LT1571-1 LINER [Linear Technology], LT1571-1 Datasheet - Page 6

• Manufacturer Part Number: LT1571-1
• Description: Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag
• Manufacturer: LINER [Linear Technology]

BLOCK DIAGRA
LT1571 Series
6
NOTES: LT1571-2: R4 = 7.1k, R7 = 30.24k
GND
FLAG
CAP
V
C
LT1571-5: R4 = 3.33k, R7 = 8.62k
LT1571-1: 200kHz, V
BATTERY VOLTAGE (V
CONNECTED TO THE RESISTORS)
LT1571-2: 200kHz, PRESET 8.2V CELL
(SELECT PIN OPEN) OR 8.4V (SELECT PIN GROUNDED)
LT1571-5: 500KHz, PRESET 4.1V CELL
(SEECT PIN OPEN) OR 4.2V (SELECT PIN GROUNDED)
BAT
V
CC
+
V
0.2V
BAT
+
1.5V
FB
E6
FB
PIN FOR ADJUSTABLE
V
–
PWM
+
C
80mV
PIN IS NOT INTERNALLY
+
W
+
–
–
75k
+
+
–
+
–
C1
+
4V
I
I
PROG
VA
4
CA2
SLOPE
COMPENSATION
–
+
C
PROG
V
REF
SHUTDOWN
R3
R2
R
200kHz/500kHz
PROG
PROG
I
OSCILLATOR
VA
B1
+
–
VA
R1
1k
I
PROG
S
R
R
+
–
I
PROG
I
BAT
I
BAT
V
2.465V
= 500 A/A
REF
2 465
R
.
PROG
V
R7
R6
11k
R5
2k
•
CA1
2000
+
–
Q
R4
A11
SW
I
BAT
+
–
R
S1
V
BOOST
SW
SENSE
BAT
BAT2
(LT1571-2,
LT1571-5
ONLY)
V
(LT1571-1
ONLY)
SELECT
(LT1571-2,
LT1571-5
ONLY)
CC
FB
1571 BD
I
BAT
BATTERY
D1
C1
D2
L1
+V
V
BAT
IN