LNK584-586 LinkZero-AX ™ Zero Standby Consumption Integrated Off-Line Switcher Product Highlights Lowest System Cost with Zero Standby Consumption • Simple system configuration provides zero consumption standby/Power-Down with user controlled wake up • Very tight IC parameter tolerances improves system manufacturing yield • Suitable for low-cost clampless designs • Frequency jittering greatly reduces EMI filter cost • Extended package creepage improves system field reliability Advanced Protection/Safety Features • Hysteretic thermal shutdown protection – automatic recovery reduces field returns • Universal input range allows worldwide operation • Auto-restart reduces delivered power by >85% during short-circuit and open loop fault conditions • Simple ON/OFF control, no loop compensation needed • High bandwidth provides fast turn on with no overshoot EcoSmart™ – Energy Efficient • Standby/Power-Down consumption less than 3 mW at 325 VDC input (Note 1) • Easily meets all global energy efficiency regulations with no added components • ON/OFF control provides constant efficiency to very light loads Applications • Ultra low consumption isolated or non-isolated standby and auxiliary supplies Description LinkZero-AX combines extremely low standby/Power-Down energy use with the industry’s lowest component count standby supply solution. Below 3 mW at 230 VAC in Power-Down (PD) mode meets IEC 62301 definition of zero power consumption and is immeasurable on most power meters. LinkZero-AX is set into Power-Down mode using an external signal to pull the FEEDBACK pin high for 2.5 ms. Such an external signal can be generated by a system micro controller or infrared controller. In Power-Down mode the BYPASS pin remains regulated allowing the LinkZero-AX to be woken up with a reset pulse to pull the BYPASS pin below a reset threshold (1.5 V). Ultra low system consumption is therefore achieved without needing to disconnect the input voltage with a relay. + + DC PIN <0.00 W at 325 VDC in Power Down Mode Wide Range High-Voltage DC Input Output D LinkZero-AX FB BP/M S CBP Power Down Pulse ≥2.5 ms Reset/Wake Up Pulse PI-5909-120710 Figure 1. Typical Application Schematic. Output Power Table 230 VAC ±15% 85-265 VAC Open Frame2 Open Frame2 LNK584DG 3W 3W LNK584GG 3W 3W LNK585DG 4.5 W 4W LNK585GG 5W 4.5 W Product3 LNK586DG 6W 5W LNK586GG 6.5 W 5.5 W Table 1. Output Power Table. Notes: 1. IEC 62301 Clause 4.5 rounds standby power use below 5 mW to zero. 2. Maximum practical continuous power in an open frame design with adequate heat sinking, measured at 50 °C ambient. 3. Packages: D: SO-8C, G: SMD-8C. LinkZero-AX is designed to be used in isolated or non-isolated converters. In either, the tightly specified FEEDBACK (FB) pin voltage reference enables universal input primary side regulated power supplies that cost effectively replace unregulated linear transformer and other switched mode supplies. The start-up and operating power are derived directly from the DRAIN pin. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI, minimizing filter cost. www.powerint.com May 2011 LNK584-586 BYPASS/ MULTI FUNCTION (BP/M) PU OPEN LOOP PULL UP OVERVOLTAGE PROTECTION + + GENERATOR FEEDBACK REF 1.70 V 3V 6.5 V 5.85 V 4.85 V + AUTO-RESTART COUNTER FEEDBACK (FB) RESET + DRAIN (D) REGULATOR 5.85 V + BYPASS PIN UNDERVOLTAGE - FAULT CURRENT LIMIT + JITTER - VI 0.9 V LIMIT CLOCK CC CUT BACK 1.70 V - 0.9 V ADJ DCMAX S Q R Q OSCILLATOR SYSTEM POWER DOWN POWER DOWN COUNTER 160 fOSC CYCLES RESET LEADING EDGE BLANKING PU PI-5912-110910 Figure 2. SOURCE (S) Functional Block Diagram. Pin Functional Description DRAIN (D) Pin: The power MOSFET drain connection provides internal operating current for both start-up, steady-state and PowerDown mode operation. BYPASS/MULTI-FUNCTIONAL (BP/M) Pin: An external bypass capacitor, 0.1 mF or greater for the internally generated 5.85 V supply is connected to this pin. The minimum value of capacitor is 0.1 mF for internal circuit operation. Higher values may be required to enter Power-Down mode (see LinkZero-AX Power-Down (PD) Mode Design Considerations). An overvoltage protection disables MOSFET switching if the current into the pin exceeds 6.5 mA (ISD). FEEDBACK (FB) Pin: During normal operation, switching of the power MOSFET is controlled by this pin. MOSFET switching is disabled when a voltage greater than an internal VFB reference voltage is applied to this pin. The