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參數(shù)資料
| 型號： | MAX1551 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | SOT23. Dual-Input. USB/AC Adapter. 1-Cell Li+ Battery Chargers |
| 中文描述： | SOT23封裝、雙輸入、USB/AC適配器、單節(jié)Li+電池充電器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 204K |
| 代理商： | MAX1551 |
M
Precharge Current
The MAX1551/MAX1555 feature a precharge current to
protect deeply discharged cells. If V
BAT
is less than 3V,
the device enters precharge mode where charging cur-
rent is limited to 40mA.
Package Thermal Limiting
On-chip thermal limiting in the MAX1551/MAX1555 sim-
plifies PC board layout and allows charging rates to be
optimized without the limits imposed by worst-case bat-
tery and input voltages. The device reduces the power
dissipation at BAT to prevent overheating. This allows
the board design to be optimized for compact size and
typical thermal conditions. When the MAX1551/
MAX1555 thermal limits are reached, the chargers do
not shut down, but progressively reduce charging cur-
rent by 17mA/
°
C above a die temperature of +110
°
C.
Solder the MAX1551/MAX1555s
’
GND to a large
ground plane to help dissipate power and keep the die
temperature below the thermal limit. The USB charge
current of 100mA is unlikely to induce thermal limiting.
Bypass Capacitors
Use ceramic bypass capacitors at DC, USB, and BAT.
Mount these capacitors within 1cm of their respective
pins. X7R and X5R dielectrics are recommended.
Chip Information
TRANSISTOR COUNT: 541
PROCESS: BiCMOS
SOT23 Dual-Input USB/AC Adapter 1-Cell Li+
Battery Chargers
6
_______________________________________________________________________________________
MAX1551
(MAX1555)
DC
USB
BAT
AC ADAPTER
3.7V TO 7V
USB
3.7V TO 6V
TO SYSTEM
LOAD
Li+
GND
TO LOGIC RAIL
CHARGE
CONTROL
POK
(CHG)
LOGIC
CONTROL
C1
1
μ
F
C2
1
μ
F
C3
1
μ
F
R1
100k
INDICATES
THAT POWER
IS PRESENT
(EITHER DC
OR USB)
Typical Application Circuit
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PDF描述 |
|---|---|
| MAX1555 | SOT23. Dual-Input. USB/AC Adapter. 1-Cell Li+ Battery Chargers |
| MAX1552 | Complete Power IC for Low-Cost PDAs |
| MAX1552ETE | Complete Power IC for Low-Cost PDAs |
| MAX1553ETA | High-Efficiency, 40V Step-Up Converters for 2 to 10 White LEDs |
| MAX1553EVKIT | MAX1553 Evaluation Kit |
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| MAX15511GTL+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC New 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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| MAX15511TGTL+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC CPU Controller non-OVP 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX15511TGTL+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC CPU Controller non-OVP 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX15513EVI+ | 制造商:Maxim Integrated Products 功能描述:16V INPUT, 8A POINT OF LOAD, QUICKTUNE-PWM BUCK CONVERTER - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC PWM BUCK CONV 16V 28FLIPCHIP |
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