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GSMicro Primary Agent Automotive Linear LED Constant Current Driver IC LAN1032AT

Model：: LAN1032AT

Brand：: GSMicro

Batch No：: 無(wú)EMI干擾600mA SOT89小體積線性車(chē)燈驅(qū)動(dòng)方案LAN1032AT

Desc：: Low-Cost Linear Automotive Headlight Solution

Stock：: 24000 只

PDF：: 下載數(shù)據(jù)手冊(cè) Download PDF

Enquiry Quantity：

Topological :	48V中壓線性大電流LED驅(qū)動(dòng)，線性LED車(chē)燈驅(qū)動(dòng)
Package :	ESOP8封裝，
Max. power output :	1W*3
LED serial number :	3顆
Input voltage :	9~48V寬電壓輸入線性恒流芯片，
Output voltage :	9~12V,
Max. Output Current :	最大輸出電流500mA,
Efficiency :	98%
Dimming mode :	無(wú)調(diào)光
Current accuracy :	輸出電流精度:優(yōu)于±4%，
Typical applications :	汽車(chē)小燈、汽車(chē)示寬燈、汽車(chē)尾燈、摩托車(chē) 燈，低壓燈帶、燈條、洗墻燈，低壓LED燈，其他DC類(lèi)LED燈
Replacement models :	LAN1032AT，LAN1032E，LAN1161ED,LAN1163E,LAN1165ED,LAN1165E,LAN1166ED,LAN1166E,LAN1168ED,LAN1053A,LAN1058A
Application description :	內(nèi)置智能溫控,保護(hù)燈珠不死燈
Keywords :	LAN1032AT,48V線性恒流芯片,LED車(chē)燈驅(qū)動(dòng),汽車(chē)燈恒流芯片,寬壓恒流IC,ESOP8封裝,過(guò)溫保護(hù),防反接,低壓差線性驅(qū)動(dòng),廣晟微半導(dǎo)體
Absolute Maximum Power :	3W,
Storage temperature :	-40~150℃,
Over-temperature protection point :	過(guò)溫保護(hù)點(diǎn)135℃,
Product Keywords :	LAN1032AT,48V線性恒流芯片,LED車(chē)燈驅(qū)動(dòng)芯片,汽車(chē)燈恒流IC,寬壓恒流IC,SOT89-5L封裝
Special Notes :	LAN1032AT 支持9V~48V 寬電壓小電流使用，是替代恒流二極管的理想選擇
Compatible Part Number :	Hi1243,Hi1244,OC7146,ET7135,QX7135,AMC7135，AL8861
Typical Application :	汽車(chē)小燈、汽車(chē)示寬燈、汽車(chē)尾燈、摩托車(chē) 燈，低壓燈帶、燈條、洗墻燈，低壓LED燈，其他DC類(lèi)LED燈。
CC Accuracy :	3%
Drive Power :	12V汽車(chē)燈驅(qū)動(dòng)9V@600mA車(chē)燈,
Max Efficiency :	98%
Max Output Voltage :	最低壓差1V,
Input Voltage :	7-48V
Series LED count :	12V汽車(chē)燈驅(qū)動(dòng)9V@600mA,線性LED車(chē)燈方案
Package Type :	SOT89-5L 封裝，SOT89-5L 貼片封裝，SOT89-5L 小體積封裝，SOT89-5L 車(chē)燈驅(qū)動(dòng) IC 封裝，SOT89-5L 貼片三極管封裝，LAN1032AT SOT89-5L 封裝
Circuit Topology :	支持高壓差的中壓恒流芯片，汽車(chē)燈專(zhuān)用線性方案

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LAN1032AT 48V Linear LED Constant Current Driver IC | Automotive LED Lighting | Wide Voltage IC | GSMicro

Keywords: LAN1032AT, 48V linear constant current IC, LED automotive lighting driver, car LED constant current driver, wide voltage constant current IC, SOT89-5L package, GSMicro

Overview:LAN1032AT is a 48V medium-voltage linear constant current IC designed by GSMicro for 9V/18V LED beads. With only one external resistor, it integrates MOS, over-temperature protection, high-voltage current reduction, and reverse polarity protection. LAN1032AT supports 7V–48V wide voltage input with flicker-free operation and 1V low dropout, widely used in automotive lighting, low-voltage LED strips, and DC LED lights. It is an ideal high-reliability, low-cost replacement for constant current diodes.

LAN1032AT Product Description

LAN1032AT is a high-voltage dropout linear constant current IC engineered for 9V and 18V LEDs. A complete constant current driver circuit can be built with only one external resistor, featuring minimal peripherals, lower cost, and faster design.

LAN1032AT features built-in 140℃ over-temperature protection (OTP). The output current is automatically reduced when the temperature reaches the threshold, ensuring no flicker at high temperatures, effectively controlling LED temperature and extending service life.

