Linear Technology LTC 4362 Скачать руководство пользователя страница 1

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dc1575bfa

DEMO MANUAL DC1575B

DESCRIPTION

LTC4362-2:  

Monolithic Overvoltage/

Overcurrent Protector

Demonstration circuit 1575B features the 

LTC

®

4362

, a 

monolithic overvoltage/overcurrent protector that safe-

guards 2.5V to 5.5V systems from power supply over-

voltage. It is designed for portable devices with multiple 

power supply options including wall adaptors, car battery 

adaptors and USB ports.
The LTC4362 controls an internal 40mΩ N-channel MOSFET 

in series with the input power supply. During overvoltage 

transients, the LTC4362 turns off the MOSFET within 1μs, 

isolating downstream components from the input supply. 

In most applications, the LTC4362 rides through induc-

tive cable transients without requiring transient voltage 

suppressors or other external components. An internal 

current sense resistor is used to implement overcurrent 

protection.
The LTC4362 has a delayed start-up at plug-in and con-

trolled dV/dt ramp-up for inrush current limiting. A 

PWRGD

 

pin provides power good monitoring for V

IN

. The LTC4362

PARAMETER

CONDITION

VALUE

Input Voltage

JP2: OV/OC 

JP2: OV/OC/NV

0V to 28V 

–30V to 28V

Output Voltage

Input Range for Gate Turn-On

2.1V to 5.8V

Overcurrent Threshold

Internal Sense Resistor

1.5A

Overcurrent Retry

LTC4362-2

Auto-Retry

PERFORMANCE SUMMARY

features a soft-shutdown controlled by the ON pin and 

drives an optional external P-channel MOSFET for negative 

voltage protection. Following an overvoltage condition, 

the LTC4362 automatically restarts with a 130ms delay. 

After an overcurrent fault, the LTC4362-1 remains off while 

the LTC4362-2 (featured on the DC1575B) automatically 

restarts after a 130ms delay.
DC1575B demonstrates two protection schemes selected 

with a jumper. The first selection is overvoltage and 

overcurrent protection. The second selection is overvolt-

age, overcurrent, and negative voltage protection. Also 

on the DC1575B is ON control with another jumper, input 

LEDs indicating positive or negative input voltage, output 

LED and connection for USB protected output.

Design files for this circuit board are available at  

http://www.linear.com/demo/DC1575B

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear 

Technology Corporation. All other trademarks are the property of their respective owners.

(T

A

 = 25°C)

Содержание LTC 4362

Страница 1: ...LUE Input Voltage JP2 OV OC JP2 OV OC NV 0V to 28V 30V to 28V Output Voltage Input Range for Gate Turn On 2 1V to 5 8V Overcurrent Threshold Internal Sense Resistor 1 5A Overcurrent Retry LTC4362 2 Au...

Страница 2: ...ect OV OC QUICK START PROCEDURE b For overvoltage overcurrent and negative voltage protection select OV OC NV 3 Select ENABLE at JP1 to enable the protection 4 Connect a power supply across VIN and GN...

Страница 3: ...OSFET back on An orange input LED indicates if the input supply is on while a green OUT LED indicates the gate is on and input is connected to the output Protection OV OC NV ThesecondselectionatJP2isO...

Страница 4: ...stpoint 0 094 Mill Max 2501 2 00 80 00 00 07 0 8 2 JP1 JP2 Headers Single Row 3 Pins 2mm Ctrs Samtec TMM 103 02 L S 9 1 J1 USB Connection Type B USB Mill Max 897 43 004 90 000000 10 1 J2 USB Connectio...

Страница 5: ...USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 1 1 SIZE MODIFY DATE IC NO REV SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT...

Страница 6: ...NCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR...

Страница 7: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Analog Devices Inc DC1575B...

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