The maximum recommended average power safe
operating area (SOA) at each Vin is determined by the lower value of the 1.5W limit
(dotted line) and the corresponding thermal derating curve (solid line) at that input
voltage. It is not recommended to operate at an ambient temperature higher than
125
oC. The thermal derating power is acquired with an evaluation board
similar to the EVM shown in the Layout Example section. T
shut represents the
primary-side over-temperature shutdown rising threshold. As shown in the Electrical
Characteristics table, the typical T
shut value is 160
oC, and
minimal T
shut value is 150
oC. The SOA derating curve with both
T
shut = 160
oC and 150
oC are provided below. The SOA
curves under four common VDD-VEE settings, 15V, 18V, 22V, and 25V are characterized. In
each SOA curve, the input voltage is swept from 9V to 18V. To represent a worst-case
condition with T
shut = 150
oC, the test is done in a shieded box to
block circulating air in the thermal chamber.
Figure 7-1 SOA
Derating Curves: VVDD-VEE = 15 V, VCOM-VEE = 5 V,
Tshut=160oC, No Load on
VCOM-VEE Figure 7-3 SOA
Derating Curves: VVDD-VEE = 22 V, VCOM-VEE = 4 V,
Tshut=160oC, No Load on
VCOM-VEE Figure 7-5 SOA Derating Curves:
VVDD-VEE = 22 V, VCOM-VEE = 4 V,
Tshut=150oC, No Load on VCOM-VEE,
tested in a shielded box. Figure 7-7 Shutdown: VIN = 15 V, VVDD-VEE = 22 V,
VCOM-VEE = 4 V, IVDD-VEE = 68 mA, No Load on
VCOM-VEE. Time Scale: 2ms/div. Figure 7-9 VVDD-VEE Load Regulation: VIN = 13.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-11 VVDD-VEE Load Regulation: VIN = 16.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-13 VCOM-VEE Load Regulation: VIN = 15 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-15 Efficiency vs. Load on VVDD-VEE: VIN = 13.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V, No Load on
VCOM-VEE Figure 7-17 Efficiency vs. Load on VVDD-VEE: VIN = 16.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V, No Load on
VCOM-VEE Figure 7-19 Input
Current vs. Load on VVDD-VEE: VIN = 15 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V, No Load on
VCOM-VEE Figure 7-2 SOA
Derating Curves: VVDD-VEE = 18 V, VCOM-VEE = 3 V,
Tshut=160oC, No Load on
VCOM-VEE Figure 7-4 SOA Derating Curves:
VVDD-VEE = 25 V, VCOM-VEE = 5 V,
Tshut=160oC, No Load on
VCOM-VEE Figure 7-6 Start-up: VIN = 15 V, VVDD-VEE = 22 V,
VCOM-VEE = 4 V, IVDD-VEE = 68 mA, No Load on
VCOM-VEE. Time Scale: 1ms/div. Figure 7-8 Load
Transient Response: Between No Load and 1.5W, VIN = 15 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-10 VVDD-VEE Load Regulation: VIN = 15 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-12 VCOM-VEE Load Regulation: VIN = 13.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-14 VCOM-VEE Load Regulation: VIN = 16.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V Figure 7-16 Efficiency vs. Load on VVDD-VEE: VIN = 15 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V, No Load on
VCOM-VEE Figure 7-18 Input
Current vs. Load on VVDD-VEE: VIN = 13.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V, No Load on
VCOM-VEE Figure 7-20 Input
Current vs. Load on VVDD-VEE: VIN = 16.5 V,
VVDD-VEE = 22 V, VCOM-VEE = 4 V, No Load on
VCOM-VEE