LT1571-1 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT1571-1
Linear Technology
LT1571-1 Datasheet PDF : 16 Pages
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LT1571 Series
BLOCK DIAGRA
80mV
++
VC
–
0.2V
BAT
+
+
–
VCC
–
+
+
GND
1.5V
PWM
VBAT
C1
SHUTDOWN
200kHz/500kHz
OSCILLATOR
S
VCC
BOOST
+VIN
D2
QSW
C1
R
R
SW
L1
D1
SLOPE
B1
COMPENSATION
R2
R3
SENSE
CA1
R1
1k
IPROG
IBAT
=
500µA/A
IBAT RS1
BAT
IBAT
VBAT
BATTERY
IPROG
BAT2
A11
(LT1571-2,
LT1571-5
ONLY)
VC
CAP
FLAG
CA2
75k
VREF
IVA
4
IVA
IPROG
E6
+
4V
R7
VA
R6
VREF
11k
R4
2.465V
R5
2k
VFB
(LT1571-1
ONLY)
SELECT
(LT1571-2,
LT1571-5
ONLY)
NOTES: LT1571-2: R4 = 7.1k, R7 = 30.24k
LT1571-5: R4 = 3.33k, R7 = 8.62k
LT1571-1: 200kHz, VFB PIN FOR ADJUSTABLE
BATTERY VOLTAGE (VFB PIN IS NOT INTERNALLY
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)
CPROG
PROG
RPROG
IBAT
=
2.465V
RPROG
•
2000
1571 BD
6
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