MIC4826YMM Microchip

MIC4826 Low Input Voltage, 160 V Output Voltage, EL Driver PP Features General Description 1.8V to 5.5V DC Input Voltage The MIC4826 is a high output voltage, DC to AC converter, designed for driving EL (Electroluminescent) 160 V Regulated AC Output Waveform PP lamps. The device operates from an input voltage Independently Adjustable EL Lamp Frequency range of 1.8V to 5.5V, making it suitable for 1-cell Li Ion Independently Adjustable Boost Converter and 2- or 3-cell alkaline/NiCad/NiMH battery Frequency applications. The MIC4826 converts a low voltage DC 0.1 A Shutdown Current input to a 160 V AC output signal that drives the EL PP lamp. Applications The MIC4826 is comprised of two stages: a boost LCD Panel Backlight stage, and an H-bridge, lamp driver, stage. The boost Cellular Phones stage steps the input voltage up to +80V. The H-bridge PDAs stage then alternately switches the +80V output to each Pagers terminal of the EL lamp, thus creating a 160 V AC PP Calculators signal to drive the EL lamp and generate light. Remote Controls The MIC4826 features separate oscillators for the Portable Phones 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 MIC4826 uses a single inductor and a minimum number of external components, making it ideal for portable, space sensitive applications. The MIC4826 is available in an 8-pin MSOP package with an ambient temperature range of 40C to +85C. Package Type MIC4826 8-Pin MSOP (MM) VDD 1 8VA RSW 2 7 VB REL 3 6 CS GND 4 5 SW 2018 - 2019 Microchip Technology Inc. DS20006134A-page 1MIC4826 Typical Application Circuit L1 D1 V 220P H BAV19WS IN C OUT 0.01P F/100V C IN MIC4826 10P F 15 VDD SW 442k 2 6 RSW CS 2M 3 8 REL VA 4 7 GND VB 2 2in EL LAMP Functional Block Diagram L1 V 220mH D1 IN V 1 DD 5 C R IN SW C OUT SW 2 Switch 6 Oscillator RWS CS Q 1 8 R EL VA Q 2 EL EL LAMP Oscillator V REF Q 3 7 VB 3 Q 4 REL 4 GND DS20006134A-page 2 2018 - 2019 Microchip Technology Inc.