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參數(shù)資料
| 型號： | LT3652HVEDD#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, PDSO12 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, DFN-12 |
| 文件頁數(shù)： | 22/24頁 |
| 文件大?。?/td> | 250K |
| 代理商： | LT3652HVEDD#TRPBF |
LT3652HV
7
3652hvf
PIN FUNCTIONS
VIN (Pin 1): Charger Input Supply. VIN operating range
is 4.95V to 34V. VIN must be 3.3V greater than the pro-
grammed output battery oat voltage (VBAT(FLT)) for reli-
able start-up. (VIN – VBAT(FLT)) ≥ 0.75V is the minimum
operating voltage, provided (VBOOST – VSW) ≥ 2V. IVIN ~
85μA after charge termination. This pin is typically con-
nected to the cathode of a blocking diode.
VIN_REG(Pin2):InputVoltageRegulationReference.Maxi-
mum charge current is reduced when this pin is below 2.7V.
Connecting a resistor divider from VIN to this pin enables
programming of minimum operational VIN voltage. This
is typically used to program the peak power voltage for a
solar panel. The LT3652HV servos the maximum charge
current required to maintain the programmed operational
VIN voltage, through maintaining the voltage on VIN_REG
at or above 2.7V. If the voltage regulation feature is not
used, connect the pin to VIN.
SHDN (Pin 3): Precision Threshold Shutdown Pin. The
enable threshold is 1.2V (rising), with 120mV of input
hysteresis. When in shutdown mode, all charging functions
are disabled. The precision threshold allows use of the
SHDN pin to incorporate UVLO functions. If the SHDN pin
is pulled below 0.4V, the IC enters a low current shutdown
mode where VIN current is reduced to 15μA. Typical SHDN
pin input bias current is 10nA. If the shutdown function
is not desired, connect the pin to VIN.
CHRG (Pin 4): Open-Collector Charger Status Output;
typically pulled up through a resistor to a reference volt-
age. This status pin can be pulled up to voltages as high
as VIN when disabled, and can sink currents up to 10mA
when enabled. During a battery charging cycle, if required
charge current is greater than 1/10 of the programmed
maximum current (C/10), CHRG is pulled low. A tem-
perature fault also causes this pin to be pulled low. After
C/10 charge termination or, if the internal timer is used
for termination and charge current is less than C/10, the
CHRG pin remains high-impedance.
FAULT (Pin 5): Open-Collector Charger Status Output;
typically pulled up through a resistor to a reference volt-
age. This status pin can be pulled up to voltages as high
as VIN when disabled, and can sink currents up to 10mA
when enabled. This pin indicates fault conditions during a
battery charging cycle. A temperature fault causes this pin
to be pulled low. If the internal timer is used for termina-
tion, a bad battery fault also causes this pin to be pulled
low. If no fault conditions exist, the FAULT pin remains
high-impedance.
TIMER (Pin 6): End-Of-Cycle Timer Programming Pin.
If a timer-based charge termination is desired, connect
a capacitor from this pin to ground. Full charge end-of-
cycle time (in hours) is programmed with this capacitor
following the equation:
tEOC = CTIMER 4.4 106
A bad battery fault is generated if the battery does not
achieve the precondition threshold voltage within one-
eighth of tEOC, or:
tPRE = CTIMER 5.5 105
A 0.68μF capacitor is typically used, which generates a
timer EOC at three hours, and a precondition limit time of
22.5 minutes. If a timer-based termination is not desired,
the timer function is disabled by connecting the TIMER
pin to ground. With the timer function disabled, charging
terminates when the charge current drops below a C/10
threshold, or ICHG(MAX)/10
VFB(Pin7):BatteryFloatVoltageFeedbackReference. The
charge function operates to achieve a nal oat voltage of
3.3V on this pin. Output battery oat voltage (VBAT(FLT))
is programmed using a resistor divider. VBAT(FLT) can be
programmed up to 18V.
The auto-restart feature initiates a new charging cycle
when the voltage at the VFB pin falls 2.5% below the oat
voltage reference.
The VFB pin input bias current is 110nA. Using a resistor
divider with an equivalent input resistance at the VFB pin
of 250k compensates for input bias current error.
Required resistor values to program desired VBAT(FLT)
follow the equations:
R1 = (VBAT(FLT) 2.5 105)/3.3
(Ω)
R2 = (R1 2.5 105)/(R1 - (2.5 105))
(Ω)
R1 is connected from BAT to VFB, and R2 is connected
from VFB to ground.
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| LT3652HVEMSE#PBF | 功能描述:IC BATTERY CHARGER 2A 12-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關(guān)文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LT3652HVEMSE#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER IC LEAD ACID LI-ION L 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, LITHIUM, 2A, MSOP12 |
| LT3652HVEMSE#TRPBF | 功能描述:IC BATTERY CHARGER 2A 12-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LT3652HVEMSE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
| LT3652HVEMSE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
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