max5961 Maxim Integrated Products, Inc., max5961 Datasheet - Page 14

• Manufacturer Part Number: max5961
• Description: 0 To 16v, Quad, Hot-swap Controller With 10-bit Current And Voltage Monitor
• Manufacturer: Maxim Integrated Products, Inc.

0 to 16V, Quad, Hot-Swap Controller
with 10-Bit Current and Voltage Monitor
14
The MAX5961 0 to 16V, quad, hot-swap controller pro-
vides complete protection for multisupply systems. The
device allows the safe insertion and removal of circuit
cards into live backplanes. The MAX5961 is an
advanced hot-swap controller that monitors voltage and
current with an internal 10-bit ADC. The device provides
two levels of overcurrent circuit-breaker protection; a
fast-trip threshold for a fast turn-off and a lower slow-trip
threshold for a delayed turn-off. The maximum overcur-
rent circuit-breaker threshold range is set independently
for each channel with a three-state input (ILIM_) or by
programming though an I
The internal 10-bit ADC is multiplexed to monitor the
output voltage and current of each hot-swap channel.
The total time to cycle through all the eight measure-
Table 1a. Register Address Map (Channel Specific)
adc_chx_cs_h
adc_chx_cs_l
adc_chx_mon_h
adc_chx_mon_l
min_chx_cs_h
min_chx_cs_l
max_chx_cs_h
max_chx_cs_l
min_chx_mon_h
min_chx_mon_l
max_chx_mon_h
max_chx_mon_l
REGISTER
______________________________________________________________________________________
High 8 bits ([9:2]) of latest
current-signal ADC result
Low 2 bits ([1:0]) of latest
current-signal ADC result
High 8 bits ([9:2]) of latest
voltage-signal ADC result
Low 2 bits ([1:0]) of latest
voltage-signal ADC result
High 8 bits ([9:2]) of current-
signal minimum value
Low 2 bits ([1:0]) of current-
signal minimum value
High 8 bits ([9:2]) of current-
signal maximum value
Low 2 bits ([1:0]) of current-
signal maximum value
High 8 bits ([9:2]) of voltage-
signal minimum value
Low 2 bits ([1:0]) of voltage-
signal minimum value
High 8 bits ([9:2]) of voltage-
signal maximum value
Low 2 bits ([1:0]) of voltage-
signal maximum value
Detailed Description
DESCRIPTION
2
C interface.
CHANNEL 1
0x00
0x01
0x02
0x03
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
CHANNEL 2
ADDRESS (HEX CODE)
ments is 100µs (typ). Each 10-bit value is stored in an
internal circular buffer so that 50 past samples of each
signal can be read back through the I
any time or after a fault condition.
The MAX5961 can be configured as four independent
hot-swap controllers, hot-swap controllers operating in
pairs, or as a group of four hot-swap controllers.
The device also includes five digital comparators per
hot-swap channel to implement overcurrent warning,
two levels of overvoltage detection, and two levels of
undervoltage detection. The limits for overcurrent, over-
voltage, and undervoltage are user-programmable.
When any of the measured values violates the program-
mable limits, an external ALERT signal is asserted. In
addition to the ALERT signal, depending on the select-
ed operating mode, the MAX5961 can deassert a
power-good signal and/or turn-off the external MOSFET.
0x1C
0x1D
0x05
0x06
0x07
0x18
0x19
0x1A
0x1B
0x1E
0x1F
0x04
CHANNEL 3
0x08
0x09
0x0A
0x0B
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
CHANNEL 4
0x0C
0x0D
0x2A
0x2B
0x2C
0x2D
0x0E
0x0F
0x28
0x29
0x2E
0x2F
RESET
VALUE
0x00
0x00
0x00
0x00
0xFF
0x03
0x00
0x00
0xFF
0x03
0x00
0x00
2
C interface at
TABLE
10
19
20
13
14
15
16
32
33
34
35
9