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LTC4120EUD-4.2#PBF PDF预览

LTC4120EUD-4.2#PBF

更新时间： 2024-02-08 06:07:02
品牌 Logo 应用领域
凌特 - Linear 电池无线
页数 文件大小 规格书
32页 858K
描述
LTC4120/LTC4120-4.2 - Wireless Power Receiver and 400mA Buck Battery Charger; Package: QFN; Pins: 16; Temperature Range: -40°C to 85°C

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LTC4120EUD-4.2#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：,
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：8.43模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-609代码：e3峰值回流温度（摄氏度）：NOT SPECIFIED
端子面层：Matte Tin (Sn)处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LTC4120EUD-4.2#PBF 数据手册

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LTC4120/LTC4120-4.2  
Wireless Power Receiver and  
400mA Buck Battery Charger  
FEATURES  
DESCRIPTION  
The LTC®4120 is a constant-current/constant-voltage wire-  
less receiver and battery charger. An external program-  
ming resistor sets the charge current up to 400mA. The  
LTC4120-4.2 is suitable for charging Li-Ion/Polymer bat-  
teries,whiletheprogrammablefloatvoltageoftheLTC4120  
accommodates several battery chemistries. The LTC4120  
usesaDynamicHarmonizationControl(DHC)techniquethat  
allowshighefficiencycontactlesschargingacrossanairgap.  
n
Dynamic Harmonization Control Optimizes  
Wireless Charging Over a Wide Coupling Range  
n
Wide Input Voltage Range (12.5V to 40V)  
n
Adjustable Float Voltage (3.5V to 11V)  
n
n
Fixed 4.2V Float Voltage Option (LTC4120-4.2)  
50mA to 400mA Charge Current Programmed with a  
Single Resistor  
n
n
n
n
n
1% Feedback Voltage Accuracy  
Programmable 5% Accurate Charge Current  
No Microprocessor Required  
The LTC4120 regulates its input voltage via the DHC pin.  
This technique modulates the resonant frequency of a  
receiver tank to automatically adjust the power received  
as well as the power transmitted to provide an efficient  
solution for wirelessly charging battery-powered devices.  
No Transformer Core  
Thermally Enhanced, Low Profile 16-Lead  
(3mm × 3mm × 0.75mm) QFN Package  
Wireless charging with the LTC4120 provides a method  
to power devices in harsh environments without requiring  
expensive failure-prone connectors. This allows products  
to be charged while locked within sealed enclosures, or  
in moving or rotating equipment, or where cleanliness or  
sanitation is critical.  
APPLICATIONS  
n
Handheld Instruments  
n
Industrial/Military Sensors and Devices  
n
Harsh Environments  
n
Portable Medical Devices  
n
This full featured battery charger includes accurate RUN  
pinthreshold,lowvoltagebatterypreconditioningandbad  
battery fault detection, timer termination, auto-recharge,  
and NTC temperature qualified charging. The FAULT pin  
providesanindicationofbadbatteryortemperaturefaults.  
Physically Small Devices  
n
Electrically Isolated Devices  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and AutoResonant is a trademark of Linear Technology Corporation. All other trademarks are  
the property of their respective owners.  
Once charging is terminated, the LTC4120 signals end-of-  
charge via the CHRG pin, and enters a low current sleep  
mode. An auto-restart feature starts a new charging cycle  
if the battery voltage drops by 2.2%.  
TYPICAL APPLICATION  
Wireless Rx Voltage/Charge Current vs Spacing  
26.7nF  
400  
333  
267  
200  
133  
67  
40  
35  
30  
25  
IN  
RUN  
INTV  
CC  
FREQ  
BOOST  
I
CHARGE  
MAX  
2.2µF  
22nF 33µH  
10µF  
V
IN  
LTC4120  
6.5nF  
47µH  
SW  
NOT  
Tx CIRCUITRY  
5µH  
DHC  
CHGSNS  
NTC  
CHARGING  
FAULT  
CHRG  
BAT  
20  
15  
10  
1.01M  
1.35M  
+
Li-Ion  
4.2V  
T
CHARGING  
FB  
GND PROG FBG  
3.01k  
22µF  
0
0.4 0.6  
0.8 1.0 1.2  
SPACING (cm)  
1.4  
1.6 1.8  
4120 TA01a  
4120 TA01b  
4120ff  
1
For more information www.linear.com/LTC4120  
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