LAN1166ED 100V Low Dropout High Current Linear Constant Current IC | Original Qinglan Semiconductor | Dedicated Driver IC for Automotive Lights

Keywords: LAN1166ED, 100V linear constant current IC, 4A automotive LED driver IC, 12V automotive headlight IC, low dropout LED driver, over-temperature protection, ESOP8 package, Qinglan Semiconductor, Gsmicro Authorized Distributor

Overview: LAN1166ED is a 100V high voltage, 4A high current linear constant current IC launched by Qinglan Semiconductor, specially designed for 12V LED beads. It integrates 120°C over-temperature protection, 0.57V low dropout voltage, 100V/25A power MOSFET and high voltage current foldback protection. Packaged in high heat dissipation ESOP8, it features minimal peripheral components. Ideal for automotive headlights, tail lights, motorcycle lights and DC high-power LED lighting, it is the preferred driver solution for high-power on-board lighting. Gsmicro is the official authorized first-class distributor of Qinglan Semiconductor.

Product Description

LAN1166ED is an automotive dedicated linear constant current IC featuring low dropout voltage and high current output for 12V LED beads. Only two external resistors are required to build a complete constant current drive circuit, featuring simple peripheral design, low cost and easy mass production.

Built-in 120°C over-temperature protection circuit ensures stable operation under high voltage and high differential pressure conditions. It keeps the temperature of LED beads below 130°C under various heat dissipation environments, perfectly adapting to harsh high-temperature working conditions of automotive systems.

Integrated 25A/100V power MOSFET supports maximum continuous output current up to 4A. Adopting low dropout drive circuit, the dropout voltage is only 0.57V at 4A output, which generates less heat and achieves higher efficiency, making it suitable for 12V high-power automotive lights.

Equipped with built-in high voltage protection circuit. The IC will automatically reduce output current when input voltage reaches 15V to prevent damage caused by high voltage surge and improve adaptability to fluctuating automotive power supply.

Key Features

● 100V high voltage withstand, max 4A continuous output current, suitable for 12V high-power automotive headlights and engineering vehicle lights.

● Ultra low dropout voltage of 0.57V @ 4A, lower heat generation and power consumption, improving lamp efficiency and stability.

● Built-in 120°C over-temperature protection, automatically reducing current at high temperature to protect IC and LED beads against burnout.

● High voltage current foldback protection activated at 15V, adapts to automotive power fluctuation and avoids damage from overvoltage.

● Only two external resistors required, capacitor-free design, ultra-simple circuit, low BOM cost and easy mass production.

● ESOP8 package with excellent heat dissipation performance and large exposed thermal pad on bottom, meeting high heat dissipation requirements for high-power applications.

Electrical Characteristics

Pin Definition

Package Dimension Drawing

Typical Application Circuit

Applications

● Automotive headlights, position lights, marker lights, tail lights, motorcycle lights, engineering vehicle lights, 12V high-power LED lamps, DC high-power LED lighting, on-board lighting systems.

Application Notes

● Constant Current Setting: Output current Io = 0.3V ÷ Rcs. Rcs = 75mΩ for 4A output.

● High Voltage Protection: Ground the SEL pin. The IC will reduce output current automatically when input voltage ≥ 15V for chip protection.

● Heat Dissipation: Use 2W thermal conductive copper substrate for high-power operation, keep the exposed thermal pad closely attached to heat dissipation layer.

● Reverse Polarity Protection: Connect a 1K resistor in series at VIN terminal to prevent chip damage from reverse power connection.

Drop-in Replacement

● Directly replace linear constant current ICs such as SM2082, HX319A, QX7136, SL7108 and OC7201C.

● Advantages: 100V high voltage rating, 4A high current, 0.57V ultra low dropout, built-in OVP & over-temperature protection, minimal peripheral components and lower cost.

Ordering Information

Gsmicro Linear Automotive LED Driver IC Comparison

FAQ – LAN1166ED Automotive LED Driver IC

Brand Agency & Service

Gsmicro Semiconductor (Shenzhen) Co., Ltd. is an authorized first-class distributor of Qinglan Semiconductor. We focus on sales and technical solution service for automotive LED driver ICs. We supply full series of LAN1166ED linear constant current ICs with in-stock goods, samples and comprehensive technical support, widely used in automotive headlights, motorcycle lights, engineering vehicle lights and other high-power LED lighting fields. We have warehouses in Shenzhen and Shanghai, supporting fast delivery across China and overseas markets.