VFB reference voltage is internally set to 1.70 V. LinkZero-AX goes into auto-restart mode when the FEEDBACK pin voltage has come down to 0.9 V. G Package (SMD-8C) BP/M 1 FB 2 8 S 7 S 6 D 5 4 3a D Package (SO-8C) BP/M FB 1 8 2 7 6 S S D 4 5 S S S S 3b PI-5910-090810 Figure 3. Pin Configuration. SOURCE (S) Pin: This pin is the power MOSFET source connection. It is also the ground reference for the BYPASS and FEEDBACK pins. 2 Rev. B 05/11 www.powerint.com LNK584-586 LinkZero-AX Functional Description LinkZero-AX comprises a 700 V power MOSFET switch with a power supply controller on the same die. Unlike conventional PWM (pulse width modulation) controllers, it uses a simple ON/OFF control to regulate the output voltage. The controller consists of an oscillator, feedback (sense and logic) controller, 5.85 V regulator, BYPASS pin undervoltage protection, overtemperature protection, frequency jittering, current limit protection, and leading edge blanking. The controller includes a proprietary Power-Down mode that automatically reduces standby consumption to levels that are immeasurable on most power meters. Power-Down Mode The internal controller will go into Power-Down mode when 160 switching cycles are skipped. This can occur due to the FEEDBACK pin being pulled high using an external Power-Down pulse signal or due to a light load condition where the total loading on the transformer (output plus feedback circuit loads) has reduced to ~0.6% of full load. The device then operates in an ultra low consumption Power-Down mode where switching is disabled completely. The controller wakes up (or is reset) when the BYPASS pin is pulled below 1.5 V and then released to be recharged through the internal drain connected 5.85 V regulator block (see Figure 2). When the BYPASS capacitor recharges to the VBP BYPASS pin threshold, the device starts switching and operates normally. If the FEEDBACK pin is pulled high such that 160 cycles are again skipped, the device returns to Power-Down mode operation as described above. In applications with dynamic loads it may not be desirable to go into Power-Down mode under light or no-load conditions. Techniques to ensure this is avoided are discussed below in the LinkZero-AX Power-Down Mode Design Considerations section. Oscillator The typical oscillator frequency is internally set to an average of 100 kHz. An internal circuit senses the duty cycle of the MOSFET switch conduction-time and adjusts the oscillator frequency so that during long conduction intervals (low line voltage) the frequency is about 100 kHz and at short conduction intervals (high line voltage) the oscillator frequency is about 78 kHz. This internal frequency adjustment is used to make the peak power point constant over line voltage. Two signals are generated from the oscillator: the maximum duty cycle signal (DCMAX) and the clock signal that indicates the beginning of a switching cycle. The oscillator incorporates circuitry that introduces a small amount of frequency jitter, typically 6% of the switching frequency, to minimize EMI. The modulation rate of the frequency jitter is set to 1 kHz to optimize EMI reduction for both average and quasi-peak measurements. The frequency jitter, which is proportional to the oscillator frequency, should be measured with the oscilloscope triggered at the falling edge of the DRAIN voltage waveform. The oscillator frequency is gradually reduced when the FEEDBACK pin voltage is lowered below 1.70 V. Feedback Input Circuit CV Mode The feedback input circuit reference is set at 1.70 V. When the FEEDBACK pin voltage reaches a VFB reference voltage (1.70 V), a low logic level (disable) is generated at the output of the feedback circuit. This output is sampled at the beginning of each cycle. If high, the power MOSFET is turned on for that cycle (enabled), otherwise the power MOSFET remains off (disabled). Since the sampling is done only at the beginning of each cycle, subsequent changes in the FEEDBACK pin voltage during the remainder of the cycle are ignored. Output Power Limiting When the FEEDBACK pin voltage at full load falls below 1.70 V, the oscillator frequency linearly reduces to typically 60% at the auto-restart threshold voltage of 0.9 V. This function limits the power supply output current and power. 