參數(shù)資料
型號(hào): LT1680I
廠商: Linear Technology Corporation
英文描述: High Power DC/DC Step-Up Controller
中文描述: 高功率DC / DC升壓控制器
文件頁(yè)數(shù): 1/16頁(yè)
文件大?。?/td> 322K
代理商: LT1680I
1
LT1680
High Power DC/DC
Step-Up Controller
I
High Voltage: Operation Up to 60V Max
I
High Current: N-Channel Drive Handles Up to
10,000pF Gate Capacitance
I
Programmable Average Current Limiting
I
5V Reference Output with 10mA External
Loading Capability
I
Fixed Frequency Current Mode Operation
I
Oscillator Synchronizable Up to 200kHz
I
Undervoltage Lockout with Hysteresis
I
Programmable Start Inhibit for Power Supply
Sequencing and Protection
I
User Adjustable Slope Compensation
FEATURES
DESCRIPTIO
N
U
The LT
1680 is a high power, current mode switching
power supply controller optimized for boost topologies.
The IC drives N-channel MOSFET switches for DC/DC
converters in applications up to 60V input. A high current
gate drive output handles up to 10,000pF gate capaci-
tance, enabling the construction of high power DC/DC
converters. Current sense common mode range up to 60V
allows current sensing to be referenced to the input
supply, eliminating the need for sense blanking circuits.
The LT1680 incorporates programmable average current
limiting allowing accurate limiting of DC current in the
magnetics, independent of ripple current . User adjustable
slope compensation provides stable operation at duty
cycles up to 90%.
The LT1680 operating frequency is programmable and
can be synchronized up to 200kHz. Minimum off-time
operation provides switch protection. The IC also incorpo-
rates a soft start feature that is gated by both shutdown
and undervoltage lockout conditions.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO
S
U
I
High Power Single Board Systems
I
Distributed Power Converters
I
Industrial Control Systems
I
Lead-Acid Battery Back-Up Systems
I
Automotive and Heavy Equipment
TYPICAL APPLICATIO
N
U
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SL/ADJ
C
T
I
AVG
SS
V
C
SGND
V
FB
V
REF
5V
REF
SYNC
12V
IN
GATE
PGND
RUN/SHDN
SENSE
SENSE
+
+
LT1680
MBR0520
R
CT
15k
R7
2k
R
VC
4.7k
1N914
C
CT
1nF
C3 2.2nF
C
VC
4.7nF
C4 0.22
μ
F
C2
1
μ
F
C11 1nF
1680 TA01
C6 0.1
μ
F
R6
75k
R9
100k
C12
1
μ
F
M1
IRFZ44
×
3
D1
MBR20100CT
×
2
+
C
IN
680
μ
F
25V
×
4
C
OUT
680
μ
F
63V
×
3
V
48V
5.2A
L1
25
μ
H
R
0.005
12V
10V TO 15V
24A (DC)
+
L1: Kool M
μ
, 18T #14 ON 77314-A7
Kool M
μ
IS A REGISTERED TRADEMARK OF MAGNETICS, INC.
12V to 48V, 250W Boost
OUTPUT POWER (W)
0
E
90
95
100
200
1680 TA02
85
80
75
50
100
150
250
V
OUT
= 48V
Efficiency vs Output Power
相關(guān)PDF資料
PDF描述
LT1680IN High Power DC/DC Step-Up Controller
LT1680ISW High Power DC/DC Step-Up Controller
LT1680 High Power DC/DC Step-Up Controller(大功率,DC/DC步升轉(zhuǎn)換器)
LT1683IG Ultralow Noise Push-Pull DC/DC Controller
LT1683 Ultralow Noise Push-Pull DC/DC Controller
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