ISL78220 Datasheet, PDF (10/22 Pages) Intersil Corporation – 6-Phase Interleaved Boost PWM Controller with Light Load Efficiency Enhancement

ISL78220
Typical Performance Curves
0.98
WITH PHASE DROPPING
0.97
0.96
WITHOUT PHASE DROPPING
0.95
0.94
0.93
0.92
0.91
0.90
6V INPUT, 12V OUTPUT
0.89
SYNCHRONOUS BOOST
0.88
0
5
10
15
20
25
30
OUTPUT CURRENT (A)
FIGURE 2. 6V INPUT EFFICIENCY vs OUTPUT CURRENT vs PHASE
DROPPING MODE
0.99
0.98
0.97
WITH PHASE DROPPING
0.96
WITHOUT PHASE DROPPING
0.95
0.94
0.93
0.92
0.91
0.90
0.89
0
11V INPUT, 12V OUTPUT
SYNCHRONOUS BOOST
5
10
15
20
25
30
OUTPUT CURRENT (A)
FIGURE 3. 11V INPUT EFFICIENCY vs OUTPUT CURRENT vs
PHASE DROPPING MODE
12.5
12.4
12.3
12.2
12.1
12.0
11.9
11.8
11.7
11.6
11.5
0
6V INPUT
5
10
15
20
25
30
OUTPUT CURRENT (A)
FIGURE 4. OUTPUT VOLTAGE vs OUTPUT CURRENT
12.5
12.4
12.3
12.2
12.1
12.0
11.9
11.8
11.7
11.6
11.5
6
30A OUTPUT
7
8
9
10
11
INPUT VOLTAGE (V)
FIGURE 5. OUTPUT VOLTAGE vs INPUT VOLTAGE
5V
50mV
PHASE 1
VOUT
(AC-COUPLED)
6V INPUT, 30A OUTPUT
1µs/DIV
FIGURE 6. FULL LOAD OUTPUT RIPPLE
100mV
VOUT
(AC-COUPLED)
6V INPUT, 0 TO 30A TO 0 STEP LOAD
2ms/DIV
FIGURE 7. FULL STEP LOAD TRANSIENT
10
FN7688.0
December 15, 2011