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參數(shù)資料
| 型號(hào)： | LTC4075HVXEDD#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 170K |
| 代理商： | LTC4075HVXEDD#TR |
LTC4075HVX
7
4075hvxf
PIN FUNCTIONS
USBIN (Pin 1): USB Input Supply Pin. This input provides
power to the battery charger assuming a voltage greater
than VUVUSB and less than VOVUSB is present (typically
3.95V to 6V respectively). However, the DCIN input will take
priority if a voltage greater than VUVDC and less than VOVDC
is present at DCIN (typically 4.15V to 6V respectively). The
USBIN input allows charge currents up to 850mA. This
pin should be bypassed with a 1μF capacitor.
IUSB (Pin 2): Charge Current Program for USB Power.
The charge current is set by connecting a resistor, RIUSB,
to ground. When charging in constant-current mode, this
pin servos to 1V. The voltage on this pin can be used to
measure the battery current delivered from the USB input
using the following formula:
I
V
R
BAT
IUSB
=
1000
ITERM (Pin 3): Termination Current Threshold Program.
The termination current threshold, ITERMINATE, is set by
connecting a resistor, RITERM, to ground. ITERMINATE is set
by the following formula:
I
V
R
TERMINATE
ITERM
=
100
When the battery current, IBAT, falls below the termination
threshold, charging stops and the CHRG output becomes
high impedance. This pin is internally clamped to approxi-
mately 1.5V. Driving this pin to voltages beyond the clamp
voltage should be avoided.
PWR (Pin 4): Open-Drain Power Supply Status Output.
When the DCIN or USBIN pin voltage is valid to begin charg-
ing (i.e. when the supply is greater than the undervoltage
lockout threshold, less than the overvoltage lockout thresh-
old and at least 120mV above the battery terminal), the
PWR pin is pulled low by an internal N-channel MOSFET.
Otherwise PWR is high impedance. This output is capable
of driving an LED (see Table 1 for more detail).
CHRG (Pin 5): Open-Drain Charge Status Output. When
the LTC4075HVX is charging, the CHRG pin is pulled low
by an internal N-channel MOSFET. When the charge cycle
is completed, CHRG becomes high impedance. This output
is capable of driving an LED.
ENABLE (Pin 6): Enable Input. When the LTC4075HVX is
charging from the DCIN source, a logic low on this pin
enables the charger. When the LTC4075HVX is charging
from the USBIN source, a logic high on this pin enables
the charger. If this input is left oating, an internal 2MΩ
pull-down resistor defaults the LTC4075HVX to charge
when a wall adapter is applied and to shut down if only
the USB source is applied.
USBPWR (Pin 7): Open-Drain USB Power Status Output.
When the voltage on the USBIN pin is sufcient to begin
charging and there is insufcient power at DCIN, the USB-
PWR pin is high impedance. In all other cases, this pin
is pulled low by an internal N-channel MOSFET, provided
that there is power present at either DCIN, USBIN, or BAT
inputs. This output is capable of driving an LED.
IDC (Pin 8): Charge Current Program for Wall Adapter
Power. The charge current is set by connecting a resis-
tor, RIDC, to ground. When charging in constant-current
mode, this pin servos to 1V. The voltage on this pin can
be used to measure the battery current delivered from the
DC input using the following formula:
I
V
R
BAT
IDC
=
1000
BAT (Pin 9): Battery Charger Output. This pin provides
charge current to the battery and regulates the nal oat
voltage to 4.2V.
DCIN (Pin 10): Wall Adapter Input Supply Pin. This input
provides power to the battery charger assuming a voltage
greater than VUVDC and less than VOVDC is present (typi-
cally 4.15V to 6V respectively). A valid voltage on the DCIN
input will always take priority over the USBIN input. The
DCIN input allows charge currents up to 950mA. This pin
should be bypassed with a 1μF capacitor.
Exposed Pad (Pin 11): GND. The exposed backside of the
package is ground and must be soldered to PC board ground
for electrical connection and maximum heat transfer.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4075X | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Input USB/AC Adapter Standalone Li-Ion Battery Chargers |
| LTC4075XEDD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Input USB/AC Adapter Standalone Li-Ion Battery Chargers |
| LTC4076 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Input Standalone Li-Ion Battery Charger |
| LTC4076EDD | 功能描述:IC CHARG BATT LI-ON USB 10DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):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(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4076EDD#PBF | 功能描述:IC CHARG BATT LI-ON USB 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.4 V ~ 2.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名稱:296-21665-2 |
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