參數(shù)資料
型號(hào)： MAX16046
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)： 58/68頁
文件大小： 570K
代理商： MAX16046
M
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
58
______________________________________________________________________________________
Set the DACOUT_ range bits (see the DAC Outputs
section) such that V
REF
falls approximately halfway
within the DACOUT range. Set R
5
to vary the amount of
control the DAC has on the output voltage of the power
supply. Large values of R
5
correspond to higher
degree of resolution control over the output voltage,
and small values of R
5
correspond to lesser degree of
resolution control. Be sure to respect the minimum and
maximum output voltages that the DC-DC converter is
capable of generating.
The following is an example that illustrates the use of
the formulas for calculating the margin up and margin
down values. This example uses a generic 3.3V DC-DC
converter with a trim input. Below are the margin up
and margin down formulas taken from the data sheet
for the power supply:
By inspecting these formulas, V
REF
= 1.225V, R
3
=
1k
Ω
, and R
4
= 1k
Ω
. Set the DACOUT_ range from 0.8V
to 1.6V to fit the reference voltage. The output voltage
of the DC-DC converter is 3.3V; therefore the ratio (1 +
R
1
/ R
2
) = V
OUT
/ V
REF
= 3.3 / 1.225 = 2.69.
Set R
5
to zero to use the widest trim range possible
(increase R
5
to decrease the trim range). Insert these
values into the equations for the output voltage:
For V
DACOUT_
= 0.8V, V
OUT
= 2.72V, and for
V
DACOUT_
= 1.6V, V
OUT
= 3.80V. These output volt-
ages correspond with a margin down limit of -17.6%
and a margin up limit of 15.2%. Since the reference
voltage is not exactly in the center of the DACOUT_
range, the margin limits are not symmetrical. To
decrease the margin limits, increase the value of R
5
.
Maintaining Power During a Fault
Condition
Power to the MAX16046/MAX16048 must be main-
tained for a specific period of time to ensure a success-
ful EEPROM fault log operation during a fault that
removes power to the circuit. The amount of time
required depends on the settings in the fault control
register (r47h[1:0]) according to Table 36.
Maintain power for shutdown during fault conditions in
applications where the always-on power supply cannot
be relied upon by placing a diode and a large capaci-
tor between the voltage source, V
IN
, and V
CC
(Figure
18). The capacitor value depends on V
IN
and the time
delay required, t
FAULT_SAVE
. Use the following formula
to calculate the capacitor size:
where the capacitance is in Farads and t
FAULT_SAVE
is
in seconds. I
CC(MAX)
is 6.5mA, V
DIODE
is the voltage
drop across the diode, and V
UVLO
is 2.85V. For exam-
ple, with a V
IN
of 14V, a diode drop of 0.7V, and a
t
FAULT_SAVE
of 0.204s, the minimum required capaci-
tance is 127μF.
C
t
I
V
V
V
FAULT_SAVE
CC(MAX)
IN
DIODE
UVLO
=
×
V
2.69
1k
V
1k
1.225
2k
2.69
V
1.225
2
OUT
DACOUT
DACOUT_
=
(
)
×
+
×
(
)
+
(
)
Ω
Ω
Ω
TRIM DOWN:R
100
%
Δ
2 k
(
TRIM UP:R
V
(100
%)
1.225 %
100
2 %
%
k
ADJ_DOWN
ADJ_UP
OUT_NOM
=
)
=
+
+
Δ
(
)
Ω
Ω
MAX16046
MAX16048
TRIM
V
REF
V
DACOUT_
R
2
R
5
R
1
OUT
DC-DC OR LDO
R
4
R
3
Figure 17. Connections for Margining Using Trim Input Method
Table 36. EEPROM Fault Log Operation
Period
FAULT CONTROL
REGISTER VALUE
r47h [1:0]
DESCRIPTION
REQUIRED
PERIOD
t
FAULT_SAVE
(ms)
00
Failed lines and
ADC values saved
204
01
10
Failed lines saved
ADC values saved
60
168
11
No information
saved
N/A
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參數(shù)描述
MAX16046ACB+ 功能描述:監(jiān)控電路 12Ch 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
MAX16046ACB+T 功能描述:監(jiān)控電路 12Ch 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
MAX16046ATN+ 功能描述:監(jiān)控電路 12Ch 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
MAX16046ATN+T 功能描述:監(jiān)控電路 12Ch 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
MAX16046ECB+ 功能描述:監(jiān)控電路 12Ch 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
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