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参数资料
| 型号： | LTC4011CFE |
| 厂商： | Linear Technology |
| 文件页数： | 23/26页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER HIEFF 20TSSOP |
| 标准包装： | 74 |
| 功能： | 充电管理 |
| 电池化学： | 镍镉（NiCd）、镍金属氢化物（NiMH） |
| 电源电压： | 4.5 V ~ 34 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 20-TSSOP-EP |
| 包装： | 管件 |
LTC4011
APPLICATIONS INFORMATION
capacitors. Vias should not be used to make these
connections.
2. Place the LTC4011 close to the switching FET gate
terminals, keeping the connecting traces short to
produce clean drive signals. This rule also applies to IC
supply and ground pins that connect to the switching
FET source pins. The IC can be placed on the opposite
side of the PCB from the switching FETs.
3. Place the inductor input as close as possible to the
drain of the switching FETs. Minimize the surface area
of the switch node. Make the trace width the minimum
needed to support the programmed charge current.
Use no copper fills or pours. Avoid running the con-
nection on multiple copper layers in parallel. Minimize
capacitance from the switch node to any other trace
or plane.
4. Place the charge current sense resistor immediately
adjacent to the inductor output, and orient it such that
current sense traces to the LTC4011 are short. These
feedback traces need to be run together as a single pair
with the smallest spacing possible on any given layer
on which they are routed. Locate any filter component
on these traces next to the LTC4011, and not at the
sense resistor location.
5. Place output capacitors adjacent to the sense resisitor
output and ground.
6. Output capacitor ground connections must feed into
the same copper that connects to the input capacitor
ground before tying back into system ground.
SWITCH NODE
L1
V BAT
7. Connection of switching ground to system ground,
or any internal ground plane should be single-point.
If the system has an internal system ground plane, a
good way to do this is to cluster vias into a single star
point to make the connection.
8. Route analog ground as a trace tied back to the LTC4011
GND pin before connecting to any other ground. Avoid
using the system ground plane. A useful CAD technique
is to make analog ground a separate ground net and
use a 0Ω resistor to connect analog ground to system
ground.
9. A good rule of thumb for via count in a given high
current path is to use 0.5A per via. Be consistent when
applying this rule.
10. If possible, place all the parts listed above on the same
PCB layer.
11. Copper fills or pours are good for all power connec-
tions except as noted above in Rule 3. Copper planes
on multiple layers can also be used in parallel. This
helps with thermal management and lowers trace in-
ductance, which further improves EMI performance.
12. For best current programming accuracy, provide a
Kelvin connection from R SENSE to SENSE and BAT.
See Figure 14 for an example.
13. It is important to minimize parasitic capacitance on the
TIMER, SENSE and BAT pins. The traces connecting
these pins to their respective resistors should be as
short as possible.
DIRECTION OF CHARGING CURRENT
V IN
C IN
HIGH
FREQUENCY
CIRCULATING
PATH
D1
C OUT
BAT
R SENSE
4011 F14
SWITCHING GROUND
4011 F13
SENSE
BAT
Figure 13. High Speed Switching Path
Figure 14. Kelvin Sensing of Charge Current
4011fb
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4011CFE#PBF | 功能描述:IC BATT CHARGER HIEFF 20TSSOP 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 |
| LTC4011CFE#TR | 功能描述:IC BATT CHARGER HIEFF 20TSSOP 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) |
| LTC4011CFE#TRPBF | 功能描述:IC BATT CHARGER HIEFF 20TSSOP 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) |
| LTC4011CFEPBF | 制造商:Linear Technology 功能描述:Standalone Nickel Battery Charg. TSSOP20 |
| LTC4011CFETR | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Standalone Nickel Battery Charger |
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