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參數(shù)資料
| 型號： | LTC4085EDE-3#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PDSO14 |
| 封裝： | 4 X 3 MM, PLASTIC, MO-229, DFN-14 |
| 文件頁數(shù)： | 23/24頁 |
| 文件大小： | 275K |
| 代理商： | LTC4085EDE-3#TRPBF |
LTC4085-3
8
40853f
IN (Pin 1): Input Supply. Connect to USB supply, VBUS.
Input current to this pin is limited to either 20% or 100%
of the current programmed by the CLPROG pin as deter-
mined by the state of the HPWR pin. Charge current (to
BAT pin) supplied through the input is set to the current
programmed by the PROG pin but will be limited by the
input current limit if charge current is set greater than the
input current limit.
OUT (Pin 2): Voltage Output. This pin is used to provide
controlled power to a USB device from either USB VBUS
(IN) or the battery (BAT) when the USB is not present.
This pin can also be used as an input for battery charging
when the USB is not present and a wall adapter is applied
to this pin. OUT should be bypassed with at least 4.7μF
to GND.
CLPROG (Pin 3): Current Limit Program and Input Cur-
rent Monitor. Connecting a resistor, RCLPROG, to ground
programs the input to output current limit. The current
limit is programmed as follows:
ICL(A) =
1000V
RCLPROG
In USB applications the resistor RCLPROG should be set
to no less than 2.1k.
The voltage on the CLPROG pin is always proportional to
the current owing through the IN to OUT power path.
This current can be calculated as follows:
IIN(A) =
VCLPROG
RCLPROG
1000
HPWR (Pin 4): High Power Select. This logic input is used
to control the input current limit. A voltage greater than
1.2V on the pin will set the input current limit to 100% of
the current programmed by the CLPROG pin. A voltage
less than 0.4V on the pin will set the input current limit
to 20% of the current programmed by the CLPROG pin.
A 2μA pull-down is internally applied to this pin to ensure
it is low at power up when the pin is not being driven
externally.
SUSP (Pin 5): Suspend Mode Input. Pulling this pin above
1.2V will disable the power path from IN to OUT. The sup-
ply current from IN will be reduced to comply with the
USB specication for suspend mode. Both the ability to
charge the battery from OUT and the ideal diode function
(from BAT to OUT) will remain active. Suspend mode will
reset the charge timer if VOUT is less than VBAT while in
suspend mode. If VOUT is kept greater than VBAT, such as
when a wall adapter is present, the charge timer will not
be reset when the part is put in suspend. A 2μA pull-down
is internally applied to this pin to ensure it is low at power
up when the pin is not being driven externally.
TIMER (Pin 6): Timer Capacitor. Placing a capacitor, CTIMER,
to GND sets the timer period. The timer period is:
tTIMER(Hours) =
CTIMER RPROG 3Hours
0.1μF 100k
Charge time is increased if charge current is reduced
due to undervoltage current limit, load current, thermal
regulation and current limit selection (HPWR).
Shorting the TIMER pin to GND disables the battery
charging functions.
PIN FUNCTIONS
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LTC4085EDE-4#PBF | 功能描述:IC USB POWER MANAGER 14DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:* 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4085EDE-4#TRPBF | 功能描述:IC USB POWER MANAGER 14DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:* 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4085EDEPBF | 制造商:Linear Technology 功能描述:Li-Ion Charger + USB Power Mgr LTC4085 |
| LTC4085EDE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:USB Power Manager with Ideal Diode Controller and Li-Ion Charger |
| LTC4085EDE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:USB Power Manager with Ideal Diode Controller and Li-Ion Charger |
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