EL7581 Datasheet PDF - Intersil Corporation
| Part Number | EL7581 | |
| Description | 3-Channel DC-DC Converter | |
| Manufacturers | Intersil Corporation | |
| Logo |  |
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®
Data Sheet
April 16, 2004
EL7581
FN7100.4
3-Channel DC-DC Converter
The EL7581 is a 3-channel DC-DC
converter IC which is designed
primarily for use in TFT/LCD
applications. It features a PWM boost converter with 2.7V to
14V input capability and 5V to 17V output, which powers the
column drivers and provides up to 720mA @12V, 570mA @
15V from 5V input. A pair of charge pump control circuits
provide regulated outputs of VON and VOFF supplies at 8V
to 40V and -5V to -40V, respectively, each at up to 60mA.
The EL7581 features adjustable switching frequency,
adjustable soft start, and a separate output VON enable
control to allow selection of supply start-up sequence. An
over-temperature feature is provided to allow the IC to be
automatically protected from excessive power dissipation.
The EL7581 is available in a 20-pin HTSSOP package and
is specified for operation over the full -40°C to +85°C
temperature range.
Ordering Information
PART
NUMBER
PACKAGE
TAPE &
REEL PKG. DWG. #
EL7581IRE
20-Pin HTSSOP
-
MDP0048
EL7581IRE-T7
20-Pin HTSSOP
7”
MDP0048
EL7581IRE-T13 20-Pin HTSSOP
13”
MDP0048
EL7581IREZ
(Note)
20-Pin HTSSOP
(Pb-Free)
-
MDP0048
EL7581IREZ-T7 20-Pin HTSSOP
(Note)
(Pb-Free)
7”
MDP0048
EL7581IREZ-T13 20-Pin HTSSOP
(Note)
(Pb-Free)
13”
MDP0048
NOTE: Intersil Pb-Free products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which is compatible with both SnPb and Pb-
free soldering operations. Intersil Pb-Free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J Std-020B.
Features
• TFT/LCD display supply
- Boost regulator
- VON charge pump
- VOFF charge pump
• 2.7V to 14V VIN supply
• 5V < VBOOST < 17V
• 5V < VON < 40V
• -40V < VOFF < 0V
• VBOOST = 12V @ 720mA
• VBOOST = 15V @ 570mA
• High frequency, small inductor DC-DC boost circuit
• Over 90% efficient DC-DC boost converter capability
• Adjustable frequency
• Adjustable soft-start
• Adjustable outputs
• Small parts count
Applications
• TFT-LCD panels
• PDAs
Pinout
EL7581
(20-PIN HTSSOP)
TOP VIEW
VSSB 1
20 ROSC
SS 2
19 ENP
FBB 3
18 ENBN
VDDB 4
17 VREF
LX 5
LX 6
THERMAL
PAD*
16 PGND
15 PGND
LX 7
14 DRVP
DRVN 8
13 VDDP
VDDN 9
12 FBP
FBN 10
11 VSSP
*Refer to PCB layout guideline.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.
|
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EL7581
Typical Performance Curves
95
9V
90
85
12V
15V
80
75
70
65 VIN = 5V
FS = 1MHz
60
0 200 400 600 800
IOUT (mA)
FIGURE 1. EFFICIENCY vs IOUT
1K
95
90 5V
85 9V
80 15V 12V
75
70
65 VIN = 3.3V
FS = 700kHz
60
0 200 400 600 800
IOUT (mA)
FIGURE 2. EFFICIENCY vs IOUT
1K
95
9V
90
12V
85 15V
80
75
70
65 VIN = 5V
FS = 700kHz
60
0 200 400 600 800
IOUT (mA)
FIGURE 3. EFFICIENCY vs IOUT
1K
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
50
VIN = 3.3V
FS = 1MHz
15V
12V
9V
5V
250 450 650 850
IOUT (mA)
FIGURE 5. LOAD REGULATION
1050
95
90
5V
85
9V
80 15V 12V
75
70
65 VIN = 3.3V
FS = 1MHz
60
0 200 400 600 800
IOUT (mA)
FIGURE 4. EFFICIENCY vs IOUT
1K
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
50
VIN = 5V
FS = 1MHz
9V
15V 12V
250 450 650 850
IOUT (mA)
FIGURE 6. LOAD REGULATION
1050
5
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| Information | Total 17 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ EL7581.PDF Datasheet ] | |
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