LD497 datasheet, PDF - EEWORLD Datasheet

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LD497: DescriptionLD497 Hall signal triggered car ignition control circuit; CategoryOther integrated circuit (IC); File Size592KB，11 Pages; ManufacturerHUA AO; Websitehttp://www.huaaoe.com/; Dandong Huaao Electronics Co., Ltd. was established in 2001. It specializes in the development, design, production, promotion, application and service of integrated circuits and transistors for automobile/motorcycle electronic appliances. Its products are exported to the international market.

The company's products for automotive/motorcycle electronic accessories include:

● ASIC for automobile and motorcycle flashers
● ASIC for automobile wiper intermittent relay
● ASIC for automobile high-energy electronic ignition
● ASIC for motorcycle igniter
● ASIC for automobile AC generator voltage regulator
● ASIC for long time timer
● Power Darlington transistor
● Power transistor
● Small and medium power transistor
● High frequency low noise transistor
● Power MOS field effect tube
★ New products under development include: ASIC for automobile proximity detector, ASIC for NMOS output control light brightness adjustment, ASIC for Hall sensor, ASIC for bidirectional motor drive, ASIC for headlight fault detector, ASIC for automobile speedometer, ASIC for automobile rear fog lamp controller, etc.

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LD497 Overview

LD497 Hall signal triggered car ignition control circuit

Features

LD497 Ignition ASIC

♦ LD497 is a high performance electronic ignition control circuit, used in contactless automotive electronic ignition system triggered by Hall signal.

♦ The chip drives an external NPN Darlington to control the primary coil current to meet the low power consumption energy storage requirements. The outstanding feature of LD497 is that when the coil current drops to 94% of the normal value, a slow recovery time can be preset to slowly restore the dwell angle to the normal ratio (Td/T). In this way, during low temperature rapid start, there may be only one ignition energy less than 94% of the normal value.

Parameters

♦ Directly drive external Darlington power tube

♦ Control the angle of coil charging current (closed angle)

♦ Presettable coil peak current limit

♦ For currents lower than 94% of the normal value, the dwell angle slow recovery time can be preset

♦ Speed value output

♦ Normal protection

♦ Overpressure protection for external Darlington diode

♦ Built-in power protection voltage regulator

♦ Power reverse connection protection

♦ There are two packages to choose from: SOP16 (surface mount) and DIP16 (direct plug-in). SOP16 is usually the package of choice.

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