Rainbow-electronics MAX17062 Bedienungsanleitung

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General Description
The MAX17062 is a high-performance step-up DC-DC
converter that provides a regulated supply voltage for
active-matrix thin-film transistor (TFT) liquid-crystal dis-
plays (LCDs). The MAX17062 incorporates current-
mode, fixed-frequency, pulse-width modulation (PWM)
circuitry with a built-in n-channel power MOSFET to
achieve high efficiency and fast-transient response.
Users can select 640kHz or 1.2MHz operation using a
logic input pin (FREQ). The high switching frequencies
allow the use of ultra-small inductors and low-ESR
ceramic capacitors. The current-mode architecture pro-
vides fast transient response to pulsed loads. A com-
pensation pin (COMP) gives users flexibility in adjusting
loop dynamics. The 22V internal MOSFET can generate
output voltages up to 20V from an input voltage
between 2.6V and 5.5V. Soft-start slowly ramps the input
current and is programmed with an external capacitor.
The MAX17062 is available in a 10-pin TDFN package.
Applications
Notebook Computer Displays
LCD Monitor Panels
LCD TV Panels
Features
o 90% Efficiency
o Adjustable Output from V
IN
to 20V
o 2.6V to 5.5V Input Supply Range
o Input Supply Undervoltage Lockout
o Pin-Programmable 640kHz/1.2MHz Switching
Frequency
o Programmable Soft-Start
o Improved EMI
o FB Regulation Voltage Tolerance < 1%
o Small 10-Pin TDFN Package
o Thermal-Overload Protection
MAX17062
TFT-LCD Step-Up DC-DC Converter
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-1042; Rev 0; 10/07
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
PKG
CODE
MAX17062ETB+T -40°C to +85°C
10 TDFN-EP*
(3mm x 3mm)
T1033-2
COMP
12345
10 9 8 7 6
FB
PGND
PGND
SHDN
SS
FREQ
LX
LX
IN
MAX17062
TOP VIEW
TDFN
(3mm x 3mm)
*EP = EXPOSED PAD.
*EP
Pin Configuration
LX LX
FB
PGND
PGND
AGND
FREQ
IN
COMP
SS
EP
1
4
5
2
3
9
8
67
10
V
OUT
V
IN
2.6V TO 5.5V
SHDN
MAX17062
Minimal Operating Circuit
+
Denotes a lead-free package.
*
EP = Exposed pad.
T = Tape and reel.
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Inhaltsverzeichnis

Seite 1 - MAX17062

General DescriptionThe MAX17062 is a high-performance step-up DC-DCconverter that provides a regulated supply voltage foractive-matrix thin-film trans

Seite 2

MAX17062Input Capacitor SelectionThe input capacitor (CIN) reduces the current peaksdrawn from the input supply and reduces noise injectioninto the IC

Seite 3

Multiple-Output Power Supply for TFT-LCDFigure 3 shows a power supply for active-matrix TFT-LCD flat-panel displays. Output-voltage transient perfor-m

Seite 4

MAX170623) Place the feedback voltage-divider-resistors asclose to the FB pin as possible. The divider’s centertrace should be kept short. Placing the

Seite 5

MAX17062TFT-LCD Step-Up DC-DC Converter______________________________________________________________________________________ 136, 8, &10L, DFN TH

Seite 6

MAX17062TFT-LCD Step-Up DC-DC ConverterMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim p

Seite 7

MAX17062TFT-LCD Step-Up DC-DC Converter2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATIN

Seite 8

MAX17062TFT-LCD Step-Up DC-DC Converter_______________________________________________________________________________________ 3ELECTRICAL CHARACTERIS

Seite 9

MAX17062TFT-LCD Step-Up DC-DC Converter4 _______________________________________________________________________________________Note 1: Limits are 100

Seite 10

MAX17062TFT-LCD Step-Up DC-DC Converter_______________________________________________________________________________________5SOFT-START(RLOAD = 30Ω)

Seite 11

MAX17062TFT-LCD Step-Up DC-DC Converter6 _______________________________________________________________________________________PIN NAME FUNCTION1 COM

Seite 12

Detailed DescriptionThe MAX17062 is a highly efficient power supply thatemploys a current-mode, fixed-frequency, PWM archi-tecture for fast-transient

Seite 13

MAX17062Soft-StartThe MAX17062 can be programmed for soft-start uponpower-up with an external capacitor. When the shutdownpin is taken high, the soft-

Seite 14

AC characteristics of the inductor core material and theratio of inductor resistance to other power-path resis-tances, the best LIR can shift up or do

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