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| 型号： | LT3652EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/26页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER 12-DFN |
| 产品培训模块： | LT3652 Multi-Chemistry Battery Charger for Solar Power |
| 特色产品： | LT3652 2A Battery Charger Energy Harvesting Power Products |
| 标准包装： | 121 |
| 功能： | 充电管理，太阳能 |
| 电池化学： | 铅酸，LiFePO4，锂离子，锂聚合物，镍镉，镍氢 |
| 电源电压： | 4.95 V ~ 32 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN-EP（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 1340 (CN2011-ZH PDF) |
| 配用： | DC1568A-ND - BOARD BATTERY CHARGER SOLAR PWR |
LT3652
APPLICATIONS INFORMATION
ripple current in the charger, so it must have an adequate
ripple current rating. RMS ripple current (I CVIN(RMS) ) is:
I CVIN(RMS) ? I CHG(MAX) ? (V BAT / V IN )?([V IN / V BAT ] – 1) 1/2 ,
where I CHG(MAX) is the maximum average charge current
BOOST Supply
The BOOST bootstrapped supply rail drives the internal
switch and facilitates saturation of the switch transistor.
Operating range of the BOOST pin is 0V to 8.5V, as refer-
(100mV/R SENSE ). The above relation has a maximum at
V IN = 2 ? V BAT , where:
I CVIN(RMS) = I CHG(MAX) /2.
LT3652
SW
BOOST
SENSE
R SENSE
BAT
3652 F01
The simple worst-case of ? ? I CHG(MAX) is commonly
used for design.
Bulk capacitance is a function of desired input ripple volt-
age ( ? V IN ), and follows the relation:
C IN(BULK) = I CHG(MAX) ? (V BAT /V IN ) / ? V IN (μF)
Input ripple voltages above 0.1V are not recommended.
10μF is typically adequate for most charger applica-
tions.
Charge Current Programming
The LT3652 charger is configurable to charge at average
currents as high as 2A. Maximum charge current is set by
choosing an inductor sense resistor (R SENSE ) such that
the desired maximum average current through that sense
resistor creates a 100mV drop, or:
Figure 1. Programming Maximum Charge
Current Using R SENSE
enced to the SW pin. Connect a 1μF or greater capacitor
from the BOOST pin to the SW pin.
The voltage on the decoupling capacitor is refreshed
through a diode, with the anode connected to either the
battery output voltage or an external source, and the
cathode connected to the BOOST pin. Rate the diode
average current greater than 0.1A, and reverse voltage
greater than V IN(MAX) .
To refresh the decoupling capacitor with a rectifying diode
from the battery with battery float voltages higher than
8.4V, a >100mA Zener diode can be put in series with
the rectifying diode to prevent exceeding the BOOST pin
operating voltage range.
R SENSE = 0.1 / I CHG(MAX)
where I CHG(MAX) is the maximum average charge current.
A 2A charger, for example, would use a 0.05Ω sense
resistor.
3652fd
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3652EDDTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
| LT3652EMSE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
| LT3652EMSE#PBF | 功能描述:IC BATTERY CHARGER SOLAR 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT3652EMSE#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER FOR SOLAR POWER 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 2A, MSOP-12 |
| LT3652EMSE#TRPBF | 功能描述:IC BATT CHARGER SOLAR 2A 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
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