参数资料
型号: LTC3765EMSE#PBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封装: LEAD FREE, PLASTIC, MSOP-16
文件页数: 1/24页
文件大小: 265K
代理商: LTC3765EMSE#PBF
LTC3765
1
3765f
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Active Clamp Forward
Controller and Gate Driver
The LTC3765 is a start-up controller and gate driver
for use in a self-starting secondary-side control forward
converter. When combined with the LTC3766 secondary-
side synchronous forward controller, a complete isolated
power supply is created using a minimum of discrete
parts. A proprietary scheme is used to multiplex gate
drive signals and bias power across the isolation barrier
through a small pulse transformer. The LTC3765 contains
an on-chip bridge rectifier that extracts gate drive bias
powerfromthispulsetransformer,eliminatingtheneedfor
a separate bias supply. A precision undervoltage lockout
circuit and linear regulator controller ensure a quick and
well-controlled start-up.
TheLTC3765includesanactiveclampoutputfordrivingan
external PMOS, as well as an adjustable delay to optimize
efficiency. The active clamp architecture reduces voltage
stress on the main power switch, and provides the highest
possible efficiency. Overcurrent protection and the Direct
Flux Limit guarantee no transformer saturation without
compromising transient response.
36V-72V to 5V/15A Active Clamp Isolated Forward Converter
APPLICATIONS
n
Supports Self-Starting Secondary-Side Control
n
Direct Flux Limit Guarantees No Saturation
n
Active Clamp Drive with Delay Adjustment
n
On-Chip Bridge Rectifier Eliminates Need for
Separate Gate Drive Bias Supply
n
Wide Input Supply Range: 8V and Up (Limited Only
by External Components)
n
Linear Regulator Controller for Fast Start-Up
n
High Speed Gate Drivers
n
Precision UVLO with Adjustable Hysteresis
n
Overcurrent Protection
n
Overtemperature Protection
n
Adjustable Start-Up Frequency and Soft-Start
n
Tiny 16-Lead MSOP Package
n
Isolated Battery Chargers
n
Isolated 48V Telecommunication Systems
n
Servers and Embedded Computing
n
Automotive and Heavy Equipment
L
, LT, LTC, LTM, PolyPhase, Linear Technology and the Linear logo are registered trademarks
and Direct Flux Limit, ThinSOT and No RSENSE are trademarks 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
(SOT-23)
15m
0.5W
3m
2W
VCC
IN+
IN
FS/UV
SSFLT
NDRV PG
RCORE
DELAY
SGND
14k
18.2k
100
L1: PULSE PA1393.152
T1: PULSE PA0810
T2: PULSE PA0297
15k
26.1k
33nF
22k
17.8k
3765 TA01
604
4.42k
0.1F T2
2:1
T1
6:2
10.5k
15k
365k
1/8W
IPK
100k
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
1nF
2.2nF
250VAC
33nF
200V
47pF
470pF
2.2F
100V
×3
220F
6.3V
×2
L1
1.4H
VOUT+
5V
15A
VOUT–
100nF
200V
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相关代理商/技术参数
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