LT1641-2CS8 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LT1641-2CS8

Positive High Voltage Hot Swap Controllers

Linear Technology 

1 2 3 4 5 6 7 8 9 10 Next

LT1641-1/LT1641-2

APPLICATIO S I FOR ATIO

Figure 9. Short-Circuit Waveforms

VIN

24V

SHORT

PIN

R1

49.9k

1%

R2

3.4k

1%

GND

RS

Q1

0.025Ω IRF530

D2

30V

1N5256B

8

VCC

1

ON

D1

R5

CMPZ

10Ω

5248B

5%

C1

R6, 10nF

1k, 5%

76

SENSE GATE

2

FB

LT1641-1

TIMER

GND

5

4

C2

0.68µF

3

PWRGD

+

VOUT

R3

CL

59k

1%

R7

24k

5%

R4

3.57k

1%

PWRGD

1641-1 F10

Figure 10. Overvoltage Detection

Figure 11. Overvoltage Waveforms

GATE Pin Voltage

A curve of gate drive vs VCC is shown in Figure 13. The

GATE pin is clamped to a maximum voltage of 18V above

the input voltage. At minimum input supply voltage of 9V,

the minimum gate drive voltage is 4.5V. When the input

10

supply voltage is higher than 20V, the gate drive voltage is

at least 10V and a regular N-FET can be used. In applica-

tions over a 9V to 24V range, a logic level N-FET must be

used with a proper protection Zener diode between its gate

and source (as D1 shown is Figure 5).

164112fc

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