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参数资料
| 型号： | LTC4002EDD-8.4#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATTERY LI-ION 10-DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 8.9 V ~ 22 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
LTC4002
TYPICAL PERFOR A CE CHARACTERISTICS
End-of-Charge Ratio
vs Temperature
T A = 25 ° C, V CC = 10V unless otherwise noted.
End-of-Charge Ratio
vs V CC
14
13
12
11
10
9
8
7
LTC4002-8.4
14
13
12
11
10
9
8
7
LTC4002-8.4
6
– 50 – 25
0
25
50
75
100
125
6
5
10
15
20
25
TEMPERATURE ( ° C)
4002 G30
V CC (V)
4002 G31
PI FU CTIO S
(DFN/SO-8)
COMP (Pin 1/Pin 1): Compensation, Soft-Start and Shut-
down Control Pin. The COMP pin is the control signal of the
inner loop of the current mode PWM. Charging begins when
theCOMPpinreaches800mV.Therecommendedcompen-
sation components are a 0.47 μ F (or larger) capacitor and
a 2.2k series resistor. A 100 μ A current into the compen-
sation capacitor also sets the soft-start slew rate. Pulling
the COMP pin below 360mV will shut down the charger.
V CC (Pin 2/Pin 2): Positive Supply Voltage Input. V CC can
range from V BAT(FLT) + 0.5V to 22V. A 0.1 μ F or higher ca-
pacitor is required at the V CC pin with the lead length kept
to a minimum. A 10 μ F low ESR capacitor is also required
at the source pins of the power P-channel MOSFET.
GATE (Pin 3/Pin 3): Gate Drive Output. Driver Output for
the P-Channel MOSFET. The voltage at this pin is internally
clamped to 8V below V CC , allowing a low voltage MOSFET
with gate-to-source breakdown voltage of 8V or less to be
used.
PGND, SGND, Exposed Pad, GND (Pins 4, 5, 11/Pin 4):
IC Ground. The exposed pad (DFN) must be soldered to PCB
ground to provide both electrical contact and optimum
thermal performance.
CHRG (Pin 6/Pin 5): Open-Drain Charge Status Output.
When the battery is being charged, the CHRG pin is pulled
current drops below the End-of-Charge threshold for more
than 120 μ s, the N-channel MOSFET turns off and a 25 μ A
current source is connected from the CHRG pin to GND.
When the timer runs out or the input supply is removed,
the 25 μ A current source is turned off and the CHRG pin
becomes high impedance.
BAT (Pin 7/Pin 6): Battery Sense Input. A bypass capaci-
tor of 22 μ F is required to minimize ripple voltage. An
internal resistor divider, which is disconnected in sleep
mode, sets the final float voltage at this pin. If the battery
connection is opened when charging, an overvoltage
circuit will limit the charger output voltage to 10% above
the programmed float voltage.
When V BAT is within 250mV of V CC , the LTC4002 is forced
into sleep mode, dropping I CC to 10 μ A.
SENSE (Pin 8/Pin 7): Current Amplifier Sense Input. A sense
resistor, R SENSE , must be connected between the SENSE
and BAT pins. The maximum charge current is equal to
100mV/R SENSE .
NTC (Pin 9/Pin 8): NTC (Negative Temperature Coefficient)
Thermistor Input. With an external 10k ? NTC thermistor
to ground, this pin senses the temperature of the battery
pack and stops the charger when the temperature is out of
range. When the voltage at this pin drops below 355mV at
low by an internal N-channel MOSFET. When the charge
4002f
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4002ES8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Li-Ion Switch Mode Battery Charger |
| LTC4002ES8-4.2 | 功能描述:IC CHARGER BATTERY LI-ION 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4002ES8-4.2#PBF | 功能描述:IC CHARGER BATTERY LI-ION 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4002ES8-4.2#TR | 功能描述:IC CHARGER BATTERY LI-ION 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC4002ES8-4.2#TRPBF | 功能描述:IC CHARGER BATTERY LI-ION 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
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