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參數(shù)資料
| 型號： | MAX1645B |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting |
| 中文描述： | 高級、與化學類型無關的Level 2電池充電器，帶有輸入限流 |
| 文件頁數(shù)： | 28/32頁 |
| 文件大?。?/td> | 357K |
| 代理商： | MAX1645B |
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M
Advanced Chemistry-Independent, Level 2
Battery Charger with Input Current Limiting
28
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sumption of the Schottky diode. To minimize power loss,
select a MOSFET with an R
DS(ON)
of 50m
or less. This
MOSFET must be able to deliver the maximum current
as set by R1. D1 and P1 provide protection from
reversed voltage at the adapter input.
N-channel MOSFETs N1 and N2 are the switching
devices for the buck controller. High-side switch N1
should have a current rating of at least 6A and have an
R
DS(ON)
of 50m
or less. The driver for N1 is powered
by BST; its current should be less than 10mA. Select a
MOSFET with a low total gate charge and determine the
required drive current by I
GATE
= Q
GATE
f (where f is
the DC-to-DC converter maximum switching frequency
of 400kHz).
The low-side switch N2 should also have a current rating
of at least 3A, have an R
DS(ON)
of 100m
or less, and a
total gate charge less than 10nC. N2 is used to provide
the starting charge to the BST capacitor C14. During nor-
mal operation, the current is carried by Schottky diode
D2. Choose a 3A or higher Schottky diode.
Figure 11. Typical System Using Multiple Smart Batteries
AC-DC
CONVERTER
(UNREGULATED)
AC
DC (UNREGULATED) / V
BATTERY
NOTE:
SB 1 POWERING SYSTEM
SB 2 CHARGING
V
+12V, -12V
SYSTEM HOST
(SMBus HOST)
SMART BATTERY
SELECTOR
S
S
SMBus
SAFETY SIGNAL
V
CHARGE
V
B
S
S
V
B
S
S
SMART BATTERY 1
SMART BATTERY 2
CRITICAL EVENTS
BATTERY DATA/STATUS REQUESTS
SMART
BATTERY
CHARGER
SMBus
MAX1645B
SYSTEM
POWER
SUPPLY
Table 8. Smart Battery Charger Type
by SMBus Mode and Charge Algorithm
Source
Note:
Level 1 smart battery chargers were defined in the ver-
sion 0.95a specification. While they can correctly interpret
smart battery end-of-charge messages, minimizing over-
charge, they do not provide truly chemistry-independent
charging. They are no longer defined by the Smart Battery
Charger Specification and are explicitly not compliant with this
and subsequent smart battery charger specifications.
CHARGE ALGORITHM SOURCE
SMBus MODE
BATTERY
MODIFIED FROM
BATTERY
Slave only
Slave/master
Level 2
Level 3
Level 3
Level 3
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1645BEEI | Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting |
| MAX1647 | Chemistry-Independent Battery Chargers |
| MAX1648 | Chemistry-Independent Battery Chargers |
| MAX1647-MAX1648 | Chemistry-Independent Battery Chargers |
| MAX1648ESE | Chemistry-Independent Battery Chargers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1645BEEI | 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 |
| MAX1645BEEI+ | 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 |
| MAX1645BEEI+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 |
| MAX1645BEEI-T | 功能描述:電池管理 Advanced Chemistry-Independent Level 2 Battery Charger with Input Current Limiting 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 |
| MAX1645BEVKIT | 制造商:Maxim Integrated Products 功能描述:EVALUATION KIT/EVALUATION SYSTEM FOR THE MAX1645B - Bulk |
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