Datasheet LTC4365 (Analog Devices) - 8
| Fabricante | Analog Devices |
| Descripción | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Páginas / Página | 20 / 8 — BLOCK DIAGRAM. OPERATION |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 1.1 Mb |
| Idioma del documento | Inglés |
BLOCK DIAGRAM. OPERATION
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Versión de texto del documento
link to page 9 LTC4365
BLOCK DIAGRAM
V REVERSE IN –40V TO 60V PROTECTION GATE – + 5V INTERNAL CLOSES SWITCH SUPPLY WHEN VIN IS NEGATIVE LDO 6.5V INTERNAL SUPPLY GATE IGATE VOUT CHARGE PUMP ENABLE f = 400kHz 2.2V FAULT TURN UVLO DELAY TIMERS OFF OFF SHDN SHDN UV LOGIC – + 50mA 90µA FAULT 25mV OV HYSTERESIS GATE PULLDOWN + – 0.5V GND 4365 BD
OPERATION
Many of today’s electronic systems get their power from directly to the electronic systems, the systems could be external sources such as wall wart adapters, batteries and subject to damage. The LTC4365 is an input voltage fault custom power supplies. A typical supply arrangement for protection N-channel MOSFET controller. The part isolates a portable product is shown by the operational diagram an input supply from its load to protect the load from in Figure 1. Power is supplied by an AC adaptor or, if the unexpected supply voltage conditions, while providing a plug is withdrawn, by a removable battery. Trouble arises low loss path for qualified power. when any of the following occurs: To protect electronic systems from improperly connected • The battery is installed backwards power supplies, system designers will often add discrete • An AC adaptor of opposite polarity is attached diodes, transistors and high voltage comparators. The high voltage comparators enable system power only if the input • An AC adaptor of excessive voltage is attached supply falls within a desired voltage window. A Schottky • The battery is discharged below a safe level diode or P-channel MOSFET typically added in series with the supply protects against reverse supply connections. This can lead to supply voltages that are too high, too low, or even negative. If these power sources are applied The LTC4365 provides accurate overvoltage and under- voltage comparators to ensure that power is applied to Rev. B 8 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 Operation Applications Information Package Description Revision History Typical Application Related Parts
BLOCK DIAGRAM
V REVERSE IN –40V TO 60V PROTECTION GATE – + 5V INTERNAL CLOSES SWITCH SUPPLY WHEN VIN IS NEGATIVE LDO 6.5V INTERNAL SUPPLY GATE IGATE VOUT CHARGE PUMP ENABLE f = 400kHz 2.2V FAULT TURN UVLO DELAY TIMERS OFF OFF SHDN SHDN UV LOGIC – + 50mA 90µA FAULT 25mV OV HYSTERESIS GATE PULLDOWN + – 0.5V GND 4365 BD
OPERATION
Many of today’s electronic systems get their power from directly to the electronic systems, the systems could be external sources such as wall wart adapters, batteries and subject to damage. The LTC4365 is an input voltage fault custom power supplies. A typical supply arrangement for protection N-channel MOSFET controller. The part isolates a portable product is shown by the operational diagram an input supply from its load to protect the load from in Figure 1. Power is supplied by an AC adaptor or, if the unexpected supply voltage conditions, while providing a plug is withdrawn, by a removable battery. Trouble arises low loss path for qualified power. when any of the following occurs: To protect electronic systems from improperly connected • The battery is installed backwards power supplies, system designers will often add discrete • An AC adaptor of opposite polarity is attached diodes, transistors and high voltage comparators. The high voltage comparators enable system power only if the input • An AC adaptor of excessive voltage is attached supply falls within a desired voltage window. A Schottky • The battery is discharged below a safe level diode or P-channel MOSFET typically added in series with the supply protects against reverse supply connections. This can lead to supply voltages that are too high, too low, or even negative. If these power sources are applied The LTC4365 provides accurate overvoltage and under- voltage comparators to ensure that power is applied to Rev. B 8 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 Operation Applications Information Package Description Revision History Typical Application Related Parts