低成本,多种化学电池 -
充电器积木
典型工作特性
图1a的(电路,V
DCIN
= 20V ,T
A
= + 25 ℃,除非另有说明。 )
MAX1772
负载瞬态响应
(电池的拆卸和重新插入)
MAX1772 TOC01
负载瞬态响应
( STEP-负载电流)
MAX1772 toc02
V
BATT
20V/div
I
BATT
2A/div
CCV
CCI
V
CCI
500mV/div
V
CCV
500mV/div
1ms/div
目前电池
V
ICTL
= 0.957V
V
CTL
= 3.3V
CCI
CCS
V
CCS
500mV/div
V
CCI
500mV/div
V
BATT
20V/div
I
负载
2A/div
1ms/div
V
ICTL
= 3.30V
充电电流= 2.0A
V
BATT
= 16V
负载阶跃= 0〜 3A
I
来源
LIMIT = 5A
LDO的负载调整率
MAX1772 toc03
0.3
V
DCIN
10V/div
LDO的误差(%)
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
0
2ms/div
V
BATT
= 16V
V
DCIN
= 18.5V TO 27.5V
I
负载
= 150毫安
V
VCTL
= 0V
V
ICTL
= 3.3V
V
DCIN
= 20.0V
V
LDO
= 5.40V
V
BATT
( AC耦合)
100mV/div
1
2
3
4
5
6
7
8
9
10
LDO电流(mA)
_______________________________________________________________________________________
MAX1772 toc04
线路瞬态响应
0.4
7