el7586a Intersil Corporation, el7586a Datasheet
el7586a
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el7586a Summary of contents
Page 1
... OFF converter can be programmed to operate in either P-mode or PI-mode for improved load regulation. Both EL7586 and EL7586A also integrate fault protection for all four channels. Once a fault is detected, the device is latched off until the input supply cycled. EL7586 also features an integrated start-up sequence for ...
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... BOOST ∆V / Load Regulation - “PI” Mode BOOST ∆I BOOST V CINT Pl Mode Select Threshold CINT_T 2 EL7586, EL7586A = 25°C) V DRVL Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Maximum Continuous Junction Temperature . . . . . . . . . . . . 125° ...
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... Turn On Delay ON t Soft-start Time SS t Delay Between A and V DEL1 VDD t Delay Between V and V DEL2 ON I DELB Pull-down Current DELB C Delay Capacitor DEL 3 EL7586, EL7586A = 11V 200mA 15V, V BOOST LOAD ON CONDITION I = 0.2mA 25°C DRVP 0.2mA DRVP V falling FBP V = 1.35V FBP ...
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... FBN 12, 13 PGND 14 VREF 15 CINT 16 FBB VDD EL7586, EL7586A = 11V 200mA 15V, V BOOST LOAD ON CONDITION C = 0.22µF DLY VPG > 0.6V VPG < 0. capacitor connected from this pin to GND sets the delay time for start-up sequence and sets the fault ...
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... EFFICIENCY AT V BOOST 0 -0.1 -0.2 -0.3 A VDD -0.4 -0.5 A =12V VDD -0.6 -0.7 0 100 200 I (mA) OUT FIGURE 5. V LOAD REGULATION AT V BOOST 5 EL7586, EL7586A A =9V VDD A =12V VDD 300 400 FIGURE (PI MODE =9V VDD A =12V VDD 400 500 = 3V (P MODE) FIGURE =9V VDD ...
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... V (V) IN FIGURE 9. V LINE REGULATION (PI MODE) BOOST 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0 (mA) OUT FIGURE 11. V LOAD REGULATION ON 6 EL7586, EL7586A (Continued) =9V VDD =12V 400 500 FIGURE MODE) IN 5.0 5.5 6 =9V VDD -3 A =12V VDD -4 A =15V VDD -5 0 200 ...
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... DLY V CDLY EN V BOOST V LOGIC C =220nF DLY TIME (10ms/DIV) FIGURE 14. EL7586 START-UP SEQUENCE BOOST V LOGIC V OFF =220nF DLY TIME (10ms/DIV) FIGURE 16. EL7586 START-UP SEQUENCE V CDLY V REF BOOST V LOGIC C =220nF DLY TIME (10ms/DIV) FIGURE 18. EL7586A START-UP SEQUENCE FN9210.2 January 17, 2006 ...
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... Typical Performance Curves V BOOST V LOGIC V OFF C =220nF V DLY ON TIME (10ms/DIV) FIGURE 19. EL7586A START-UP SEQUENCE V = =13V OUT I =30mA OUT TIME (400ns/DIV) FIGURE 21. LX WAVEFORM - DISCONTINUOUS MODE JEDEC JESD51-3 AND SEMI G42-88 (SINGLE LAYER) TEST BOARD 0.8 667mW 0.7 0.6 0.5 0.4 0.3 0.2 0 AMBIENT TEMPERATURE (°C) FIGURE 23 ...
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... Applications Information The EL7586 and EL7586A provide a high integrated multiple output power solution for TFT-LCD applications. The system consists of one high efficiency boost converter and three linear-regulator controllers ( OFF multiple protection functions. A block diagram is shown in Figure 25. Table 1 lists the recommended components. ...
