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参数资料
| 型号： | LTC4012IUF-3#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/28页 |
| 文件大小： | 0K |
| 描述： | IC CTLR BATT CHARGER CC/CV 20QFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
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LTC4012-3
TYPICAL PERFORMANCE CHARACTERISTICS
(T A = 25°C unless otherwise noted. L = IHLP-2525 6.8μH)
PWM Frequency vs Duty Cycle
PWM Frequency
vs Charge Current
600
I CHG = 750mA
600
500
400
300
200
500
400
300
200
CLP = 15V
R SENSE = 33m
R IN = 3.01k
BAT = 5V
BAT = 12V
100
0
0
20
40 60
CLP = 6V
CLP = 12V
CLP = 20V
CLP = 25V
80
100
100
0
0
0.5
BAT = 14.5V
1.0 1.5 2.0
2.5
3.0
25
DUTY CYCLE (%)
Battery Shutdown Current
4012-3 G13
CHARGE CURRENT (A)
INFET Response Time to
DCIN Short to Ground
4012-3 G14
20
15
10
DC1256-CLASS
APPLICATION
DCIN = 0V
LTC4012-3,
ALL PINS
DCIN = 0V
V GS = 0V
0A
PFET V GS (1V/DIV)
I DCIN, REVERSE
(5A/DIV)
TIME (1μs/DIV)
4012-3 G16
5
0
0
5
LTC4012-3,
BAT PINS
DCIN = 20V
10 15
20
25
DCIN = 15V
INFET = Si7423DN
I OUT = <50mA
V OUT = 12.3V
C OUT = 0.27F
BATTERY VOLTAGE (V)
4012-3 G15
40123fb
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