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LTC3786 Datasheet(PDF) 39 Page - Linear Technology

Part # LTC3786
Description  Synchronous SEPIC/ Inverting/Boost Controller with Output Current Control
PDF  44 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3786 Datasheet(HTML) 39 Page - Linear Technology

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LT8710
39
8710f
For more information www.linear.com/LT8710
Typical applicaTion
300kHz, SuperCap Backup Power
8710 TA03c
VIN
10V/DIV
VOUT
10V/DIV
VIMON
1V/DIV
IL1 + IL2
5A/DIV
30s/DIV
8710 TA03d
VIN
10V/DIV
VOUT
10V/DIV
VIMON
1V/DIV
IL1 + IL2
5A/DIV
30s/DIV
LOAD CURRENT (A)
0
200
150
175
125
100
75
50
25
0
0.5
1.5
2
2.5
8710 TA03b
3
1
VSYSTEM = 10.5V
DURING HOLD-UP
System Hold-Up Time vs
System Load Current
SuperCaps Charging When VIN Is Applied
SuperCaps Hold-Up System at 10.5V for ~83s
When VIN Is Removed (ISYSTEM = 1A)
L1, L2: COILCRAFT 10µH MSD1278-103ML
MN: FAIRCHILD FDMC8327L
MP: VISHAY Si7611DN
RSENSE1: 5m 2010
RSENSE2: 50m 2512
DIN: APPROPRIATE SCHOTTKY DIODE OR IDEAL
DIODE SUCH AS LTC4358, LTC4352, LTC4412, ETC.
CIN1: 22µF, 25V, 1812, X7R
COUT: 22µF, 25V, 1812, X7R
C1: 10µF, 25V, 1210, X7R
CS1-6: POWERSTOR HB1840-2R5606-R
D1: CENTRAL SEMI CMDZ5245B-LTZ
IMON
SS
GND
CSP
TG
CSN
BG
LT8710
8710 TA03a
MODE
INTVCC
RT
SYNC
VIN
EN/FBIN
BIAS
INTVEE
FBX
FLAG
VC
ISP
ISN
VOUT
15V
VIN
12V ±5%
INPUT POWER
SOURCE CAN BE
REMOVED
DIN
49.9k
L1, 10µH
CIN2
120µF
2.2µF
10k
D1
15V
RT
118k
5m
MN
MP
RSENSE1
L2
10µH
C1, 10µF
165k
14.3k
47nF
220nF
2.2nF
100pF
+
CIN1
22µF
×2
COUT
22µF
×2
•
RSENSE2
50m
VSYSTEM = VIN WHEN VIN IS PRESENT
10.5V WHEN VIN IS REMOVED
1k
1.2k
1.2k
1.2k
1.2k
1.2k
1.2k
CS1
60F
+
CS2
60F
+
CS3
60F
+
CS4
60F
+
CS5
60F
+
CS6
60F
+
5.1
5.1
4.7nF 4.7nF
2.2µF



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