5.85 V Regulator The BYPASS pin voltage is regulated by drawing a current from the DRAIN whenever the MOSFET is off if needed to charge up the BYPASS pin to a typical voltage of 5.85 V. When the MOSFET is on, LinkZero-AX runs off of the energy stored in the bypass capacitor. Extremely low power consumption of the internal circuitry allows LinkZero-AX to operate continuously from the current drawn from the DRAIN pin. A bypass capacitor value of 0.1 µF is sufficient for both high frequency decoupling and energy storage. 6.5 V Shunt Regulator and 8.5 V Clamp In addition, there is a shunt regulator that helps maintain the BYPASS pin at 6.5 V when current is provided to the BYPASS pin externally. This facilitates powering the device externally through a resistor from the bias winding or power supply output in non-isolated designs, to decrease device dissipation and increase power supply efficiency. The 6.5 V shunt regulator is only active in normal operation, and when in Power-Down mode a clamp at a higher voltage (typical 8.5 V) will clamp the BYPASS pin. BYPASS Pin Undervoltage Protection The BYPASS pin undervoltage circuitry disables the power MOSFET when the BYPASS pin voltage drops below 4.85 V. Once the BYPASS pin voltage drops below 4.85 V, it must rise back to 5.85 V to enable (turn on) the power MOSFET. BYPASS Pin Overvoltage Protection If the BYPASS pin gets pulled above 6.5 V and the current into the shunt exceeds 6.5 mA a latch will be set and the power MOSFET will stop switching. To reset the latch the BYPASS pin has to be pulled down to below 1.5 V. Over-Temperature Protection The thermal shutdown circuit senses the die temperature. The threshold is set at 142 °C typical with a 70 °C hysteresis. When the die temperature rises above this threshold (142 °C) the power MOSFET is disabled and remains disabled until the die temperature falls by 70 °C, at which point the MOSFET is re-enabled. Current Limit The current limit circuit senses the current in the power MOSFET. When this current exceeds the internal threshold (ILIMIT ), the power MOSFET is turned off for the remainder of that cycle. The leading edge blanking circuit inhibits the current limit 3 www.powerint.com Rev. B 05/11 LNK584-586 comparator for a short time (tLEB) after the power MOSFET is turned on. This leading edge blanking time has been set so that current spikes caused by capacitance and rectifier reverse recovery time will not cause premature termination of the MOSFET conduction. Auto Restart In the event of a fault condition such as output short-circuit, LinkZero-AX enters into auto-restart operation. An internal counter clocked by the oscillator gets reset every time the FEEDBACK pin voltage exceeds the FEEDBACK pin auto-restart threshold voltage (VFB(AR) typical 0.9 V). If the FEEDBACK pin voltage drops below VFB(AR) for more than 145 ms to 170 ms depending on the line voltage, the power MOSFET switching is disabled. The auto-restart alternately enables and disables the switching of the power MOSFET at a duty cycle of typically 12% until the fault condition is removed. Open Loop Condition on the FEEDBACK Pin When an open loop condition on the FEEDBACK pin is detected, an internal current source pulls up the FEEDBACK pin to above the VFB (1.70 V), the part stops switching and after 160 clock cycles goes into latched Power-Down mode. Applications Example The circuit shown in Figure 4 is a typical non-isolated 5 V, 300 mA output auxiliary power supply using LinkZero-AX. Isolated configurations are also fully compatible with the LinkZero-AX where the FEEDBACK pin receives a signal from a primary feedback/bias winding or through an optocoupler. The circuit of Figure 4 is typical of auxiliary supplies in white goods where isolation is often not required. AC input differential filtering is accomplished by the π filter formed by C1, C2 and L3. The proprietary frequency jitter feature of the LinkZero-AX eliminates the need for any Y capacitor or common-mode inductor. Wirewound resistor RF1 is a fusible, flame proof resistor which is used as a fuse as well as to limit inrush current. Wire wound types are recommended for designs that operate >132 VAC to withstand the instantaneous power dissipated when AC is first applied. The output voltage is directly sensed through feedback resistors R3 and R9, and regulated by LinkZero-AX (U1) via the FEEDBACK pin. Capacitor C7 provides high frequency filtering on the FEEDBACK pin to filter noise and to avoid switching cycle pulse bunching. The controller in U1 receives feedback