MIC4833中文资料Inductor Based Dual Lamp EL Driver数据手册Microchip规格书

描述 Description

The MIC4833 is a low noise dual electroluminescent (EL) panel driver used in backlighting applications. The MIC4833 converts a low DC voltage to a high DC voltage using a boost converter and then alternates the high DC voltage across the EL panels using an H-bridge. The MIC4833 incorporates internal wave-shaping circuitry specifically designed to reduce audible noise emitted by EL panels. The two EL panels may be dimmed by applying a PWM signal to the device. The MIC4833 drives two outputs from a single inductor and requires a minimum number of passive components. It features an operating input voltage range of 2.3V to 5.8V, making it suitable for 1-cell Li-Ion and 2- or 3-cell alkaline/NiCad/NiMH battery applications.An external resistor may be used to adjust the output voltage slew rate to reduce audible noise. The MIC4833 features separate oscillators for the boost and H-bridge stages to allow independent control. External resistors set the operating frequencies of each stage allowing the EL circuit to optimize efficiency and brightness.

特性 Features

• Drives two EL panels, up to 4in² each at full brightness
• Independent input control for each of the two panels and allows PWM dimming.
• 220VPP regulated AC output waveform
• 2.3V to 5.8V DC input voltage
• Wave-shaping circuit to reduce audible noise
• Adjustable slew rate for audible noise reduction
• Independently adjustable boost converter and EL panel frequency
• Single inductor to power both panels
• 0.1µA typical shutdown current
• -40°C to +125°C junction temperature range

简介

MIC4833属于集成电路（IC）的照明镇流器控制器。由制造生产的MIC4833照明，镇流器控制器此产品族中的产品可用于实现控制和调节功能。对于日光灯、电致发光灯和 HID 灯等非 LED 照明工具的正常工作，这些功能很有必要或十分有用。既定器件所具备的特定功能集因预期用途各异，并且所供应的产品可能包括相应资源以直接控制驱动负载的电源，也可能不包括这些资源。