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LTC1732EMS-8.4 Datasheet

  • LTC1732EMS-8.4

  • Lithium-Ion Linear Battery Charger Controller

  • 150.54KB

  • 12頁(yè)

  • LINER

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LTC1732-8.4
Lithium-Ion Linear
Battery Charger Controller
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
Complete Linear Charger Controller for 2-Cell
Lithium-Ion Batteries
Preset Charge Voltage with
鹵1%
Accuracy
Programmable Charge Current
C/10 Charge Current Detection Output
Programmable Charge Termination Timer
Small, Thin 10-Pin MSOP Package
Input Supply (Wall Adapter) Detection Output
8.8V to 12V Input Voltage Range
Automatic Sleep Mode When Input Supply
Is Removed (Only 10碌A(chǔ) Battery Drain)
Automatic Trickle Charging of Low Voltage Cells
Programmable for Constant-Current-Only Mode
Battery Insertion Detect and Automatic Charging
of Low-Battery
Automatic Battery Recharge
The LTC
廬
1732-8.4 is a complete constant-current/con-
stant-voltage linear charge controller for lithium-ion
(Li-Ion) batteries. Nickel-cadmium (NiCd) and nickel metal-
hydride (NiMH) batteries can also be charged with con-
stant current using external termination. Charge current
can be programmed with
鹵7%
accuracy using external
sense and program resistors. An internal resistor divider
and precision reference set the final float voltage with
鹵1%
accuracy.
When the input supply is removed, the LTC1732-8.4
automatically enters a low current sleep mode, dropping
the battery drain current to 10碌A(chǔ). An internal comparator
detects the end-of-charge (C/10) condition while a pro-
grammable timer, using an external capacitor, sets the
total charge time. Fully discharged cells are automatically
trickle charged at 10% of the programmed current until
battery voltage exceeds 4.9V.
The LTC1732-8.4 begins a new charge cycle when a
discharged battery is connected to the charger or when the
input power is applied. In additon, if the battery remains
connected to the charger and the cell voltage drops below
8.05V, a new charge cycle will begin.
The LTC1732-8.4 is available in the 10-pin MSOP package.
APPLICATIO S
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Cellular Phones
Handheld Computers
Charging Docks and Cradles
Digital Cameras and Camcorders
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
400mA 2-Cell 8.4V Li-Ion Battery Charger
V
IN
= 10V
MBRM120T3
R
SENSE
0.25鈩?/div>
Q1
Si9430DY
I
BAT
= 400mA
Typical Li-Ion Charge Cycle
CONSTANT
CURRENT
CONSTANT
VOLTAGE
BATTERY VOLTAGE
400
300
CHARGE CURRENT
200
100
0
CHRG
LED OFF
7
TIMER
STOPS
6
3.0
400mA HR BATTERY
8
9
CHARGE CURRENT (mA)
R1
1k
R2
1k
3
2
SEL
8
V
CC
SENSE
DRV
9
7
1碌F
CHRG
LTC1732-8.4
10
4
C
TIMER
0.1碌F
ACPR
TIMER
BAT
PROG
1
6
R
PROG
*
19.6k
GND
5
10碌F
+
8.4V
Li-Ion
BATTERY
0
0.5
*SHUTDOWN INVOKED BY FLOATING THE PROG PIN
1732-8.4 TA01
U
BATTERY VOLTAGE(V)
2.0
1.5
1.0
TIME (HOURS)
2.5
1732-8.4 TA01b
U
U
17328f
1

LTC1732EMS-8.4 產(chǎn)品屬性

  • 50

  • 集成電路 (IC)

  • PMIC - 電池管理

  • -

  • 充電管理

  • 鋰離子，鎳鎘，鎳氫

  • 4.5 V ~ 12 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 10-TFSOP, 10-MSOP（0.118", 3.00mm 寬）

  • 10-MSOP

  • 管件

  • LTC1732EMS8.4

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