MAX13256 Datasheet, PDF (5/17 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
(V_DD = 24V, T_A = +25NC, unless otherwise noted.)
SUPPLY CURRENT
vs. EXTERNAL CLOCK FREQUENCY
10
9
8
7
6
5
ST1/ST2 SWITCHING FREQUENCY
vs. TEMPERATURE
600
550
500
450
4
400
3
2
1
0
200
NO LOAD
500 800 1100 1400 1700 2000
EXTERNAL CLOCK FREQUENCY (kHz)
350
CLK = GND
300
-40 -25 -10 5 20 35 50 65 80 95 110 125
TA (°C)
NORMALIZED CURRENT-LIMIT
THRESHOLD vs. TEMPERATURE
1.10
1.08
1.06
ST1/ST2 OUTPUT-VOLTAGE LOW
vs. SINK CURRENT
600
500
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
-40 -25 -10 5 20 35 50 65 80 95 110 125
T_A (°C)
400
300
200
100
0
0 100 200 300 400 500 600 700 800
I_SINK (mA)
FAULT OUTPUT-VOLTAGE LOW
vs. SINK CURRENT
400
30
350
29
28
300
27
250
26
200
25
150
24
23
100
22
50
21
0
0
2
4
6
8
10
I_SINK (mA)
20
0
CURRENT-LIMIT THRESHOLD
vs. RLIM
700
600
500
400
300
200
100
1000 1400 1800 2200 2600 3000
RLIM (I)
ST1/ST2 OUTPUT-VOLTAGE HIGH
vs. SOURCE CURRENT
24.1
24.0
23.9
23.8
23.7
23.6
23.5
23.4
23.3
23.2
23.1
0
100 200 300 400 500 600 700 800
ISOURCE (mA)
ISOLATED OUTPUT VOLTAGE
vs. LOAD CURRENT
VDD = 24V
1:1 TRANSFORMER
FULL-WAVE RECTIFIER
NO SNUBBER
100 200 300 400 500
I_LOAD (mA)
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