參數(shù)資料
型號: LTC3766IGN#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 316 kHz SWITCHING FREQ-MAX, PDSO28
封裝: 0.150 INCH, LEAD FREE, PLASTIC, SSOP-28
文件頁數(shù): 1/60頁
文件大小: 607K
代理商: LTC3766IGN#TRPBF
LTC3766
1
3766f
TYPICAL APPLICATION
FEATURES
DESCRIPTION
High Efficiency,
Secondary-Side Synchronous
Forward Controller
The LTC3766 is a PolyPhase-capable secondary-side
controllerforsynchronousforwardconverters.Whenused
in conjunction with the LTC3765 active-clamp forward
controller and gate driver, the part creates a complete
isolated power supply that combines the power of multi-
phase operation with the speed of secondary-side control.
The LTC3766 has been designed to simplify the design of
active clamp forward converters. Working in concert with
the LTC3765, the LTC3766 forms a robust, self-starting
converter that eliminates the need for the separate bias
regulatorthatiscommonlyusedinsecondary-sidecontrol
applications. A precision current-limit coupled with clean
start-up into a pre-biased load make the LTC3766 an excel-
lent choice for high-power battery charger applications.
TheLTC3766providesextensiveremotesensingandoutput
protection features, while Direct Flux Limit guarantees no
transformer saturation without compromising transient
response. A linear regulator controller and internal bypass
LDO are also provided to simplify the generation of the
secondary-side bias voltage.
36V-72V to 5V/15A Active Clamp Isolated Forward Converter
APPLICATIONS
n
Direct Flux Limit Guarantees No Saturation
n
Fast and Accurate Average Current Limit
n
Clean Start-Up Into Pre-Biased Output
n
Secondary-Side Control for Fast Transient Response
n
Simple, Self-Starting Architecture
n
Synchronous MOSFET Reverse Current Limit
n
PolyPhase Operation Eases High-Power Design
n
True Remote Sense Differential Amplifier
n
Remote Sense Reverse Protection
n
High Voltage Linear Regulator Controller
n
Internal LDO Powers Gate Drive from VOUT
n
Overtemperature/Overvoltage Protection
n
Low Profile 4mm
× 5mm QFN and Narrow 28-Lead
SSOP Packages
n
Isolated 48V Telecommunication Systems
n
Isolated Battery Chargers
n
Automotive and Military Systems
n
Industrial, Avionics and Heavy Equipment
L
, LT, LTC, LTM, PolyPhase, Linear Technology and the Linear logo are registered and Direct
Flux Limit is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 7200014 and 6144194.
Other patents pending.
FG
IS–
IS+
PT+
FB
ITH
PT
SS
SW SG
GND PGND
SGD
FGD MODE
RUN VIN NDRV
LTC3766
VCC
RUN
Si3437DV
(SOT23)
15m
0.5W
3m
2W
VCC
IN+
IN
FS/UV
SSFLT
NDRV PG
RCORE
DELAY
SGND
14k
18.2k
EFFICIENCY: 94% AT 48VIN/15AOUT
15k
26.1k
33nF
22.1k
17.8k
3766 TA01
604
4.42k
0.1F
2:1
6:2
10.5k
15.0k
365k
IPK
200k
Si3440DV
–VIN
+VIN
36V TO 72V
FDMS86201
BSC0901NS
SiR414DP
33nF
4.7F
LTC3765
PGND
IS+ IS– AG
1
168
ISMAG
FS/SYNC VS+ VS–
1.0F
2.2nF
250VAC
33nF
200V
47pF
470pF
2.2F
100V
×3
220F
6.3V
×2
1.4H
+VOUT
5V
15A
–VOUT
100nF
200V
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