Datasheet LT8711 (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | Micropower Synchronous Multitopology Controller with 42V Input Capability |
| Seiten / Seite | 38 / 10 — START-UP AND FAULT SEQUENCE. CHIP OFF. INITIALIZE. ACTIVE MODE. RESET … |
| Revision | A |
| Dateiformat / Größe | PDF / 1.1 Mb |
| Dokumentensprache | Englisch |
START-UP AND FAULT SEQUENCE. CHIP OFF. INITIALIZE. ACTIVE MODE. RESET DETECTED. BEGIN SWITCHING. RESET OVER. Figure 1. State Diagram
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LT8711
START-UP AND FAULT SEQUENCE
EN/FBIN < 1.0V (TYP) OR EN/FBIN > 1.0V (TYP) AND VIN AND EXTVCC < 4.5V OR VIN OR EXTVCC > 4.5V AND TJUNCTION > 165°C TJUNCTION < 160°C
CHIP OFF INITIALIZE
RESET • ALL SWITCHES OFF • SS PULLED LOW • INTVCC CHARGES UP EN/FBIN > 1.35V(TYP) AND INTVCC > 4.1V (TYP) AND BIAS–INTVEE > 3.85V (TYP) (BUCK/BUCK-BOOST/ZETA)
ACTIVE MODE RESET DETECTED
RESET • SS CHARGES UP • SS DISCHARGES QUICKLY • SWITCHER DISABLED SS < 50mV
BEGIN SWITCHING RESET OVER
• NFET BEGINS SWITCHING • PFET BEGINS SWITCHING RESET • NO RESET CONDITIONS WHEN INTVEE REGULATOR DETECTED IS OUT OF UVLO RESET = UVLO ON VIN OR EXTVCC (<4.5V MAX) UVLO ON INTVCC (<3.6V TYP) UVLO ON INTVEE (BUCK/BUCK-BOOST/ZETA) (<3.6V TYP) EN/FBIN < 1.35V (TYP) AT 1ST POWER-UP EN/FBIN < 1.00V (TYP) AFTER ACTIVE MODE SET STATUS CHANGE ON OPMODE PIN OVERTEMPERATURE (TJ > 165°C) 8711 F01
Figure 1. State Diagram
Rev A 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Start-Up and Fault Sequence Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts
START-UP AND FAULT SEQUENCE
EN/FBIN < 1.0V (TYP) OR EN/FBIN > 1.0V (TYP) AND VIN AND EXTVCC < 4.5V OR VIN OR EXTVCC > 4.5V AND TJUNCTION > 165°C TJUNCTION < 160°C
CHIP OFF INITIALIZE
RESET • ALL SWITCHES OFF • SS PULLED LOW • INTVCC CHARGES UP EN/FBIN > 1.35V(TYP) AND INTVCC > 4.1V (TYP) AND BIAS–INTVEE > 3.85V (TYP) (BUCK/BUCK-BOOST/ZETA)
ACTIVE MODE RESET DETECTED
RESET • SS CHARGES UP • SS DISCHARGES QUICKLY • SWITCHER DISABLED SS < 50mV
BEGIN SWITCHING RESET OVER
• NFET BEGINS SWITCHING • PFET BEGINS SWITCHING RESET • NO RESET CONDITIONS WHEN INTVEE REGULATOR DETECTED IS OUT OF UVLO RESET = UVLO ON VIN OR EXTVCC (<4.5V MAX) UVLO ON INTVCC (<3.6V TYP) UVLO ON INTVEE (BUCK/BUCK-BOOST/ZETA) (<3.6V TYP) EN/FBIN < 1.35V (TYP) AT 1ST POWER-UP EN/FBIN < 1.00V (TYP) AFTER ACTIVE MODE SET STATUS CHANGE ON OPMODE PIN OVERTEMPERATURE (TJ > 165°C) 8711 F01
Figure 1. State Diagram
Rev A 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Start-Up and Fault Sequence Operation Applications Information Appendix Typical Applications Package Description Typical Application Related Parts