HIP1011A データシートの表示（PDF） - Intersil

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HIP1011A

PCI Hot Plug Controller

Intersil 

HIP1011A

HIP1011A PCI Hot Plug Controller

Key Feature Description and Operation

A drop-in alternative to the widely used HIP1011, the

HIP1011A additionally features an adjustable delay time to

fault reporting and latch-off of the MOSFET switches. During

an over current condition (OC) on any output, or an under

voltage (UV) condition on the +5V, +3.3V or +12V outputs, a

LOW (0V) is presented on the FLTN output and all

MOSFETs are latched-off. A programmable delay time from

an OC or UV event to the FLTN signal going LOW and

MOSFET latch-off can be designed into the system by a

single capacitor from the FLTN pin to ground. The addition of

an increasingly larger capacitor value on the FLTN pin

increases the time from the OC or UV occurrence to the start

of the FLTN high to low transition. The capacitor also slows

the falling ramp thus delaying reaching the FLTN latch

threshold of ~2.4V. Once the FLTN latch voltage threshold is

reached the HIP1011A then simultaneously shuts down all

four supplies. This added feature enables the HIP1011A to

ignore both transient UV and OC events to the extent of a

single capacitor value in the system design. This feature also

may allow the system OS to complete housekeeping

activities in preparation for a possible unplanned shutdown

of the affected card by receiving an early warning signal from

the HIP1011A.

Customizing and Optimizing Circuit Performance

and Functionality

HOW ADJUSTABLE IS THE FAULT REPORTING DELAY

AND TIME TO POWER SUPPLY LATCH-OFF?

Figure 12 illustrates the relationship between the FLTN

signal and the gate drive outputs. Duration a, indicates the

time between FLTN starting to transition from High to Low,

3.3V INPUT

3.3V

7.6A OUT

5mΩ 1%

12V

0.5A OUT

(indicating a fault has occurred) and the start of the gate

drive outputs latching off. The latch-off is initiated by the

falling FLTN signal reaching the output latch threshold

voltage, VFLTN, TH. Table 1 illustrates the effect of the FLTN

capacitor on the response time.

TABLE 1. RESPONSE TIME TABLE

3V5VG Response a

0.001µF

0.85µs

0.1µF

37µs

10µF

3.8ms

VFLTN, TH

FLTN

a

3V5VG

T1

T2

FIGURE 12. TIMING DIAGRAM

CAN THE HIP1011A BE USED ON A CompactPCI

BOARD?

Yes, the HIP1011A can be used on a CompactPCI card

application. See Technical Brief TB358.

-12V

0.1A OUT

5V

5A OUT

5mΩ 1%

5V INPUT

-12V INPUT

12V INPUT

6.04kΩ

1%

HIP1011A

M12VIN M12VO

FLTN M12VG

3V5VG 12VG

VCC

12VIN

GND

12VO

3VISEN 5VISEN

3VS

5VS

OCSET PWRON

(SEE TABLE 1)

0.033µF

0.033µF

POWER CONTROL INPUT

NOTE:

3. All capacitors are ±±10%.

FAULT OUTPUT (ACTIVE LOW)

FIGURE 11. HIP1011A TYPICAL APPLICATION

8

0.033µF

FN4631.5

November 16, 2004

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