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參數(shù)資料
| 型號： | MAX1551-MAX1555 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 基準電壓源/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1節(jié)鋰電池充電器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 204K |
| 代理商： | MAX1551-MAX1555 |
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1551 | SOT23. Dual-Input. USB/AC Adapter. 1-Cell Li+ Battery Chargers |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1552ETE | 功能描述:PMIC 解決方案 Complete PMIC for PDAs RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX1552ETE-T | 功能描述:PMIC 解決方案 Complete PMIC for PDAs RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| MAX1552EVKIT | 制造商:Maxim Integrated Products 功能描述:COMPLETE PMIC FOR LOW COST PDA'S - Rail/Tube |
| MAX1553ETA | 制造商:Maxim Integrated Products 功能描述:SMALLEST, HIGHEST-EFFICIENCY, 40V STEP-UP CON - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX1553ETA+ | 制造商:Maxim Integrated Products 功能描述:LED DRVR 10SEGMENT 2.7V TO 5.5V 8TDFN EP - Rail/Tube |
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