Datasheet LTC4365 (Analog Devices) - 9
| 制造商 | Analog Devices |
| 描述 | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| 页数 / 页 | 20 / 9 — operaTion. Figure 1. Operational Diagram Common to Many Portable … |
| 文件格式/大小 | PDF / 508 Kb |
| 文件语言 | 英语 |
operaTion. Figure 1. Operational Diagram Common to Many Portable Products. applicaTions inForMaTion. GATE Drive
该数据表的模型线
LTC4365
文件文字版本
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 3.5V 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 60V 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 3.5V and components are needed. Si4946 During normal operation, the LTC4365 provides up to V 60V DUAL IN VOUT 9.8V of gate enhancement to the external back-to-back 12V NOMINAL 3.5V 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 1820k driving the GATE pin above VOUT. The voltage difference UV FAULT between the GATE and V R2 OUT pins (gate drive) is a function 243k of VIN and VOUT. OV OV = 18V R1 GND UV = 3.5V 59k 4365 F02
Figure 2. LTC4365 Protects Load from –40V to 60V VIN Faults
4365fa For more information www.linear.com/LTC4365 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History 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 3.5V 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 60V 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 3.5V and components are needed. Si4946 During normal operation, the LTC4365 provides up to V 60V DUAL IN VOUT 9.8V of gate enhancement to the external back-to-back 12V NOMINAL 3.5V 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 1820k driving the GATE pin above VOUT. The voltage difference UV FAULT between the GATE and V R2 OUT pins (gate drive) is a function 243k of VIN and VOUT. OV OV = 18V R1 GND UV = 3.5V 59k 4365 F02
Figure 2. LTC4365 Protects Load from –40V to 60V VIN Faults
4365fa For more information www.linear.com/LTC4365 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts