MAX13256 Datasheet, PDF (6/17 Pages) Maxim Integrated Products – 36V H-Bridge Transformer Driver for Isolated Supplies Integrated System Protection

MAX13256
36V H-Bridge Transformer
Driver for Isolated Supplies
Typical Operating Characteristics (continued)
(V_DD = 24V, T_A = +25NC, unless otherwise noted.)
ISOLATED OUTPUT VOLTAGE
vs. LOAD CURRENT
10
20
9
VDD = 24V
18
4:1 TRANSFORMER
8
FULL-WAVE RECTIFIER
16
7
NO SNUBBER
14
6
12
5
10
4
8
3
6
2
4
1
2
0
0
0
400 800 1200 1600 2000
0
I_LOAD (mA)
ISOLATED OUTPUT VOLTAGE
vs. LOAD CURRENT
VDD = 24V
4:1 TRANSFORMER
VOLTAGE DOUBLER
NO SNUBBER
100 200 300 400 500
ILOAD (mA)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
V_DD = 12V
VDD = 24V
VDD = 8V VDD = 16V
1:1 TRANSFORMER
FULL-WAVE RECTIFIER
NO SNUBBER
50 100 150 200 250 300 350 400
ILOAD (mA)
EFFICIENCY vs. LOAD CURRENT
100
90
VDD = 16V VDD = 24V
80
70
60
50
VDD = 8V
40
VDD = 12V
30
20 4:1 TRANSFORMER
10 ^{FULL-WAVE RECTIFIER}
NO SNUBBER
0
0 250 500 750
1000 1250 1500
ILOAD (mA)
EFFICIENCY vs. LOAD CURRENT
100
VDD = 28V
90
80
70
VDD = 36V
60
VDD = 32V
50
40
30
20 1:1 TRANSFORMER
10
FULL-WAVE RECTIFIER
WITH SNUBBER
0
0 50 100 150 200 250 300 350 400
ILOAD (mA)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
VDD = 36V
VDD = 28V _{VDD = 32V}
4:1 TRANSFORMER
FULL-WAVE RECTIFIER
WITH SNUBBER
250 500 750 1000 1250 1500
ILOAD (mA)
MAXIMUM OUTPUT CURRENT
vs. TEMPERATURE
1000
VDD = 16V VDD = 8V
900
MAXIMUM OUTPUT CURRENT
vs. TEMPERATURE
900
VDD = 16V _{VDD = 8V}
800
800
VDD = 24V _{VDD = 36V}
700
700
VDD = 24V _{VDD = 36V}
600
600
500
500
MULTILAYER BOARD
400
-40 -25 -10 5 20 35 50 65 80 95 110 125
TA (°C)
400
SINGLE-LAYER BOARD
300
-40 -25 -10 5 20 35 50 65 80 95 110 125
TA (°C)
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