LAN1032AT integrates a 48V power MOSFET with a maximum output current of 600mA and only 1V dropout at 600mA, delivering higher efficiency and lower heat generation.

LAN1032AT supports ultra-wide 7V–48V input voltage, compatible with 12V/24V vehicles. It maintains flicker-free performance under voltage fluctuations, activates automatic current reduction at high voltages, and features built-in reverse polarity protection to enhance reliability in automotive and industrial applications.

LAN1032AT Key Features

LAN1032AT Ultra-minimal peripheral circuit: single resistor for current adjustment, reducing BOM cost and production complexity

LAN1032AT Built-in 48V power MOSFET, 600mA max output current, 1V ultra-low dropout

LAN1032AT 140℃ over-temperature protection, automatic current reduction at high temperatures for LED safety

LAN1032AT 10V–48V wide voltage input, high-voltage current limiting, full-range flicker-free operation

LAN1032AT Integrated reverse polarity protection, no external components required

LAN1032AT SOT89-5L high thermal dissipation package, ideal for automotive lighting and low-voltage LED strips

LAN1032AT Applications

Automotive Lighting: car position lights, tail lights, motorcycle lights – fully supported by LAN1032AT

Low-Voltage Lighting: LED strips, wall washers, low-voltage LED luminaires – driven by LAN1032AT

General DC LED lights, industrial lighting, decorative lighting, compact constant current modules – LAN1032AT is the optimal solution

LAN1032AT Internal Block Diagram

LAN1032AT 48V Linear Constant Current IC | Automotive LED Driver Internal Block Diagram

LAN1032AT Typical Application Circuit

LAN1032AT 48V LED Constant Current Driver Schematic | Automotive LED Lighting Solution

LAN1032AT Pin Configuration

Pin No.	Symbol	Description
1	NC	LAN1032AT No Connection, reserved pin, floating
2	GND	LAN1032AT Ground and thermal pad
3	CS	LAN1032AT Current sense pin
4	DR	LAN1032AT LED constant current output, connect to LED cathode
5	VIN	LAN1032AT Power supply input

LAN1032AT Package Dimensional Drawing

LAN1032AT SOT89-5L Package Dimensions | 48V Constant Current IC Package

LAN1032AT Electrical Specifications (VIN=13V, T=25℃)

Symbol	Parameter	Typical Value	Unit
OP_VDD	LAN1032AT Operating Voltage	7–48	V
IOUT	LAN1032AT Max Output Current	600	mA
VREF_CS	LAN1032AT Reference Voltage	300	mV
RDS_ON	LAN1032AT Low Dropout Voltage	1	V
T_OTP	LAN1032AT Over-Temperature Threshold	140	℃
ESD	LAN1032AT ESD Protection	2000	V

LAN1032AT Maximum Power Specifications

Input Voltage	Output Voltage	LAN1032AT Max Output Current
12–14V	9V	600mA
12–20V	9V	300mA
24V	18V	400mA
10–48V	9V	60mA
12–14V	12V	Not recommended for strict low-dropout applications

LAN1032AT Application Notes (Datasheet Ver1.1)

Power Supply & Startup

The LAN1032AT is powered through the VIN pin. The device starts operating when input voltage exceeds 7V. Optimal MOS drive voltage is achieved at VIN ≥ 11V.

LAN1032AT supports 10V~48V wide-voltage low-current operation, making it an ideal replacement for constant current diodes.

Output Current

LAN1032AT Output Current Formula: Io=0.3V÷Rcs. Precise output current is set by adjusting the external resistor at the CS pin.

Over-Voltage Protection

When input voltage is significantly higher than output voltage, the over-voltage protection circuit activates and reduces output current continuously to prevent damage to the LAN1032AT, ensuring flicker-free operation from 10V to 48V.

Reverse Polarity Protection

LAN1032AT integrates a reverse polarity diode at the input to protect internal ESD devices from damage due to reversed power connection, improving system reliability.

Over-Temperature Current Regulation

LAN1032AT features 140℃ built-in OTP. High power dissipation occurs with 9-10V LEDs and 13.5V high-dropout input. When junction temperature reaches 140℃ (PCB temperature ~90℃), LED temperature is controlled below 125℃.

LAN1032AT rapidly reduces current under excessive heat for self-protection, suitable for fanless compact light applications.

PCB Design Guidelines

The thermal pad of LAN1032AT SOT89-5L package must be soldered tightly to aluminum/copper PCB; poor soldering may cause permanent damage.

Optimize thermal design by adjusting the distance between LAN1032AT and LEDs to maintain safe LED temperatures.

Widen high-current traces (especially SOURCE, input, and output paths) to improve heat dissipation and current capability of LAN1032AT.

LAN1032AT Ordering Information

Part Number	Package	Marking	Packing
LAN1032AT	SOT89-5L	32AT	Tape & Reel 4000/Reel

LAN1032AT is packed in moisture-proof aluminum foil bags. Keep sealed and dry after opening; baking is recommended before use.

