MAX14514

Dual Electroluminescent Lamp Driver

Industry's Most Flexible Dual EL Driver for Efficient and Bright Backlighting


Please check latest availability status for a specific part variant.

Description

The MAX14514 is a high-voltage DC-AC converter ideal for driving two electroluminescent (EL) lamps. The MAX14514 features a +2.7V to +5.5V input range that allows the device to accept a wide variety of voltage sources, including single-cell lithium-ion (Li+) batteries. The lamp outputs of the device generate up to 300VP-P for maximum lamp brightness.

The MAX14514 utilizes an inductor-based boost converter to generate the high voltage necessary to drive EL lamps and allows the use of a 220µH inductor to effectively drive total combined lamp sizes of up to 20nF.

The MAX14514 uses a high-voltage full-bridge output stage to convert the high voltage generated by the boost converter to an AC waveform suitable for driving the EL panels. An external resistor controls the slew-rate of the rising and falling edges of the AC drive waveform to reduce audible noise output. The high-voltage outputs are ESD protected up to ±15kV Human Body Model, ±4kV IEC 61000-4-2 Air Gap Discharge, and ±4kV IEC 61000-4-2 Contact Discharge.

The MAX14514 features dimming/enable controls (DIM1, DIM2) for each output to allow the user to set the peak-to-peak output voltage with a PWM signal, a DC analog voltage, or a resistor connected from DIM_ to GND. The MAX14514 also provides a slow turn-on/-off feature that slowly ramps the output voltage applied to the lamp when enabled or disabled.

The MAX14514 enters a low-power shutdown mode when the EN and DIM_ inputs are connected to GND. The device also features thermal shutdown if the die temperature exceeds +158°C (typ).

The MAX14514 is available in a space-saving, 14-pin, 3mm x 3mm TDFN package and is specified over the extended -40°C to +85°C operating temperature range.
MAX14514: Typical Application Circuit MAX14514: Typical Application Circuit Enlarge+

Key Features

  • Dual ±15kV ESD-Protected EL Lamp Outputs
  • 300VP-P Maximum Output for Highest Brightness
  • +2.7V to +5.5V Input Voltage Range
  • Resistor Adjustable Slew-Rate Control
  • Resistor Adjustable Lamp and Switching Converter Frequencies
  • DIM Input for Controlling Output Voltage Through DC Analog Voltage, PWM, or Resistor to GND
  • Capacitor Adjustable Soft Turn-On/Off
  • Low 150nA Shutdown Current
  • Thermal Shutdown
  • Space-Saving, 14-Pin, 3mm x 3mm TDFN Package

Applications/Uses

  • Keypad Backlighting
  • LCD Backlighting
  • PDAs/Smartphones
Part NumberTopologyEL LampsVIN
(V)
VPP
(V)
ESD Protect.
(±kV)
Dimming ControlSoft StartPackage/PinsOper. Temp.
(°C)
max num. ofminnom
MAX14514 Inductor Based22.730015
Analog
PWM
Resistor
Yes
TDFN/14
-40 to +85
See All ElectroLuminescent Drivers (2)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX14514EVKIT: Evaluation Kit for the MAX14514

Quality and Environmental Data

Product Reliability Reports: MAX14514.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX14514ETD+
  • MAX14514ETD+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
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