HIP1011BCB-T【PDF 7/9 页】IC CTRLR HOT PLUG PCI 16-SOIC

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Sheet目录40

3页 4页 5页 6页 [7页]8页 9页

FN4640.5

November 18, 2004

Applications

Implementing the HIP1011B in the CompactPCI

Hot Swap Application

This application offers to the CompactPCI peripheral board

designer programmable Over Current (OC) protection,

programmable delays to latch off, and soft start ramp turn on

for all four supplies with simultaneous latch off upon OC fault

detection.

Figure 6 illustrates the HIP1011EVAL2 evaluation board for

CompactPCI Hot Swap implementation. The shaded

components are the external components necessary to

accomplish both controlled power up and turn-on. For

minimum PCB area single gate logic can be used.

Insertion Sequence

Because of the staggered pin lengths in the CompactPCI

connector, as the board is inserted into the slot, the ground

bus plane is connected first via the longest pins referencing

the HIP1011B by way of the PWRON, OCSET and GND pins

through R4 and R3. Additionally the three-state driver, U1

address line is referenced through R6.

Subsequently the medium length pins engage to connect the

+3.3V, +5V, +12V, -12V lines to the inputs, activating the

HIP1011B, and the 2 logic devices, U1 and U2. At this time the

HIP1011B is in control holding off all the MOSFET switches, as

PWRON is being held low. With the logic devices powered the

inverter U2 input is pulled high putting a low on the three-state

driver U1 input which is passed through to the PWRON pin.

Upon complete insertion the shortest length pin, board

present which is tied to ground on the backplane finally

contacts the inverter input. The inverter output pulls high

turning on the HIP1011B through U1 thus, the board is fully

powered on only upon complete insertion.

Fault Reset

If an overcurrent condition is detected on the board by the

HIP1011B the FLTN signal transitions low, once the

FLTN,TH

is reached all the switches are simultaneously

switched off protecting the system, the board and its

components. The system controller is notified of the fault

occurrence by the FLTN signal.

Reset of the faulted card is accomplished by a positive pulse

on the three-state oe

input. The pulse puts U1 output into a

high Z state allowing R4 to pull the HIP1011B PWRON pin

low, resetting the HIP1011B. The HIP1011B switches turn

back on when U1 oe

input returns to a low state resulting in

PWRON going high. The reset pulse can be generated by

either the system restart/reset to the master board or from

the master system board to any of the peripheral boards in

the system.

Q1, Q2

Q3, Q4

M12VIN

FLTN

3V5VG

12VIN

3VISEN

3VS

OCSET

M12VO

12VG

GND

12VO

5VISEN

5VS

PWRON

M12VG

HIP1011

12V INPUT

5V INPUT

-12V INPUT

3.3V INPUT

FLTN

3.3VOUT

5VOUT

-12V

OUT

+12VOUT

PULSE HIGH TO RESET FAULT

BOARD PRESENT

PIN ON

BACKPLANE

FIGURE 6. HIP1011B CompactPCI APPLICATION CIRCUIT

NOTES:

3. Each test point (TP) on HIP1011EVAL2 refers to device pin number.

4. SIGNAL_GND, SHIELD_GND and SHORTPIN_GND can be jumpered together for ease of evaluation.

5. HIP1011B devices can be placed into HIP1011EVAL2 board for evaluation or contact INTERSIL for a HIP1011B equipped evaluation board.

HIP1011B

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