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| 型号： | MAX1909ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 29/30页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATTERY 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 8 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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Multichemistry Battery Chargers with Automatic
System Power Selector
e) Connect C1 and C2 to the high-side MOSFET
(10mm max length). Return these capacitors to
the power ground plane.
f)
Minimize the LX node (MOSFETs, rectifier cath-
ode, inductor (15mm max length)).
Ideally, surface-mount power components are
flush against one another with their ground
terminals almost touching. These high-current
grounds are then connected to each other with
a wide, filled zone of top-layer copper, so they
do not go through vias.
The resulting top-layer ground plane is connected
to the normal inner-layer ground plane at the out-
put ground terminals, which ensures that the IC’s
analog ground is sensing at the supply’s output
terminals without interference from IR drops and
ground noise. Other high-current paths should
QUIET GROUND
ISLAND
PGND
POWER PATH
KELVIN-SENSE VIAS
UNDER THE SENSE
also be minimized, but focusing primarily on short
ground and current-sense connections eliminates
about 90% of all PC board layout problems.
2) Place the IC and signal components. Keep the main
switching node (LX node) away from sensitive ana-
log components (current-sense traces and REF
capacitor). Important: the IC should be less than
10mm from the current-sense resistors.
Quiet connections to REF, VCTL, ICTL, CCV, CCI,
CCS, IINP, ACIN, and DCIN should be returned to a
separate ground (GND) island. The appropriate
traces are marked on the schematic with the
INDUCTOR
C IN
C OUT
C OUT
RESISTOR
(REFER TO EVALUATION KIT)
OUTPUT
ground symbol ( ). There is very little current flow-
ing in these traces, so the ground island need not
be very large. When placed on an inner layer, a siz-
able ground island can help simplify the layout
because the low-current connections can be made
through vias. The ground pad on the backside of
the package should also be connected to this quiet
ground island.
INPUT
GND
Figure 12. PC Board Layout Examples
3) Keep the gate drive traces (DHI and DLO) as short
as possible (L < 20mm), and route them away from
the current-sense lines and REF. These traces
should also be relatively wide (W > 1.25mm).
4) Place ceramic bypass capacitors close to the IC.
The bulk capacitors can be placed further away.
5) Use a single-point star ground placed directly
below the part at the PGND pin. Connect the power
ground (ground plane) and the quiet ground island
at this location. See Figure 12.
TRANSISTOR COUNT: 2720
PROCESS: BiCMOS
Chip Information
______________________________________________________________________________________
29
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1909EVKIT | 功能描述:电池管理 Evaluation Kit for the MAX1909 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX190ACNG | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX190ACNG+ | 功能描述:模数转换器 - ADC 12Bit 75ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX190ACWG | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX190ACWG+ | 功能描述:模数转换器 - ADC 12Bit 75ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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