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... INT UVLO EN COMPARATOR V DD SHUTDOWN PG & START-UP CONTROL THERMAL SHUTDOWN CDLY SS + DRVN 0.2V - BUFFER FBN 0.4V UVLO COMPARATOR FIGURE 25. BLOCK DIAGRAM 10 EL7586, EL7586A OSCILLATOR COMP OSC PWM Σ LOGIC BUFFER CONTROLLER CURRENT AMPLIFIER CURRENT REF CURRENT LIMIT COMPARATOR + V REF - UVLO COMPARATOR REF - ...
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... EL7586, EL7586A SLOPE COMPENSATION Ifb CURRENT AMPLIFIER Iref FBB GM AMPLIFIER REFERENCE GENERATOR CINT FIGURE 26. BLOCK DIAGRAM OF THE BOOST REGULATOR 11 SHUTDOWN & STARTUP CONTROL CLOCK PWM LOGIC BUFFER Ifb Iref VOLTAGE AMPLIFIER PGND LX FN9210.2 January 17, 2006 ...
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... OMAX (EL7586, EL7586A) value, measured at zero volts. 0.490686 Compensation 0.307353 The EL7586, and EL7586A can operate in either P mode or PI mode. Connecting the C 0.197353 P mode; For better load regulation, use PI mode with a 0.743464 4.7nF capacitor in series with a 10K resistor between C 0.465686 and ground ...
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... IN and VDD FIGURE 27. CASCADED MOSFET TOPOLOGY FOR HIGH voltage Linear-Regulator Controllers ( OFF The EL7586 and EL7586A include three independent linear- regulator controllers, in which two are positive output voltage (V ON and V applications circuits are shown in Figures 28, 29, and 30 respectively Calculation of the Linear Regulator Base-Emitter ...
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... For the EL7586 and EL7586A, the minimum drive current is: I_DRVL_min = 8mA The minimum base-emitter resistor, R calculated as: R _min = V _max/(I_DRVL_min - Ic/Hfe_min 1.25V/(8mA - 500mA/100) = 417Ω This is the minimum value that can be used - so, we now choose a convenient value greater than this minimum value; ...
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... Typical V voltage supported by EL7586 LOGIC and EL7586A ranges from +1. comparator is also included for monitoring the output voltage. The undervoltage threshold is set at 25% below the 1.2V reference. Set-Up Output Voltage Refer to the Typical Application Diagram, the output voltages ...
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... EL7586, EL7586A For the EL7586, V beginning of the third ramp. The soft-start ramp depends on the value of the C soft-start time is ~2ms. ) The EL7586A is the same as the EL7586 except V V LOGIC )/A VDD When a fault is detected, the outputs and the input protection = will turn off but V ...
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... EL7586, EL7586A V CDLY EN V REF V BOOST LOGIC V OFF t DEL1 DELAYED V BOOST V ON START-UP SEQUENCE TIMED BY C FIGURE 33. EL7586 START-UP SEQUENCE DEL2 DLY FN9210.2 January 17, 2006 ...
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... EL7586, EL7586A V CDLY REF V BOOST LOGIC V OFF t DEL1 DELAYED V BOOST V ON START-UP SEQUENCE TIMED BY C FIGURE 34. EL7586A START-UP SEQUENCE DEL2 t DEL3 DLY FN9210.2 January 17, 2006 ...
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... LX node as possible. Demo Board Layout FIGURE 35. TOP LAYER 19 EL7586, EL7586A 5. The power ground (PGND) and signal ground (SGND) pins should be connected at only one point near the main decoupling capacitors. 6. The exposed die plate, on the underneath of the package, should be soldered to an equivalent area of metal on the PCB ...
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... LOGIC (2.5V 5.4kΩ 31 5kΩ 4.7µF * NOTE: The SGND should be connected to the exposed die plate and connectd to the PGND at one point only. 20 EL7586, EL7586A 6.8µH 46.5kΩ 5kΩ CDELAY FBB DELB VDD ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 21 EL7586, EL7586A FN9210.2 January 17, 2006 ...