MAX5935CAX Maxim Integrated Products, MAX5935CAX Datasheet - Page 34

• Manufacturer Part Number: MAX5935CAX
• Description: Hot Swap & Power Distribution
• Manufacturer: Maxim Integrated Products

Specifications of MAX5935CAX

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Use the program registers (Table 29) to set the nominal
value for t
the following formula:
where N is the decimal value of TF_PR[3:0] or
TS_PR[3:0], respectively.
A reset sets R28h = 77h, which sets t
60ms as shown in the Electrical Characteristics. Use
R28h in conjunction with the two TSTART and TFAULT
bits in register R16h to program the values of t
and t
2.72ms resolution.
Quad Network Power Controller
for Power-Over-LAN
Table 29. Program Register 3
34
TF_PR
TS_PR
SYMBOL
______________________________________________________________________________________
START
t
t
ADDRESS = 28h
FAULT
START
FAULT
from about 20ms to almost 330ms with a
BIT
nominal = 40.96ms + 2.72ms x N
nominal = 40.96ms + 2.72ms x N
7
6
5
4
3
2
1
0
and t
START
R/W
R
R
R
R
R
R
R
R
for all ports according to
TF_PR[3]. t
TF_PR[2]. t
TF_PR[1]. t
TF_PR[0]. t
TS_PR[3]. t
TS_PR[2]. t
TS_PR[1]. t
TS_PR[0]. t
FAULT
FAULT
FAULT
FAULT
FAULT
START
START
START
START
= t
nominal programming bit 3
nominal programming bit 2
nominal programming bit 1
nominal programming bit 0
nominal programming bit 3
nominal programming bit 2
nominal programming bit 1
nominal programming bit 0
START
FAULT
=
Example: Set TF_PR[3:0] = 1111b, TFAULT[1:0] = 11b
Then:
Note: The programmed value has the same percent-
age tolerance as the value specified in the Electrical
Characteristics.
DESCRIPTION
t
FAULT
= 4 x t
= 4 x (40.96ms + 2.72ms x 15)
= 327ms
FAULT
nominal