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PDF EL7642 Data sheet ( Hoja de datos )
| Número de pieza | EL7642 | |
| Descripción | (EL7640 - EL7642) FT-LCD DC/DC | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Data Sheet
EL7640, EL7641, EL7642
September 26, 2005
FN7415.1
TFT-LCD DC/DC with Integrated
Amplifiers
The EL7640, EL7641, and EL7642 integrate a high
performance boost regulator with 2 LDO controllers for VON
and VOFF, a VON-slice circuit with adjustable delay and
either one (EL7640), three (EL7641), or five amplifiers
(EL7642) for VCOM and VGAMMA applications.
The boost converter in the EL7640, EL7641, and EL7642 is
a current mode PWM type integrating an 18V N-channel
MOSFET. Operating at 1.2MHz, this boost can operate in
either P-mode for superior transient response, or in PI-mode
for tighter output regulation.
Using external low-cost transistors, the LDO controllers
provide tight regulation for VON, VOFF, as well as providing
start-up sequence control and fault protection.
The amplifiers are ideal for VCOM and VGAMMA
applications, with 150mA peak output current drive, 12MHz
bandwidth, and 12V/µs slew rate. All inputs and outputs are
rail-to-rail.
Available in the 32 Ld thin QFN (5mm x 5mm) Pb-free
packages, the EL7640, EL7641, and EL7642 are specified
forwww.DataSheet4U.com operation over the -40°C to +85°C temperature range.
Ordering Information
PART NUMBER PART TAPE & PACKAGE PKG.
(Note)
MARKING REEL (Pb-Free) DWG. #
EL7640ILTZ
7640ILTZ
- 32 Ld 5x5 MDP0051
Thin QFN
EL7640ILTZ-T7 7640ILTZ
7” 32 Ld 5x5 MDP0051
Thin QFN
EL7640ILTZ-T13 7640ILTZ
13” 32 Ld 5x5 MDP0051
Thin QFN
EL7641ILTZ
7641ILTZ
- 32 Ld 5x5 MDP0051
Thin QFN
EL7641ILTZ-T7 7641ILTZ
7” 32 Ld 5x5 MDP0051
Thin QFN
EL7641ILTZ-T13 7641ILTZ
13” 32 Ld 5x5 MDP0051
Thin QFN
EL7642ILTZ
7642ILTZ
- 32 Ld 5x5 MDP0051
Thin QFN
EL7642ILTZ-T7 7642ILTZ
7” 32 Ld 5x5 MDP0051
Thin QFN
EL7642ILTZ-T13 7642ILTZ
13” 32 Ld 5x5 MDP0051
Thin QFN
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and 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-020.
Features
• Current mode boost regulator
- Fast transient response
- 1% accurate output voltage
- 18V/3A integrated FET
- >90% efficiency
• 2.6V to 5.5V VIN supply
• 2 LDO controllers for VON and VOFF
- 2% output regulation
- VON-slice circuit
• High speed amplifiers
- 150mA short-circuit output current
- 12V/µs slew rate
- 12MHz -3dB bandwidth
- Rail-to-rail inputs and outputs
• Built-in power sequencing
• Internal soft-start
• Multiple overload protection
• Thermal shutdown
• 32 Ld 5x5 thin QFN package
• Pb-Free plus anneal available (RoHS compliant)
Applications
• TFT-LCD panels
• LCD monitors
• Notebooks
• LCD-TVs
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
EL7640, EL7641, EL7642
Electrical Specifications VIN = 3V, VBOOST = VSUP = 12V, VSRC = 20V, Over temperature from -40°C to 85°C.
Unless Otherwise Specified. (Continued)
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP
VON-SLICE CIRCUIT
VLO CTL Input Low Voltage
VHI CTL Input High Voltage
ILEAKCTL
CTL Input Leakage Current
tDrise
CTL to OUT Rising Prop Delay
VIN = 2.6V to 5.5V
VIN = 2.6V to 5.5V
CTL = AGND or IN
0.6VIN
-1
1kΩ from DRN to 8V, VCTL = 0V to 3V step,
no load on OUT, measured from VCTL = 1.5V
to OUT = 20%
100
tDfall
CTL to OUT Falling Prop Delay
1kΩ from DRN to 8V, VCTL = 3V to 0V step,
no load on OUT, measured from VCTL = 1.5V
to OUT = 80%
100
VSRC
ISRC
SRC Input Voltage Range
SRC Input Current
Start-up sequence not completed
150
Start-up sequence completed
150
RONSRC
RONDRN
RONCOM
SEQUENCING
SRC On Resistance
DRN On Resistance
COM to GND On Resistance
Start-up sequence completed
Start-up sequence completed
Start-up sequence not completed
5
30
350 1000
tON Turn On Delay
tDEL1
Delay Between VBOOST and VOFF
tDEL2
Delay Between VON and VOFF
tDEL3
Delay From VON to VON-slice Enabled
CDEL
Delay Capacitor
NOTE:
1. Guaranteed by design.
CDLY = 0.22µF (See Figure 23)
CDLY = 0.22µF (See Figure 23)
CDLY = 0.22µF (See Figure 23)
CDLY = 0.22µF (See Figure 23)
30
10
17
10
50 220
MAX
0.4VIN
1
30
250
250
10
60
1800
UNIT
V
V
µA
ns
ns
V
µA
µA
Ω
Ω
Ω
ms
ms
ms
ms
nF
5 FN7415.1
September 26, 2005
5 Page 
EL7640, EL7641, EL7642
The current through MOSFET is limited to 3A peak. This
restricts the maximum output current based on the following
equation:
IOMAX
=
ILMT – -∆--2--I--L-
× V-----I--N--
VO
Where ∆IL is peak to peak inductor ripple current, and is set
by:
∆IL
=
-V----I--N--
L
×
-D---
fS
where fS is the switching frequency.
SLOPE
COMPENSATION
CLOCK
SHUTDOWN
& STARTUP
CONTROL
IFB
IREF
CURRENT
AMPLIFIER
FBB
GM
AMPLIFIER
REFERENCE
GENERATOR
PWM
LOGIC
BUFFER
IFB
VOLTAGE
AMPLIFIER
IREF
LX
COMP
PGND
FIGURE 18. THE BLOCK DIAGRAM OF THE BOOST CONTROLLER
11 FN7415.1
September 26, 2005
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet EL7642.PDF ] | |
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