ISL78022 Intersil Corporation, ISL78022 Datasheet - Page 9

• Manufacturer Part Number: ISL78022
• Description: (ISL78020 / ISL78022) Automotive Grade TFT-LCD DC/DC
• Manufacturer: Intersil Corporation

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Typical Performance Curves
Applications Information
The ISL78020 and ISL78022 provide 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
V
of the whole part is shown in Figure 16. Table 1 lists the
recommended components.
The ISL78020 and ISL78022 integrate an N-Channel
MOSFET in boost converter to minimize the external
component counts and cost. The V
linear-regulators are independently regulated by using
external resistors. To achieve higher voltage than V
one or multiple stage charge pumps may be used.
OFF
) with multiple protection functions. The block diagram
FIGURE 13. START-UP SEQUENCE
TIME (20ms/DIV)
FIGURE 15. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
9
INPUT VOLTAGE
ON
, V
V
OFF
T
BOOST
V
A
OFF
V
= +25°C, unless otherwise specified. (Continued)
ON
1.8
1.5
1.2
0.9
0.6
0.3
ON
0
0
JEDEC JESD51-7 HIGH EFFECTIVE
THERMAL CONDUCTIVITY TEST BOARD -
TQFP SOLDERED TO PCB PER JESD51-5
1.613W
and
ISL78020, ISL78022
BOOST
25
AMBIENT TEMPERATURE (°C)
,
50
θ
75
JA
TQFP32
= +62°C/W
DESIGNATION
D
100
TABLE 1. RECOMMENDED TYPICAL APPLICATION
C
11
1
, D
, C
FIGURE 14. OP AMP RAIL-TO-RAIL INPUT/OUTPUT
Q
Q
D
L
OUTPUT
12
11
21
1
2
1
125
INPUT
, C
, D
3
21
DIAGRAM COMPONENTS
150
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
TIME (50µs/DIV)
DESCRIPTION
December 6, 2007
FN6386.2