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参数资料
| 型号： | LT1769 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | Constant-Current/ Constant-Voltage 2A Battery Charger with Input Current Limiting |
| 中文描述： | 恒流/恒压电池充电器，带甲输入限流 |
| 文件页数： | 3/16页 |
| 文件大小： | 214K |
| 代理商： | LT1769 |
3
LT1769
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= 16V, V
BAT
= 8V, R
S2
= R
S3
= 200
(see Block Diagram),
V
CLN
= V
CC
. No load on any outputs unless otherwise noted.
The
G
denotes specifications which apply over the full operating
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overall
Boost Pin Current
V
CC
= 20V, V
BOOST
= 0V
V
CC
= 28V, V
BOOST
= 0V
2V
≤
V
BOOST
– V
CC
< 8V (Switch ON)
8V
≤
V
BOOST
– V
CC
≤
25V (Switch ON)
0.1
0.25
6
8
10
20
9
12
μ
A
μ
A
mA
mA
Switch
Switch ON Resistance
8V
≤
V
CC
≤
V
MAX
, I
SW
= 2A,
V
BOOST
– V
SW
≥
2V
V
BOOST
= 24V, I
SW
≤
2A
V
SW
= 0V, V
CC
≤
20V
20V < V
CC
≤
28V
G
0.15
0.25
I
BOOST
/
I
SW
During Switch ON
Switch OFF Leakage Current
25
35
mA/A
G
G
2
4
100
200
μ
A
μ
A
Minimum I
PROG
for Switch ON
Minimum I
PROG
for Switch OFF
Maximum V
BAT
for Switch ON
Current Sense Amplifier CA1 Inputs (Sense, BAT)
G
2
4
20
μ
A
G
1
2.4
mA
G
V
CC
– 2
V
Input Bias Current
G
–50
–125
μ
A
Input Common Mode Low
G
–0.25
V
Input Common Mode High
G
V
CC
– 2
–200
V
SPIN Input Current
–100
μ
A
Reference
Reference Voltage (Note 3)
R
PROG
= 4.93k, Measured at OVP with
VA Supplying I
PROG
and Switch OFF
All Conditions of V
CC
, T
A
≥
0
°
C
2.448
2.465
2.477
V
Reference Voltage
G
G
2.441
2.43
2.489
2.489
V
V
T
A
< 0
°
C (Note 4)
Oscillator
Switching Frequency
180
200
220
kHz
Switching Frequency
All Conditions of V
CC
, T
A
≥
0
°
C
G
G
170
160
200
230
230
kHz
kHz
T
A
< 0
°
C
Maximum Duty Cycle
90
85
93
%
%
G
Current Amplifier CA2
Transconductance
V
C
= 1V, I
VC
=
±
1
μ
A
150
250
550
μ
mho
Maximum V
C
for Switch OFF
I
VC
Current (Out of Pin)
G
0.6
V
V
C
≥
0.6V
V
C
< 0.45V
100
3
μ
A
mA
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