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参数资料
| 型号： | ZXCT1009T8TA |
| 厂商： | Diodes Inc |
| 文件页数： | 5/8页 |
| 文件大小： | 198K |
| 描述： | IC CURRENT MONITOR 1% SM8 |
| 产品培训模块： | Designing with Zetex Current Monitors |
| 标准包装： | 1 |
| 功能： | 电流监控器 |
| 检测方法： | 高端 |
| 精确度： | ±1% |
| 输入电压： | 2.5 V ~ 20 V |
| 电流 - 输出： | 10.2mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-223-8 |
| 供应商设备封装： | SM8 |
| 包装： | 标准包装 |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXCT1009T8DKR |
ZXCT1009
HIGH-SIDE CURRENT MONITOR
ZXCT1009
Document number: DS33441 Rev. 12 - 2
5 of 8
www.diodes.com
April 2011
?Diodes Incorporated
Application Information (cont.)
Li-Ion Charger Circuit
The above figure shows the ZXCT1009 supporting the
Benchmarq bq2954 Charge Management IC. Most of the
support components for the bq2954 are omitted for clarity.
This design also uses the Diodes 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 of the
PWM loop is approximately 120kHz.
The ZXCT1009 is intended as a direct functional
replacement for the ZDS1009, which is featured in a
complete design from Unitrode/Texas Instruments on the
Li-Ion charger circuit shown above. Reference:
DVS2954S1H Li-Ion Charger Development System.
Transient Protection
n additional resistor, R
LIM
can be added in series with R
OUT
(as below), to limit the current from I
OUT
. Any circuit
connected to V
OUT
will be protected from input voltage
transients. This can be of particular use in automotive
applications where load dump and other common transients
need to be considered.
ZXCT1009 with additional current limiting Resistor R
LIM
.
ssuming the worst case condition of V
OUT
= 0V; providing a
low impedance to a transient, the minimum value of R
LIM
is
given by:-
R
LIM(min)
= (V
PK
V
MAX
)/I
PK
V
PK
= Peak transient voltage to be withstood
V
MAX
= Maximum working voltage = 20V
I
PK
= Peak output current = 40mA
The maximum value of R
LIM
is set by V
IN(MIN)
, V
OUT(MAX)
and
the dropout voltage (see transfer characteristic on page 3) of
the ZXCT1009 :-
R
LIM(MAX)
= R
OUT
[V
IN(MIN)
(V
DP
+ V
OUT(MAX)
)]/V
OUT(MAX)
V
IN(MIN)
= Minimum Supply Operating Voltage
V
DP
= Dropout Voltage
V
OUT(MAX)
= Maximum Operating Output Voltage
V
IN
R
SENSE
To load
V
OUT
R
OUT
1
2
3
ZXCT1009
V
SENSE+
V
SENSE-
I
OUT
R
LIM
V
IN
R
SENSE
To load
V
OUT
R
OUT
1
2
3
ZXCT1009
V
SENSE+
V
SENSE-
I
OUT
R
LIM
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXCT1010 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:Enhanced high-side current monitor |
| ZXCT1010_06 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:Enhanced high-side current monitor |
| ZXCT1010E | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| 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 |
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