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參數(shù)資料
| 型號： | LTC4010EFE |
| 廠商： | Linear Integrated Systems |
| 英文描述： | High Efficiency Standalone Nickel Battery Charger |
| 中文描述： | 高效率的獨立鎳電池充電器 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大小： | 205K |
| 代理商： | LTC4010EFE |
10
LTC4010
4010p
will resume when all temperatures return to acceptable
levels. Refer to the Status Outputs section for more detail.
Insertion and Removal of Batteries
The LTC4010 automatically senses the insertion or re-
moval of a battery by monitoring the V
CELL
pin voltage.
Should this voltage fall below 350mV, the IC considers the
battery to be absent. Removing and then inserting a
battery causes the LTC4010 to initiate a completely new
charge cycle beginning with charge qualification.
External Pause Control
After charging is initiated, the V
TEMP
pin may be used to
pause operation at any time. When the voltage between
V
TEMP
and GND drops below 200mV, the charge timer
pauses, fast charge termination algorithms are inhibited
and the PWM outputs are disabled. The status and V
CDIV
outputs all remain active. Normal function is fully restored
from the previous state when pause ends.
Status Outputs
The LTC4010 open-drain status outputs provide valuable
information about the IC’s operating state and can be
used for a variety of purposes in applications. Table 1
summarizes the state of the three status outputs and the
V
CDIV
pin as a function of LTC4010 operation. The status
outputs can directly drive current-limited LEDs termi-
nated to the DC input. The V
CDIV
column in Table 1 is
strictly informational. V
CDIV
should only be used to termi-
nate the V
CELL
resistor divider, as previously discussed.
PWM Current Source Controller
An integral part of the LTC4010 is the PWM current source
controller. The charger uses a synchronous step-down
architecture to produce high efficiency and limited thermal
dissipation. The nominal operating frequency of 550kHz
allows use of a smaller external inductor. The TGATE and
BGATE outputs have internally clamped voltage swings.
They source peak currents tailored to smaller surface-
mount power FETs likely to appear in applications provid-
ing an average charge current of 3A or less. During the
various charging states, the LTC4010 uses the PWM
controller to regulate an average voltage between SENSE
and BAT that ranges from 10mV to 100mV.
A conceptual diagram of the LTC4010 PWM control loop
is shown in Figure 2.
The voltage across the external current programming
resistor R
SENSE
is averaged by integrating error amplifier
EA. An internal programming current is also pulled from
input resistor R1. The I
PROG
R1 product establishes the
desired average voltage drop across R
SENSE
, and hence,
the average current through R
SENSE
. The I
TH
output of the
error amplifier is a scaled control current for the input of
the PWM comparator CC. The I
TH
R3 product sets a peak
OPERATIOU
Table 1. LTC4010 Status Pins
READY
FAULT
Off
Off
On
Off
CHRG
Off
Off
V
CDIV
Off
On
CHARGER STATE
Off
Ready to Charge
(V
TEMP
Held Low)
or Automatic Recharge
Precharge, Fast or Top Off
Charge (May be Paused)
Temperature Limits
Exceeded
Fault State (Latched)
On
Off
On
On
On
On
On or Off
On
Off
On
Off
On
Figure 2. LTC4010 PWM Control Loop
10
–
+
CC
EA
I
TH
I
PROG
R3
Q
PWM CLOCK
S
R
R4
R1
BAT
9
SENSE
R
SENSE
12
BGATE
14
TGATE
LTC4010
V
CC
R2
4010 F02
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4011 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
| LTC4011CFE | 功能描述:IC BATT CHARGER HIEFF 20TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學: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 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC4011CFE#PBF | 功能描述:IC BATT CHARGER HIEFF 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 其它有關文件:STC3100 View All Specifications 特色產(chǎn)品:STC3100 - Battery Monitor IC 標準包裝:4,000 系列:- 功能:燃料，電量檢測計/監(jiān)控器 電池化學:鋰離子（Li-Ion） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-MiniSO 包裝:帶卷 (TR) 其它名稱:497-10526-2 |
| LTC4011CFE#TR | 功能描述:IC BATT CHARGER HIEFF 20TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學: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 供應商設備封裝:SOT-6 包裝:帶卷 (TR) |
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