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参数资料
| 型号： | MAX1736EUT42+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/8页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY CHRGR SGL LI+ SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.7 V ~ 22 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 标准包装 |
| 其它名称： | MAX1736EUT42+TDKR |
SOT23, Single-Cell Li+ Battery Charger
for Current-Limited Supply
CHARGER
POWER REMOVED
(FROM ANY STATE)
CHARGER
POWER
PRESENT
(FROM A N Y STATE)
EN
SHUTDOWN
FET: OFF
TOP-OFF QUAL
FET: OFF
DISABLED
FET: OFF
FAST-CHARGE QUAL
FET: OFF
IN
EN
PRECHARGE
FET: OFF
I OUT = -6mA
EVERY
CYCLE
CHARGER
POWER
PRESENT
DETECTION
INTERVAL
CHARGER
POWER
PRESENT
Figure 2. State Machine
TOP-OFF
FET: PULSED
V BATT > 4.2V
FAST-CHARGE
FET: ON
FET are the minimum drain-source breakdown voltage
and the minimum turn-on threshold voltage (V GS ).
Power dissipation during fast charge is approximately
R DSON ? I CHG 2 , where I CHG is the current limit set by
the input power source. The minimum breakdown volt-
age (BV DS ) must typically be two times the wall cube ’ s
open-circuit voltage. An even larger margin may be
necessary if the wall adapter has especially poor tran-
sient response. The MAX1736 can operate with input
voltages up to 22V.
BATT Capacitor
Bypass BATT with at least 1.5μF per amp of charge
current. If the battery is removed while the P-channel
MOSFET is on, a BATT voltage over 5V is quickly
sensed, and the FET is immediately turned off. In appli-
cations where the cell is removable, very large capaci-
tance values may increase transient currents when the
cell is replaced. Therefore, BATT capacitance in
excess of 100μF should be avoided. For best system
performance with large output capacitance, at least
0.47μF of the total capacitance should be low-ESR
ceramic.
C CT and C GATE
Most applications will use the circuit of Figure 3 with
C GATE = 0.22μF, R GATE = 100k ? , and C CT = 0.33μF.
C GATE , R GATE , and the internal 100μA pull-up and pull-
down current sources act to slow the switching of the P-
channel MOSFET. This prevents a wall cube with poor
transient response from subjecting V IN to excessive
voltage when the P-channel MOSFET turns off, and pre-
vents excessive current into the battery when the P-
channel MOSFET turns on. Excessive voltage at V IN
can potentially damage the IC, input capacitor, and the
PMOS switch. Excessive current into the battery can
cause errors in the termination process of the MAX1736
(by raising the instantaneous battery voltage) and may
trip the battery ’ s protection circuitry.
In applications utilizing a wall cube with poor transient
response, increase the value of C GATE as needed to
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1736EUT-T | 功能描述:电池管理 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 |
| MAX1737EEI | 功能描述:电池管理 Stand-Alone Switch-M L-Ion Battery Chargr 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 |
| MAX1737EEI+ | 功能描述:电池管理 Stand-Alone Switch-M L-Ion Battery Chargr 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 |
| MAX1737EEI+ | 制造商:Maxim Integrated Products 功能描述:SEMICONDUCTOR ((NW)) |
| MAX1737EEI+T | 功能描述:电池管理 Stand-Alone Switch-M L-Ion Battery Chargr 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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