参数资料
型号: MAX8971EWP+T
厂商: Maxim Integrated Products
文件页数: 5/39页
文件大小: 0K
描述: IC DCDC CHRGR LI+ 1CELL 20WLP
标准包装: 2,500
功能: 充电管理,过压/欠压保护
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4 V ~ 7.5 V
工作温度: -40°C ~ 85°C
安装类型: *
封装/外壳: *
供应商设备封装: *
包装: *
MAX8971
Industry's Smallest 1.55A
1-Cell Li+ DC-DC Charger
ELECTRICAL CHARACTERISTICS (continued)
(V DC = 5V, C BYP = 1 F F, I FCHG = 500mA, C AVL = 4.7 F F, V THM = AVL/2, T A = -40 N C to +85 N C, unless otherwise noted. Typical values
are at T A = +25 N C.) (Note 2)
PARAMETER
Input-Current Limit Accuracy
CONDITIONS
USB 100mA mode
USB 500mA mode
Input limit programmed to 1.5A, I FCHG = 1500mA
MIN
90
450
1350
TYP
95
475
1500
MAX
100
500
1650
UNITS
mA
Adaptive Input-Current Limit (AICL) DC voltage where charge current is regulated
(Note 4) DC voltage where charge current is set to 75mA
4.5
4.4
V
Input Limit Switch
V DC = 5.5V, I BYP = 100mA
35
80
m I
BUCK OPERATION
Switching Frequency
Maximum Duty Cycle
Minimum On-Time
Maximum On-Time
Minimum Off-Time
Soft-Start Time
V BAT = 3.6V
4
99.5
55
10
65
1.5
MHz
%
ns
μs
ns
ms
High-Side Resistance
Low-Side Resistance
Thermal Regulation Temperature
(T REG )
Thermal Regulation Gain
I LX = 100mA, V DC = 5.5V
I LX = 100mA, V DC = 5.5V
I 2 C programmable 2-bits (90, 105, 120, and disable
selections, 105 default)
Percentage decrease in I FCHG above the thermal
regulation temperature
120
150
105
5
250
220
m I
m I
° C
%/ ° C
BATTERY CHARGER PRECHARG E
Battery-Prequalification Lower
Threshold (V PQLTH )
Dead-Battery Charge Current
(I DBAT )
Battery-Prequalification Upper
Threshold (V PQUTH ) **
Prequalification Charge Current
(I PQ )
V BAT rising, 130mV hysteresis
0V ≤ V BAT ≤ 2.1V
V BAT rising, 150mV hysteresis
Percentage of fast-charge current programmed
2.1
45
2.5
10
V
mA
V
%
CONSTANT-CURRENT MODE
BAT Fast-Charge Current Range
(I FC )
5 bits–50mA steps, R CS = 47m I
250
1550
mA
Fast-Charge Current Accuracy
T A = +15 N C to +45 N C
JEITA safety region (Figure 6 )
-5
-65
-50
+5
-35
%
%
Maxim Integrated
5
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