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LT1769

更新时间： 2023-12-20 18:44:01
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
16页 237K
描述
具输入电流限制功能的恒定电流 / 恒定电压 2A 电池充电器

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LT1769 数据手册

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LT1769  
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating  
temperature range, otherwise specifications are at TA = 25°C. VCC = 16V, VBAT = 8V, RS2 = RS3 = 200Ω (see Block Diagram),  
CLN = VCC. No load on any outputs unless otherwise noted.  
V
PARAMETER  
Overall  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
V
Undervoltage Lockout (Switch OFF) Threshold  
Measured at UV Pin  
●
●
●
●
6
7
8
5
V
µA  
V
CC  
UV Pin Input Current  
0.2V ≤ V ≤ 8V  
0.1  
0.1  
0.1  
3
UV  
UV Output Voltage at UV  
Pin  
In Undervoltage State, I  
= 70µA  
0.5  
3
OUT  
UVOUT  
UV Output Leakage Current at UV  
Pin  
8V ≤ V , V  
= 5V  
µA  
µA  
OUT  
UV UVOUT  
Reverse Current from Battery (When V Is  
V
≤ 20V, V ≤ 0.4V  
15  
CC  
BAT  
UV  
Not Connected, V Is Floating)  
SW  
Boost Pin Current  
V
V
= 20V, V  
= 28V, V  
BOOST  
BOOST  
= 0V  
= 0V  
0.1  
0.25  
6
10  
20  
9
µA  
µA  
mA  
mA  
CC  
CC  
BOOST  
BOOST  
2V ≤ V  
8V ≤ V  
– V < 8V (Switch ON)  
– V ≤ 25V (Switch ON)  
CC  
8
12  
CC  
Switch  
Switch ON Resistance  
8V ≤ V ≤ V  
, I = 2A,  
CC  
MAX SW  
V
V
V
– V ≥ 2V  
●
0.15  
25  
0.25  
35  
Ω
BOOST  
SW  
∆I /∆I During Switch ON  
BOOST SW  
= 24V, I ≤ 2A  
mA/A  
BOOST  
SW  
Switch OFF Leakage Current  
= 0V, V ≤ 20V  
●
●
2
4
100  
200  
µA  
µA  
SW  
CC  
20V < V ≤ 28V  
CC  
Minimum I  
Minimum I  
for Switch ON  
for Switch OFF  
for Switch ON  
2
1
4
20  
µA  
mA  
V
PROG  
PROG  
●
●
2.4  
Maximum V  
V
– 2  
BAT  
CC  
Current Sense Amplifier CA1 Inputs (Sense, BAT)  
Input Bias Current  
●
●
●
–50  
–125  
µA  
V
Input Common Mode Low  
Input Common Mode High  
SPIN Input Current  
–0.25  
V
– 2  
V
CC  
–100  
2.465  
–200  
µA  
Reference  
Reference Voltage (Note 3)  
R
= 4.93k, Measured at OVP with  
PROG  
VA Supplying I  
and Switch OFF  
2.448  
2.477  
V
PROG  
Reference Voltage  
All Conditions of V , T ≥ 0°C  
●
●
2.441  
2.43  
2.489  
2.489  
V
V
CC  
A
T < 0°C (Note 4)  
A
Oscillator  
Switching Frequency  
Switching Frequency  
180  
200  
200  
220  
kHz  
All Conditions of V , T ≥ 0°C  
●
●
170  
160  
230  
230  
kHz  
kHz  
CC  
A
T < 0°C  
A
Maximum Duty Cycle  
90  
85  
93  
%
%
●
Current Amplifier CA2  
Transconductance  
V = 1V, I = ±1µA  
150  
250  
550  
0.6  
µmho  
C
VC  
Maximum V for Switch OFF  
●
V
C
I
Current (Out of Pin)  
V ≥ 0.6V  
V < 0.45V  
C
100  
3
µA  
mA  
VC  
C
1769fa  
3
1234567...16

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