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参数资料
| 型号： | MP2607DL |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, QCC14 |
| 封装： | 3 X 4 MM, MO-229VEED-5, QFN-14 |
| 文件页数： | 5/15页 |
| 文件大小： | 317K |
| 代理商： | MP2607DL |
MP2607 – LI-ION CHARGER WITH POWER PATH MANAGEMENT
MP2607 Rev. 0.9
www.MonolithicPower.com
13
11/2/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
APPLICATION INFORMATION
COMPONENT SELECTION
Battery Charging Current
The
charging
current
of
MP2607
is
programmable using an external resistor RCHG
at ICHSET pin:
()
C H G
1 . 2 6 0 V
I
1 8 0 0
R
=×
Ω
where 1.260V is an internal reference voltage
for ICHSET programming. Typically RCHG is
chosen between 1.51k (1.50A ICHG) and 7.5k
(300mA ICHG).
However, due to current limit constraint at the
input source, either adapter or USB port input,
the charging current could be less than above
calculated value if system load demand is high.
MP2607 will always ensure the sum of system
load current and charging current complies with
source current limit, with system load has the
priority. Especially for USB mode, when system
load exceeds the source current limit, charging
is actually stopped and battery is pulled in to
supplement the system load.
When using USB port as input source, if the
charging current is set higher than USB port
current limit IUSB_MAX, then the real charging
current will not be higher than USB current limit
and could be reduced further if system draws
any load.
End of Charge Threshold Current
The end of charge threshold current is set
internally to be at 10% of ICHG:
E O C
C H G
1 . 2 6 0 V
I
1 8 0
R
=×
where 1.260V is an internal reference voltage
and RCHG is the programming resistor at
ICHSET pin.
When the charging current falls below IEOC,
MP2607 will terminate charge, and latch the
status pin to indicate end of charge
Trickle Charge Current
When the battery voltage is below the minimum
battery voltage V
TH_TRKL (defined in the electrical
characteristics table), the charger operates in a
trickle/preconditioning
mode,
where
the
charging current is typically 7.5% of the
programmed charge current ICHG.
T R K L
C H G
1 . 2 6 0 V
I
1 5 0
R
=×
Timer for Charge Termination
MP2607 has a built-in timer to terminate the
charge if the timer times out, regardless of if
IEOC is reached or not. This timer is
programmable using an external capacitor CTMR
at TMR pin, to allow user adjust to different
battery capacity. The timer can be calculated as:
T M R
C
T
2 . 3 h o u r
1 F
=×
μ
(ICHG = 1A)
Notice the above equation assumes the
charging current is 1A constant. Due to power
path management function, the real charging
current usually varies during the whole charging
process, thus MP2607 automatically takes into
account this variation and adjust the timer time
out accordingly. Basically the timer increases
the same proportion as the charging current
decreases. If the charging is stopped due to
high system load, the timer is temporarily
suspended. In this way, the actual energy
delivered to the battery, which is charging
current multiplying the charging time, remains
constant.
The Timer time out will set the charger into
suspended state and be reported at the status
output pins. To clear the time out status, one
has to recycle the chip enable pin or IN supply.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MP2607DL-LF-P | 功能描述:电池管理 Li-ion charger with power path mgt 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 |
| MP2607DL-LF-Z | 功能描述:电池管理 Li-ion charger with power path mgt 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 |
| MP26085DJ-LF-P | 制造商:Monolithic Power Systems 功能描述:CC/CV CONTROLLER - Tape and Reel |
| MP26085DJ-LF-Z | 制造商:Monolithic Power Systems 功能描述:CC/CV CONTROLLER - Tape and Reel |
| MP2608DQ-LF-P | 功能描述:电池管理 28V 1A 2-In Linear Batt Chrgr w/timer 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 |
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