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PDF ISL78022 Data sheet ( Hoja de datos )
| Número de pieza | ISL78022 | |
| Descripción | (ISL78020 / ISL78022) Automotive Grade TFT-LCD DC/DC | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
Data Sheet
ISL78020, ISL78022
December 6, 2007
FN6386.2
Automotive Grade TFT-LCD DC/DC with
Integrated Amplifiers
www.TdahteasIhSeLe7t48u0.2co0mand ISL78022 integrate a high performance
boost regulator with 2 LDO controllers for VON and VOFF, a
VON-slice circuit with adjustable delay and either one
(ISL78020) or five (ISL78022) amplifiers for VCOM and
VGAMMA applications.
The boost converter in the ISL78020 and ISL78022 is a
current mode PWM type integrating an 18V N-Channel
MOSFET. Operating at 1.2MHz, this boost converter 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 a 32 Ld TQFP (7mmx7mm) Pb-free package, the
ISL78020, ISL78022 are specified for operation over a -40°C to
+105°C temperature range.
Ordering Information
PART NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL78020ANZ* ISL78020 ANZ 32 Ld 7x7 TQFP Q32.7x7
ISL78022ANZ* ISL78022 ANZ 32 Ld 7x7 TQFP Q32.7x7
*Add “-T” suffix for tape and reel. Please refer to TB347 for details
on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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 7x7 TQFP package
• Pb-free (RoHS compliant)
Applications
• All automotive TFT-LCD panels
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. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL78020, ISL78022
Electrical Specifications VIN = 3V, VBOOST = VSUP = 12V, VSRC = 20V, limits over -40°C to +105°C temperature range, unless
otherwise specified. (Continued)
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
ILEAKCTL
tDrise
www.datasheet4u.com
tDfall
VSRC
ISRC
CTL Input Leakage Current
CTL to OUT Rising Prop Delay
CTL to OUT Falling Prop Delay
SRC Input Voltage Range
SRC Input Current
CTL = AGND or IN
1kΩ from DRN to 8V, VCTL = 0V to 3V
step, no load on OUT, measured from
VCTL = 1.5V to OUT = 20%
1kΩ from DRN to 8V, VCTL = 3V to 0V
step, no load on OUT, measured from
VCTL = 1.5V to OUT = 80%
Start-up sequence not completed
-1
1 µA
100 ns
100 ns
30 V
150 250 µA
Start-up sequence completed
150 350 µA
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 12 Ω
30 60 Ω
350
1000
1800
Ω
tON
tDEL1
tDEL2
tDEL3
Turn-On Delay
CDEL = 100nF (See Figure 22)
Delay Between VBOOST and VOFF CDEL = 100nF (See Figure 22)
Delay Between VON and VOFF CDEL = 100nF (See Figure 22)
Delay From VON to VON-slice
Enabled
CDEL = 100nF (See Figure 22)
10 ms
10 ms
10 ms
10 ms
5 FN6386.2
December 6, 2007
5 Page 
ISL78020, ISL78022
The current through MOSFET is limited to 3A peak. This
restricts the maximum output current based on Equation 3:
IOMAX
=
⎝⎛ILMT – -Δ--2--I--L-⎠⎞
×
V-----I--N--
VO
(EQ. 3)
www.datasheet4u.com
Where ΔIL is peak to peak inductor ripple current, and is set
by Equation 4:
ΔIL
=
-V----I--N--
L
×
-D---
fS
(EQ. 4)
where fS is the switching frequency.
SLOPE
COMPENSATION
CLOCK
SHUTDOWN
AND START-UP
CONTROL
IFB
IREF
CURRENT
AMPLIFIER
FBB
GM
AMPLIFIER
REFERENCE
GENERATOR
PWM
LOGIC
BUFFER
IFB
VOLTAGE
AMPLIFIER
IREF
LX
COMP
PGND
FIGURE 17. THE BLOCK DIAGRAM OF THE BOOST CONTROLLER
11 FN6386.2
December 6, 2007
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet ISL78022.PDF ] | |
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