參數(shù)資料
型號： MAX5978ETJ+
廠商： Maxim Integrated
文件頁數(shù)： 13/38頁
文件大小： 2412K
描述： IC CTLR HOT-SWAP 32TQFN
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 1
類型： 熱交換控制器
應用： 刀峰式服務器，網(wǎng)絡應用設備
內(nèi)部開關： 無
電流限制： 可調(diào)
電源電壓： 2.7 V ~ 16 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 32-WFQFN 裸露焊盤
供應商設備封裝： 32-TQFN-EP（5x5）
包裝： 管件
0 to 16V, Hot-Swap Controller with 10-Bit
Current, Voltage Monitor, and 4 LED Drivers
13
  Detailed Description
The MAX5978 includes a set of registers that are
accessed through the I
2
C interface. Some of the reg-
isters are read only and some of the registers are read
and write registers that can be updated to configure the
device for a specific operation. See Tables 1a and 1b for
the register maps.
Hot-Swap Channel On-Off Control
Depending on the configuration of the EN1 and EN2
bits, when V
IN
 is above the V
UVLO
 threshold and the ON
input reaches its internal threshold, the device turns on
the external n-channel MOSFET for the hot-swap chan-
nel, allowing power to flow to the load. The channel is
enabled depending on the output of a majority function.
EN1, EN2, and ON are the inputs to the majority function
and the channel is enabled when two or more of these
inputs are 1:
(Channel enabled) = (EN1 x EN2) + (EN1 x ON) +
  (EN2 x ON)
Inputs ON and EN2 can be set externally; the initial state
of the EN2 bit in register chxen is set by the state of the
HWEN input when V
IN
 rises above V
UVLO
. The ON input
connects to an internal precision analog comparators
with a 0.6V threshold. Whenever V
ON
 is above 0.6V, the
ON bit in register status1[0] is set to 1. Inputs EN1 and
EN2 can be set using the I
2
C interface; the EN1 bit has
a default value of 0. This makes it possible to enable or
disable the hot-swap channel with or without using the
I
2
C interface (see Tables 2, 3a, and 3b).
Table 1a. Register Address Map (Channel Specific)
REGISTER
NAME
DESCRIPTION
REGISTER
NUMBER
RESET
VALUE
READ/
WRITE
adc_cs_msb
High 8 bits ([9:2]) of latest current-signal ADC result
0x00
0x00
R
adc_cs_lsb
Low 2 bits ([1:0]) of latest current-signal ADC result
0x01
0x00
R
adc_mon_msb
High 8 bits ([9:2]) of latest voltage-signal ADC result
0x02
0x00
R
adc_mon_lsb
Low 2 bits ([1:0]) of latest voltage-signal ADC result
0x03
0x00
R
min_cs_msb
High 8 bits ([9:2]) of current-signal minimum value
0x08
0xFF
R
min_cs_lsb
Low 2 bits ([1:0]) of current-signal minimum value
0x09
0x03
R
max_cs_msb
High 8 bits ([9:2]) of current-signal maximum value
0x0A
0x00
R
max_cs_lsb
Low 2 bits ([1:0]) of current-signal maximum value
0x0B
0x00
R
min_mon_msb
High 8 bits ([9:2]) of voltage-signal minimum value
0x0C
0xFF
R
min_mon_lsb
Low 2 bits ([1:0]) of voltage-signal minimum value
0x0D
0x03
R
max_mon_msb
High 8 bits ([9:2]) of voltage-signal maximum value
0x0E
0x00
R
max_mon_lsb
Low 2 bits ([1:0]) of voltage-signal maximum value
0x0F
0x00
R
uv1th_msb
High 8 bits ([9:2]) of undervoltage warning (UV1) threshold
0x1A
0x00
R/W
uv1th_lsb
Low 2 bits ([1:0]) of undervoltage warning (UV1) threshold
0x1B
0x00
R/W
uv2th_msb
High 8 bits ([9:2]) of undervoltage critical (UV2) threshold
0x1C
0x00
R/W
uv2th_lsb
Low 2 bits ([1:0]) of undervoltage critical (UV2) threshold
0x1D
0x00
R/W
ov1thr_msb
High 8 bits ([9:2]) of overvoltage warning (OV1) threshold
0x1E
0xFF
R/W
ov1thr_lsb
Low 2 bits ([1:0]) of overvoltage warning (OV1) threshold
0x1F
0x03
R/W
ov2thr_msb
High 8 bits ([9:2]) of overvoltage critical (OV2) threshold
0x20
0xFF
R/W
ov2thr_lsb
Low 2 bits ([1:0]) of overvoltage critical (OV2) threshold
0x21
0x03
R/W
oithr_msb
High 8 bits ([9:2]) of overcurrent warning threshold
0x22
0xFF
R/W
oithr_lsb
Low 2 bits ([1:0]) of overcurrent warning threshold
0x23
0x03
R/W
dac_fast
Fast-comparator threshold DAC setting
0x2E
0xBF
R/W
cbuf_ba_v
Base address for block read of 50-sample voltage-signal data buffer
0x46

R
cbuf_ba_i
Base address for block read of 50-sample current-signal data buffer
0x47

R
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相關代理商/技術參數(shù)
參數(shù)描述
MAX5978ETJ+ 功能描述:熱插拔功率分布 0-16V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5978ETJ+T 功能描述:熱插拔功率分布 0-16V Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5980EVKIT# 功能描述:電源開關 IC - POE / LAN MAX5980 Eval Kit RoHS:否 制造商:Fairchild Semiconductor 開關數(shù)量:Single 開關配置:SPST 開啟電阻（最大值）:7.3 Ohms 串話: 帶寬: 開啟時間（最大值）:13 ns 關閉時間（最大值）:20 ns 切換電壓（最大）: 工作電源電壓:8 V to 26 V 最大工作溫度:+ 125 C 安裝風格:Through Hole 封裝 / 箱體:TO-220F-6
MAX5980EVKIT+ 功能描述:電源開關 IC - POE / LAN RoHS:否 制造商:Fairchild Semiconductor 開關數(shù)量:Single 開關配置:SPST 開啟電阻（最大值）:7.3 Ohms 串話: 帶寬: 開啟時間（最大值）:13 ns 關閉時間（最大值）:20 ns 切換電壓（最大）: 工作電源電壓:8 V to 26 V 最大工作溫度:+ 125 C 安裝風格:Through Hole 封裝 / 箱體:TO-220F-6
MAX5980GTJ+ 功能描述:電源開關 IC - POE / LAN 0-16V Hot-Swap Controller RoHS:否 制造商:Fairchild Semiconductor 開關數(shù)量:Single 開關配置:SPST 開啟電阻（最大值）:7.3 Ohms 串話: 帶寬: 開啟時間（最大值）:13 ns 關閉時間（最大值）:20 ns 切換電壓（最大）: 工作電源電壓:8 V to 26 V 最大工作溫度:+ 125 C 安裝風格:Through Hole 封裝 / 箱體:TO-220F-6
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