LT1769
框图
UV
+
7V
200kHz
振荡器
关闭
V
CC
S
BOOST
+
0.7V
+
V
SW
–
–
V
CC
+
1.5V
V
BAT
PWM
GND
C1
R2
R3
V
C
75k
CA2
V
REF
g
m
= 0.64
+
–
+
B1
CA1
–
–
+
W
UV
OUT
R
R
R
斜率补偿
V
CC
纺
SENSE
R
S3
I
BAT
R
S1
Q
SW
SW
+
+
+
–
R1
1k
I
PROG
BAT
R
S2
BAT
–
+
VA
0VP
V
REF
2.465V
100mV
–
+
CL1
+
电
–
CLn的
COMP1
COMP2
PROG
I
PROG
R
PROG
C
PROG
)(R )
(I
I
BAT
=
PROG S2
R
S1
R
S2
= 2.465V
R
PROG
R
S1
(R
S3
= R
S2
)
1769 BD
( )( )
7
