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參數(shù)資料
| 型號： | MAX1909ETI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Multichemistry Battery Charger with Automatic System Power Selector |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, QCC28 |
| 封裝： | 5 X 5 MM, 0.80 MM HEIGHT, MO-220-WHHD-1, TQFN-28 |
| 文件頁數(shù)： | 28/29頁 |
| 文件大?。?/td> | 551K |
| 代理商： | MAX1909ETI |
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M
Multichemistry Battery Charger with Automatic
System Power Selector
28
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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 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
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.
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 13.
Chip Information
TRANSISTOR COUNT: 2720
PROCESS: BiCMOS
INDUCTOR
C
IN
C
OUT
C
OUT
INPUT
OUTPUT
KELVIN-SENSE VIAS
UNDER THE SENSE
RESISTOR
(REFER TO EVALUATION KIT)
GND
VIA CONNECTING
POWER GROUND TO
QUIET ANALOG GROUND
HIGH-CURRENT
PGND PLANE
QUIET GROUND
ISLAND
Figure 13. PC Board Layout Examples
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1909ETI+ | 功能描述:電池管理 Multichemistry Battery Chargers RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1909ETI+T | 功能描述:電池管理 Multichemistry Battery Chargers RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1909ETI-T | 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX1909EVKIT | 功能描述:電池管理 Evaluation Kit for the MAX1909 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| MAX190ACNG | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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