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参数资料
| 型号： | LTC4008EGN-1 |
| 厂商： | Linear Technology |
| 文件页数： | 7/24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
PIN FUNCTIONS
DCIN (Pin 1): External DC Power Source Input. Bypass
this pin with at least 0.01μF. See Applications Information
section.
I CL (Pin 2): Input Current Limit Indicator. Active low
digital output. Internal 10μA pull-up to 3.5V. Pulled low if
the charger current is being reduced by the input current
limiting function. The pin is capable of sinking at least
100μA. If V LOGIC > 3.3V, add an external pull-up.
ACP/ SHDN (Pin 3): Open-drain output used to indicate if
the AC adapter voltage is adequate for charging. Active high
digital output. Internal 10μA pull-up to 3.5V. The charger
can also be shutdown by pulling this pin below 1V. The pin
is capable of sinking at least 100μA. If V LOGIC > 3.3V, add
an external pull-up. (LTC4008-1: ACP function disabled.)
R T (Pin 4): Thermistor Clocking Resistor. Use a 150k
resistor as a nominal value. This resistor is always required.
If this resistor is not present, the charger will not start.
FAULT (Pin 5): Active low open-drain output that indicates
that charger operation has suspended due to the thermistor
exceeding allowed values. A pull-up resistor is required
if this function is used. The pin is capable of sinking at
least 100μA.
GND (Pin 6): Ground for Low Power Circuitry.
V FB (Pin 7): Input of Voltage Feedback Error Ampli?er,
EA, in the Block Diagram.
NTC (Pin 8): A thermistor network is connected from NTC
to GND. This pin determines if the battery temperature is
safe for charging. The charger and timer are suspended
and the FAULT pin is driven low if the thermistor indicates
a temperature that is unsafe for charging. The thermistor
function may be disabled with a 300k to 500k resistor
from DCIN to NTC.
I TH (Pin 9): Control Signal of the Inner Loop of the Current
Mode PWM. Higher I TH voltage corresponds to higher
charging current in normal operation. A 6k resistor in series
with a capacitor of at least 0.1μF to GND provides loop
compensation. Typical full-scale output current is 40μA.
Nominal voltage range for this pin is 0V to 3V.
PROG (Pin 10): Current Programming/Monitoring Input/
Output. An external resistor to GND programs the peak
charging current in conjunction with the current sensing
resistor. The voltage at this pin provides a linear indication
of charging current. Peak current is equivalent to 1.19V.
Zero current is approximately 0.309V. A capacitor from
PROG to ground is required to ?lter higher frequency
components. The maximum program resistance to ground
is 100k. Values higher than 100k can cause the charger
to shut down.
CSP (Pin 11): Current Ampli?er CA1 Input. The CSP and BAT
pins measure the voltage across the sense resistor, R SENSE ,
to provide the instantaneous current signals required for
both peak and average current mode operation.
BAT (Pin 12): Battery Sense Input and the Negative
Reference for the Current Sense Resistor.
BATMON (Pin 13): Output Voltage Representing Battery
Voltage. Switched off to reduce standby current drain
when AC is not present. An external voltage divider from
BATMON to V FB sets the charger ?oat voltage. Recom-
mended minimum load resistance is 100k.
FLAG (Pin 14): Active low open-drain output that indi-
cates when charging current has declined to 10% of max
programmed current. A pull-up resistor is required if this
function is used. The pin is capable of sinking at least
100μA. This function is latching. To clear it, user must
cycle the ACP/ SHDN pin.
CLN (Pin 15): Negative Input to the Input Current Limiting
Ampli?er CL1. The threshold is set at 100mV below the
voltage at the CLP pin. When used to limit input current,
a ?lter is needed to ?lter out the switching noise. If no
current limit function is desired, connect this pin to CLP.
CLP (Pin 16): This pin serves as a positive reference for
the input current limit ampli?er, CL1. It also serves as the
power supply for the IC.
TGATE (Pin 17): Drives the top external PMOSFET of the
battery charger buck converter.
PGND (Pin 18): High Current Ground Return for BGATE
Driver.
BGATE (Pin 19): Drives the bottom external N-MOSFET
of the battery charger buck converter.
INFET (Pin 20): Drives the gate of the external input
P-MOSFET. (LTC4008-1: No Connection)
4008fb
7
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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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