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參數(shù)資料
| 型號(hào)： | MAX16032 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | EEPROM-Based System Monitors with Nonvolatile Fault Memory |
| 中文描述： | 基于EEPROM的系統(tǒng)監(jiān)控器，提供非易失故障存儲(chǔ) |
| 文件頁數(shù)： | 19/42頁 |
| 文件大小： | 396K |
| 代理商： | MAX16032 |
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M
EEPROM-Based System Monitors
with Nonvolatile Fault Memory
______________________________________________________________________________________
19
Current Monitoring
The MAX16031 provides current-sense inputs CS+/CS-
and a current-sense amplifier for current monitoring
(see Figure 3). There are two programmable current-
sense thresholds: primary overcurrent and secondary
overcurrent. For fast fault detection, the primary over-
current threshold is implemented with an analog com-
parator connected to the
OVERC
output. The primary
threshold equation is:
where I
TH
is the current threshold to be set, V
CSTH
is
the threshold set by r19h[1:0], and R
SENSE
is the value
of the sense resistor. See Table 4 for a description of
r19h. The ADC output for a current-sense conversion is:
where X
ADC
is the 8-bit decimal ADC result, V
SENSE
is
V
CS+
- V
CS-
, A
V
is the current-sense voltage gain set
by r19h[1:0], and V
RBP
is the reference voltage at RBP
(1.4V typical).
OVERC
is latched when the primary overcurrent thresh-
old is exceeded by programming r5Ch[4]. The latch is
cleared by writing a ‘1’ to r53h[6].
OVERC
depends
only on the primary overcurrent threshold. Other fault
outputs are programmed to depend on the secondary
overcurrent threshold. The secondary overcurrent
threshold is implemented through ADC conversions
and digital comparisons. The secondary overcurrent
threshold contains programmable time delay options
located in r5Ch[1:0]. Primary and secondary current-
sense faults are enabled/disabled through r1Bh[3].
Temperature Monitoring
The MAX16031 provides two sets of remote diode inputs,
DXP1/DXN1 and DXP2/DXN2, and one internal tempera-
ture sensor. The MAX16032 provides one set,
DXP1/DXN1, and one internal temperature sensor.
Calibration registers provide adjustments for gain and off-
set to accommodate different types of remote diodes.
The internal temperature sensor circuitry is factory
trimmed. In addition to offset/gain trimming, a program-
mable lowpass filter is provided. See Figure 4 for the
block diagram of the temperature sensor circuitry. The
remote diode is actually a diode-connected transistor.
See Application Notes AN1057 and AN1944 for informa-
tion on error budget and several transistor manufacturers.
X
V
A
V
ADC
SENSE
V
RBP
=
×
×
(
)
2
1
8
I
V
R
TH
CSTH
SENSE
=
+
-
+
+
-
-
*A
V
CS+
CS-
*V
CSTH
*ADJUSTABLE BY r19h [1:0]
R
SENSE
TO ADC MUX
V
MON
LOAD
V
L
OVERC
MAX16031
Figure 3. Current-Sense Block Diagram
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT RANGE
DESCRIPTION
[1:0]
Overcurrent Primary Threshold and Current-Sense Gain Setting:
00 = 200mV threshold, AV = 6V/V
01 = 100mV threshold, AV = 12V/V
10 = 50mV threshold, AV = 24V/V
11 = 25mV threshold, AV = 48V/V
19h
99h
[7:2]
[5:0]
[7:6]
Remote Temperature Sensor 1 Gain Trim. Note bit 6 is inverted.
Remote Temperature Sensor 1 Gain Trim
Not used
4Fh
CFh
Table 4. Overcurrent Primary Threshold and Remote Temperature Sense Gain Trim
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相關(guān)代理商/技術(shù)參數(shù) |
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| MAX16032ETM+ | 功能描述:監(jiān)控電路 EEPROM-Based w/NV Fault Memory 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 |
| MAX16032ETM+T | 功能描述:監(jiān)控電路 EEPROM-Based w/NV Fault Memory 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 |
| MAX16033LLB23+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 2.32V 10PIN UDFN - Rail/Tube |
| MAX16033LLB23+T | 功能描述:監(jiān)控電路 Battery Backup 2.5V-Ep 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 |
| MAX16033LLB26+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR MONITOR 2.63V 10PIN UDFN - Rail/Tube |
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