GSMicro Linear Automotive LED Driver IC Comparison

Part No.	Package	Voltage	OTP	LED	Max Current
LAN1032AT	SOT89-5L	48V	140℃	9V	0.6A@Vin=13V Vout=9V
LAN1032E	ESOP8	48V	140℃	9V	0.8A@Vin=13V Vout=9V
LAN1161ED	ESOP8	100V	120℃	12V	1.2A@Vin=13.5V Vout=12V
LAN1163E	ESOP8	100V	135℃	12V	1.2A@Vin=13.5V Vout=12V
LAN1165ED	ESOP8	100V	120℃	12V	2A@Vin=13.5V Vout=12V
LAN1165E	ESOP8	100V	135℃	12V	2A@Vin=13.5V Vout=12V
LAN1166ED	ESOP8	100V	120℃	12V	4A@Vin=13.5V Vout=12V
LAN1166E	ESOP8	100V	135℃	12V	4A@Vin=13.5V Vout=12V
LAN1168ED	ESOP8	200V	120℃	24V	1.2A@Vin=27V Vout=24V
LAN1053A	ESOP8	100V	135℃	9V	1.2A@Vin=13.5V Vout=9V
LAN1058A	ESOP8	200V	135℃	24V	1.2A@Vin=27V Vout=24V

LAN1032AT vs Competitors (SL7108/OC7201C)

Item	LAN1032AT (GSMicro)	SL7108 (Competitor)	OC7201C (Competitor)
Input Voltage Range	7V–48V (Ultra Wide)	2.5V–40V	4.5V–40V
Voltage Rating	48V	40V	40V
Over-Temperature Protection	135℃, Higher Stability	125℃	125℃
Reverse Polarity Protection	? Integrated, No External Parts	? None, External Diode Required	? None, External Diode Required
Over-Voltage Current Reduction	? Auto current foldback up to 48V, Flicker-Free	? None, Risk of burnout	? None, Risk of burnout
Dropout Voltage	1V@600mA, High Efficiency	1.2V@1A	[email protected]
Package	SOT89-5L (Small Size, Low Cost)	ESOP8 (Large Size)	DFN (High Cost)
Automotive Compatibility	12V/24V Vehicles, Universal Fit	For stable low-voltage use only	High-current, high-cost applications

? Key Advantages of LAN1032AT: Compared with SL7108 and OC7201C, only LAN1032AT supports 48V wide voltage, built-in reverse polarity protection, 135℃ OTP, and high-voltage current foldback. It is ideal for fluctuating automotive voltage environments with minimal peripherals, lower cost, and higher reliability.

LAN1032AT Replacement & Competitive Edge

LAN1032AT can directly replace standard constant current diodes, conventional linear constant current ICs, and low-voltage LED driver chips.

1. LAN1032AT 48V high voltage rating, 600mA max output – stronger current & wider voltage

2. LAN1032AT Built-in OTP + over-voltage protection – safer for automotive, no burnout

3. LAN1032AT Single-resistor design, minimal BOM – lower cost & faster production

4. LAN1032AT Integrated reverse polarity protection, 1V low dropout – higher efficiency & lower heat

5. LAN1032AT SOT89-5L compact high-thermal package – ideal for automotive & industrial use

Recommended Models

GSMicro Full-Series Automotive LED Driver ICs: LAN1032AT, LAN1032E, LAN1161ED, LAN1163E, LAN1165ED, LAN1165E, LAN1166ED, LAN1166E, LAN1168ED, LAN1053A, LAN1058A. Covering 48V/100V/200V ratings for automotive headlights, tail lights, and truck lighting.

About GSMicro

GSMicro Semiconductor (Shenzhen) Co., Ltd. (GSMicro), founded in 2023, evolved from Lumenchip established in 2010. Headquartered in Shenzhen, China, GSMicro is a leading analog IC provider focused on mixed-signal chip design, product commercialization, and green intelligent technology.

GSMicro integrates global best practices and channels, breaking traditional distribution models. We operate a dual business model: hybrid authorized distribution, market analysis, technical solution support, and one-stop supply chain services. Our agency lines and proprietary brands complement each other to deliver superior customer value.

GSMicro offers complete solutions and product portfolios including MCU, power management ICs, signal chain chips, and power discrete devices. Our products serve signal processing, power management, automotive electronics, and LED lighting. Authorized partners include DONGWOON, PowTech, CRHJ, APM, COOLSEMI, ANHI, Reasunos, OCX, MassChip, XLSEMI, NSIWAY, EGmicro, REMON, ChipWays, AISPEECH, Aerosemi, etc.

Adhering to the core values "Employee-centric, Customer-first, Value-driven", GSMicro leads in semiconductor distribution and application solutions worldwide.

Official Website: http://huimai2.com

For sales or samples, please contact: +86 18018703531 or WeChat: gsmicro_semi (Remark: LAN1032AT).