from the output through feedback resistors R9 and R3. Based on that feedback, it enables or disables the switching of its integrated MOSFET to maintain output regulation. Switching cycles are skipped once the FEEDBACK pin threshold voltage (1.70 V) is exceeded. When the voltage on the FEEDBACK pin falls below the disable threshold (1.70 V), switching cycles are re-enabled. By adjusting the ratio of enabled to disabled switching cycles the output voltage is regulated. At increased loads, beyond the output peak power point, where all switching cycles are enabled, the FEEDBACK pin voltage begins to reduce as the power supply output voltage falls. Under this condition the switching frequency is also reduced to limit the maximum output overload power. When the FEEDBACK pin voltage drops below the auto-restart threshold (typically 0.9 V on the FEEDBACK pin), the power supply enters the auto-restart mode. In this mode, the power supply will turn off for approximately 1.2 s and then turn back on for approximately 145 ms. The auto-restart function reduces the average output current during an output short-circuit condition. C4 R8 220 pF 5.1 Ω 100 V L3 1 mH D6 SS15 R2 4.7 kΩ D1 1N4007 L4 1.8 µH T1 3 EE16 8 D2 1N4007 1 10 C6 220 µF 25 V C9 330 nF 50 V C1 3.3 µF 400 V R9 1 kΩ 1% LinkZero-AX U1 LNK584DG C2 3.3 µF 400 V D Q1 MMBT3904 FB BP/M R16 750 Ω S D3 1N4007 5 V, 300 mA RTN RF1 10 Ω 2W 85 - 265 VAC C8 R13 56 µF 510 Ω 16 V D4 1N4007 R12 20 kΩ R10 20 kΩ PD Set R11 100 Ω C5 150 nF 25 V C10 47 µF 25 V C7 1 nF 50 V R3 511 Ω 1% SW1 Q2 MMBT3904 PD Reset R4 10 kΩ R14 2 kΩ RTN PI-6121-101210 Figure 4. Schematic of Non-Isolated 1.5 W, 5 V, 300 mA, 0.00 W Standby Consumption Power Supply. 4 Rev. B 05/11 www.powerint.com LNK584-586 The LinkZero-AX device is self biased through the DRAIN pin. An optional external bias, can be derived either from a third winding or from an output voltage rail in non-isolated designs. By providing an external supply current in excess of IS2 (310 mA for the LNK584) the internal 5.85 V regulator circuit is disabled providing a simple way to reduce device temperature and improve efficiency, especially at high line. A clampless primary circuit is achieved due to the very tight tolerance current limit device, plus the transformer construction techniques used. The peak drain voltage is therefore limited to typically less than 550 V at 265 VAC, providing significant margin to the 700 V minimum drain voltage specification (BVDSS). Output rectification and filtering is achieved with output rectifier D6 and filter capacitor C6. Due to the auto-restart feature, the average short-circuit output current is significantly less than 1 A, allowing low current rating and low cost rectifier D6 to be used. Output circuitry is designed to handle a continuous short-circuit on the power supply output. In this design a preload resistor R13 is used at the output of the supply to prevent automatic triggering of the Power-Down mode when the load is removed. LinkZero-AX Power-Down (PD) Mode Design Considerations LinkZero-AX goes into Power-Down mode when 160 consecutive switching cycles have been skipped. This condition occurs when the output load is low or the FEEDBACK pin is pulled high (for example through Q1 and R16 in Figure 4). The value of the BYPASS pin capacitor must be high enough to sustain enough current through R16 for more than the period of 160 switching cycles to successfully trigger the Power-Down mode. At low line input voltage (90 VAC) the 160 switching cycle period is ~1.6 ms as the internal oscillator frequency is 100 kHz. However as the input line voltage increases, the internal oscillator frequency is gradually reduced to keep the maximum output power relatively constant. At high line (265 VAC) therefore, the internal oscillator frequency can be as low as 78 kHz (see parameter table Note C). Therefore to provide sufficient margin to ensure Power-Down mode is triggered it is recommended that the Power-Down pulse (see Figure 1) is 2.5 ms (200 switching cycles at 80 kHz). LinkZero-AX stops switching once the Power-Down mode is triggered. The IC does not resume switching until the BYPASS pin is pulled below 1.5 V using the reset/wake up pulse (see Figure 1) and then allowed to recharge back up to 5.85 V through the drain connected 5.85 V regulator block. Transistor Q2 or mechanical switch SW1 can be used for resetting the Power-Down mode either