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LT1776CS8 датащи(PDF) 20 Page - Linear Technology

номер детали LT1776CS8
подробное описание детали  Wide Input Range, High Efficiency, Step-Down Switching Regulator
PDF  20 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT1776CS8 датащи(HTML) 20 Page - Linear Technology

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LT1776
© LINEAR TECHNOLOGY CORPORATION 1998
1776f LT/TP 0499 4K • PRINTED IN USA
Wide VIN Range, High Efficiency Battery Charger
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
LOAD CURRENT (mA)
20
50
40
30
90
80
70
60
1776 TA03
10
1000
100
VIN = 12V
VIN = 24V
Battery Charger Efficiency —
Constant VOUT Region
OUTPUT CURRENT (mA)
0
1
0
2
3
4
5
7
6
50
100
150
250
200
1776 TA05
OUTPUT VOLTAGE (V)
0
60
70
80
35
1776 TA04
50
40
12
46
30
20
90
VIN = 12V
VIN = 24V
Battery Charger Efficiency —
Constant IOUT Region
Battery Charger Output Voltage
vs Output Current
VIN
VCC
VSW
U1
LT1776
U3
LT1121-5
FB
VC
SHDN
SYNC
C1: PANASONIC HFQ
C2: AVX TPSD107M010R0080
L1: COILCRAFT DO3316P-104
7
C1
39
µF
63V
5
4
1776 TA02
2
3
8
1
VIN
10V TO 30V
(SEE TEXT)
6
GND
VCC
IN +
PROG
U2
LT1620
IOUT
IN –
NC
AVG
SENSE
2
5
4
6
3
8
1
7
GND
+
D1
MBRS1100
R1
46.4k
1%
BATTERY
R2
12.1k
1%
R3
22k
R5
3k
R6
12k
L1
100
µH
R4
0.5
Ω
C4
2200pF
C3
100pF
C7
0.1
µF
C5
100pF
C6
0.33
µF
C2
100
µF
10V
C8
1
µF
+
+
TYPICAL APPLICATION
PART NUMBER
DESCRIPTION
COMMENTS
LT1076
2A, 100kHz Step-Down Switching Regulator
Operation Up to 45V Input (64V for HV Version)
LTC
®1149
High Efficiency Synchronous Step-Down Switching Regulator
Operation Up to 48V Input, 95% Efficiency, 100% Duty Cycle
LT1374
4.5A, 500kHz Step-Down Switching Regulator
Converts 12V to 3.3V at 2.5A in SO-8 Package
LT1375/LT1376
1.5A, 500kHz Step-Down Switching Regulators
Operation Up to 25V Input, Synchronizable (LT1375)
LT1620
Rail-to-Rail Current Sense Amplifier
Transforms Switching Regulators into High Efficiency
Battery Chargers
LT1676
Wide Input Range, High Efficiency, Step-Down Switching Regulator
7.4V to 60V Input, 100kHz Operation, 700mA Internal Switch
LT1777
Low Noise Buck Regulator
Operation up to 48V, Controlled Voltage and Current
Slew Rates
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