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| 型號： | MAX5978ETJ+ |
| 廠商： | Maxim Integrated |
| 文件頁數(shù)： | 29/38頁 |
| 文件大小： | 2412K |
| 描述： | IC CTLR HOT-SWAP 32TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 刀峰式服務(wù)器，網(wǎng)絡(luò)應(yīng)用設(shè)備 |
| 內(nèi)部開關(guān)： | 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(yīng)商設(shè)備封裝： | 32-TQFN-EP（5x5） |
| 包裝： | 管件 |
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0 to 16V, Hot-Swap Controller with 10-Bit
Current, Voltage Monitor, and 4 LED Drivers
29
The contents of a buffer can be retrieved as a block read
of either fifty 10-bit values (spanning 2 bytes each) or of
50 high-order bytes, depending on the per-signal bit set-
tings of register cbufrd_hibyonly (see Table 42).
If the circular buffer contents are retrieved as 10-bit
data, the first byte read-out is the high-order 8 bits of the
10-bit sample, and the second byte read-out contains
the 2 least-significant bits (LSBs) of the sample. This is
repeated for each of the 50 samples in the buffer. Thus,
2 bytes must be read for each 10-bit sample retrieved.
Conversely, if the buffer contents are retrieved as 8-bit
data, then each byte read-out contains the 8 MSBs of
each successive sample. It is important to remember
that in 10-bit mode, 100 bytes must be read to extract the
entire buffer contents, but in 8-bit mode, only 50 bytes
must be read.
The circular buffer system has a user-programmable
stop delay that specifies a certain number of sample
cycles to continue recording to the buffer after a shut-
down occurs. This delay value is stored in register
cbuf_dly_stop[5:0] (see Table 43).
The default (reset) value of the buffer stop delay is
25 samples, which means that an equal number of
samples are stored in the buffer preceding and follow-
ing the moment of the shutdown event. The buffer stop
delay is analogous to an oscilloscope trigger delay
because it allows the device to record what happened
both immediately before and after a shutdown. In other
words, when the contents of a circular buffer are read
out of the device, the shutdown event is by default
located in the middle of the recorded data. The balance
of data before and after an event can be altered by writ-
ing a different value (between 0 and 50) to the buffer
stop-delay register.
Latched-Off Fault Management
In the event of an overcurrent, undervoltage, or overvolt-
age condition that results in the shutdown of the hot-
swap channel, the device remains latched off.
To restart the latched-off channel, the user must either
cycle power to the IN input, or toggle the ON pin, EN1
bit, or the EN2 bit.
Table 40. Circular Buffer Read Addresses
Table 41. Circular Buffer Control Register Format
Table 42. Circular Buffer Resolution Register Format
ADDRESS
NAME
DESCRIPTION
0x46
cbuf_ba_v
Base address for voltage buffer block read
0x47
cbuf_ba_i
Base address for current buffer block read
Description:
Circular buffer run-stop control register (per-buffer control: 1 = run, 0 = stop)
Register Title:
cbuf_chx_store
Register Address:
0x19
RESET
VALUE
R
R
R
R
R/W
R/W
R/W
R/W
Unused
Unused
Ch0_i_run
Ch0_v_run
0x0F
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Description:
Circular buffer read-out resolution: high-order byte only, or 8-2 split 10-bit data
(per-buffer control: 1 = high-order byte output, 0 = full-resolution 10-bit output)
Register Title:
cbufrd_hibyonly
Register Address:
0x3F
RESET
VALUE
R
R
R
R
R/W
R/W
R/W
R/W
Unused
Unused
i_res
v_res
0x0F
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
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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(fēng)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(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5980EVKIT# | 功能描述:電源開關(guān) IC - POE / LAN MAX5980 Eval Kit RoHS:否 制造商:Fairchild Semiconductor 開關(guān)數(shù)量:Single 開關(guān)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(guān)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(fēng)格:Through Hole 封裝 / 箱體:TO-220F-6 |
| MAX5980EVKIT+ | 功能描述:電源開關(guān) IC - POE / LAN RoHS:否 制造商:Fairchild Semiconductor 開關(guān)數(shù)量:Single 開關(guān)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(guān)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(fēng)格:Through Hole 封裝 / 箱體:TO-220F-6 |
| MAX5980GTJ+ | 功能描述:電源開關(guān) IC - POE / LAN 0-16V Hot-Swap Controller RoHS:否 制造商:Fairchild Semiconductor 開關(guān)數(shù)量:Single 開關(guān)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(guān)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(fēng)格:Through Hole 封裝 / 箱體:TO-220F-6 |
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