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參數(shù)資料
| 型號(hào)： | ADM1070 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | -48 V Hot Swap Controller |
| 中文描述： | -48 V熱風(fēng)熱插拔控制器 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 367K |
| 代理商： | ADM1070 |
REV. 0
ADM1070
–11–
UNDERVOLTAGE/OVERVOLTAGE DETECTION
The ADM1070 incorporates single-pin overvoltage and
undervoltage detection with a programmable operating voltage
window. When
the voltage on the
UV/OV pin rises above the
OV rising threshold or falls below the UV falling threshold, a
fault signal is generated that disables the linear current regulator
and results in the GATE Pin being pulled low. The voltage fault
signal is time filtered so that faults of duration less than the UV/
OV glitch filter time, t
FLT
, do not force the gate drive low (t
FLT
is set by the choice of external capacitor C
T
, see Table III). The
filter operates only on
the “faulting” edge (i.e., on a high to
low transition on the
undervoltage monitor and on a low to
high transition on the overvoltage monitor). The analog com-
parators have some hysteresis to provide smooth switching of
the comparator inputs.
If the voltage on UV/OV goes out of range (i.e., below 0.86 V
or
above 1.97 V) gate is pulled low. If
the UV/OV voltage
subse
quently re-enters the operating voltage window, the
ADM1070
will
restore the gate drive.
The overvoltage and undervoltage thresholds are:
UV turning on = 0.91 V
UV turning off = 0.86 V
OV turning on = 1.97 V
OV turning off = 1.93 V
The undervoltage/overvoltage levels are determined by selection
of the resistor ratio R1/R2, (see Table I). These two resistors
form a resistor divider that generates the voltage; at the UV/OV
Pin, which
is proportional to the supply voltage. By choosing
this ratio
carefully, the ADM1070 can be programmed to apply
the supply voltage to the load only when it is within specific
thresholds.
For example, for R1 = 39 k
and R2 = 1 k
the
typical operating range is 36.4 V to 76.8 V. The undervoltage
and
overvoltage
shutdown thresholds are 34.4 V and 77.2 V
for this resistor
ratio. 1% resistors should be used to maintain
the accuracy of these threshold levels.
Voltage Divider:
V
UV/OV
= V
SS
(R2/(R1 + R2))
For R2 = 1 k
:
V
SS
= V
UV/OV
(R1 + 1)
And for R1 = 39 k
:
V
SS
= 40 V
UV/OV
Operating Range:
UV => 40(0.91) = 36.4 V
OV => 40(1.93) = 77.2 V
UV/OV Shutdown Levels:
UV => 40(0.86) = 34.4 V
OV => 40(1.97) = 78.8 V
V
SS
–
–
+
+
R1
R2V
UV/OV
Figure 3. Voltage Divider
R1 – k (FOR R2 = 1k )
0
O
36
40
20
80
60
100
120
30
47
51
33
43
39
Figure 4. Operating Voltage Window vs. Resistance Ratio
V
61.0
67.0
72.9
78.8
86.7
94.6
102.4
Resistor Ratio
R1 (for R2 = 1 k )
k
30
33
36
39
43
47
51
Undervoltage
Overvoltage
V
UV
(Falling)
V
26.7
29.2
31.8
34.4
37.8
41.3
44.7
V
UV
(Rising)
V
28.2
31.0
33.7
36.4
40.0
43.7
46.4
V
OV
(Falling)
V
59.8
65.6
71.4
77.2
84.9
92.6
100.4
V
OV
(Rising)
Table IV. Resistance Ratios and Operating Voltage Windows
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ADM1070ART | 制造商:AD 制造商全稱:Analog Devices 功能描述:-48 V Hot Swap Controller |
| ADM1070ART-REEL | 制造商:Analog Devices 功能描述:Hot Swap Controller 1-CH -80V 6-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:6-PIN -48V HOT SWAP CONTROLLER I.C. - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:6-PIN -48V HOT SWAP CONTROLLER I.C. - Tape and Reel |
| ADM1070ART-REEL7 | 功能描述:IC CTRL HOTSWAP -48 SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| ADM1070ARTZ-REEL | 功能描述:IC CTRLR HOTSWAP -48V SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| ADM1070ARTZ-REEL7 | 功能描述:IC CTRLR HOTSWAP -48V SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
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