MIC2587(2013) データシートの表示（PDF） - Micrel

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MIC2587
(Rev.:2013)

Single-Channel, Positive High-Voltage Hot Swap Controller

Micrel 

Micrel, Inc.

MIC2587/MIC2587R

Pin Description (Continued)

Pin Number

7

8

Pin Name

SENSE

VCC

Pin Function

Circuit Breaker Sense Input: This pin is the (−) Kelvin sense connection for the output supply rail.

A low-valued resistor (RSENSE) between this pin and the VCC pin sets the circuit breaker’s

current-limit trip point. When the current-limit detector circuit is enabled (as well as the current

limit0020timer), while the FB pin voltage remains higher than 1V, the voltage across the sense

resistor (VCC − VSENSE) will be regulated to VTRIP (47mV, typically) to maintain a constant current

into the load. When the FB pin voltage is less than ≅ 0.5V, the circuit breaker trip voltage

decreases linearly to 12mV (typical) when the FB pin voltage is at 0V.

To disable the circuit breaker (and defeat all current-limit protections), the SENSE pin and the

VCC pin can be tied together.

Positive Supply Voltage Input: This pin is the positive supply input to the controller and the (+)

Kelvin sense connection for the output supply rail. The nominal operating voltage range for the

MIC2587 and the MIC2587R is +10V to +80V, and VCC can withstand input transients up to

+100V. An undervoltage lockout circuit holds the GATE pin low whenever the supply voltage to

the MIC2587 and the MIC2587R is less than the VUVH threshold.

January 24, 2013

5

Revision 2.0

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