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MIC4827

Features: • 1.8V to 5.5V DC input voltage• 180VPP regulated AC output waveform• Independently adjustable EL lamp frequency• Independently adjustable boost converter frequency• 0.1A shutdown currentApplication• LCD panel backlight• Cellular phones• PD...

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SeekIC No. : 004420970 Detail

MIC4827: Features: • 1.8V to 5.5V DC input voltage• 180VPP regulated AC output waveform• Independently adjustable EL lamp frequency• Independently adjustable boost converter frequency...

MIC4827 Data Sheet

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Part Number:
MIC4827
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/26

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Product Details

Description



Features:

• 1.8V to 5.5V DC input voltage
• 180VPP regulated AC output waveform
• Independently adjustable EL lamp frequency
• Independently adjustable boost converter frequency
• 0.1A shutdown current


Application

• LCD panel backlight
• Cellular phones
• PDAs
• Pagers
• Calculators
• Remote controls
• Portable phones


Pinout

Connection Diagram


Specifications

Supply Voltage (VDD) ................................................0.5V to 6V
Output Voltage (VCS) ........................................... 0.5V to 100V
Frequency Control Voltage (VRSW, VREL) ... 0.5V to (VDD +0.3V)
Power Dissipation @ TA = 85°C .......................................200mW
Storage Temperature (TS) ............................... 65°C to +150°C
ESD Rating ........................................................................Note 3


Description

Micrel's MIC4827 is a high output voltage, DC to AC converter,designed for driving EL (Electroluminescent) lamps.The device operates from an input voltage range of 1.8V to 5.5V, making it suitable for 1-cell Li Ion and 2- or 3-cell alkaline/NiCad/NiMH battery applications. The MIC4827 converts a low voltage DC input to a 180VPP AC output signal that drives the EL lamp.

The MIC4827 is comprised of two stages: a boost stage, and an H-bridge, lamp driver, stage. The boost stage steps the input voltage up to +90V. The H-bridge stage then alternately switches the +90V output to each terminal of the EL lamp,thus creating a 180VPP AC signal to drive the EL lamp and generate light.

The MIC4827 features separate oscillators for the boost- and H-bridge stages. External resistors independently set the operating frequency of each stage. This flexibility allows the EL lamp circuit to be optimized for maximum efficiency and brightness.

The MIC4827 uses a single inductor and a minimum number of external components, making it ideal for portable, spacesensitive applications.

The MIC4827 is available in an 8-pin MSOP package with an ambient temperature range of 40°C to +85°C.




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