MAX5960AECS+T【PDF 11/25 页】IC CTRLR HOT-PLUG QD 80-TQFP

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Sheet目录43

7页 8页 9页 10页 [11页]12页 13页 14页 15页

Quad PCI Express, Hot-Plug Controllers

______________________________________________________________________________________ 11

Pin Description

NAME

FUNCTION

12SB-

Slot B 12V Negative Current-Sense Input. Connect 12SB- to the negative side of the current-sense

resistor using the Kelvin-sensing technique to ensure accurate current sensing.

12SB+

Slot B 12V Positive Current-Sense Input. Connect the positive terminal of the current-sense resistor to

12SB+ using the Kelvin-sensing technique to ensure accurate current sensing.

AUXONB

Slot B 3.3V Auxiliary Output Enable. A logic-high at AUXONB turns on the slot B auxiliary output.

ONB

Slot B 12V and 3.3V Main Outputs Enable. A logic-high at ONB turns on the 12V and 3.3V main outputs

of slot B (see Table 2).

INPUT1

Digital Logic Gate Input 1

OUTPUT1 Digital Output 1. 4ms debounced digital output of INPUT1.

INPUT2

Digital Logic Gate Input 2

OUTPUT2 Digital Output 2. 4ms debounced digital output of INPUT2.

9, 61, 80

N.C.

No Connection. Not internally connected. Leave unconnected.

FOND

Slot D Forced-On Input. FOND has a 50k?internal pullup to 3.3VAUXIN. A logic-low on FOND turns on

all slot D outputs as long as the power inputs are within their operating range, regardless of the status

of the other input signals. Leave FOND unconnected for normal operation.

PRES-DETD

Slot D Present-Detect Input. PRES-DETD accepts inputs from PRSNT#_# on a PCIe connector. PRES-

DETD has an internal 50k?pullup to 3.3VAUXIN. When PRES-DETA is low, the outputs follow the

command from OND and AUXOND after a 4ms debounced time. When PRES-DETD goes from low to

high, all outputs of the respective slot shut down with no delay.

OND

Slot D 12V and 3.3V Main Outputs Enable. A logic-high at OND turns on the 12V and 3.3V main outputs

of slot D (see Table 2).

AUXOND

Slot D 3.3V Auxiliary Output Enable. A logic-high at AUXOND turns on the slot D auxiliary output.

GND

Ground

FONC

Slot C Forced-On Input C. FONC has a 50k?internal pullup to 3.3VAUXIN. A logic-low on FONC turns

on all slot C outputs as long as the power inputs are within their operating range, regardless of the

status of the other input signals. Leave FONC unconnected for normal operation.

PRES-DETC

Slot C Present-Detect Input. PRES-DETC accepts inputs from PRSNT#_# on a PCIe connector. PRES-

DETC has an internal 50k?pullup to 3.3VAUXIN. When PRES-DETC is low, the outputs follow the

command from ONC and AUXONC after a 4ms debounced time. When PRES-DETC goes from low to

high, all outputs of the respective slot shut down with no delay.

ONC

Slot C 12V And 3.3V Main Outputs Enable. A logic-high at ONC turns on the 12V and 3.3V main outputs

of slot C (see Table 2).

AUXONC

Slot C 3.3V Auxiliary Output Enable. A logic-high at AUXONC turns on the slot C auxiliary output.

12SC+

Slot C 12V Positive Current-Sense Input. Connect the positive terminal of the current-sense resistor to

12SC+ using the Kelvin-sensing technique to ensure accurate current sensing.

12SC-

Slot C 12V Negative Current-Sense Input. Connect 12SC- to the negative side of the current-sense

resistor using the Kelvin-sensing technique to ensure accurate current sensing.

12GC

Slot C 12V Gate-Drive Output. Connect 12GC to the gate of slot Cs 12V MOSFET. At power-up, 12GC

is raised to the internal charge-pump voltage level by a constant current.

3.3SC+

Slot C 3.3V Positive Current-Sense Input. Connect the positive side of the current-sense resistor to

3.3SC+ using the Kelvin-sensing technique to ensure accurate current sensing.

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