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EL7520A Datasheet(PDF) 9 Page - Intersil Corporation |
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EL7520A Datasheet(HTML) 9 Page - Intersil Corporation |
9 / 18 page 9 FN7318.0 July 12, 2005 EL7520, EL7520A Typical Application Applications Information The EL7520 and EL7520A provide a multiple output power supply solution for TFT-LCD applications. The system consists of a high efficiency boost controller and three low cost linear-regulator controllers (VON, VOFF, and VLOGIC). The block diagram of the whole part is shown in Figure 24. Table 1 lists the recommended components. PG VDDP CDELAY VDD VREF DRVL FBL SGND PGND DRVB FBB ISAD DRVP FBP DRVN FBN C1 C0 L1 Q1 VIN C7 C41 R43 21.7K C31 R41 VREF VLGC VOFF VREF R21 R22 R23 R12 R13 200K R11 Q21 C25 C24 D21 LX C14 C13 D12 C12 C11 D11 Q11 C23 Q2 R1 C2 VBOOST D1 VON LX LX C20 C15 ISIN DELB R0 500k Ω 1000pF C10 0.1µF 0.1µF R6 10 Ω C6 4.7µF R7 10K EN C22 0.1µF 0.1µF 500 Ω 2.5V 20K CINT 10µFx2 6.8µH C3 10µF R9 1M Ω C16 0.01µF 10µF R8 10K 62.5K R2 7.5K R20 2.2nF 0.1µF 20K R16 0.1µF 0.1µF 230K 20K 1µF 0.1µF 20V -8V 3K 104K 20K 4.7µF 0.1µF 12V C9 0.1µF 7K R42 NODE 1 0.1µF NODE 1 10µF Q3 Q31 VREF TABLE 1. RECOMMENDED COMPONENTS DESIGNATION DESCRIPTION C1, C2, C3, C31 10µF, 16V, X7R ceramic capacitor (1206) TDK C3216X7R1C106M C20 4.7µF, 16V X5R ceramic capacitor (1206) TDK C3216X5R1A475K C15 1µF, 25V X7R ceramic capacitor (1206) TDK C3216X7R1E105K D1 1A 20V low leakage schottky rectifier (CASE 457-04) ON SEMI MBRM120ET3 D11, D12, D21 200mA 30V schottky barrier diode (SOT-23) Fairchild BAT54S L1 6.8mH 1.3A inductor TDK SLF6025T-6R8M1R3-PF Q1 -2.4 -20V P-channel 1.8V specified PowerTrench MOSFET (SuperSOT-3) Fairchild FDN304P Q2 6.3A 30V single N-channel logic level PowerTrench MOSFET (SOT-23) Fairchild FDC655AN Q3 -2A –30V single P-channel logic level PowerTrench MOSFET (SuperSOT-3) Fairchild FDN360P Q11 200mA 40V PNP amplifier (SOT-23) Fairchild MMBT3906 Q21 200mA 40V NPN amplifier (SOT-23) Fairchild MMBT3904 Q31 1A 30V PNP low saturation amplifier (SOT-23) Fairchild FMMT549 TABLE 1. RECOMMENDED COMPONENTS (Continued) DESIGNATION DESCRIPTION |
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