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參數(shù)資料
| 型號： | MAX4210AETT |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | High-Side Power and Current Monitors |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, DSO6 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEEA, TDFN-6 |
| 文件頁數(shù)： | 20/32頁 |
| 文件大?。?/td> | 620K |
| 代理商： | MAX4210AETT |
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M
The common-mode voltage range is +4V to +28V and
independent of the supply voltage. With this feature, the
device can monitor the output current of a high-voltage
source while running at a lower system voltage typically
between 2.7V and 5.5V.
The MAX4211 has a current-sense amplifier output. The
voltage at IOUT is proportional to the voltage across
V
SENSE
:
V
IOUT
= A
VIOUT
x V
SENSE
where V
SENSE
is the voltage across RS+ and RS-, and
A
VIOUT
is the amplifier gain of the device given in Table 1.
Analog Multiplier
The MAX4210/MAX4211 integrate an analog multiplier
that enables real-time monitoring of power delivered to
a load. The voltage proportional to the load current is
fed to one input of the multiplier and a voltage propor-
tional to the source voltage is fed to the other. The ana-
log multiplier multiplies these two voltages to obtain an
output voltage proportional to the load power. The ana-
log multiplier is designed only to operate in the positive
quadrant, that is, the inputs and outputs are always
positive voltages.
For the MAX4210D/E/F and MAX4211D/E/F, the analog
multiplier full-scale input at IN is approximately 1V. This
independent multiplier input allows greater design flexi-
bility when using an external voltage-divider. For the
MAX4210A/B/C and MAX4211A/B/C, an integrated volt-
age-divider divides the source voltage at the RS+ pin
by a nominal value of 25 and passes this voltage to the
multiplier. Thus, the full-scale input voltage at RS+ is
25V. The integrated, trimmed resistor-dividers reduce
external component count and cost.
The voltage output at POUT is proportional to the output
power:
For the MAX4210A/B/C and MAX4211A/B/C:
V
POUT
= A
VPOUT
x V
SENSE
x V
RS+
For the MAX4210D/E/F and MAX4211D/E/F:
V
POUT
= A
VPOUT
x V
SENSE
x V
IN
Table 1. MAX4211 Current-Sense
Amplifier Gain and Full-Scale Sense
Voltage
where V
SENSE
is the voltage across RS+ and RS- and
A
VPOUT
is the amplifier gain of the device given in
Table 2.
Internal Comparators (MAX4211)
The MAX4211 features two uncommitted open-drain
output comparators. These comparators can be config-
ured to trip when load current or power reaches a set
limit. They can also be configured as a window com-
parator with wire-OR output. Comparator 1 (COUT1)
features latch-enable (LE) and inhibit (INHIBIT) inputs.
When LE is low, the comparator is transparent (it func-
tions as a regular unlatched comparator). When LE is
high, the comparator output (COUT1) is latched. When
high, the INHIBIT input suspends the comparator oper-
ation and latches the output to the current state. The
operation of INHIBIT is similar to LE, except it has a dif-
ferent input threshold and wider hysteresis. The INHIB-
IT logic-high threshold is 1.21V and logic-low threshold
is 0.6V with 0.6V hysteresis. INHIBIT is useful in pre-
venting the comparator from giving false output during
fast RS+ transients. INHIBIT is generally triggered by
an RC network connected to RS+ (see the
Applications
Information
). Both comparators have a built-in 300μs
blanking period at power-up to prevent false outputs.
The comparator outputs are open drain and they can
be pulled up to V
CC
, RS+, or any voltage less than
+28V. LE and INHIBIT are internally pulled down by a
1μA source.
High-Side Power and
Current Monitors
20
______________________________________________________________________________________
PART
CURRENT-SENSE
AMPLIFIER GAIN
(A
VIOUT
, V/V)
FULL-SCALE
SENSE VOLTAGE
(mV)
MAX4211A/D
MAX4211B/E
MAX4211C/F
16.67
25.00
40.96
150
150
100
PART
POWER-SENSE
AMPLIFIER GAIN
(A
VPOUT
, 1/V)
FULL-SCALE
SENSE VOLTAGE
(mV)
MAX4210A
MAX4210B
MAX4210C
MAX4210D
MAX4210E
MAX4210F
MAX4211A
MAX4211B
MAX4211C
MAX4211D
MAX4211E
MAX4211F
0.667
1.000
1.640
16.670
25.000
40.960
0.667
1.000
1.640
16.670
25.000
40.960
150
150
100
150
150
100
150
150
100
150
150
100
Table 2. MAX4210/MAX4211 Power-Sense
Amplifier Gain and Full-Scale Sense
Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4210AETT+ | 制造商:Maxim Integrated Products 功能描述:HIGH SIDE PWR AND CURRENT MONITOR 6TDFN EP - Rail/Tube |
| MAX4210AETT+T | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 High-Side Power & Current Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4210AETT-T | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 High-Side Power & Current Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4210AEUA | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 High-Side Power & Current Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX4210AEUA+ | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 High-Side Power & Current Monitor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
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