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參數(shù)資料
| 型號： | ZXCT1010E |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 204K |
| 代理商： | ZXCT1010E |
ISSUE 1 - J UNE 2001
ZXCT1010
6
Li-Ion Charger Circuit
The above figure shows the ZXCT1010 supporting
the Benchmarq bq2954 Charge Management IC.
Most of the support components for the bq2954 are
omitted for clarity. This design also uses the Zetex
FZT789A high current Super- PNP as the switching
transistor in the DC-DC step down converter and the
FMMT451 as the drive NPN for the FZT789A. The
circuit can be configured to charge up to four Li-Ion
cells at a charge current of 1.25A. Charge can be
terminated on maximum voltage, selectable
minimum current, or maximum time out. Switching
frequency ofthePWM loopis approximately 120kHz.
100
0.2
100
FZT789A
BC81725
1k
BAS16
10μH
FMMT451
140μH
ZHCS1000
220
SNS pin
MOD pin
Charger Input
To Battery +
bq2954
5V
ZXCT1010
support components omitted for clarity
+
-
Vin
Load
Iout
APPLICATIONS INFORMATION (Continued)
Bi-Directional Current Sensing
The ZXCT1010 can be used to measure current
bi-directionally, if two devices are connected as
shown below.
If the voltage V1 is positive with respect to the
voltage V2the lowerdevice will be active, delivering
a proportional output current to Rout. Due to the
polarity of the voltage across Rsense, the upper
device will be inactive and will not contribute to the
current delivered to Rout. When V2 is more positive
than V1, current will be flowing in the opposite
direction, causing the upper device to be active
instead.
Non-linearity will be apparent at small values of
Vsense due to offset current contribution. Devices
can use separate output resistors if the current
direction is to be monitored independently.
Bi-directional Transfer Function
I
3
Load
5
Vin
4
R
I
3
Load
5
Vin
4
V
1
V
V
2
sense
out
R
out
-400
-200
Sense Voltage (mV)
0
200
400
0
1
2
3
4
5
O
Output Current v Sense Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZXCT1010E5 | 制造商:Diodes Incorporated 功能描述:CURRENT MONITOR 1010 SOT-23-5-5 制造商:Diodes Incorporated 功能描述:CURRENT MONITOR, 1010, SOT-23-5-5 制造商:Diodes Incorporated 功能描述:IC HIGHSIDE CURRENT MONITOR 10mA SOT23-5; Supply Voltage:20V; Digital IC Case Style:SOT-23; No. of Pins:5; No. of Regulated Outputs:1; Operating Temperature Min:-40C; Operating Temperature Max:85C; Filter Terminals:Surface Mount ;RoHS Compliant: Yes |
| ZXCT1010E5 | 制造商:Diodes Incorporated 功能描述:CURRENT MONITOR SMD 1010 SOT235 |
| ZXCT1010E5TA | 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Enhanced 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(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| ZXCT1010E5TA-CUT TAPE | 制造商:DIODES 功能描述:ZXCT1010 Series 300 kHz 3.5 uA 2.5 to 20 V High-Side Current Monitor - SOT-23-5 |
| ZXCT1011 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:High-side low drift current monitor |
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