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參數(shù)資料
| 型號(hào)： | LLT3837EFE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 110 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大小： | 255K |
| 代理商： | LLT3837EFE |
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LT3837
1
3837fa
47pF
2.2nF
10Ω
22μF
3k
22.1k
100k
BAS16
150k
12k
330Ω
15Ω
10Ω
100nH
8mΩ
Si7852DP
Si7336ADP
B0540W
1.37k
3.3nF
20k
1nF
1μF
0.1μF
2.2nF
BAT54
OSC
VC
FB
UVLO
PG
SENSE+
SENSE–
SG
SFST
tON
ENDLY
PGDLY
RCMP
CCMP
GND
VCC
LT3837
86.6k
10μF
VIN
15k
10k
3837 TA01
47μF
3
220μF
OUTPUT 3.3V/10A
2N3906
FMMT718
FMMT618
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Isolated No-Opto
Synchronous Flyback Controller
The LT3837 is an isolated switching regulator controller
designed for medium power yback topologies. A typical
application is 10W to 60W with the part powered from a
DC supply.
The LT3837 is a current mode controller that regulates an
output voltage based on sensing the secondary voltage
via a transformer winding during yback. This allows for
tight output regulation without the use of an optoisolator,
improving dynamic response and reliability. Synchronous
rectication increases converter efciency and improves
output cross regulation in multiple output converters.
The LT3837 operates in forced continuous conduction
mode which improves cross regulation in multiple winding
applications. Switching frequency is user programmable
and can be externally synchronized. The part also has load
compensation, undervoltage lockout and soft-start circuitry.
The LT3837 is available in a thermally enhanced 16-pin
TSSOP package.
9V –18V to 3.3V at 10A Isolated Converter
n Senses Output Voltage Directly from Primary Side
Winding—No Optoisolator Required
n Synchronous Driver for High Efciency
n Supply Voltage Range 4.5V to 20V
n Accurate Regulation Without User Trims
n Programmable Switching Frequency from
50kHz to 250kHz
n Synchronizable
n Load Compensation
n Undervoltage Lockout
n Available in a Thermally Enhanced 16-Lead
TSSOP Package
n Isolated Medium Power (10W to 60W) Supplies
n Instrumentation Power Supplies
n Isolated Medical Supplies
LOAD CURRENT (A)
2
78
76
EFFICIENCY
(%)
80
84
86
88
3
7
9
3837 TA01b
82
90
6
4
5
810
9VIN
18VIN
LOAD CURRENT (A)
3.00
OUTPUT
(V)
3.10
3.30
3.40
3.50
3.60
3837 TA01c
3.20
2
3
7
9
6
4
5
810
9VIN
18VIN
Efciency vs Load Current
Regulation vs Load Current
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6498466, 5841643.
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