LT1619_ Просмотр технического описания (PDF) - Linear Technology
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LT1619_ Datasheet PDF : 32 Pages
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LTC1871-7
TYPICAL APPLICATIO S
A Small, Nonisolated 12V Flyback Telecom Housekeeping Supply
VIN
36V TO 72V
R2
26.7k
1%
C1
1nF
OPTIONAL
R1
604k
1%
UV+ = 31.8V
UV– = 29.5V
CIN
2.2µF
100V
X7R
R5
100k
D1
9.1V
CC2
47pF
RC
3.4k
CC1
2.2nF
R3
12.4k
1%
R4
110k
1%
RT
120k
RUN
SENSE
ITH
VIN
LTC1871-7
FB
FREQ
INTVCC
GATE
MODE/SYNC GND
f = 200kHz
Q1
R6
10Ω
D3
T1
1, 2, 3
(SERIES)
4, 5, 6
(PARALLEL)
D2
C2
4.7µF
X5R
M1
C3
0.1µF
X5R
RS
0.12Ω
COUT
47µF
X5R
VOUT
12V
0.4A
T1: COILTRONICS VP1-0076
M1: FAIRCHILD FDC2512 (150V, 0.5Ω)
Q1: ZETEX FMMT625 (120V)
D1: ON SEMICONDUCTOR MMBZ5239BLT1 (9.1V)
D2: ON SEMICONDUCTOR MMSD4148T11
D3: INTERNATIONAL RECTIFIER 10BQ060
18717 TA05
RELATED PARTS
PART NUMBER
LT®1619
LTC1624
DESCRIPTION
Current Mode PWM Controller
Current Mode DC/DC Controller
LTC1700
LTC1871
LTC1872
LT1930
LT1931
LTC3401/LTC3402
LTC3803
No RSENSE Synchronous Step-Up Controller
Wide Input Range, No RSENSE Controller
SOT-23 Boost Controller
1.2MHz, SOT-23 Boost Converter
Inverting 1.2MHz, SOT-23 Converter
1A/2A 3MHz Synchronous Boost Converters
SOT-23 Flyback Controller
LTC3806
Synchronous Flyback Controller
COMMENTS
300kHz Fixed Frequency, Boost, SEPIC, Flyback Topology
SO-8; 300kHz Operating Frequency; Buck, Boost, SEPIC Design;
VIN Up to 36V
Up to 95% Efficiency, Operation as Low as 0.9V Input
Operation as Low as 2.5V Input, Boost Flyback,SEPIC
Delivers Up to 5A, 550kHz Fixed Frequency, Current Mode
Up to 34V Output, 2.6V ≤ VIN ≤ 16V, Miniature Design
Positive-to-Negative DC/DC Conversion, Miniature Design
Up to 97% Efficiency, Very Small Solution, 0.5V ≤ VIN ≤ 5V
Adjustable Slope Compensation, Internal Soft-Start, Current
Mode 200kHz Operation
High Efficiency, Improves Cross Regulation in Multiple Output
Designs, Current Mode, 3mm × 4mm 12-Pin DFN Package
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q www.linear.com
18717f
LT/TP 0104 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002
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