HV850中文资料High Voltage, Low Noise, Inductorless EL Lamp Driver数据手册Microchip规格书

描述 Description

HV850 is a high voltage electroluminescent (EL) Lamp Driver IC. It is designed to drive EL lamps of up to 1.5in2, with capacitive values up to 5.0nF. The HV850 converts a low voltage DC input to a high voltage AC output across an EL lamp. It uses a charge pump scheme to boost the input voltage, eliminating the need for external inductors, diodes, and high voltage capacitors, components commonly found in conventional topologies.The charge pump circuit discharges its energy into an EL lamp through a high voltage H-bridge. Once the voltage reaches its regulated limit, it is turned off to conserve power. The EL lamp is then discharged to ground and the H-bridge changes state to allow the charge pump to charge the EL lamp in the opposite direction.The EL lamp frequency can be set either by an external resistor, REL, or by applying an external clock, where the clock frequency is divided by 128 to set the EL lamp frequency.

特性 Features

No external components required when using an external EL clock frequency
EL frequency can be set by an external resistor
Low noise
DC to AC converter
Drives up to 5.0nF load (approx. 1.5in2 lamp)
Output voltage regulation
Enable function
EL Lamp dimming

简介

HV850属于集成电路（IC）的照明镇流器控制器。由制造生产的HV850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。