LM3224 LM3224DC/DC DS200976-03-JP MUA08A J-40125 AN-1149 - Datasheet Archive

 

LM3224 ds200976 LM3224DC/DC 2.45A (typ) 0.15m (typ) 3.3V 8V 23V TFT ± LED LM3224

 

LM3224 LM3224 ds200976 LM3224DC/DC LM3224DC/DC 2.45A (typ) 0.15m (typ) 3.3V 8V 23V TFT ± LED LM3224 LM3224 615kHz 1.25MHz ESR LM3224 LM3224 8 MSOP 24060 20040219 615kHz/1.25MHz PWM DC/DC Clinton Jensen LM3224 LM3224 2.7V 7V 615kHz 1.25MHz 8 MSOP TFT GSM/CDMA LED 20050923 © National Semiconductor Corporation DS200976-03-JP DS200976-03-JP 1 LM3224 LM3224 615kHz/1.25MHz PWM DC/DC 2005 9 LM3224 LM3224 Top View 8-Lead Plastic MSOP NS Package Number MUA08A MUA08A 1 VC 2 FB 3 SHDN Low High 4 GND 5 SW FET GND 6 VIN 7 FSLCT 8 SS www.national.com/jpn/ VIN 1.25MHzGND 615kHz 2 LM3224 LM3224 Figure 1(b) 2 NMOS LM3224 LM3224 PWM Figure 1 Figure 1(a) 1 NMOS VC VC VC SW PMW 50 VC PWM NMOS LM3224 LM3224 IC NMOS UVP ( ) NMOS OVP ( ) PWM LM3224 LM3224 0.1 (typ) A 3 www.national.com/jpn/ LM3224 LM3224 (Note 1) ( ) VIN 7V VC 1.26V ± 0.3V SHDN 200V 7.5V (Note 6) - 40 125 150 - 65 150 2.7V 7V (Note 4) 2kV 7.5V FSLCT 220 ESD (Note 5) 21V FB 215 (15 ) 7.5V SW 300 (60 ) 20V TJ 25 J-40125 J-40125) (T VIN2.7V FSLCTSHDNVIN IL0A Note 1: Note 2: FB VIN Note 3: VC VC VC www.national.com/jpn/ 4 Note 4: TJ(MAX) TA JA PD(MAX) (TJ(MAX) - TA)/ JA Note 5: 100pF 1.5k 200pF Note 6: ( ) ( ) 100 (SQC:Statistical Quality Control) AOQL (Average Outgoing Quality Level: ) Note 7: Typ 25 Note 8: Note 9: 0 VIN "Switch Current Limit vs. VIN" Note 10: FB SHDN Pin Current vs. SHDN Pin Voltage SS Pin Current vs. Temperature FSLCT Pin Current vs. FSLCT Pin Voltage FB Pin Current vs. Temperature 5 www.national.com/jpn/ LM3224 LM3224 ( ) LM3224 LM3224 ( ) NMOS RDSON vs. Input Voltage 615kHz Non-switching IQ vs. Input Voltage 1.25MHz Non-switching IQ vs. Input Voltage 615kHz Switching IQ vs. Input Voltage 1.25MHz Switching IQ vs. Input Voltage 615kHz Switching IQ vs. Temperature www.national.com/jpn/ 6 1.25MHz Switching IQ vs. Temperature 615kHz Switching Frequency vs. Temperature 1.25MHz Switching Frequency vs. Temperature 615kHz Maximum Duty Cycle vs. Temperature 1.25MHz Maximum Duty Cycle vs. Temperature Switch Current Limit vs. VIN 7 www.national.com/jpn/ LM3224 LM3224 ( ) LM3224 LM3224 ( ) Switch Current Limit vs. Temperature Switch Current Limit vs. Temperature 1.25MHz Efficiency vs. Load Current www.national.com/jpn/ 8 LM3224 LM3224 FIGURE 1. Simplified Boost Converter Diagram (a) First Cycle of Operation (b) Second Cycle Of Operation (CCM) LM3224 LM3224 PWM ( ) 2 1 Figure 1 (a) COUT LM3224 LM3224 SS 2 Figure 1 (b) Tss = Css*1.24V/Iss 2 LM3224 LM3224 140 120 ( ) / D D D' FB FB 1.26V 9 www.national.com/jpn/ LM3224 LM3224 (CC2 RC 200k ESR ) ( ) 50 FIGURE 2. (a) Inductor current. (b) Diode current. fs D RDSON "NMOS RDSON vs. Input Voltage" 50 (D 0.5) 50 Figure 2 (a) LM3224 LM3224 PWM 2 50 (Figure 2 (a) ) 50 LM3224 LM3224 615kHz 10 1.25MHz H 4.7 H 85 2 (ILOAD/ D') iL 1 iL L i LM3224 LM3224 (VC) RC CC LM3224 LM3224 RC CC RC CC RC CC Figure 2 (b) 900k RO 5k RC 100k680pF CC 10nF www.national.com/jpn/ 10 ESR DC ESR ESR ( RESR ) ESR ESR DC 45 LM3224 LM3224 (RHP) VOUT 2iLRESR (V ) RHP 1/2 DC ADC - 20dB/dec 20dB/dec 0dB RHP 1/2 CC2 ADC 10 F RL ESR ESR ESR ESR ESR Vishay TDK (RHP : ) 20dB/dec ( ) 90 RHP RHP 1/2 RHP mc 0.072fs (in V/s) RL VIN gm RDSON "NMOS RDSON vs. Input Voltage" ILOAD RC CC RC CC 10Hz 500Hz 10 F 22 47 F F 11 www.national.com/jpn/ LM3224 LM3224 ( ) LM3224 LM3224 ( ) RC DC/DC 900k RO RC RO ZC ZC f f fP1 fP1 fP1 RL fP1 fZC LM3224 LM3224 RC CC fPC 10Hz 500Hz PD = (Tjmax - TA)/ JA Tjmax (125 )TA JA ESR ESR ESR RC CC 1 CC2 VC ESR fZ1 CC2 CIN IC IC CIN 100nF VIN COUT IC COUT RFB1 RFB2 FB AN-1149 AN-1149 fPC2 fZC 10 RC CC2 DC www.national.com/jpn/ 12 LM3224 LM3224 FIGURE 3. Triple Output TFT Bias (615 kHz operation) 23V 4 1 C4D4 2 C5D5 D1 3 C6D6 4 C7 D7 1 ON C4 8V OFF D5 2 OFF C5 VC4 VD1 - VD5 VC4 8V 8V 8V GND C5 16V 3 ON C5 16V C6 OFF C6 8V GND C6 24V 4 OFF C7 24V 3 24 - 3 × VDIODE 0.4V 22.8V TFT 3 Figure 3 TFT ± 8V 23V LM3224 LM3224 8V 8V 23V - 8V RFB1 RFB2 RC CC 615kHz 50 10 H - 8V 2 OFF D2 C1 D2 0.4V) 8V 1 ON D3 C1 C2 - 8V 13 www.national.com/jpn/ LM3224 LM3224 ( ) FIGURE 4. PWM White LED Flash/Torch Driver FIGURE 5. Continuously Operating White LED Flash/Torch Driver www.national.com/jpn/ 14 Figure 4 LED LM3224 LM3224 / Figure 4 LED RSET TABLE 1. Maximum LED Drive current (FSW=1.25MHz, L=4.7H, LED VFMAX=4V (VOUT=5.26V) ILED = VFB/RSET RSET SHDN High PWM SHDN PWM ( ) ON FET LED LED LED LED LM3224 LM3224 Table 1 LED 1 Figure 5 2 FET LED FET LED FET Some Recommended Inductors (Others May Be Used) Some Recommended Input And Output Capacitors (Others May Be Used) 15 www.national.com/jpn/ LM3224 LM3224 ( ) LM3224 LM3224 ( ) FIGURE 6. 1.25MHz, 5V Output FIGURE 7. 1.25MHz, 8V Output www.national.com/jpn/ 16 LM3224 LM3224 ( ) FIGURE 8. 1.25MHz, 12V Output FIGURE 9. 1.25MHz, 15V Output 17 www.national.com/jpn/ LM3224 LM3224 615kHz/1.25MHz PWM DC/DC inches (millimeters) ( ) (CEO) (GENERAL COUNSEL) (a) (b) National Semiconductor Copyright © 2007 National Semiconductor Corporation www.national.com 135-0042 2-17-16 / TEL.(03)5639-7300 www.national.com/jpn/