HIP1011ACB datasheet(8/11 Pages) RENESAS

8 / 11 page

HIP1011A

FN4631 Rev 5.00

Page 8 of 11

November 16, 2004

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,

(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.

CAN THE HIP1011A BE USED ON A CompactPCI

BOARD?

Yes, the HIP1011A can be used on a CompactPCI card

application. See Technical Brief TB358.

NOTE:

3. All capacitors are ±

10%.

FIGURE 11. HIP1011A TYPICAL APPLICATION

12V

M12VIN

FLTN

3V5VG

VCC

12VIN

3VISEN

3VS

OCSET

M12VO

12VG

GND

12VO

5VISEN

5VS

PWRON

M12VG

HIP1011A

3.3V

12V INPUT

-12V

5V INPUT

-12V INPUT

POWER CONTROL INPUT

0.033

F

0.033

F

6.04k



FAULT OUTPUT (ACTIVE LOW)

(SEE TABLE 1)

 1%

0.033

F

3.3V INPUT

 1%

7.6A OUT

0.5A OUT

0.1A OUT

5A OUT

TABLE 1. RESPONSE TIME TABLE

0.001

F0.1F10F

3V5VG Response

0.85

s37s3.8ms

3V5VG

FLTN

FIGURE 12. TIMING DIAGRAM

VFLTN, TH

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