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LTC4090_15

更新时间： 2024-01-10 19:31:50
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
30页 852K
描述
USB Power Manager with 2A High Voltage Bat-Track Buck Regulator

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中文翻译

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LTC4090_15 数据手册

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LTC4090/LTC4090-5  
USB Power Manager with  
2A High Voltage Bat-Track  
Buck Regulator  
FEATURES  
DESCRIPTION  
The LTC®4090/LTC4090-5 are USB power managers plus  
highvoltageLi-Ion/Polymerbatterychargers. Thedevices  
control the total current used by the USB peripheral for  
operation and battery charging. Battery charge current  
is automatically reduced such that the sum of the load  
current and the charge current does not exceed the pro-  
grammed input current limit. The LTC4090/LTC4090-5  
also accommodate high voltage power supplies, such as  
12V AC/DC wall adapters, Firewire, or automotive power.  
n
Seamless Transition Between Power Sources:  
Li-Ion Battery, USB, and 6V to 36V Supply (60V Max)  
n
2A Output High Voltage Buck Regulator with  
Bat-Track™ Adaptive Output Control (LTC4090)  
Internal 215mW Ideal Diode Plus Optional  
n
External Ideal Diode Controller Provides Low Loss  
PowerPath™ When External Supply/USB Not Present  
n
Load Dependent Charging from USB Input  
Guarantees Current Compliance  
Full Featured Li-Ion Battery Charger  
n
The LTC4090 provides a Bat-Track adaptive output that  
tracksthebatteryvoltageforhighefficiencychargingfrom  
the high voltage input. The LTC4090-5 provides a fixed 5V  
output from the high voltage input to charge single-cell  
Li-Ionbatteries.Thechargecurrentisprogrammableandan  
end-of-charge status output (CHRG) indicates full charge.  
Alsofeaturedareprogrammabletotalchargetime, anNTC  
thermistorinputusedtomonitorbatterytemperaturewhile  
charging and automatic recharging of the battery.  
n
1.5A Maximum Charge Current with Thermal Limiting  
n
NTC Thermistor Input for Temperature Qualified  
Charging  
n
Tiny (3mm × 6mm × 0.75mm) 22-Pin DFN Package  
APPLICATIONS  
n
HDD-Based Media Players  
n
Personal Navigation Devices  
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks  
and Bat-Track, PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All  
other trademarks are the property of their respective owners.  
n
Other USB-Based Handheld Products  
Automotive Accessories  
n
TYPICAL APPLICATION  
LTC4090/LTC4090-5 High Voltage  
Battery Charger Efficiency  
0.47µF  
SW  
6.8µH  
BOOST  
HIGH (7.5V-36V)  
VOLTAGE INPUT  
HVIN  
22µF  
90  
80  
70  
60  
50  
40  
30  
20  
FIGURE 12 SCHEMATIC  
WITH R = 52k  
1µF  
LTC4090  
PROG  
HVOUT  
5V WALL  
ADAPTER  
NO OUTPUT LOAD  
IN  
HVPR  
4.7µF  
USB  
LTC4090  
1k  
LTC4090-5  
V
C
OUT  
LOAD  
4.7µF  
TIMER  
BAT  
R
CLPROG  
2k  
GND PROG  
T
59k  
HVIN = 8V  
HVIN = 12V  
HVIN = 24V  
HVIN = 36V  
+
40.2k  
100k  
270pF  
0.1µF  
Li-Ion BATTERY  
V
(TYP)  
+ 0.3V  
5V  
5V  
AVAILABLE INPUT  
HV INPUT (LTC4090)  
HV INPUT (LTC4090-5)  
USB ONLY  
OUT  
2.0  
2.5  
3.0  
V
3.5  
(V)  
4.0  
4.5  
V
BAT  
BAT  
4090 TA01b  
V
BAT  
BAT ONLY  
4090 TAO1  
4090fd  
1
For more information www.linear.com/LTC4090  
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