LM1577/LM2577 シリーズSIMPLE SWITCHER® 昇圧型電圧レギュレータ

Transcription

1 LM1577,LM2577 LM1577/LM2577 SIMPLE SWITCHER Step-Up Voltage Regulator Literature Number: JAJS780

2 LM2577 SIMPLE SWITCHER LM2577 ( ) / 12V 15V ADJ 3.0A NPN 52kHz Straight Leads 5-Lead TO-220 (T) SIMPLE SWITCHER TM LM2577 SIMPLE SWITCHER TM LM ds Converted to nat2000 DTD re-release for the book because migration failed to create assembly. CN Remove "Series" in the prescriptive title and put it in prod.name.title. CN Insert Trademark for SIMPLE SWITCHER. CN V 3A NPN 3.5V 40V ( ) Bent, Staggered Leads 5-Lead TO-220 (T) LM2577 LM2577 SIMPLE SWITCHER Top View Order Number LM2577T-12, LM2577T-15, or LM2577T-ADJ See NS Package Number T05A Top View Order Number LM2577T-12 Flow LB03, LM2577T-15 Flow LB03, or LM2577T-ADJ Flow LB03 See NS Package Number T05D SIMPLE SWITCHER National Semiconductor Corporation DS JP 1

3 LM2577 ( ) 16-Lead DIP (N) 24-Lead Surface Mount (M) *No internal Connection Top View Order Number LM2577N-12, LM2577N-15, or LM2577N-ADJ See NS Package Number N16A *No internal Connection Top View Order Number LM2577M-12, LM2577M-15, or LM2577M-ADJ See NS Package Number M24B TO-263 (S) 5-Lead Surface-Mount Package Top View Side View Order Number LM2577S-12, LM2577S-15, or LM2577S-ADJ See NS Package Number TS5B 2

4 LM2577 Note: TO-220(T) 3

5 LM2577 (Note 1) 45V 65V (Note 2) 6.0A ( 10 ) ESD (C 100 pf R 1.5 k ) 2 kv (Notes 10) 3.5V V IN 40V 0V V SWITCH 60V I SWITCH 3.0A 40 T J 125 LM T J 25 V IN 5V I SWITCH 0 4

6 LM ( ) T J 25 V IN 5V I SWITCH 0 LM2577 LM T J 25 V IN 5V I SWITCH 0 5

7 LM2577 LM ( ) T J 25 V IN 5V I SWITCH 0 6

8 LM ( ) T J 25 V IN 5V V FEEDBACK V REF I SWITCH 0 LM2577 LM2577-ADJ T J 25 V IN 5V V FEEDBACK V REF I SWITCH 0 7

9 LM2577 LM2577-ADJ ( ) T J 25 V IN 5V V FEEDBACK V REF I SWITCH 0 Note 1: Note 2: IC IC IC LM2577 IC IC IC 6A Note 3: ( ) Note 4: ( ) Note 5: ( ) ( ) 100 (SQC) Note 6: LM2577 Figure 1 3 Note 7: 1.0M A VOL COMP ( ) 10M A VOL 2 8

10 LM2577-ADJ ( ) Note 8: Note 9: 1 Switchers Made Simple TO-263 PC 0.5 JA 50 /W 1 JA 37 /W 1.6 JA 32 /W LM2577 Note 10: LM V LM V LM2577-ADJ 2.5V Reference Voltage vs Temperature Reference Voltage vs Temperature Reference Voltage vs Supply Voltage Reference Voltage vs Temperature Reference Voltage vs Supply Voltage Reference Voltage vs Supply Voltage 9

11 LM2577 ( ) Error Amp Transconductance vs Temperature Error Amp Transconductance vs Temperature Error Amp Transconductance vs Temperature Error Amp Voltage Gain vs Temperature Error Amp Voltage Gain vs Temperature Error Amp Voltage Gain vs Temperature 10

12 ( ) Quiescent Current vs Temperature Quiescent Current vs Switch Current LM2577 Current Limit vs Temperature Current Limit Response Time vs Overdrive Switch Saturation Voltage Switch Current Switch Transconductance Temperature 11

13 LM2577 ( ) Feedback Pin Bias Current vs Temperature Oscillator Frequency vs Temperature Maximum Power Dissipation (TO-263) (Note 9) 12

