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LTC4150CMSTRPBF

更新时间： 2024-01-05 08:59:57

品牌	Logo	应用领域
凌特 - Linear		电池仪表
页数	文件大小	规格书
14页	167K
描述
Coulomb Counter/ Battery Gas Gauge

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LTC4150CMSTRPBF 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
零件包装代码：	MSOP	包装说明：	TSSOP, TSSOP10,.19,20
针数：	10	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.03	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	S-PDSO-G10	JESD-609代码：	e3
长度：	3 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	10
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP10,.19,20	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	2.7/8.5 V	认证状态：	Not Qualified
座面最大高度：	1.1 mm	子类别：	Power Management Circuits
最大供电电流 (Isup)：	0.14 mA	最大供电电压 (Vsup)：	8.5 V
最小供电电压 (Vsup)：	2.7 V	标称供电电压 (Vsup)：	4 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	3 mm	Base Number Matches：	1

LTC4150CMSTRPBF 数据手册

LTC4150

OPERATION

Charge is the time integral of current. The LTC4150 mea-

suresbatterycurrentbymonitoringthevoltagedeveloped

acrossasenseresistorandthenintegratesthisinformation

inseveralstagestoinfercharge.TheBlockDiagramshows

the stages described below. As each unit of charge passes

into or out of the battery, the LTC4150 INT pin interrupts

an external microcontroller and the POL pin reports the

polarity of the charge unit. The external microcontroller

then resets INT with the CLR input in preparation for the

next interrupt issued by the LTC4150. The value of each

charge unit is determined by the sense resistor value and

CHARGE COUNTING

First, the current measurement is ﬁltered by capacitor C

–

connected across pins C and C . This averages fast

changes in current arising from ripple, noise and spikes

in the load or charging current.

Second, the ﬁlter’s output is applied to an integrator with

the ampliﬁer and 100pF capacitor at its core. When the

integratoroutputrampstoREFHIorREFLOlevels,switches

S1 and S2 reverse the ramp direction. By observing the

condition of S1 and S2 and the ramp direction, polarity is

determined. The integrating interval is trimmed to 600μs

at 50mV full-scale sense voltage.

the sense voltage to interrupt frequency gain G of the

LTC4150.

Third, a counter is incremented or decremented every

time the integrator changes ramp direction. The counter

effectively increases integration time by a factor of 1024,

greatly reducing microcontroller overhead required to

service interrupts from the LTC4150.

Power-On and Start-Up Initialization

When power is ﬁrst applied to the LTC4150, all internal

circuitryisreset.Afteraninitializationinterval,theLTC4150

begins counting charge. This interval depends on V and

the voltage across the sense resistor but will be at least

5ms. It may take an additional 80ms for the LTC4150 to

accuratelytrackthesensevoltage.Aninternalundervoltage

At each counter under or overﬂow, the INT output latches

low, ﬂagging a microcontroller. Simultaneously, the POL

output is latched to indicate the polarity of the observed

charge. With this information, the microcontroller can

total the charge over long periods of time, developing

an accurate estimate of the battery’s condition. Once the

interruptisrecognized,themicrocontrollerresetsINTwith

a low going pulse on CLR and awaits the next interrupt.

Alternatively, INT can drive CLR.

lockout circuit monitors V and resets all circuitry when

falls below 2.5V.

Asserting SHDN low also resets the LTC4150’s internal

circuitry and reduces the supply current to 1.5μA. In this

condition, POL and INT outputs are high impedance. The

LTC4150 resumes counting after another initialization

interval. Shutdown minimizes battery drain when both

the charger and load are off.

4150fc

1...4 5 678 9 10...14

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