electronically or mechanically. It is important to design the power supply to ensure that load transients and other external events do not unintentionally trigger Power-Down mode by causing 160 consecutive switching cycles to be skipped. It is recommended that a preload resistor is added to draw ~2% of the full load current (12 mA at 5 V in a 3 W power supply). Although this reduces full load efficiency slightly, it has no influence on the power consumption during Power-Down mode since the power supply output is fully discharged under this condition. Low value feedback resistors may also be used as a preload too. Recommended value of the feedback resistors is such that they should draw ~1% of full load current. Finally a capacitor in parallel to the high side feedback resistor can be used to increase the speed of the loop (C9 in Figure 4). These recommendations apply for full load to zero load transients. For applications with more limited load range, the preload and the capacitor in parallel to the high side feedback resistor may not be necessary. Layout Considerations LinkZero-AX Layout Considerations Layout See Figure 5 for a recommended circuit board layout for LinkZero-AX (U1). Single Point Grounding Use a single point ground (Kelvin) connection from the input filter capacitor to the area of copper connected to the SOURCE pins. Bypass Capacitor (CBP), FEEDBACK Pin Noise Filter Capacitor (CFB) and Feedback Resistors To minimize loop area, these two capacitors should be physically located as near as possible to the BYPASS and SOURCE pins, and FEEDBACK pin and source pins respectively. Also note that to minimize noise pickup, feedback resistors RFB1 and RFB2 are placed close to the FEEDBACK pin. Primary Loop Area The area of the primary loop that connects the input filter capacitor, transformer primary and LinkZero-AX should be kept as small as possible. Primary Clamp Circuit An external clamp may be used to limit peak voltage on the DRAIN pin at turn off. This can be achieved by using an RCD clamp or a Zener (~200 V) and diode clamp across the primary winding. In all cases, to minimize EMI, care should be taken to minimize the circuit path from the clamp components to the transformer and LinkZero-AX (U1). Thermal Considerations The copper area underneath the LinkZero-AX (U1) acts not only as a single point ground, but also as a heat sink. As it is connected to the quiet source node, this area should be maximized for good heat sinking of U1. The same applies to the cathode of the output diode. Y Capacitor The placement of the Y-type capacitor (if used) should be directly from the primary input filter capacitor positive terminal to the common/return terminal of the transformer secondary. Such a placement will route high magnitude common-mode surge currents away from U1. Note: If an input π EMI filter is used, the inductor in the π filter should be placed between the negative terminals on the input filter capacitors. 5 www.powerint.com Rev. B 05/11 LNK584-586 DB CB RS CS DBP RBP DO RFB2 CFB CO CBP RFB1 R6 Transformer U1 J3 – HV DC IN T1 + – + LV DC OUT PI-6098-092410 Figure 5. PCB Layout of a 2.1 W, 6 V, 350 mA Charger. Output Diode (DO) For best performance, the area of the loop connecting the secondary winding, the output diode (DO) and the output filter capacitor (CO) should be minimized. In addition, sufficient copper area should be provided at the anode and cathode terminals of the diode for heat sinking. A larger area is preferred at the electrically “quiet” cathode terminal. A large anode area can increase high frequency conducted and radiated EMI. Resistor RS and CS represent the secondary side RC snubber. Quick Design Checklist As with any power supply design, all LinkZero-AX designs should be verified on the bench to make sure that component specifications are not exceeded under worst-case conditions. The following minimum set of tests is strongly recommended: 1. Maximum drain voltage – Verify that VDS does not exceed 660 V at the highest input voltage and peak (overload) output power. This margin to the 700 V BVDSS specification gives margin for design variation, especially in clampless designs. 2. Maximum drain current – At maximum ambient temperature, maximum input voltage and peak output (overload) power, verify drain current waveforms for any signs of transformer saturation and excessive leading-edge current spikes at start-up. Repeat under steady state conditions and verify that the leading-edge current spike event is below ILIMIT(MIN) at the end of the tLEB(MIN). Under all conditions, the maximum drain current should be below the specified absolute maximum ratings. 