RDK-239 Power Integrations, Inc., RDK-239 Datasheet
RDK-239
Related parts for RDK-239
RDK-239 Summary of contents
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LCS700-708 Family HiperLCS ™ Integrated LLC Controller, High-Voltage Power MOSFETs and Drivers Product Highlights Features LLC half-bridge power stage incorporating controller, high and • low-side gate drives, and high-voltage power MOSFETs Eliminates external components • High maximum ...
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LCS700-708 VREF 3.4 V REGULATOR + LLC_ON OV/UV VSDH/ VSDL + VOVH/ VOVL + IS VISF 7 CONSECUTIVE + LLC CLOCK CYCLES VISS VREF FEEDBACK (FB) DT/BF DEBOUNCE + 3 LLC CLOCK CYCLES Bursting Thresholds DT/BF Control RESISTOR SENSOR Figure ...
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Pin Functional Description VCC Pin IC power pin typical application, VCC is connected to the 12 V system standby supply via resistor. This resistor helps provide filtering and improves noise immunity. Note: The system standby ...
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LCS700-708 Figure 4. 150 W Laser-Jet Printer Power Supply. 4 Rev. B 062011 www.powerint.com ...
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HiperLCS Basic Operation The HiperLCS is designed for half-bridge LLC converters, which are high-efficiency resonant, variable frequency converters. The HiperLCS is an LLC controller chip with built-in drivers and half-bridge MOSFETs. LLC converters require a fixed dead-time between switching half-cycles. ...
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LCS700-708 pulse width requirement for detection of both voltage thresholds is nominally 30 ns. i.e. the thresholds have to be exceeded for >30 ns for proper detection. Over-Temperature Shutdown The HiperLCS has latching OTP. VCCH must be cycled to resume ...
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Figure 7 shows a an example of preferred routing for the optocoupler and traces connected to the FEEDBACK pin. The optocoupler is spaced away from the transformer, reducing noise pickup. The optocoupler output trace (from pin 3) is also routed ...
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LCS700-708 Small Signal Bypass Capacitors Please refer to Figure 5 Note the location of the small signal bypass capacitors (highlighted) for the FEEDBACK, DT/BF, IS, VREF, OV/UV and VCC pins, which allow short traces to their pin connections and to ...
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Bootstrap Circuit and HB Node Layout Please refer to Figure 10. Note the location of the bootstrap diode, capacitor, resistor, and the HB trace routing. The objective is to keep them away from the small signal components and traces, such ...
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LCS700-708 Figure 10. Placement of Boot Strap Diode, Capacitor, Resistor and the High-Voltage Trace Routing. Figure 11. Placement of Capacitors Between Transformer Secondary Pins and 10 Rev. B 062011 Transformer Primary High-Side Secondary Output Rectifier Capacitors Center Tap Secondary the ...
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Key Design Details The LLC converter is a variable frequency resonant converter. As input voltage decreases, the frequency must decrease in order to maintain output regulation lesser extent, as load reduces the frequency must increase. When the converter ...
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LCS700-708 Resonant Frequency The series resonant frequency is a function of L resonant capacitor. For any given value can be adjusted for the desired series resonant frequency RES f . For best efficiency the resonant frequency is ...
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OV/UV pin resistor divider chosen for minimum required LLC gain 495 V VOVH 385 V 376 V VSDH 200 V Figure 14. OV/UV Pin Voltage Thresholds, at Minimum and Maximum Divider Ratios, for 385 V Nominal Input Voltage. If the ...
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LCS700-708 450 400 350 300 250 200 150 100 200 400 Frequency (kHz) Figure 16. FEEDBACK Pin and DT/BF Pin Current vs. Frequency. For example, if BT2 is selected, and f MAX = 300 kHz, and f ...
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VREF C R START FMIN R START FB R OPTO C FB 4.7 nF GND Figure 19. Feedback Network Shown with Additional Load Resistor. start-up frequency, and f , which is the burst mode start START (lower) threshold frequency. The ...
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LCS700-708 It should be noted that the 4.7 nF decoupling capacitor, C (see Figure 19), in conjunction with the 2.5 kW input resistance presented by the FEEDBACK pin, form a pole in the LLC transfer function. This can add significant ...
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The recommended series resistor value of 220 W and the bypass capacitor form a low-pass filter, and its time constant must not cause significant attenuation of the current sense signal at the nominal operating frequency. The effect of the attenuation ...
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LCS700-708 400 300 200 100 Time ( s) Figure 26. Zoom in of Last Few Switching Cycles of Burst Pulse Train of Figure 24. The Switching Frequency of the Last Few Cycles is f This Case ...
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Absolute Maximum Ratings Instantaneous Repetitive Current .................................. V LCS700................................ ........................ 5.2 A LCS701............................. ............................7.7 A LCS702.............................. ........................ 10.3 A LCS703 ................................................. 12.9 A LCS705............................... ....................... 19.3 A LCS708............................... ....................... 30.9 A Instantaneous Repetitive Current ...
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LCS700-708 Parameter Symbol Half-Bridge (cont.) ON-State Resistance R DS(ON) Half-Bridge C Capacitance HB Diode Forward V Voltage FWD Power Supply VCC Supply V Voltage Range CC VCCH Supply V Voltage Range CCH Start-Up Current I CC(OFF) Inhibit Current I CC(INHIBIT) ...
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Parameter Symbol VCCH Supply Undervoltage Lockout VCCH Start Threshold V UVLO(H+) VCCH Shutdown V Threshold UVLO(H-) VCCH Start-Up/ V Shutdown Hysteresis UVLO(H)HYST High-Voltage Supply Undervoltage/Overvoltage Enable OV/UV Overvoltage V Shutdown Threshold OV(H) OV/UV Overvoltage V Recovery Threshold OV(L) OV/UV Undervoltage ...
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LCS700-708 Parameter Symbol LLC Oscillator (cont.) I Threshold I FB Hysteresis BURST(HYST) V BT1 DT/BF Voltage to V Program Burst Setting BT2 V BT3 Time Constant for the Combination FMAX R and the Decoup- DT/BF BURST ...
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Frequency (kHz) Figure 27. V Current vs. Frequency. CC 900 800 700 600 500 400 300 200 100 0 0 100 20 300 400 Frequency ...
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LCS700-708 24 Rev. B 062011 www.powerint.com ...
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Part Ordering Information LCS 700 www.powerint.com • Hiper Product Family • LCS Series Number • Package Identifier H Plastic eSIP-16C • Pin Finish G Halogen Free and RoHS Compliant • Tape & Reel and Other Options ...
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... The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, CAPZero, SENZero, LinkZero, HiperPFS, HiperTFS, HiperLCS, 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. ...