900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC3766 Datasheet

Secondary-Side Synchronous Forward Controller

No Preview Available !

LTC3766
FEATURES
High Efficiency,
Secondary-Side Synchronous
Forward Controller
DESCRIPTION
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
APPLICATIONS
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.
The LTC®3766 is a PolyPhase-capable secondary-side
controller for synchronous forward converters. When used
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
regulator that is commonly used in secondary-side control
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.
The LTC3766 provides extensive remote sensing and output
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.
TYPICAL APPLICATION
36V – 72V to 5V/15A Active Clamp Isolated Forward Converter
+VIN
36V TO 72V
2.2µF
100V
×3
–VIN
365k
4.7µF
15.0k
6:2
••
FDMS86201
15mΩ
0.5W
33nF
200V
168Ω
100nF
200V
3mΩ
2W
BSC0901NS
1.4µH
EFFICIENCY: 94% AT 48VIN/15AOUT
SiR414DP
200k
Si3440DV
Si3437DV 2.2nF
(SOT23) 250VAC
NDRV PG IS+ IS– AG ISMAG
RUN IN+
VCC LTC3765 IN
SSFLT
RCORE
FS/UV
DELAY SGND PGND
33nF 10.5k
14k
0.1µF
1.0µF
2:1
••
18.2k
FG SW SG RUN VIN NDRV VCC FS/SYNC VS+ VS–
IS–
IS+
PT+
LTC3766
FB
ITH
PT
SS
GND PGND IPK
SGD FGD MODE
33nF 26.1k 15k 22.1k 47pF
4.42k
604Ω
470pF
17.8k
For more information www.linear.com/LTC3766
+VOUT
5V
15A
220µF
6.3V
×2
–VOUT
3766 TA01
3766fc
1


Linear Technology Electronic Components Datasheet

LTC3766 Datasheet

Secondary-Side Synchronous Forward Controller

No Preview Available !

LTC3766
ABSOLUTE MAXIMUM RATINGS (Note 1)
VCC Voltage..................................................–0.3V to 12V
VIN Voltage.................................................. –0.3V to 33V
RUN Voltage............................................... –0.3V to 33V
SW
Low Impedance Source............................. –5V to 40V
Current Fed........... 2mA DC or 0.2A for <1μs Into Pin*
IVTAHU,XI,SV+S, +R,EVGSSD, VVSoOlUtaTg, eNsD..R..V....V..o..l.t.a..g..e.s................–. –00.3.3VVtoto166VV
PHASE Voltage.............................................. –0.3V to 6V
IS–, SGD, FGD Voltages................................–0.3V to 12V
FS/SYNC, FB, MODE Voltages......................–0.3V to 12V
VSEC Voltage................................................. –0.3V to 3V
IPK, SS Voltages............................................ –0.3V to 4V
Operating Junction Temperature Range (Notes 2,3)
LTC3766E, LTC3766I.......................... –40°C to 125°C
LTC3766H........................................... –40°C to 150°C
LTC3766MP........................................ –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec )
GN Package ...................................................... 300°C
*The LTC3766 contains an internal 50V clamp that limits the voltage on the
SW pin.
PIN CONFIGURATION
SG 1
FG 2
VSEC 3
MODE 4
PHASE 5
FB 6
ITH 7
RUN 8
SS 9
IPK
VSOUT
VS+
VS–
GND
10
11
12
13
14
TOP VIEW
28 VCC
27 PGND
26 PT+
25 PT
24 VAUX
23 SW
22 VIN
21 NDRV
20 FGD
19 SGD
18 IS+
17 IS–
16 REGSD
15 FS/SYNC
GN PACKAGE
28-LEAD NARROW PLASTIC SSOP
TJMAX = 125°C, θJA = 95°C/W
TOP VIEW
28 27 26 25 24 23
MODE 1
22 PT
PHASE 2
FB 3
21 VAUX
20 SW
ITH 4
RUN 5
29 19 VIN
GND 18 NDRV
SS 6
17 FGD
IPK 7
VSOUT 8
9
16 SGD
15 IS+
10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
3766fc
2 For more information www.linear.com/LTC3766


Part Number LTC3766
Description Secondary-Side Synchronous Forward Controller
Maker Linear Technology
Total Page 30 Pages
PDF Download

LTC3766 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 LTC3765 Active Clamp Forward Controller and Gate Driver
Linear Technology Corporation
2 LTC3766 Secondary-Side Synchronous Forward Controller
Linear Technology
3 LTC3769 60V Low IQ Synchronous Boost Controller
Linear Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy