LTC3803 Datasheet, PDF (12/12 Pages) Linear Technology – Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

LTC3803
TYPICAL APPLICATIO
PRIMARY SIDE
10V, 100mA
OUTPUT
2W Housekeeping Telecom Converter
BAS516
T1
•
2.2µF
V_IN
36V TO 75V
1nF
22k
806Ω
1µF
BAS516
9.2k
BAS516
1k
1
LTC3803
6
I_TH/RUN NGATE
2
GND
V_CC ⁵
3
V_FB
4
SENSE
•
220k _•
2.2µF
SECONDARY SIDE
10V, 100mA
OUTPUT
SECONDARY
SIDE GROUND
FDC2512
5.6k
1µF
T1: PULSE ENGINEERING PA0648
OR TYCO TT18698
0.1Ω
PRIMARY GROUND
3803 TA03
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT^®1425
Isolated Flyback Switching Regulator
with No External Power Devices
No Optoisolator or “Third Winding” Required, Up to 6W Output
LT1725
General Purpose Isolated Flyback Controller
No Optoisolator Required, V_IN and V_OUT Limited Only by External
Power Components
LTC1772
SOT-23 Constant Frequency Current Mode Step-Down
DC/DC Controller
550kHz Switching Frequency, 2.4V to 9.8V V_IN Range
LTC1871
Wide Input Range, No R_SENSE^TM Current Mode
Flyback, Boost and SEPIC Controller
Adjustable Switching Frequency, Programmable Undervoltage
Lockout, Optional Burst Mode^® Operation at Light Load
LTC1872
SOT-23 Constant Frequency Current Mode Boost DC/DC 550kHz Switching Frequency, 2.4V to 9.8V V_IN Range
Controller
LT1950
Current Mode PWM Controller
Controller for Forward Converters from 30W to 300W
LT3420
Photoflash Capacitor Charger with Automatic Refresh
Specialized Flyback Charges High Voltage Photoflash Capacitors
Quickly and Efficiently
Burst Mode is a registered trademark of Linear Technology Corporation. No R_SENSE is a trademark of Linear Technology Corporation.
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
3803i
LT/TP 0803 1K • PRINTED IN THE USA
© LINEAR TECHNOLOGY CORPORATION 2003