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LTC4090-5

更新时间： 2024-01-20 10:03:56
品牌 Logo 应用领域
凌特 - Linear 稳压器电池
页数 文件大小 规格书
28页 394K
描述
USB Power Manager with 2A High Voltage Bat-Track Buck Regulator

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LTC4090-5 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  
automaticallyreducedsuchthatthesumoftheloadcurrent  
and the charge current does not exceed the programmed  
input current limit. The LTC4090/LTC4090-5 also accom-  
modate high voltage power supplies, such as 12V AC/DC  
wall adapters, FireWire, or automotive power.  
■
Seamless Transition Between Power Sources: Li-  
Ion Battery, USB, and 6V to 36V Supply (60V Max)  
■
2A Output High Voltage Buck Regulator with Bat-  
TrackTM Adaptive Output Control (LTC4090)  
Internal 215mΩ Ideal Diode Plus Optional External  
■
Ideal Diode Controller Provides Low Loss Power  
Path When External Supply / USB Not Present  
■
Load Dependent Charging from USB Input Guaran-  
tees Current Compliance  
Full Featured Li-Ion Battery Charger  
■
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-Ionbateries.Thechargecurrentisprogrammableandan  
■
1.5A Maximum Charge Current with Thermal Limiting  
■
NTC Thermistor Input for Temperature Qualified  
Charging  
■
Tiny (3mm × 6mm × 0.75mm) 22-Pin DFN Package  
⎯
⎯
⎯
⎯
end-of-charge status output (CHRG) indicates full charge.  
Alsofeaturedareprogrammabletotalchargetime, anNTC  
thermistorinputusedtomonitorbatterytemperaturewhile  
charging and automatic recharging of the battery.  
APPLICATIONS  
■
HDD-Based Media Players  
■
Personal Navigation Devices  
■
Other USB-Based Handheld Products  
Automotive Accessories  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Bat-Track is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners.  
■
TYPICAL APPLICATION  
0.47μF  
6.8μH  
LTC4090/LTC4090-5 High Voltage  
Battery Charger Efficiency  
BOOST  
SW  
HIGH (6V-36V)  
HVIN  
IN  
22μF  
VOLTAGE INPUT  
1μF  
90  
80  
70  
60  
50  
40  
30  
20  
HVOUT  
5V WALL  
ADAPTER  
FIGURE 12 SCHEMATIC  
WITH R = 52k  
LTC4090  
PROG  
HVPR  
NO OUTPUT LOAD  
4.7μF  
USB  
LTC4090  
1k  
V
C
OUT  
LOAD  
LTC4090-5  
4.7μF  
TIMER  
BAT  
R
CLPROG  
2k  
GND PROG  
T
59k  
+
40.2k  
100k  
270pF  
0.1μF  
Li-Ion BATTERY  
HVIN = 8V  
HVIN = 12V  
HVIN = 24V  
HVIN = 36V  
V
(TYP)  
+ 0.3V  
5V  
5V  
AVAILABLE INPUT  
HV INPUT (LTC4090)  
HV INPUT (LTC4090-5)  
USB ONLY  
OUT  
V
BAT  
2.0  
2.5  
3.0  
3.5  
(V)  
4.0  
4.5  
V
BAT  
V
BAT ONLY  
BAT  
4090 TAO1  
4090 TA01b  
4090fa  
1
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