3. Thermal check – At specified maximum output power, minimum input voltage and maximum ambient temperature, verify that the temperature specifications are not exceeded for LinkZero-AX, transformer, output diode and output capacitors. Enough thermal margin should be allowed for part-to-part variation of the RDS(ON) of LinkZero-AX as specified in the data sheet. Under low line and maximum power, maximum LinkZero-AX source pin temperature of 100 °C is recommended to allow for these variations. 6 Rev. B 05/11 www.powerint.com LNK584-586 Absolute Maximum Ratings(1,6) DRAIN Voltage ...........................................................-0.3 V to 700 V Peak DRAIN Current (2): LNK584............................200 (375) mA LNK585............................370 (680) mA LNK586............................440 (825) mA Peak Negative Pulsed Drain Current(3).............................. -100 mA Feedback Voltage ......................................................... -0.3 V to 9 V Feedback Current ................................................................ 100 mA. BYPASS Pin Voltage .................................................... -0.3 V to 9 V BYPASS Pin Voltage in Power-Down Mode(7)........ -0.3 V to 11 V Storage Temperature ............................................ -65 °C to 150 °C Operating Junction Temperature(4).....................-40 °C to 150 °C Lead Temperature(5) .................................................................260 °C Notes: 1. All voltages referenced to SOURCE, TA = 25 °C. 2. Higher peak DRAIN current allowed while DRAIN source voltage does not exceed 400 V. 3. Duration not to exceed 2 ms. 4. Normally limited by internal circuitry. 5. 1/16 in. from case for 5 seconds. 6. Maximum ratings specified may be applied, one at a time without causing permanent damage to the product. Exposure to Absolute Maximum ratings for extended periods of time may affect product reliability. 7. Maximum current into pin is 300 mA. Thermal Resistance Thermal Resistance: D Package: (qJA) ..................................100 °C/W(2); 80 °C/W(3) (qJC) ..........................................................30 °C/W(1) G Package: (qJA) ....................................70 °C/W(2); 60 °C/W(3) (qJC) .......................................................... 11 °C/W(1) Parameter Notes: 1. Measured on the SOURCE pin close to plastic interface. 2. Soldered to 0.36 sq. in. (232 mm2), 2 oz. copper clad. 3. Soldered to 1 sq. in. (645 mm2), 2 oz. copper clad. Symbol Conditions SOURCE = 0 V; TJ = -40 to 125 °C (Unless Otherwise Specified) Min Typ Max Units fOSC TJ = 25 °C VFB = 1.70 V, See Note B 93 100 107 kHz Control Functions Output Frequency Frequency Jitter Peak-Peak Jitter Compared to Average Frequency, TJ = 25 °C ±3 % TJ = 25 °C VFB = VFB(AR) 60 % % Ratio of Output Frequency at Auto-Restart to fOSC fOSC(AR) fOSC Maximum Duty Cycle DCMAX 60 63 FEEDBACK Pin Voltage VFB 1.63 1.70 1.77 V FEEDBACK Pin Voltage at AutoRestart VFB(AR) 0.8 0.9 1.05 V Minimum Switch ON-Time tON(MIN) IS1 DRAIN Supply Current IS2 700 Feedback Voltage > VFB (MOSFET not Switching) 0.9 V ≤ VFB ≤ 1.70 V (MOSFET Switching) ns 200 260 LNK584 260 310 LNK585 275 330 LNK586 285 340 mA mA 7 www.powerint.com Rev. B 05/11 LNK584-586 Parameter Symbol Conditions SOURCE = 0 V; TJ = -40 to 125 °C (Unless Otherwise Specified) Min Typ Max Units LNK584 -5.5 -3.8 -1.8 LNK585-586 -7.0 -5.3 -3.3 LNK584 -3.8 -2.5 -1.0 LNK585-586 -4.8 -3.5 -2.0 VBP 5.60 5.85 6.10 V VBP(H) 0.8 1.0 1.2 V BYPASS Pin Shunt Voltage BPSHUNT 6.1 6.5 6.9 V BYPASS Pin Supply Current IBPSC Control Functions (cont.) BYPASS Pin Charge Current ICH1 ICH2 BYPASS Pin Voltage BYPASS Pin Voltage Hysteresis VBP = 0 V, TJ = 25 °C VBP = 4 V, TJ = 25 °C See Note D 84 mA mA Circuit Protection Current Limit Power Coefficient ILIMIT I2f di/dt = 40 mA/ms TJ = 25 °C LNK584 126 136 146 di/dt = 75 mA/ms TJ = 25 °C LNK585 232 250 268 di/dt = 90 mA/ms TJ = 25 °C LNK586 279 300 321 di/dt = 40 mA/ms TJ = 25 °C LNK584 1665 1850 2091 di/dt = 75 mA/ms TJ = 25 °C LNK585 5625 6250 7063 di/dt = 90 mA/ms TJ = 25 °C LNK586 8100 9000 10170 mA A2Hz Leading Edge Blanking Time tLEB TJ = 25 °C 220 265 BYPASS Pin Shutdown Threshold Current ISD