參數(shù)資料
型號： LTC3728
廠商： Linear Technology Corporation
英文描述： 2-Phase Step-Up DC/DC Controller
中文描述： 2相升壓型DC / DC控制器
文件頁數(shù)： 1/16頁
文件大?。?/td> 200K
代理商： LTC3728
LT3782
1
3782fa
APPLICATIU
TYPICAL APPLICATIO
U
DESCRIPTIO
The LT
3782 is a current mode two phase step-up DC/DC
converter controller. Its high switching frequency (up to
500kHz) and 2-phase operation reduce system filtering
capacitance and inductance requirements.
With 10V gate drive (V
CC
≥
13V) and 4A peak drive current,
the LT3782 can drive most industrial grade high power
MOSFETs with high efficiency. For synchronous applica-
tions, the LT3782 provides synchronous gate signals with
programmable falling edge delay to avoid cross conduc-
tion when using external MOSFET drivers. Other features
include programmable undervoltage lockout, soft-start,
current limit, duty cycle clamp (50% or higher) and slope
compensation.
The LT3782 is available in a thermally enhanced 28-lead
SSOP package.
U
FEATURES
■
Industrial Equipment
■
Telecom Infrastructure
■
Interleaved Isolated Power Supply
■
2-Phase Operation Reduces Required Input and
Output Capacitance
■
Programmable Switching Frequency:
150kHz to 500kHz
■
6V to 40V Input Range
■
10V Gate Drive with V
CC
≥
13V
■
High Current Gate Drive (4A)
■
Programmable Soft-Start and Current Limit
■
Programmable Slope Compensation for
High Noise Immunity
■
MOSFET Gate Signals with Programmable
Falling Edge Delay for External Synchronous
Drivers
■
Programmable Undervoltage Lockout
■
Programmable Duty Cycle Clamp (50% or Higher)
■
Thermally Enhanced 28-Lead SSOP Package
2-Phase Step-Up
DC/DC Controller
50V 4A Boost Converter
3782 TA01
6.8nF
13k
0.1
μ
F
10nF
C
IN
10
μ
F
50V
2x
R
80k
R
SLOPE
R
S1
0.004
M1
Si7852dp
2x
1
μ
F
R8
274k
R6
825k
C
OUT2
220
μ
F
V
50V, 4A
V
IN
10V TO 36V
+
C3
2
μ
F
+
R
0.004
LT3782
V
CC
RUN
SLOPE
DELAY
DCL
R
SET
SS
V
C
GBIAS2
GBIAS
BGATE1
V
EE1
BGATE2
V
EE2
SENSE1
+
SENSE1
–
SENSE2
+
SENSE2
–
FB
GND
M2
Si7852dp
2x
GBIAS1
10
10nF
10
R
475k
L1
D1
30BQ060
D2
30BQ060
L2
100pF
R
24.9k
C
OUT1
10
F
50V
2x
L1, L2: PB2020.223
C
IN
, C
OUT1
: X7R, TDK
Efficiency and Power Loss
vs Load Current
I
OUT
(A)
0
E
4
3782 TA01b
P
18
15
12
9
6
3
0
1
2
3
5
V
IN
= 12V
V
IN
= 12V
V
IN
= 24V
V
IN
= 24V
EFFICIENCY
POWER LOSS
97
93
95
91
89
87
85
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6144194.
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