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參數(shù)資料
| 型號： | LTC4060 |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Standalone Linear NiMH/NiCd Fast Battery Charger |
| 中文描述： | 獨(dú)立線性鎳氫/鎳鎘電池快速充電器 |
| 文件頁數(shù)： | 12/20頁 |
| 文件大小： | 195K |
| 代理商： | LTC4060 |
12
LTC4060
4060f
Table 2. LTC4060 Charging Parameters
STATE
CHEM
Precharge
Both
Fast Charge
NiCd
NiMH
CHARGE TIME LIMIT
t
MAX
t
MAX
t
MAX
T
MIN
5
°
C
5
°
C
5
°
C
T
MAX
45
°
C
55
°
C
55
°
C
I
CHRG
I
MAX
/5
I
MAX
I
MAX
TYPICAL TERMINATION CONDITION
V
CELL
≥
0.9V
–16mV Per Cell After Initial t
MAX
/12 Delay
–8mV Per Cell After Initial t
MAX
/12 Delay
Battery Chemistry Selection
The desired battery chemistry is selected by programming
the CHEM pin to the proper voltage. When wired to GND,
a set of parameters specific to charging NiMH cells is
selected. When CHEM is connected to V
CC
, charging is
optimized for NiCd cells. The various charging parameters
are detailed in Table 2.
Cell Selection
The number of series cells is selected using the SEL0 and
SEL1 pins. For one cell, both pins connect to GND. For two
cells, SEL0 connects to V
CC
and SEL1 to GND. For three
cells, SEL0 connects to GND and SEL1 to V
CC
. For four
cells, both connect to V
CC
.
Insertion and Removal of Batteries
The LTC4060 automatically senses the insertion or re-
moval of a battery by monitoring the V
CELL
pin voltage.
Either the charge current, or if not charging then an
internal pull-up current (I
BRD
), will pull V
CELL
up when the
battery is removed. When this voltage rises above 2.05V
(V
BR
) for a time greater than the battery removal event
delay shown in Table 1, the LTC4060 considers the battery
to be absent. Inserting a battery, causing V
CELL
to fall
below both V
BR
and 1.95V (V
BOV
) for a period longer than
the battery insertion event delay shown in Table 1, results
in the LTC4060 recognizing a battery present and initiates
a completely new charge cycle beginning with charge
qualification. All battery currents are inhibited while in
shutdown.
OPERATIOU
APPLICATIU
Programming Charge Current
The battery charge current is set with an external program
resistor connected from the PROG pin to GND. The for-
mula for the battery fast charge current or I
MAX
is:
W
U
U
I
I
V
R
or
R
I
MAX
PROG
PROG
PROG
MAX
=
(
)
=
=
.
930
1 5
930
1395
where R
PROG
is the total resistance from the PROG pin to
ground. For example, if 1A of fast charge current is
required:
R
A
k
PROG
=
=
1395
1
1 4 1% Resistor
Under precharge conditions, the current is reduced to
20% of the fast charge value (I
MAX
).The LTC4060 is
designed for a maximum current of 2A. This translates to
a maximum PROG pin current of 2.15mA and a minimum
program resistor of 698
. Reduced accuracy at low
current limits the useful fast charge current to a minimum
of approximately 200mA. Errors in the charge current can
be statistically approximated as follows:
One Sigma Error
7mA
For best stability over temperature and time, 1% metal-
film resistors are recommended. Capacitance on the PROG
pin should be limited to about 75pF to insure adequate AC
phase margin for its amplifier.
Different charge currents can be programmed by various
means such as by switching in different program resis-
tors. A voltage DAC connected through a resistor to the
PROG pin or a current DAC connected in parallel with a
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| LTC4060EDHC | 制造商:Linear Technology 功能描述:Battery Charger NiCD/NiMH 2000mA -0.3V to 10.3V 16-Pin DFN EP |
| LTC4060EDHC#PBF | 功能描述:IC BATT CHARGER NIMH/NICD 16DFN 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(biāo)準(zhǔn)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) |
| LTC4060EDHC#TR | 制造商:Linear Technology 功能描述:Battery Charger NiCD/NiMH 2000mA -0.3V to 10.3V 16-Pin DFN EP T/R |
| LTC4060EDHC#TRPBF | 功能描述:IC BATT CHARGER NIMH/NICD 16DFN 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(biāo)準(zhǔn)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) |
| LTC4060EFE | 制造商:Linear Technology 功能描述:Battery Charger NiCD/NiMH 2000mA -0.3V to 10.3V 16-Pin TSSOP EP |
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