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参数资料
| 型号： | LTC4008EGN-1 |
| 厂商： | Linear Technology |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER CTRLR 4A 20SSOP |
| 标准包装： | 55 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 管件 |
LTC4008
TEST CIRCUIT
7
V FB
+
–
V REF
+
–
EA
LTC4008
13
BATMON
11
CSP
12
BAT
9
I TH
90.325k
LT1055
+
9.675k
–
0.6V
4008 TC
OPERATION
OVERVIEW
The LTC4008 is a synchronous current mode PWM step
down (buck) switcher battery charger controller. The
charge current is programmed by the combination of a
program resistor (R PROG ) from the PROG pin to ground
and a sense resistor (R SENSE ) between the CSP and BAT
pins. The ?nal ?oat voltage is programmed with an external
resistor divider and the internal 1.19V reference voltage.
Charging begins when the potential at the DCIN pin rises
above the voltage at BAT (and the UVLO voltage) and the
ACP/ SHDN pin is high. An external thermistor network is
sampled at regular intervals. If the thermistor value exceeds
design limits, charging is suspended and the FAULT pin is
set low. If the thermistor value returns to an acceptable
value, charging resumes and the FAULT pin is set high. An
external resistor on the R T pin sets the sampling interval
for the thermistor.
Table 1. Truth Table For Indicator States
As the battery approaches the ?nal ?oat voltage, the
charge current will begin to decrease. When the current
drops to 10% of the full-scale charge current, an internal
C/10 comparator will indicate this condition by latching
the FLAG pin low. If this condition is caused by an input
current limit condition, described below, then the FLAG
indicator will be inhibited. When the input voltage is not
present, the charger goes into a sleep mode, dropping
battery current drain to 15μA. This greatly reduces the
current drain on the battery and increases the standby
time. The charger can be inhibited at any time by forcing
the ACP/ SHDN pin to a low voltage. Forcing ACP/ SHDN
low, or removing the voltage from DCIN, will also clear
the FLAG pin if it is low.
MODE
Shutdown by low adapter voltage (Disabled on LTC4008-1)
Normal charging
Input current limited charging
Charger shut down due to thermistor out of range
Shut down by ACP/ SHDN pin (USER)
Shut down by undervoltage lockout
DCIN
<BAT
>BAT
>BAT
>BAT
X
>BAT + <UVL
ACP/ SHDN
LOW
HIGH
HIGH
HIGH
Forced LOW
HIGH
FLAG **
HIGH
HIGH
HIGH*
X
HIGH
HIGH
FAULT **
HIGH
HIGH*
HIGH*
LOW
HIGH
HIGH*
I CL
LOW
HIGH*
LOW
HIGH
LOW
LOW
*Most probable condition, **Open-drain output, HIGH = Open with pull-up, X = Don’t care
4008fb
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4008EGN-1#PBF | 功能描述:IC BATT CHARGER CTRLR 4A 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC4008EGN-1#TR | 功能描述:IC CHARGER BATTERY 4A 20-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4008EGN-1#TRPBF | 功能描述:IC BATT CHARGER CTRLR 4A 20SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4008EGNPBF | 制造商:Linear Technology 功能描述:4A, High Eff Li-Ion Charger LTC4008EGN |
| LTC4009 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage High Current Controller for Battery Charging and Power Management |
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