Linear Technology LTC3810-5, Техническое описание

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LTC3810-5
5
38105fd
Load Transient Response Start-Up
Short-Circuit/
Fault Timeout Operation
Short-Circuit/
Foldback Operation Tracking Pulse Skip Mode Operation
Efficiency vs Input Voltage Efficiency vs Load Current Frequency vs Input Voltage
Typical perForMance characTerisTics
50µs/DIV
V
OUT
100mV/DIV
I
OUT
5A/DIV
38105 G01
V
IN
= 48V
0A TO 5A LOADSTEP
FRONT PAGE CIRCUIT
500µs/DIV
INTV
CC
5V/DIV
V
OUT
5V/DIV
V
IN
50V/DIV
I
L
5A/DIV
38105 G02
V
IN
= 48V
I
LOAD
= 1A
MODE/SYNC = 0V
FRONT PAGE CIRCUIT
INTV
CC
10ms/DIV
V
OUT
10V/DIV
SS/TRACK
4V/DIV
I
L
5A/DIV
38105 G03
V
IN
= 48V
R
SHORT
= 0.1Ω
FRONT PAGE CIRCUIT
200µs/DIV
V
OUT
5V/DIV
V
FB
0.5V/DIV
I
L
5A/DIV
38105 G04
V
IN
= 48V
FRONT PAGE CIRCUIT
500µs/DIV
38105 G05
V
OUT
5V/DIV
SS/TRACK
0.5V/DIV
V
FB
0.5V/DIV
I
L
5A/DIV
V
IN
= 48V
I
LOAD
= 1A
MODE/SYNC = 0V
FRONT PAGE CIRCUIT
SS/TRACK
V
FB
V
OUT
100mV/DIV
I
TH
0.5V/DIV
20µs/DIV 38105 G06
I
L
2A/DIV
V
IN
= 48V
I
OUT
= 100mA
MODE/SYNC = INTV
CC
FRONT PAGE CIRCUIT
INPUT VOLTAGE (V)
10 20
70
EFFICIENCY (%)
90
100
30 50 60
38105 G07
80
40 70 80
I
OUT
= 5A
I
OUT
= 0.5A
V
OUT
= 12V
Si7852 MOSFETs
f = 250kHz
LOAD CURRENT (A)
0
70
EFFICIENCY (%)
75
80
85
90
100
1 2 3 4
38105 G08
5 7 6
95
V
OUT
= 5V
Si7850 MOSFETs
MODE/SYNC = INTV
CC
f = 250kHz
V
IN
= 12V
V
IN
= 36V
V
IN
= 60V
INPUT VOLTAGE (V)
10 20
230
FREQUENCY (kHz)
250
280
30 50 60
38105 G09
240
270
260
40 70 80
I
OUT
= 0A
I
OUT
= 5A
MODE/SYNC = 0V
FRONT PAGE CIRCUIT