Datasheet LTC4365 (Analog Devices) - 9
| Hersteller | Analog Devices |
| Beschreibung | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Seiten / Seite | 20 / 9 — OPERATION. Figure 1. Operational Diagram Common to Many Portable … |
| Revision | B |
| Dateiformat / Größe | PDF / 1.1 Mb |
| Dokumentensprache | Englisch |
OPERATION. Figure 1. Operational Diagram Common to Many Portable Products. APPLICATIONS INFORMATION. GATE Drive
Modelllinie für dieses Datenblatt
- LTC4365CDDB#TRMPBF LTC4365CDDB#TRPBF LTC4365CDDB-1#TRMPBF LTC4365CDDB-1#TRPBF LTC4365CTS8#TRMPBF LTC4365CTS8#TRPBF LTC4365CTS8-1#TRMPBF LTC4365CTS8-1#TRPBF LTC4365HDDB#TRMPBF LTC4365HDDB#TRPBF LTC4365HDDB-1#TRMPBF LTC4365HDDB-1#TRPBF LTC4365HTS8#TRMPBF LTC4365HTS8#TRPBF LTC4365HTS8#WTRMPBF LTC4365HTS8#WTRPBF LTC4365HTS8-1#TRMPBF LTC4365HTS8-1#TRPBF LTC4365HTS8-1#WTRMPBF LTC4365HTS8-1#WTRPBF LTC4365IDDB#TRMPBF LTC4365IDDB#TRPBF LTC4365IDDB-1#TRMPBF LTC4365IDDB-1#TRPBF LTC4365ITS8#TRMPBF LTC4365ITS8#TRPBF LTC4365ITS8#WTRMPBF LTC4365ITS8#WTRPBF LTC4365ITS8-1#TRMPBF LTC4365ITS8-1#TRPBF LTC4365ITS8-1#WTRMPBF LTC4365ITS8-1#WTRPBF
Textversion des Dokuments
link to page 9 link to page 9 LTC4365
OPERATION
the system only if the input supply meets the user select- enhances the gate of external N-channel power MOSFETs. able voltage window. Reverse supply protection circuits Power consumption is 10µA during shutdown and 125µA automatically isolate the load from negative input voltages. while operating. The LTC4365 integrates all these func- During normal operation, a high voltage charge pump tions in tiny TSOT-23 and 3mm × 2mm DFN packages. –40V TO 60V PROTECTION RANGE M1 M2
+
AC ADAPTOR LOAD INPUT CIRCUIT
–
GATE BATTERY VIN VOUT LTC4365 R5 SHDN R3 UV FAULT OV, UV PROTECTION THRESHOLDS SET TO R2 SATISFY LOAD CIRCUIT OV 2.5V TO 34V R1 GND OPERATING RANGE 4365 F01
Figure 1. Operational Diagram Common to Many Portable Products APPLICATIONS INFORMATION
The LTC4365 is an N-channel MOSFET controller that 18V. Voltages at VIN outside of the 5V to 18V range are protects a load from faulty supply connections. A basic prevented from getting to the load and can be as high as application circuit using the LTC4365 is shown in Figure 2 40V and as low as –40V. The circuit of Figure 2 protects The circuit provides a low loss connection from VIN to against negative voltages at VIN as shown. No other external VOUT as long as the voltage at VIN is between 5V and components are needed. SiSB46DN During normal operation, the LTC4365 provides up to V 40V DUAL IN VOUT 9.8V of gate enhancement to the external back-to-back 12V NOMINAL 5V TO 18V M1 M2 + N-channel MOSFETs. This turns on the MOSFET, thus COUT 100µF connecting the load at VOUT to the supply at VIN. GATE VIN VOUT R5 LTC4365
GATE Drive
100k SHDN The LTC4365 turns on the external N-channel MOSFETs by R3 2740k driving the GATE pin above VOUT. The voltage difference UV FAULT between the GATE and V R2 OUT pins (gate drive) is a function 215k of VIN and VOUT. OV OV = 18V R1 GND UV = 5V 84.5k 4365 F02
Figure 2. LTC4365 Protects Load from –40V to 40V VIN Faults
Rev. B For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
OPERATION
the system only if the input supply meets the user select- enhances the gate of external N-channel power MOSFETs. able voltage window. Reverse supply protection circuits Power consumption is 10µA during shutdown and 125µA automatically isolate the load from negative input voltages. while operating. The LTC4365 integrates all these func- During normal operation, a high voltage charge pump tions in tiny TSOT-23 and 3mm × 2mm DFN packages. –40V TO 60V PROTECTION RANGE M1 M2
+
AC ADAPTOR LOAD INPUT CIRCUIT
–
GATE BATTERY VIN VOUT LTC4365 R5 SHDN R3 UV FAULT OV, UV PROTECTION THRESHOLDS SET TO R2 SATISFY LOAD CIRCUIT OV 2.5V TO 34V R1 GND OPERATING RANGE 4365 F01
Figure 1. Operational Diagram Common to Many Portable Products APPLICATIONS INFORMATION
The LTC4365 is an N-channel MOSFET controller that 18V. Voltages at VIN outside of the 5V to 18V range are protects a load from faulty supply connections. A basic prevented from getting to the load and can be as high as application circuit using the LTC4365 is shown in Figure 2 40V and as low as –40V. The circuit of Figure 2 protects The circuit provides a low loss connection from VIN to against negative voltages at VIN as shown. No other external VOUT as long as the voltage at VIN is between 5V and components are needed. SiSB46DN During normal operation, the LTC4365 provides up to V 40V DUAL IN VOUT 9.8V of gate enhancement to the external back-to-back 12V NOMINAL 5V TO 18V M1 M2 + N-channel MOSFETs. This turns on the MOSFET, thus COUT 100µF connecting the load at VOUT to the supply at VIN. GATE VIN VOUT R5 LTC4365
GATE Drive
100k SHDN The LTC4365 turns on the external N-channel MOSFETs by R3 2740k driving the GATE pin above VOUT. The voltage difference UV FAULT between the GATE and V R2 OUT pins (gate drive) is a function 215k of VIN and VOUT. OV OV = 18V R1 GND UV = 5V 84.5k 4365 F02
Figure 2. LTC4365 Protects Load from –40V to 40V VIN Faults
Rev. B For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts