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LT3758 bảng dữ liệu(PDF) 1 Page - Linear Technology

tên linh kiện LT3758
Giải thích chi tiết về linh kiện  High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller
PDF  36 Pages
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nhà sản xuất  LINER [Linear Technology]
Trang chủ  http://www.linear.com
Logo LINER - Linear Technology

LT3758 bảng dữ liệu(HTML) 1 Page - Linear Technology

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LT3758
1
3758f
n
Wide Input Voltage Range: 5.5V to 100V
n
Positive or Negative Output Voltage Programming
with a Single Feedback Pin
n
Current Mode Control Provides Excellent Transient
Response
n
Programmable Operating Frequency (100kHz to
1MHz) with One External Resistor
n
Synchronizeable to an External Clock
n
Output Overvoltage Protection
n
Low Shutdown Current < 1μA
n
Internal 7.2V Low Dropout Voltage Regulator
n
Programmable Input Undervoltage Lockout with
Hysteresis
n
Programmable Soft-Start
n
Small 10-Lead DFN (3mm
× 3mm) and
MSOPE Packages
TYPICAL APPLICATION
DESCRIPTION
High Input Voltage,
Boost, Flyback, SEPIC and
Inverting Controller
The LT
®3758 is a wide input range, current mode, DC/DC
controller which is capable of generating either positive or
negative output voltages. It can be configured as either a
boost, flyback, SEPIC or inverting converter. The LT3758
drives a low side external N-channel power MOSFET from
an internal regulated 7.2V supply. The fixed frequency,
current-mode architecture results in stable operation over
a wide range of supply and output voltages.
The operating frequency of LT3758 can be set with an
external resistor over a 100kHz to 1MHz range, and can
be synchronized to an external clock using the SYNC pin.
A minimum operating supply voltage of 5.5V, and a low
shutdown quiescent current of less than 1μA, make the
LT3758 ideally suited for battery-powered systems.
The LT3758 features soft-start and frequency foldback
functions to limit inductor current during start-up and
output short-circuit.
The device is available in a small 10-lead DFN (3mm
× 3mm)
or MSOPE package.
12V Output Nonisolated Flyback Power Supply
FEATURES
APPLICATIONS
n
Automotive
n
Telecom
n
Industrial
SENSE
LT3758
VIN
DSN
VIN
36V TO
72V
CIN
2.2μF
100V
X7R
63.4k
200kHz
GATE
FBX
GND INTVCC
SHDN/UVLO
SYNC
RT
SS
VC
0.022μF
100V
T1
1,2,3
(SERIES)
4,5,6
(PARALLEL)
1M
44.2k
0.47μF
100pF
10k
10nF
0.030Ω
15.8k
1%
105k
1%
CVCC
4.7μF
10V
X5R
VOUT
12V
1.2A
3758 TA01
COUT
47μF
X5R
6.2k
D1
SW
M1
5.1Ω
1N4148
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Patents pending.


Số phần tương tự - LT3758

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