VBP = BPSHUNT See Note F 5.0 6.5 8.0 mA Thermal Shutdown Temperature TSD See Note A 135 142 150 °C Thermal Shutdown Hysteresis TSD(H) See Note A 70 OFF-State Drain Leakage in Power-Down Mode IDSS(PD) TJ = 25 °C, VDRAIN = 325 V See Figure 21 6.5 9 mA BYPASS Pin Overvoltage Protection in Power-Down Mode VBP(PDP) IBP = 300 mA -5 °C ≤ TJ ≤ 100 °C 7.0 8.5 10.9 V BYPASS Pin Power-Up Reset Threshold (in Power-Down Mode or at Power Supply Start-up) VBP(PU) 1.5 3 4 V ns °C Power-Down (PD) Mode 8 Rev. B 05/11 www.powerint.com LNK584-586 Parameter Symbol Conditions SOURCE = 0 V; TJ = -40 to 125 °C (Unless Otherwise Specified) Min Typ Max Units Power-Down (PD) Mode (cont.) BYPASS Pin Voltage in Power-Down Mode VBP(PD) BYPASS PinPowerDown to Power-Up Threshold Delta VBP(PD) - VBP(PU) BYPASS Pin Supply Current in Power-Down Mode IBP(PD) IBP = 500 mA VBP = VBP(PD) See Note E 4 V 0.5 V 500 mA Output LNK584 ID = 13 mA ON-State Resistance RDS(ON) LNK585 ID = 26 mA LNK586 ID = 33 mA Breakdown Voltage BVDSS TJ = 25 °C 48 55 TJ = 100 °C 76 88 TJ = 25 °C 24 28 TJ = 100 °C 38 44 TJ = 25 °C 19 22 TJ = 100 °C 30 35 VBP = 6.2 V, TJ = 25 °C DRAIN Supply Voltage Auto-Restart ON-Time tAR Auto-Restart Duty Cycle Output Enable Delay tEN VIN = 85 VAC, TJ = 25 °C, See Note C W 700 V 50 V 145 ms 11 % See Figure 8 14 ms NOTES: A. This parameter is derived from characterization. B. Output frequency specification applies to low line input voltage in the final application. The controller is designed to reduce output frequency by approximately 20% at high line input voltages to balance low line and high line maximum output power. C. The auto-restart on-time/off-time is increased by 20% from low to high line voltage input (85 VAC to 265 VAC). D. IBPSC is the current that can be supplied from the BYPASS pin at 5.85 V when in normal switching mode of operation to power an optional external circuit. The current will be supplied from the Drain via the internal BYPASS pin voltage regulator. When calculating the power consumption the IBPSC (84 mA max) and the drain voltage has to be taken into account. More current can be sourced during Power-Down mode – see Note F. E. IBPSC(PD) is the current that can be supplied from the BYPASS pin at 4 V when in Power-Down mode to power an optional external circuit. The current will be supplied from the Drain via the internal BYPASS pin voltage regulator. Lower current is available during normal operation - see Note E. If the external circuit requires current in excess of IBP(PD) in Power-Down mode, it must be supplied from an external source such as a bias winding. The IBP(PD) current adds to power supply power consumption during Power-Down mode – for example at 230 VAC (325 VDC rectified DC rail voltage) the power consumption with be 325 × IBP(PD). F. LinkZero-AX shuts down if the current into the BYPASS pin reaches ISD at the BPSHUNT voltage. 9 www.powerint.com Rev. B 05/11 LNK584-586 BP/M S FB S S 0.1 µF 0-2 V S1 D 470 Ω 5W S 50 V PI-6067-072110 Figure 6. General Test Circuit. DCMAX t2 HV 90% (internal signal) t1 tP 90% FB DRAIN VOLTAGE 0V t D= 1 t2 tEN VDRAIN 10% tP = 1 fOSC PI-3707-112503 PI-2048-033001 Figure 8. Output Enable Timing. PI-4021-101305 Figure 7. Duty Cycle Measurement. Figure 9. Peak Negative Pulsed DRAIN Current Waveform. 10 Rev. B 05/11 www.powerint.com LNK584-586 Typical Performance Characteristics 1.0 0.9 -50 -25 0 25 50 PI-6065-071910 1.2 Output Frequency (Normalized to 25 °C) PI-2213-012301 Breakdown Voltage (Normalized to 25 °C) 1.1 1.0 0.8 0.6 0.4 0.2 0 75 100 125 150 -50 -25 Junction Temperature (°C) Figure 10. Breakdown vs. Temperature. 25 50 75 100 125 Figure 11. Frequency vs. Temperature. 1.0 0.8 PI-4057-071905 Current Limit (Normalized to 25 °C) 1.2 1.1 FEEDBACK Pin Voltage (Normalized to 25 °C) PI-6066-071910 1.4 1.0 0.6 0.4 0.2 0.9 0 -50 0 50 100 -50 -25 150 0 25 50 75 100 125 150 Temperature (°C) Temperature (°C) Figure 12. Current Limit vs. Temperature. Figure 13. FEEDBACK Pin Voltage vs. Temperature. 5 4 3 2 1 PI-3927-083104 6 200 175 DRAIN Current (mA) PI-2240-012301 7 BYPASS Pin Voltage (V) 0 Junction Temperature (°C) 150 125 100 75 50 25 0 0 0 0.2 0.4 0.6 0.8 Time (ms) Figure 14. BYPASS Pin Start-up Waveform (CBP = 0.22 mF). 1.0 0 2 4 6 8 10 12 14 16 18 20 DRAIN Voltage (V) Figure 15. Output Characteristics. 