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參數(shù)資料
| 型號(hào)： | X3100V28Z |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, MO-153AE, TSSOP-28 |
| 文件頁數(shù)： | 15/41頁 |
| 文件大?。?/td> | 561K |
| 代理商： | X3100V28Z |
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22
FN8110.1
January 3, 2008
The internal gain of the X3100 or X3101 current sense
voltage amplifier can be selected by using the WCNTR
Instruction to set bits CSG1 and CSG0 in the control
register (Table 14). The CSG1 and CSG0 bits select
one of four input resistors to Op Amp OP1. The feed-
back resistors remain constant. This ratio of input to
feedback resistors determines the gain. Putting exter-
nal resistors in series with the inputs reduces the gain of
the amplifier.
VCS1 and VCS2 are read at AO with respect to a DC
bias voltage of 2.5V. Therefore, the voltage range of
VCS12 and VCS21 changes depending upon the direc-
tion of current flow (i.e. battery cells are in Charge or
Discharge—Table 21).
Table 26. AO Voltage Range for VCS12 and VCS21
By calculating the difference of VCS12 and VCS21 the
offset voltage of the internal op-amp circuitry is can-
celled. This allows for the accurate calculation of cur-
rent flow into and out of the battery cells.
Pack current is calculated using the following formula:
VOLTAGE REGULATOR
The X3100 and X3101 are able to supply peripheral
devices with a regulated 5VDC±0.5% output at pin
RGO. The voltage regulator should be configured
externally as shown in Figure 8.
The non-inverting input of OP1 is fed with a high preci-
sion 5VDC supply. The voltage at the output of the
voltage regulator (VRGO) is compared to this 5V refer-
ence via the inverting input of OP1. The output of OP1
in turn drives the regulator pnp transistor (Q1). The
negative feedback at the regulator output maintains
the voltage at 5VDC±0.5% (including ripple) despite
changes in load, and differences in regulator transistors.
When power is applied to pin VCC of the X3100 or
X3101, VRGO is regulated to 5VDC±10% for a nominal
time of TOC+2ms. During this time period, VRGO is
“tuned” to attain a final value of 5VDC±0.5% (Figure ).
The maximum current that can flow from the voltage
regulator (ILMT) is controlled by the current limiting
resistor (RLMT) connected between RGP and VCC.
When the voltage across VCC and RGP reaches a
nominal 2.5V (i.e. the threshold voltage for the FET), Q2
switches ON, shorting VCC to the base of Q1. Since
the base voltage of Q1 is now higher than the emitter
voltage, Q1 switches OFF, and hence the supply current
goes to zero.
27. In order to protect the voltage regulator circuitry
from damage in case of a short-circuit, RLMT ≥ 10Ω
should always be used.
Table 27. Typical Values for RLMT and ILMT
When choosing the value of RLMT, the drive limitations
of the PNP transistor used should also be taken into
consideration. The transistor should have a gain of at
least 100 to support an output current of 250mA.
Figure 8. Voltage Regulator Operation
4KBIT EEPROM MEMORY
The X3100 and X3101 contain a CMOS 4k-bit serial
EEPROM, internally organized as 512 x 8 bits. This
memory is accessible via the SPI port, and features
the IDLock function.
AO
Cell State
AO Voltage Range
VCS12
Charge
2.5V
≤ AO ≤ 5.0V
VCS12
Discharge
0V
≤ AO ≤ 2.5V
VCS21
Charge
0V
≤ AO ≤ 2.5V
VCS21
Discharge
2.5V
≤ AO ≤ 5.0V
Pack Current
VCS12 VCS21
–
()
2
() gain setting
()(current sense resistor)
----------------------------------------------------------------------------------------------------------
=
RLMT
Voltage Regulator Current Limit (ILMT)
10
Ω
250mA ± 50% (Typical)
25
Ω
100mA ± 50% (Typical)
50
Ω
50mA ± 50% (Typical)
VCC
RGC
RGP
RGO
Voltage
Reference
_
+
To Internal Voltage
Regulating Circuitry
Regulated
5VDC Output
RLMT
Q1
Un-Regulated
Input
Voltage
ILMT
Precision
X3100/X3101
OP1
5VDC
Q2
Tuning
VRGO
0.1
F
X3100, X3101
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X3101 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:3 or 4 Cell Li-Ion Battery Protection and Monitor IC |
| X3101PT-V | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:3 or 4 Cell Li-Ion Battery Protection and Monitor IC |
| X3101V28 | 功能描述:IC PROTECT/MONITOR 3CELL 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| X3101V28C7988 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| X3101V28T1 | 功能描述:IC PROTECT/MONITOR 3CELL 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
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