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| 型号： | LT3651EUHE-4.2#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PQCC36 |
| 封装： | 5 X 6 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-36 |
| 文件页数： | 1/22页 |
| 文件大小： | 213K |
| 代理商： | LT3651EUHE-4.2#PBF |
LT3651-4.1/LT3651-4.2
1
365142fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Monolithic 4A High Voltage
1 Cell Li-Ion Battery Charger
n Industrial Handheld Instruments
n 12V to 24V Automotive and Heavy Equipment
n Desktop Cradle Chargers
n Notebook Computers
6.5V to 32V Single Cell 4A Charger
Efficiency, Power Loss vs VIN
n Wide Input Voltage Range: 4.8V to 32V
(40V Absolute Maximum)
n Programmable Charge Current Up to 4A
n Selectable C/10 or Onboard Timer Termination
n Dynamic Charge Rate Programming/Soft-Start
n Programmable Input Current Limit
n 0.5% Float Voltage Accuracy
n 7.5% Charge Current Accuracy
n 4% C/10 Detection Accuracy
n NTC Resistor Temperature Monitor
n Auto-Recharge at 97.5% Float Voltage
n Auto-Precondition <70% Float Voltage
n Bad Battery Detection with Auto-Reset
n Average Current Mode, Synchronous Switcher
n User Programmable Frequency
n Low Profile (0.75mm) 5mm
× 6mm 36-Pin
QFN Package
The LT
3651 is a 1 cell 4A Li-Ion/Polymer battery charger
that operates over a 4.8V to 32V input voltage range. An
efficient monolithic average current mode synchronous
switching regulator provides constant current, constant
voltage charging with programmable maximum charge
current. A charging cycle starts with battery insertion
or when the battery voltage drops 2.5% below the float
voltage. Charger termination is selectable as either charge
current or internal safety timer timeout. Charge current
termination occurs when the charge current falls to one-
tenth the programmed maximum current (C/10). Timer
based termination is typically set to three hours and is
user programmable (charging continues below C/10 until
timeout). Once charging is terminated, the LT3651 supply
current drops to 85μA into a standby mode.
The LT3651 offers several safety features. A discharged
battery is preconditioned with a small trickle charge and
generates a signal if unresponsive. A thermistor monitors
battery temperature, halting charging if out of range. Ex-
cessive die temperature reduces charge current. Charge
current is also reduced to maintain constant input current
to prevent excessive input loading.
The LT3651 is available in a 5mm
× 6mm 36-pin QFN
package.
RT
TIMER
SW
BOOST
SENSE
BAT
ILIM RNG/SS GND
NTC
CLP
CLN
1μF
100μF
BATTERY
365142 TA01a
6.5μH
WRTH 744314650
TO
SYSTEM
LOAD
24mΩ
301k
VIN
6.5V TO
32V
1N5819
LT3651-4.2
VIN
22μF
+
FAULT
CHRG
ACPR
SHDN
10V
Si7611DN
100k
VIN (V)
5
EFFICIENCY
(%)
POWER
LOSS
(W)
83
84
85
86
15
25
365142 TA01b
82
81
80
3.2
3.6
4.0
4.4
2.8
2.4
2.0
10
20
30
VBAT = 3.9
EFF
PLOSS
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3651EUHE-8.2#PBF | 制造商:Linear Technology 功能描述:IC CHRG MGMT LI-ION/LI-POL 36QFN 制造商:Linear Technology 功能描述:DP-Battery Charger, Monolithic 4A High Voltage Li-Ion Battery Charger |
| LT3651EUHE-8.2#TRPBF | 制造商:Linear Technology 功能描述:IC CHRG MGMT LI-ION/LI-POL 36QFN 制造商:Linear Technology 功能描述:DP-Battery Charger, Monolithic 4A High Voltage Li-Ion Battery Charger |
| LT3651EUHE-8.4#PBF | 制造商:Linear Technology 功能描述:IC CHRG MGMT LI-ION/LI-POL 36QFN 制造商:Linear Technology 功能描述:DP-Battery Charger, Monolithic 4A High Voltage Li-Ion Battery Charger |
| LT3651EUHE-8.4#TRPBF | 制造商:Linear Technology 功能描述:IC CHRG MGMT LI-ION/LI-POL 36QFN 制造商:Linear Technology 功能描述:DP-Battery Charger, Monolithic 4A High Voltage Li-Ion Battery Charger |
| LT3651IUHE-4.1#PBF | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion/Li-Pol 4000mA 4.1V 36-Pin QFN EP 制造商:Linear Technology 功能描述:IC CHRG MGMT LI-ION/LI-POL 36QFN 制造商:Linear Technology 功能描述:DP-Battery Charger, Monolithic 4A High Voltage Li-Ion Battery Charger |
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