14 LM LM2577 L (AIE) D any manufacturer C OUT Sprague Type 673D Electrolytic 680 F, 20V Note: TO-220(T) FIGURE 1. Circuit Used to Specify System Parameters for 12V Versions LM L (AIE) D any manufacturer COUT Sprague Type 673D Electrolytic 680 F, 20V Note: TO-220(T) FIGURE 2. Circuit Used to Specify System Parameters for 15V Versions 13

15 LM2577 LM2577-ADJ L (AIE) D any manufacturer C OUT Sprague Type 673D Electrolytic 680 F, 20V R1 48.7k in series with 511 (1 ) R2 5.62k (1 ) Note: TO-220(T) FIGURE 3. Circuit Used to Specify System Parameters for ADJ Versions Note: TO-220(T) * 12V 15V LM2577 FIGURE 4. LM2577 Block Diagram and Boost Regulator Application 14

16 ( ) ( ) Figure 4 LM2577-ADJ LM LM V 15V LM kHz / (L) NPN V IN /L (V OUT V IN )/L (D) (C OUT ) 1.230V ( ) 2 Figure 5 Figure 6 V F Forward Biased Diode Voltage I LOAD Output Load Current FIGURE6. Step-Up Regulator Formulas LM2577 Figure 4 : V IN(min) V OUT I LOAD (max) LM2577 V IN V OUT I LOAD(max) V OUT I LOAD(max) V OUT 60V FIGURE 5. Step-Up Regulator Waveforms V OUT 10 V IN(min) 15

17 LM2577 ( ) 1. (L) A V 15V Figure 7 (12V ) Figure 8 (15V ) V IN(min) I LOAD(max) LM2577 LM V C 2. ADJ 3 D (max) : (0 D 0.9) 1. L MIN 2. E T L H E T L H H V F 0.5V 0.8V( ) E T: FIGURE 7. LM Inductor Selection Guide I IND,DC : B. 1. Figure 9 E T I IND,DC ( : ) L H E T 90V s (L) 250V s (H) 2. D 0.85 C D 0.85 FIGURE 8. LM Inductor Selection Guide B1 L MIN C B1 16

18 ( ) LM2577 Note: ( ) C. Figure 10 3 AIE : (EMI) ( ) E T Pulse : EMI E T Renco : E T EMI FIGURE 9. LM2577-ADJ Inductor Selection Graph 17

19 LM2577 ( ) C. C C 90 C C 0.22 F Figure 11 (WVDC) : 20 Schott Corp., (612) Parkers Lake Rd., Wayzata, MN Pulse Engineering, (619) P.O. Box 12235, San Diego, CA Renco Electronics Inc., (516) Jeffryn Blvd. East, Deer Park, NY FIGURE 10. Table of Standardized Inductors and Manufacturer's Part Numbers 2. (R C C C ) (C OUT ) R C C C R C C C I LOAD(max) L C OUT R C C C C OUT R C C C (I LOAD V OUT ) (Figure 15 ) A. R C : RMS 52kHz 50 (ESR) : R C C C C C R C ESR 3k B. 2 C OUT ESR 52kHz Hz ESR 20 ESR 2 ESR (C 470 F) WVDC

20 ( ) 3. (R1 R2) LM2577-ADJ LM LM LM2577-ADJ V OUT 1.23V (1 R1/R2) R1 R2 LM2577-ADJ 1.23V V OUT R1 R2 5. (D) LM2577 I LOAD(max) I D(PK) ( ) 1A 3A Figure 12 LM (C IN ) LM2577 ESR 0.1 F Cornell Dublier Types 239, 250, 251, UFT, 300, or 350 P.O. Box 128, Pickens, SC (803) Nichicon Types PF, PX, or PZ 927 East Parkway, Schaumburg, IL (708) Sprague Types 672D, 673D, or 674D Box 1, Sprague Road, Lansing, NC (919) United Chemi-Con Types LX, SXF, or SXJ 9801 West Higgins Road, Rosemont, IL (708) FIGURE 11. Aluminum Electrolytic Capacitors Recommended for Switching Regulators LM2577 ( 4 F) FIGURE 12. Diode Selection Chart TO-263 PCB * PD GND LM2577 (Figure 13 ) Figure 14 Figure 15 LM2577 Figure

