ISL78225 Datasheet, PDF (10/21 Pages) Intersil Corporation – 4-Phase Interleaved Boost PWM Controller with Light Load Efficiency Enhancement

ISL78225
Typical Performance Curves
0.98
WITH PHASE DROPPING
0.93
WITHOUT PHASE DROPPING
0.88
0.98
WITH PHASE DROPPING
WITHOUT PHASE DROPPING
0.93
0.88
0.83
0.83
0.78
10V INPUT, 36V OUTPUT
SYNCHRONOUS BOOST
0.73
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
FIGURE 2. 10V INPUT EFFICIENCY vs OUTPUT CURRENT vs PHASE
DROPPING MODE
0.78
16V INPUT, 36V OUTPUT
SYNCHRONOUS BOOST
0.73
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
FIGURE 3. 16V INPUT EFFICIENCY vs OUTPUT CURRENT vs PHASE
DROPPING MODE
36.5
36.4
36.3
36.2
36.1
36.0
35.9
35.8
35.7
35.6
10V INPUT
35.5
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
FIGURE 4. OUTPUT VOLTAGE vs OUTPUT CURRENT
36.5
36.4
36.3
36.2
36.1
36.0
35.9
35.8
35.7
35.6
10A OUTPUT
35.5
10
11
12
13
14
15
16
INPUT VOLTAGE (V)
FIGURE 5. OUTPUT VOLTAGE vs INPUT VOLTAGE
C1 = PHASE 1, 20V/DIV
C1 = PHASE 1, 20V/DIV
C4 = VOUT (AC-COUPLED), 100mV/DIV
10V INPUT, 36V @ 10A OUTPUT
1µs/DIV
FIGURE 6. FULL LOAD OUTPUT RIPPLE
C4 = VOUT (AC-COUPLED), 100mV/DIV
10V INPUT, 0 TO 10A TO 0 STEP LOAD
2ms/DIV
FIGURE 7. FULL STEP LOAD TRANSIENT
10
FN7909.0
December 15, 2011