MAX5970ETX+ Maxim Integrated Products, MAX5970ETX+ Datasheet - Page 14

• Manufacturer Part Number: MAX5970ETX+
• Description: IC CTLR HOT-SWAP DUAL 36TQFN
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5970ETX+

• Applications: General Purpose, PCI Express
• Internal Switch(s): No
• Voltage - Supply: 2.7 V ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

0V to 16V, Dual Hot-Swap Controller with 10-Bit
Current and Voltage Monitor and 4 LED Drivers
Table 1b. Register Address Map (General) (continued)
The MAX5970 can operate as either two independent
hot-swap controllers or as a pair. See Table 2 for the
configuration option based on the MODE logic level.
Depending on the configuration of the Chx_EN1 and
Chx_EN2 bits, when V
and the ON_ input reaches its internal threshold, the
MAX5970 turns on the external n-channel MOSFET for
the corresponding channel, allowing power to flow to the
load. The channel is enabled depending on the output of
a majority function. Chx_EN1, Chx_EN2, and ON_ are the
inputs to the majority function and the channel is enabled
when two or more of these inputs are 1.
Table 2. Grouping Hot-Swap Channels
Table 3. chxen Register Format
14
LED_Flash
LED_ph_pu
LED_state
Description:
Register Title:
Register Address:
REGISTER
High/unconnected
_____________________________________________________________________________________
R/W
bit 7
MODE INPUT
Low
Hot-Swap Channels On-Off Control
R/W
bit 6
Grouping Hot-Swap Channels
LED flash/GPIO enable register
LED phase/weak pullup enable register
LED pins voltage state register (LED pins set open)
IN
is above the V
Channel enable bits, from HWEN input and Chx_EN1 bits
chxen
0x3B
Independent
FUNCTION
R/W
bit 5
Paired
UVLO
DESCRIPTION
R/W
bit 4
Each channel operates as an independent hot-swap controller. A fault
shutdown in one channel does not affect operation of other channel.
Channel 0 and channel 1 operate together as one pair. A fault shutdown in
one channel shuts down both channels in the pair. Both channels share the
ADC monitoring capability.
threshold
Ch2_EN2
R/W
bit 3
The inputs ON_ and Chx_EN2 can be set externally; the
initial state of the Chx_EN2 bits in register chxen is set
by the state of the HWEN input when V
V
analog comparators with a 0.6V threshold. Whenever
V
ter status1[0:1] is set to 1. The inputs Chx_EN1 and Chx_
EN2 can be set using the I
bits have a default value of 0. This makes it possible to
enable or disable each of the MAX5970 channels inde-
pendently with or without using the I
Tables 3, 4a, and 4b).
UVLO
ON_
(Channel enabled) = (Chx_EN1 x Chx_EN2) +
is above 0.6V, the corresponding ON_ bit in regis-
. The ON_ inputs connect to internal precision
Ch2_EN1
(Chx_EN1 x ON_) + (Chx_EN2 x ON_)
bit 2
R/W
DESCRIPTION
(HEX CODE)
ADDRESS
0x43
0x44
0x45
Ch1_EN2
R/W
bit 1
2
C interface; the Chx_EN1
RESET
VALUE
Ch1_EN1
0x00
0x00
0x00
R/W
bit 0
2
C interface (see
IN
rises above
WRITE
READ/
RESET
VALUE
R/W
R/W
R
—