Pak 800 / Tape and Reel DSS2-60AT2 IXYS Corporation VRSM/RRM 60V, I FAV(Tc = 85°C) 2A, V F(Typ, Tj = 125°C).43V, Rth,jb 80 K/W TO-92 1000 / Bulk DSS2-60AT2AP IXYS Corporation VRSM/RRM 60V, I FAV(Tc = 85°C) 2A, V F(Typ, Tj = 125°C).43V, Rth,jb 80 K/W TO-92 2000 / Ammo Pack Add “-G-LF” in place of (1) to denote RoHS + Lead Free. Excellent Standby Operation And Overload Protection 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 100 120 140 160 180 200 220 Average Output Power in Overload Condition F(Vin) / Hiccup Mode Vin (VAC) R13 1k R143MEG C8 220pF IXYS IXTY1R4N60P 2A 60VIXYS DSS2-60AT2 C10 100uF 16V 105C Q1 1.4A/600V TX1 R2 1.2MEG strapJ1 R9 2.2K C7 220pF VOUT- D3 SCHOTTKY ACIN1 GNDPRIMARY R7 6.19k 1% R6 23.7k 1% D1 D2 1N4148 VOUT+ U3 OPTO Q817C C3 10uF 16V R10A 1k OR PROTECTION ZENER DIODE (1N4743A) C5 100uF 16V 105C C6 R81k 0805 R5 240K 0805 ACIN2 C9 68nF 0805 R10 1k C4 180pF500V R11 100K 1% 0805 0805 0805 U1 IPS18 R41.5_ohm C210uF 400V C1 10uF 400V D51 TL431ILP Q1 TAB PATENTEDSNUBBER EI/EE CORE FERRITETRANSFORMER 13MM R3 470 1/2W 10MEG 1% L1 330uH - D6BRIDGE GNDSECONDARY 2 3 Pout(W) Standby Power in “No Load” Conditions ? Design Kit and Evaluation System Available for Qualified Designers 0 20 40 60 80 100 120 140 160 180 200 100 120 140 160 180 200 220 Vin (VAC) Pin (mW) PDRIVE NDRIVE ISENSE VCC RBIAS OVERV OPTO GND |
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