- 您现在的位置：买卖IC网 > PDF目录44985 > LT3652EDD#TRPBF (LINEAR TECHNOLOGY CORP) 3 A BATTERY CHARGE CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO12 PDF资料下载
参数资料
| 型号： | LT3652EDD#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A BATTERY CHARGE CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO12 |
| 封装： | 3 X 3 MM, LEAD FREE, PLASTIC, DFN-12 |
| 文件页数： | 24/26页 |
| 文件大小： | 253K |
| 代理商： | LT3652EDD#TRPBF |
LT3652
7
3652fc
PIN FUNCTIONS
VIN (Pin 1): Charger Input Supply. VIN operating range
is 4.95V to 32V. 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.
VIN_REG (Pin 2): Input Voltage Regulation Reference.
Maximum 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 VINvoltage.
This is typically used to program the peak power voltage
for a solar panel. The LT3652 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 14.4V.
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.
相关PDF资料 |
PDF描述 |
|---|---|
| LT3652HVEDD#PBF | BATTERY CHARGE CONTROLLER, PDSO12 |
| LT3652HVEMSE#TRPBF | BATTERY CHARGE CONTROLLER, PDSO12 |
| LT3652HVEDD#TRPBF | BATTERY CHARGE CONTROLLER, PDSO12 |
| LT3663EMS8E-3.3#PBF | 2.5 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT3663IMS8E-3.3#PBF | 2.5 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3652EMSE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
| LT3652EMSE#PBF | 功能描述:IC BATTERY CHARGER SOLAR 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT3652EMSE#PBF | 制造商:Linear Technology 功能描述:BATTERY CHARGER FOR SOLAR POWER 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 2A, MSOP-12 |
| LT3652EMSE#TRPBF | 功能描述:IC BATT CHARGER SOLAR 2A 12MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LT3652EMSEPBF | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion 2A 4.2V MSOP12EP |
发布紧急采购，3分钟左右您将得到回复。