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| 型号： | MAX8600AETD+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHARGER SGL 14TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 0 V ~ 14 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
Single-Input 1-Cell Li+ Charger with
OVP Protection and Programmable Charge Timer
Detailed Description
The MAX8600A is a single-cell Li+ battery charger.
Charging is optimized for Li+ cells using a control algo-
rithm that includes low-battery precharging, charging
with simultaneous voltage and current compliance, and
top-off charging. The battery is continuously monitored
for over/under temperature, and charging is suspended
if the temperature is out of range. Charging is also ter-
minated when the input source voltage is greater than
6.5V, or after excess charging time (fault). Charger
timeout protection is programmable. Charger status is
indicated by three-open drain outputs: POK , CHG , and
FLT . An input overvoltage protection circuit prevents
charging from improper input sources.
The MAX8600A reduces charging time by continuously
adjusting the charge rate to accommodate the thermal
characteristics of a given application. There is no need to
reduce the maximum charge current based on worst-case
supply voltage, temperature, and thermal resistance.
DC Charging
The MAX8600A is designed to charge a single-cell Li+
battery from a DC source voltage between 4.1V and
6.0V. The precharge current, charge current, and top-
off threshold are programmable with R SETI .
EN Charger-Enable Input
EN is a logic input (active low) that enables the charger.
maximum charge current set by R SETI . When the
MAX8600A is used in conjunction with a microproces-
sor (μP), connect a pullup resistor between CHG and
the logic I/O voltage to indicate charge status to the μP.
Alternatively, CHG can sink up to 20mA for an LED
charge indicator.
Fault Indicator ( FLT )
The MAX8600A contains an open-drain FLT output to
signal the user when a fault occurs. FLT goes low if the
charger is in prequal and the prequal timer expires, or
if the charger is in fast-charge and the fast-charge time
expires. FLT does not go low if the THM thermistor tem-
perature is out of range. Toggle EN or the input power
to reset the FLT indicator.
Power-OK Indicator ( POK )
The MAX8600A contains an open-drain POK output
that goes low when a valid input source is detected at
DC. A valid input source is one whose voltage is
between 4.1V and 6.0V and exceeds the battery volt-
age by 350mV. After a valid input has been estab-
lished, charging is sustained with inputs as low as 3.5V
as long as the input voltage remains above the battery
voltage by at least 75mV (typ). Figure 2 shows POK
being used to drive an external p-channel MOSFET to
create a node called SAFE DC. SAFE DC is an overvolt-
age-protected version of DC.
Drive EN high to disable the charger-control circuitry.
Drive EN low or connect to GND for normal operation.
Soft-Start
To prevent input transients, the rate of change of
charging current is limited. When the charger is turned
D2
R1
470k Ω
Q1
SAFE DC
LOGIC
SUPPLY
on or when the input source is changed, charge current
is ramped from 0 to the set current value in typically
1.2ms. This is done to ensure that the DC source is not
subjected to a severe load current step.
DC INPUT
4.1V TO 6.0V
OFF
C1
1 μ F
DC
EN
MAX8600A
POK
D1
R2
100k Ω
LED
R3
330 Ω
Charge-current ramp-up is also limited when transition-
ing from prequal to fast-charge. There is no dI/dt limit-
ing, however, if I SET is changed suddenly using a
switch at R SETI .
ON
C CT
0.068 μ F
CT
CHG
FLT
BAT
C2
Thermal-Limit Control
The MAX8600A features a thermal limit that reduces the
charge current when the die temperature exceeds
+100°C. As the temperature increases above +100°C, the
IC lowers the fast-charge current compliance by 5%/°C.
R SETI
2k Ω
SETI
GND
THM
2.2 μ F
T1
10k Ω AT
+25 ° C
+
Li+
CHG Charge-Indicator Output
CHG is an open-drain output that indicates charger sta-
tus. CHG goes low during charge cycles where V BAT is
greater than 2.5V and I BAT is greater than 6% of the
Figure 2. Typical operating circuit. An R SETI of 2k Ω sets a maxi-
mum charge current of 750mA.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8600ETD+ | 制造商:Maxim Integrated Products 功能描述:PROT LI-ION/LI-POL 1A 4.2V 14TDFN EP - Rail/Tube |
| MAX8600ETD+T | 功能描述:电池管理 Single-Input 1-Cell Li+ Charger With Ovp 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 |
| MAX8600ETD-T | 制造商:Maxim Integrated Products 功能描述:SINGLE-INPUT, 1-CELL LI+ CHARGER W. OVP PROTE - Tape and Reel |
| MAX8601ETD | 制造商:Maxim Integrated Products 功能描述:USB/AC-ADAPTER/DUAL-INPUT 1-CELL LI - Rail/Tube |
| MAX8601ETD/V+T | 功能描述:电池管理 Dual-Input 1-Cell Li+ Charger With Ovp 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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