參數(shù)資料
型號: LTC1730-4
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: Lithium-Ion Battery Pulse Charger(4.1V鋰離子電池脈沖充電器)
中文描述: 1 A BATTERY CHARGE CONTROLLER, PDSO16
封裝: SSOP-16
文件頁數(shù): 5/12頁
文件大?。?/td> 166K
代理商: LTC1730-4
LTC1730-4/LTC1730-4.2
5
BLOCK DIAGRA
W
+
+
LOGIC
RECHRG
ON
C6
C4
40mV
+
+
C7
C3
+
+
C8
121mV
C2
+
C1
OSCILLATOR
CLK
FAULT
V
MIN
I
MAX
STOP
C/10
SHDN
V
BAT
HOT
V
MAX
COLD
ACPR
+
C9
3.8V
1.21V
R4
R5
+
+
C5
100mV
+
R3
R2
R1
40mA
GATE
BAT
N
SW
NTC/SHDN
TIMER
40
μ
A
N1
Q-PUMP
(3X)
SENSE
0.375R
0.5R
GND
1703 BD
CHRG
V
CC
FAULT
0.125R
ACPR
SEL
The LTC1730 is a complete lithium-ion battery pulse
charger with an internal 0.35
N-MOSFET switch driven
by an internal charge pump.
The charge current is set by
the current limit of the input supply (wall adapter).
An
external R
SENSE
sets the maximum allowable charge cur-
rent (I
MAX
= 0.1V/R
SENSE
) and prevents a wall adapter with
the wrong current limit from damaging the battery. If the
current limit of the input supply is above I
MAX
, the charg-
ing will be terminated immediately and will retry after
400ms (C
TIMER
= 0.1
μ
F). If the battery is disconnected
while in fast charge mode, the charge pump will be turned
off when the voltage at the BAT pin rises above 4.7V per
cell, and turned back on only when the voltage drops below
the float voltage.
A charge cycle begins when the voltage at the V
CC
pin rises
above the BAT pin by 40mV and the voltage at the NTC/
SHDN pin is in between 0.5 V
CC
and 0.875 V
CC
. The
charger will go into trickle charge mode if the battery cell
voltage is below 2.45V. The trickle charge current is preset
to 40mA and is provided by an internal current source. In
trickle mode, both the pass transistor and charge pump
are off.
OPERATIOU
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