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MAX8728EVKIT
MAX8728 Evaluation Kit


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 528kB)
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Description
The MAX8728 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that provides the voltages and features required for active-matrix thin-film transistor (TFT), liquid-crystal display (LCD) panels in LCD monitors and LCD TVs. The EV kit contains a stepdown switching regulator, a step-up switching regulator, a positive two-stage charge pump for the TFT gate-on supply, and a negative single-stage charge pump for the TFT gate-off supply. Also included is a logic-controlled, high-voltage switch with adjustable delay, and a capacitive dummy load at the gate-on supply for ease of testing.

The EV kit, as configured, provides the following outputs from a +10VDC to +13.2VDC power supply. The step-down switching regulator is configured for a +3.3V output, providing at least 2A. The step-up switching regulator is configured for a +13.5V output, providing at least 500mA. The positive charge pump is configured for a +28V output, providing at least 50mA. The negative charge pump is configured for a -6V output, providing at least 150mA. The high-voltage switch can be controlled by external logic and can be configured for a delay set by an external capacitor.

The MAX8728 switches at 1.5MHz, allowing the use of tiny surface-mount components. The EV kit can also operate at a lower frequency with component changes. The MAX8728 TQFN package (0.8mm maximum height) with low-profile external components allows this circuit to be less than 2mm high.

Key Features
  • Configured for +10V to +13.2V Input Range
  • Output Voltages
    • +3.3V Output at 2A (Step-Down Switching Regulator)
    • +13.5V Output at 500mA (Step-Up Switching Regulator)
    • +28V Output at 50mA (Positive Charge Pump)
    • -6V Output at 150mA (Negative Charge Pump)
  • Resistor-Adjustable Switching Regulator and Charge-Pump Output Voltages
  • Logic-Controlled, High-Voltage Switch with Adjustable Delay
  • Selectable 500kHz/1MHz/1.5MHz Switching Frequency
  • 180° Out-of-Phase Switching
  • Low-Profile, Surface-Mount Components
  • Fully Assembled and Tested

Reliability Reports
none

Software/Models
none

Ordering Information
Notes:

  1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
  2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
  3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
  4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


Devices: 1-1 of 1

MAX8728EVKIT Free
Sample
Buy Status
Package: TYPE PINS FOOTPRINT
  DRAWING CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX8728EVKIT    
Active

Land Pattern: Not Available

See data sheet

Related Products
MAX8728 Low-Cost Multiple-Output Power Supply for LCD Monitors/TVs

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    Document Ref.: 19-3833; Rev 0; 2005-09-01
    This page last modified: 2006-07-27


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