MP3802 2.5-5.5V 240Vpp High Voltage EL Lamp Driver MSOP-8

MP3802 2.5-5.5V 240Vpp High Voltage EL Lamp Driver MSOP-8

The MP3802 is a high output voltage, DC to AC converter designed for driving Electroluminescent (EL) lamps of up to 5 square inches.

Key Specifications

Features

• 2.5V to 5.5V DC Input Voltage
• 240VPP Regulated AC Output Waveform
• Single Cell Lithium-Ion Compatible
• 10nA Shutdown Current
• Adjustable EL Lamp Frequency
• Adjustable Converter Frequency
• Available in MSOP-8
• Split Supply Capability

Typical Application Circuit

Applications

• Portable Multimedia Players
• LCD Backlighting
• Handheld Wireless Communication
• Mobile Phones
• Remote Controls
• Global Positioning Systems (GPS) "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc.

Design Notes

• Size the inductor for the ripple current at the actual switching frequency, typically 30% of the DC load — not for the DC rating alone.
• The hot loop from input capacitor through the switch to ground sets conducted EMI. Keep that copper area as small as the layout allows.
• Output ripple is set by the capacitor ESR and its DC-bias derating; a 10 µF ceramic often behaves like 4 µF at the rated output voltage.
• Route the feedback divider from the output capacitor terminals, away from the switch node.

Common Questions