Linear Technology Analog Devices LTC3882-1 Datasheet page 10

LTC3882-1
TYPICAL PERFORMANCE CHARACTERISTICS
3-Phase DC Output Current
Sharing (Using D12S1R845A
Power Block
20
CHANNEL 1
18
CHANNEL 2
CHANNEL 3
16
14
12
10
8
6
4
2
0
0 10 20 30 40
TOTAL RAIL CURRENT (A)
Efficiency and Power Loss vs
Input Voltage
(1-Phase Using LTC4449)
100
V = 1.8V
O
98
96
94
92
90
88
86
84
POWER FET: BSC050N04LS G
82
SYNC FET: BSC010N04LS
80
5 10 15 20
V (V)
IN
3+1 Channel Crosstalk
(Using D12S1R845A Power
Blocks)
V
OUT0
(1-PHASE)
20mV/DIV
V
OUT1
(3-PHASE)
20mV/DIV
I
OUT1
10A/DIV
100µs/DIV
10
Load Step Transient Current
Sharing (Using FDMF6707B
DrMOS)
I
OUT
20A/DIV
V
OUT
20mV/DIV
I , I
L1 L2
10A/DIV
V
OUT
V
IN
SYNC = 500kHz
L = 320nH
50 60 70 80
38821 G09
3-Phase Transient Response
(Using D12S1R860A Power Block)
3.0
2.5
I
OUT
(10A/DIV)
2.0
1.5
V
OUT
(10mV/DIV)
1.0
0.5
V
OUT
0
V
IN
25 30
SYNC = 500kHz
L = 210nH
38821 G12
Load Step Transient Response
Using AVP
I
O
10A/DIV
25%
LOAD STEP
V
OUT
50mV/DIV
38821 G15
For more information
38821 G10
= 1V 5µs/DIV
= 12V
25mV
P-P
38821 G13
100µs/DIV
= 0.9V/90A
= 12V
38821 G16
200µs/DIV
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Load Dump Transient Current
Sharing (Using FDMF6707B
DrMOS)
I
OUT
20A/DIV
V
OUT
20mV/DIV
I , I
L1 L2
10A/DIV
V = 1V 5µs/DIV
OUT
V = 12V
IN
SYNC = 500kHz
L = 320nH
1-Phase Single Cycle Response
(Using D12S1R860A Power Block
with C = 6 × 100µF X5R 1210)
OUT
V
OUT
(20mV/DIV)
V
SW
(10V/DIV)
I
OUT
(10A/DIV)
2µs/DIV
V = 1V/25A
OUT
V = 12V
IN
SYNC = 1MHz
L = 210nH
Line Step Transient Response
(1-phase Using LTC4449)
7V
V
IN
2V/DIV
1.8V
V
OUT
10mV/DIV
200µs/DIV
38821 G11
38821 G14
38821 G17
Rev A