21 LM2577 ( ) Note: TO-220(T) FIGURE 13. Step-up Regulator Delivers 12V from a 5V Input FIGURE 14. Line Regulation (Typical) of Step-Up Regulator of Figure 13 A: Output Voltage Change, 100 mv/div. (AC-coupled) B: Load current, 0.2 A/div Horizontal: 5 ms/div FIGURE 15. Load Transient Response of Step-Up Regulator of Figure 13 A: Switch pin voltage, 10 V/div B: Switch pin current, 2 A/div C: Inductor current, 2 A/div D: Output ripple voltage, 100 mv/div (AC-coupled) Horizontal: 5 s/div FIGURE 16. Switching Waveforms of Step-Up Regulator of Figure

22 ( ) ( )1 Figure ( ) Figure 17 Figure 19 A. R C I LOAD(max) 2 3k B. C OUT (2 C OUT ) LM V 15V (Figure 18 ) Figure (C C R C ) (C OUT ) C C R C C OUT ( ) I LOAD(max) I LOAD(max) 2 FIGURE 17. Flyback Regulator Waveforms 21

23 LM2577 ( ) T1 Pulse Engineering, PE D1, D2 1N5821 FIGURE 18. LM2577-ADJ Flyback Regulator with Outputs 22

24 ( ) LM2577 FIGURE 19. Flyback Regulator Formulas C. C C R1 R2 LM2577-ADJ 1.23V V OUT R1 R2 D. V OUT V OUT ESR 4. ESR C OUT Figure LM2577-ADJ LM LM LM2577-ADJ V OUT 1.23V (1 R1/R2) 23

25 LM2577 ( ) 5. LM2577 V IN V IN ESR 1.0 F ( ) V CLAMP FIGURE 21. Snubber Circuit FIGURE 20. Flyback Transformer Selection Guide (47 F ) 6. 10V L P 200 H 65V Figure 21 RC V SW(OFF) 5V 10V (V CLAMP ) R C Figure 22 5V 15V ( 225mA) Figure 23 Figure 25 Figure 24 Figure 26 Figure

26 ( ) LM2577 T1 Pulse Engineering, PE D1, D2 1N5821 FIGURE 22. Flyback Regulator Easily Provides Dual Outputs A: Output Voltage Change, 100 mv/div B: Output Current, 100 ma/div Horizontal: 10 ms/div FIGURE 23. Line Regulation (Typical) of Flyback Regulator of Figure 22, 15V Output FIGURE 24. Load Transient Response of Flyback Regulator of Figure 22, 15V Output 25

27 LM2577 ( ) A: Output Voltage Change, 100 mv/div B: Output Current, 100 ma/div Horizontal: 10 ms/div FIGURE 25. Line Regulation (Typical) of Flyback Regulator of Figure 22, 15V Output FIGURE 26. Load Transient Response of Flyback Regulator of Figure 22, 15V Output A: Switch pin voltage, 20 V/div B: Primary current, 2 A/div C: 15V Secondary current, 1 A/div D: 15V Output ripple voltage, 100 mv/div Horizontal: 5 s/div FIGURE 27. Switching Waveforms of Flyback Regulator of Figure 22, Each Output Loaded with 60 RC LM2577 Figure 28 R IN C IN 40 sec FIGURE 28. Input Line Filter 26

28 inches (millimeters) LM Wide SO Package (M) Order Number LM2577M-12, LM2577M-15 or LM2577M-ADJ NS Package Number M24B 27

29 LM2577 inches (millimeters) ( ) Molded Dual-In-Line Package (N) Order Number LM2577N-12, LM2577N-15, or LM2577N-ADJ NS Package Number N16A TO-220, Straight Leads (T) Order Number LM2577T-12, LM2577T-15, or LM2577T-ADJ NS Package Number TO5A 28

30 inches (millimeters) ( ) LM2577 TO-220, Bent Staggered Leads (T) Order Number LM2577T-12 Flow LB03, LM2577T-15 Flow LB03, or LM2577T-ADJ Flow LB03 NS Package Number T05D 29

31 LM2577 SIMPLE SWITCHER inches (millimeters) ( ) 5-Lead TO-263 (S) Order Number LM2577S-12, LM2577S-15 or LM2577S-ADJ NS Package Number TS5B (CEO) (GENERAL COUNSEL) a (b) National Semiconductor Copyright 2005 National Semiconductor Corporation / TEL.(03)

32 IMPORTANT NOTICE