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參數(shù)資料
| 型號(hào)： | MAX16048 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers |
| 中文描述： | 12/8通道EEPROM可編程系統(tǒng)管理器，提供非易失故障寄存器 |
| 文件頁數(shù)： | 32/68頁 |
| 文件大小： | 570K |
| 代理商： | MAX16048 |
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M
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
32
______________________________________________________________________________________
Closed-Loop Tracking
The MAX16046/MAX16048 track up to four voltages
during any time slot except Slot 0 and Slot 12.
Configure GPIO1–GPIO4 as sense line inputs (INS_) to
monitor tracking voltages. Configure GPIO6 as
FAULTPU
to indicate tracking faults, if desired. See the
General-Purpose Inputs/Outputs section for information
on configuring GPIOs.
For closed-loop tracking, use MON1, EN_OUT1, and
INS1 together to form a complete channel. Use MON2,
EN_OUT2, and INS2 to form a second complete chan-
nel. Use MON3, EN_OUT3, and INS3 together to form a
third channel; and use MON4, EN_OUT4, and INS4 to
form a fourth channel.
When configured for closed-loop tracking, assign each
EN_OUT_ to the same slot as its associated single
monitoring input (MON_). For example, if EN_OUT2 is
assigned to Slot 3, the monitoring input is MON2 and
must be assigned to Slot 3. This is because the MON_
input, checked at the start of the slot, must be valid
before tracking can begin. Tracking begins immediate-
ly and must finish before the power-up fault timeout
expires, or a fault will trigger. EN_OUT_ configured for
closed-loop tracking cannot be assigned to Slot 0.
The tracking control circuitry includes a ramp generator
and a comparator control block for each tracked volt-
age (see the Functional Diagram and Figure 5). The
comparator control block compares each INS_ voltage
with a control voltage ramp. If INS_ voltages vary from
the control ramp by more than 150mV (typ), the com-
parator control block signals an alert that dynamically
stops the ramp until the slow INS_ voltage rises to with-
in the allowed voltage window. The total tracking time is
extended under these conditions, but must still com-
plete within the selected power-up/power-down fault
timeout. The power-up/power-down tracking fault time-
out period is adjustable through r4Eh[3:0].
A voltage difference between any two tracking INS_
voltages exceeding 330mV generates a tracking fault,
forcing all EN_OUT_ voltages low and generating a
fault log. If configured as
FAULTPU
, GPIO6 asserts
when a tracking fault occurs.
The comparator control blocks also monitor INS_ voltages
with respect to input (MON_) voltages. Under normal con-
ditions each INS_ tracks the control ramp until the INS_
voltages reach the configured power-good (PG) thresh-
olds, set as a programmable percentage of the MON_
voltage. Use register r64h to set the PG thresholds (Table
15). Once PG is detected, the external n-channel FET sat-
urates with 5V (typ) applied between gate and source.
The slew rate for the control ramp is programmable from
100V/s to 800V/s in r4Fh[5:4] (see Table 13).
Power-down initiates when EN is forced low or when
the
Software Enable
bit in r4Dh[0] is set to ‘1.’ If the
Reverse Sequence bit is set (r54h[4]) INS_ voltages fol-
low a falling reference ramp to ground as long as
MON_ voltages remain high enough to supply the
required voltage/current. If a monitored voltage drops
faster than the control ramp voltage or the correspond-
ing MON_ voltage falls too quickly, power-down track-
ing operation is terminated and all EN_OUT_ voltages
are immediately forced to ground. If the Reverse
Sequence bit is set to ‘0,’ all EN_OUT_ voltages are
forced low simultaneously.
The MAX16046/MAX16048 include selectable internal
100
Ω
pulldown resistors to ensure that tracked voltages
are not held high by large external capacitors during a
fault event. The pulldowns help to ensure that monitored
INS_ voltages are fully discharged before the next power-
up cycle is initiated. These pulldowns are high imped-
ance during normal operation. Set r4Eh[7:4] to ‘1’ to
enable the pulldown resistors (Table 13). These pulldown
resistors may also be used with EN_OUT1–EN_OUT4
channels not configured for closed-loop tracking, which
is useful to discharge the output capacitors of a DC-DC
converter during shutdown. For this case, configure the
GPIO as an INS_ input and set the 100
Ω
pulldown bit,
but do not enable closed-loop tracking. Connect the
INS_ input to the output of the power supply.
MON_
EN_OUT_
INS_
V
IN
V
OUT
REFERENCE
RAMP
LOGIC
ADC MUX
V
TH_PG
100
Ω
GATE
DRIVE
Figure 5. Closed-Loop Tracking
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX16048ACB+ | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16048ACB+T | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16048ATN+ | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16048ATN+T | 功能描述:監(jiān)控電路 8Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX16048ECB+T | 制造商:Maxim Integrated Products 功能描述: |
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