Rainbow-electronics MAX17075 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Acessórios para ar Rainbow-electronics MAX17075. Rainbow Electronics MAX17075 User Manual Manual do Utilizador

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General Description
The MAX17075 includes a high-voltage boost regulator,
one high-current operational amplifier, two regulated
charge pumps, and one MLG block for gate-driver
supply modulation.
The step-up DC-DC converter is a 1.2MHz current-
mode boost regulator with a built-in power MOSFET. It
provides fast load-transient response to pulsed loads
while producing efficiencies over 85%. The built-in
160mΩ (typ) power MOSFET allows output voltages as
high as 18V boosted from inputs ranging from 2.5V to
5.5V. A built-in 7-bit digital soft-start function controls
startup inrush currents.
The gate-on and gate-off charge pumps provide regu-
lated TFT gate-on and gate-off supplies. Both output
voltages can be adjusted with external resistive
voltage-dividers.
The operational amplifier, typically used to drive the
LCD backplane (VCOM), features high-output short-cir-
cuit current (±500mA), fast slew-rate (45V/µs), wide
bandwidth (20MHz), and rail-to-rail outputs.
The MAX17075 is available in a 24-pin thin QFN pack-
age with 0.5mm lead spacing. The package is a square
(4mm x 4mm) with a maximum thickness of 0.8mm for
ultra-thin LCD design. It operates over the -40°C to
+85°C temperature range.
Applications
Notebook Computer Displays
LCD Monitor Panels
LCD TVs
Features
o 2.5V to 5.5V Input Operating Range
o Current Mode Step-Up Regulator
Fast-Transient Response
Built-In 20V, 3A, 0.16Ω n-Channel Power MOSFET
Cycle-by-Cycle Current Limit
87% Efficiency (5V Input to 13V Output)
1.2MHz Switching Frequency
±1% Output Voltage Regulation Accuracy
o High-Current 18V VCOM Buffer
±500mA Output Short-Circuit Current
45V/µs Slew Rate
20MHz -3dB Bandwidth
Rail-to-Rail Output
o Regulated Charge Pump for TFT Gate-On Supply
o Regulated Charge Pump for TFT Gate-Off Supply
o Logic-Controlled High-Voltage Switches with
Adjustable Delay
o Soft-Start and Timed Delay Fault Latch for All
Outputs
o Overload and Thermal Protection
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
MAX17075
AGND
VCC
BGND
DRVN
REF
FBN
POS
NEG
OUT
LX
PGND
RSTIN
FB
COMP
DRN
RST
COM
SRC
DRVP
FBP
SUP
CTL EP
DEL
R1
10Ω
C5
1μF
V
AVDD
TO V
COM
BGND
V
IN
2.5V TO 5.5V
V
GON
V
GOFF
FROM
SYSTEM
3.3V
V
IN
V
MAIN
FROM
TCON
Simplified Operating Circuit
19-4353; Rev 0; 11/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX17075ETG+ -40°C to +85°C 24 TQFN-EP*
*
EP = Exposed paddle.
+
Denotes a lead-free/RoHS-compliant package.
Pin Configuration appears at end of data sheet.
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Resumo do Conteúdo

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General DescriptionThe MAX17075 includes a high-voltage boost regulator,one high-current operational amplifier, two regulatedcharge pumps, and one MLG

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp10 _______________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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Detailed DescriptionThe MAX17075 contains a step-up switching regulatorto generate the source driver supply, and two charge-pump regulators to generat

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Main Step-Up RegulatorThe main step-up regulator employs a current-mode,fixed-frequency PWM architecture to maximize loopbandwidth and provide fast-tr

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp14 _______________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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MAX17075Thermal-Overload ProtectionThermal-overload protection prevents excessive powerdissipation from overheating the MAX17075. When thejunction tem

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The inductor’s saturation current rating and theMAX17075’s LX current limit should exceed IAVDD_PEAK,and the inductor’s DC current rating should excee

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp2 ________________________________________________________

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MAX17075To further optimize transient response, vary RCOMPin20% steps and CCOMPin 50% steps while observingtransient-response waveforms.Charge-Pump Re

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PCB Layout and GroundingCareful PCB layout is important for proper operation.Use the following guidelines for good PCB layout:• Minimize the area of h

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op AmpMaxim cannot assume responsibility for use of any circuitr

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp8 ________________________________________________________

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MAX17075Boost Regulator with Integrated Charge Pumps,Switch Control, and High-Current Op Amp__________________________________________________________

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