11 www.powerint.com Rev. B 05/11 LNK584-586 Typical Performance Characteristics (cont.) 100 Frequency (kHz) 100 10 PI-6068-071910 110 PI-3928-083104 Drain Capacitance (pF) 1000 90 80 70 1 60 0 100 200 300 400 500 0 600 10 Drain Voltage (V) 50 60 70 30 20 10 0 -10 -20 PI-6071-072110 40 0 FEEDBACK Pin Current (µA) PI-6070-072110 FEEDBACK Pin Current (µA) 40 Figure 17. Frequency Reduction vs. Duty Cycle (Line Voltage). 50 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -30 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 7.0 FEEDBACK Pin Voltage (V) FEEDBACK Pin Voltage (V) Figure 18. FEEDBACK Pin Input Characteristics. Figure 19. FEEDBACK Pin Input Characteristics During Output Power Limiting (1.70 V to 0.9 V). 9 Drain Current (µA) Auto-Restart PI-6111-081810 10 PI-6139-091010 FEEDBACK Pin Current (µA) 30 Duty Cycle (%) Figure 16. CDSS vs. Drain Voltage. 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 20 8 7 6 5 4 3 2 1 0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Frequency Normalized to 1 Figure 20. Frequency Cut Back During Output Power Limiting. -50 -25 0 25 50 75 100 125 Temperature (°C) Figure 21. Typical Drain Current vs. Temperature in Power-Down Mode. 12 Rev. B 05/11 www.powerint.com LNK584-586 SO-8C (D Package) 4 B 0.10 (0.004) C A-B 2X 2 DETAIL A 4.90 (0.193) BSC A 8 4 D 5 2 3.90 (0.154) BSC GAUGE PLANE SEATING PLANE 6.00 (0.236) BSC C 0-8 1.04 (0.041) REF 0.10 (0.004) C D 2X Pin 1 ID 1 0.40 (0.016) 1.27 (0.050) 0.20 (0.008) C 2X 7X 0.31 - 0.51 (0.012 - 0.020) 0.25 (0.010) M C A-B D 1.27 (0.050) BSC 1.35 (0.053) 1.75 (0.069) 4 0.25 (0.010) BSC 1.25 - 1.65 (0.049 - 0.065) 0.10 (0.004) 0.25 (0.010) DETAIL A 0.10 (0.004) C H 7X SEATING PLANE C Reference Solder Pad Dimensions 2.00 (0.079) 4.90 (0.193) 0.17 (0.007) 0.25 (0.010) Notes: 1. JEDEC reference: MS-012. 2. Package outline exclusive of mold flash and metal burr. 3. Package outline inclusive of plating thickness. 4. Datums A and B to be determined at datum plane H. 5. Controlling dimensions are in millimeters. Inch dimensions are shown in parenthesis. Angles in degrees. D07C 1.27 (0.050) 0.60 (0.024) PI-4526-040110 13 www.powerint.com Rev. B 05/11 LNK584-586 SMD-8C (G Package) ⊕ D S .004 (.10) .046 .060 .060 .046 -E- .080 .086 Pin 1 .137 (3.48) MINIMUM Solder Pad Dimensions .420 .367 (9.32) .387 (9.83) .057 (1.45) .068 (1.73) (NOTE 5) .125 (3.18) .145 (3.68) .032 (.81) .037 (.94) .286 Pin 1 .100 (2.54) (BSC) -D- .186 .372 (9.45) .388 (9.86) ⊕ E S .010 (.25) .240 (6.10) .260 (6.60) Notes: 1. Controlling dimensions are inches. Millimeter sizes are shown in parentheses. 2. Dimensions shown do not include mold flash or other protrusions. Mold flash or protrusions shall not exceed .006 (.15) on any side. 3. Pin locations start with Pin 1, and continue counter-clockwise to Pin 8 when viewed from the top. Pin 3 is omitted. 4. Minimum metal to metal spacing at the package body for the omitted lead location is .137 inch (3.48 mm). 5. Lead width measured at package body. 6. D and E are referenced datums on the package body. .048 (1.22) .053 (1.35) .004 (.10) .009 (.23) .004 (.10) .012 (.30) .036 (0.91) .044 (1.12) 0°- 8° G08C PI-4015-101507 14 Rev. B 05/11 www.powerint.com LNK584-586 Part Ordering Information • LinkSwitch Product Family • AX Series Number • Package Identifier D Plastic SO-8C G Plastic SMD-8C • Package Material G GREEN: Halogen Free and RoHS Compliant • Tape & Reel and Other Options Blank LNK 584 D G - TL TL Standard Configurations Tape & Reel, 2.5 k pcs minimum for D package, 1 k pcs minimum for G Package. 15 www.powerint.com Rev. B 05/11 Revision Notes Date A Initial release 10/10 B Added LNK585 and LNK586 05/11 For the latest updates, visit our website: www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. Patent Information The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or Power Integrationslly by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm. Life Support Policy POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS. As used herein: 1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii) whose failure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in significant injury or death to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, Qspeed, EcoSmart, Clampless, E-Shield, Filterfuse, StakFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies. ©2011, Power Integrations, Inc. Power Integrations Worldwide Sales Support Locations World Headquarters 5245 Hellyer Avenue San Jose, CA 95138, USA. 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