Datasheet LT3932, LT3932-1 (Analog Devices) - 12
| Fabricante | Analog Devices |
| Descripción | 36V, 2A Synchronous Step-Down LED Driver |
| Páginas / Página | 30 / 12 — BLOCK DIAGRAM |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 4.7 Mb |
| Idioma del documento | Inglés |
BLOCK DIAGRAM
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LT3932/LT3932-1
BLOCK DIAGRAM
D1 CVCC VIN C 25 24 16 17 20 21 IN V INTV V IN CC BST IN 26 INTERNAL VCC C 22nF IN REN2 EN/UVLO REGULATOR AND UVLO TOP SWITCH 27 S DRIVER REN1 R Q SYNCHRONOUS SW VREF CONTROLLER 18 1 2V REFERENCE C PEAK CURRENT 19 REF COMPARATOR BOTTOM SWITCH DRIVER DA CURRENT + – + LIMIT 8.2µH RT VOUT 10 200kHz TO 14 RT – 2MHz 4.7µF 1.4V OSCILLATOR VOUT – 10V SYNC/SPRD + REGULATOR 11 S/H S/H 50mΩ CURRENT PWMTG REGULATION 13 AMPLIFIER g PWMTG m = 200µS DRIVER 1.25V CONTROL BUFFER – + CTRL + – + – A/D PWM 28 + DETECTOR 12 + 3k 3k – INTERNAL ISMON PWM SIGNAL 7 30k 250mV 10x VOLTAGE + – ISN REGULATION AMPLIFIER 6 gm = 480µS ISP 5 + + – FB RFB2 4 1.0V INTV RFB1 950mV CC – 20µA FAULT RFAULT + 8 FAULT FAULT FAULT LOGIC LOGIC COMPARATORS 1.25µA – 200mV + GND SS VC RP 15 22 23 29 2 3 9 3923 BD RSS INTVCC CSS CC Rev B 12 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts
BLOCK DIAGRAM
D1 CVCC VIN C 25 24 16 17 20 21 IN V INTV V IN CC BST IN 26 INTERNAL VCC C 22nF IN REN2 EN/UVLO REGULATOR AND UVLO TOP SWITCH 27 S DRIVER REN1 R Q SYNCHRONOUS SW VREF CONTROLLER 18 1 2V REFERENCE C PEAK CURRENT 19 REF COMPARATOR BOTTOM SWITCH DRIVER DA CURRENT + – + LIMIT 8.2µH RT VOUT 10 200kHz TO 14 RT – 2MHz 4.7µF 1.4V OSCILLATOR VOUT – 10V SYNC/SPRD + REGULATOR 11 S/H S/H 50mΩ CURRENT PWMTG REGULATION 13 AMPLIFIER g PWMTG m = 200µS DRIVER 1.25V CONTROL BUFFER – + CTRL + – + – A/D PWM 28 + DETECTOR 12 + 3k 3k – INTERNAL ISMON PWM SIGNAL 7 30k 250mV 10x VOLTAGE + – ISN REGULATION AMPLIFIER 6 gm = 480µS ISP 5 + + – FB RFB2 4 1.0V INTV RFB1 950mV CC – 20µA FAULT RFAULT + 8 FAULT FAULT FAULT LOGIC LOGIC COMPARATORS 1.25µA – 200mV + GND SS VC RP 15 22 23 29 2 3 9 3923 BD RSS INTVCC CSS CC Rev B 12 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts