参数资料
| 型号： | LTC4101EG#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 27/30页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR BATT CHRG 24-SSOP |
| 标准包装： | 59 |
| 功能： | 充电管理 |
| 电池化学： | 智能电池 |
| 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： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 管件 |
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LTC4101
APPLICATIONS INFORMATION
essential. (See Figure 11.) Here is a PCB layout priority
list for proper layout. Layout the PCB using this speci?c
order.
1. Input capacitors need to be placed as close as possible
to switching FET’s supply and ground connections.
Shortest copper trace connections possible. These
parts must be on the same layer of copper. Vias must
not be used to make this connection.
2. The control IC needs to be close to the switching FET’s
gate terminals. Keep the gate drive signals short for
a clean FET drive. This includes IC supply pins that
connect to the switching FET source pins. The IC can
be placed on the opposite side of the PCB relative to
above.
3. Place inductor input as close as possible to switching
FET’s output connection. Minimize the surface area of
this trace. Make the trace width the minimum amount
needed to support current—no copper ?lls or pours.
Avoid running the connection using multiple layers in
parallel. Minimize capacitance from this node to any
other trace or plane.
4. Place the output current sense resistor right next to
the inductor output but oriented such that the IC’s
current sense feedback traces going to resistor are not
SWITCH NODE
long. The feedback traces need to be routed together
as a single pair on the same layer at any given time
with smallest trace spacing possible. Locate any ?lter
component on these traces next to the IC and not at
the sense resistor location.
5. Place output capacitors next to the sense resistor
output and ground.
6. Output capacitor ground connections need to feed
into same copper that connects to the input capacitor
ground before tying back into system ground.
Interfacing with a Selector
The LTC4101 is designed to be used with a true analog
multiplexer for the SafetySignal sensing path. Some
selector ICs from various manufacturers may not imple-
ment this. Consult LTC applications department for more
information.
Electronic Loads
The LTC4101 is designed to work with a real battery.
Electronic loads will create instability within the LTC4101
preventing accurate programming currents and volt-
ages. Consult LTC applications department for more
information.
L1
V BAT
DIRECTION OF CHARGING CURRENT
V IN
C2
HIGH
FREQUENCY
CIRCULATING
D1
C4
BAT
R SENSE
PATH
VIAS TO CSP AND BAT
Figure 11. High Speed Switching Path
4101 F15
4101 F14
Figure 12. Kelvin Sensing of Charging Current
4101fa
27
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相关代理商/技术参数 |
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| LTC4110 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Battery Backup System Manager |
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