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參數(shù)資料
| 型號： | ZXCT1030 |
| 廠商： | ZETEX PLC |
| 元件分類： | 電源管理 |
| 英文描述： | HIGH-SIDE CURRENT MONITOR WITH COMPARATOR |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | MO-187, MSOP-8 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大?。?/td> | 103K |
| 代理商： | ZXCT1030 |
Voltage output Current Monitor
Referring to the block diagram, the current monitor
takes the small voltage developed across the sense
resistor (Vsense) and transfers it from the large
common mode supply voltage to a ground-referenced
signal with a gain of 10. The sense input common
mode range is 2.2V to 20V. In this range, a linearoutput
voltage is delivered.
Reference
The bandgap reference allows the comparator to
compare the translated Vsense with threshold value
chosen by the user which can be any voltage from 0 to
1.24V, configured by two external resistors which
forms Vcomp_in.
The output current which can be drawn from the
comparator reference (I
ref
source) is limited to 5
μ
A,
making potentiometers
≥
250k
threshold level. Where a lower potentiometer resistor
value is used, an additional resistor value should be
inserted between V
ref
and V
cc
to maintain sufficient
current for the reference. (as shown in figure 1.0).
suitable for setting a
The Voltage reference has a maximum current sink
capability.This magnitude ofcurrentwill be influenced
by the value of R
1
which is inserted between V
ref
and
V
cc.
The value of current flowing through R
1
can be
expressed as:
I = (Vcc -Vref) / R
1
Comparator
The open collector output is active low and is asserted
when Vsense x 10 (Vout) > Vcomp_in.
It can be connected to any voltage rail up to Vin via a
pull-up resistor. Suggest values for the resistor are in
the range of 10-100k .
In the case where high load currents or a short circuit
occurs, thus reducing the common mode signals (V+,
V-) typically below 2.2V, the comparator will default to
the asserted state. This can eliminate a closed loop
system ‘latch-up’ condition, allowing the controller to
remove the applied power.
Stability
To ensure stable operation of the ZXCT1030, it is
recommended a decoupling capacitor is placed across
the V
CC
and ground connections. A ceramic 10 F will
be adequate.
Pin Name
Pin Function
Vcc
Supply voltage
Sense-
Negative sense input
Sense+
Positive sense input
GND
Ground
Comp_in
Comparator input, usually a
ratio of the reference or other
control signal.
Vref_out
Reference output
Vout
Current Monitor output
voltage
Comp_out
Open collector comparator
output
ZXCT1030
S E M IC O N D U C T O R S
PROVISIONAL ISSUE J - MAY 2004
5
Vcc
Sense-
Sense+
GND
Comp_out
Vout
Vref_out
Comp_in
1
2
3
4
8
7
6
5
PIN CONNECTIONS
MSOP8
FIGURE 1.0
External resistor for reference level
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| ZXCT1030X8TA | HIGH-SIDE CURRENT MONITOR WITH COMPARATOR |
| ZXCT1030X8TC | HIGH-SIDE CURRENT MONITOR WITH COMPARATOR |
| ZXF103 | VARIABLE Q FILTER |
| ZXF103Q16 | Circular Connector; No. of Contacts:32; Series:; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:18; Circular Contact Gender:Socket; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:18-32 RoHS Compliant: No |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ZXCT1030_07 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:High-side current monitor with comparator |
| ZXCT1030N8TA | 功能描述:電流和電力監(jiān)控器、調節(jié)器 Current Monitor w/Ref Comparator RoHS:否 制造商:STMicroelectronics 產品: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 |
| ZXCT1030X8TA | 功能描述:電流和電力監(jiān)控器、調節(jié)器 Crnt Mntr w ref-comp RoHS:否 制造商:STMicroelectronics 產品: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 |
| ZXCT1030X8TC | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:HIGH-SIDE CURRENT MONITOR WITH COMPARATOR |
| ZXCT1032 | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:High-side inrush controller and electronic fuse |
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