ISL97642 Intersil Corporation, ISL97642 Datasheet - Page 9

• Manufacturer Part Number: ISL97642
• Description: TFT-LCD DC/DC
• Manufacturer: Intersil Corporation

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Typical Performance Curves
Applications Information
The ISL97642 provides a highly integrated multiple output
power solution for TFT-LCD applications. The system
consists of one high efficiency boost converter and two low
cost linear-regulator controllers (V
multiple protection functions. The block diagram of the whole
part is shown in Figure 16. Table 1 lists the recommended
components.
The ISL97642 integrates an N-Channel MOSFET in boost
converter to minimize the external component counts and
cost. The V
regulated by using external resistors. To achieve higher
voltage than V
may be used.
FIGURE 13. OP AMP RAIL-TO-RAIL INPUT/OUTPUT
3.0
2.5
2.0
1.5
1.0
0.5
ON
0
0
JEDEC JESD51-7 HIGH EFFECTIVE
THERMAL CONDUCTIVITY TEST BOARD -
QFN EXPOSED DIEPAD SOLDERED TO
PCB PER JESD51-5
BOOST
, V
2.857W
OFF
25
AMBIENT TEMPERATURE (°C)
, one or multiple stage charge pumps
linear-regulators are independently
50
FIGURE 15. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
θ
9
JA
75
QFN32
= 35°C/W
85
ON
100
and V
OUTPUT
INPUT
(Continued)
125
OFF
) with
150
TIME (50µs/DIV)
ISL97642
DESIGNATION
D
FIGURE 14. PACKAGE POWER DISSIPATION vs AMBIENT
C
11
1
, D
, C
Q
Q
D
L
12
11
21
1
2
1
, C
, D
TABLE 1. RECOMMENDED COMPONENTS
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
3
21
0
TEMPERATURE
0
JEDEC JESD51-3 AND SEMI G42-88
(SINGLE LAYER) TEST BOARD
758mW
10µF, 16V X5R ceramic capacitor (1210)
TDK C3216X5R0J106K
1A 20V low leakage Schottky rectifier
(CASE 457-04)
ON SEMI MBRM120ET3
200mA, 30V Schottky barrier diode (SOT-23)
Fairchild BAT54S
6.8µH, 1.3A Inductor
TDK SLF6025T-6R8M1R3-PF
200mA, 40V PNP amplifier (SOT-23)
Fairchild MMBT3906
200mA, 40V NPN amplifier (SOT-23)
Fairchild MMBT3904
25
AMBIENT TEMPERATURE (°C)
50
θ
JA
DESCRIPTION
QFN32
= 125°C/W
75
85
100
125
150
June 18, 2007
FN6436.0