GSMicro Primary Agent Automotive Linear LED Constant Current Driver IC LAN1032E
- Model：
- LAN1032E
- Brand：
- GSMicro
- Batch No：
- LAN1032E
- Desc：
- 800mA Automotive Grade Linear LED Constant Current Driver IC-LAN1032E
- Stock：
- 32000 只
LAN1032E 48V Medium-Voltage Linear Constant Current IC | LED Automotive Lighting Driver IC | Replacement for Current Regulator Diode | 400mA-800mA Wide Input CC Driver
Keywords: LAN1032E, LAN1032E linear constant current IC, 48V automotive lighting driver IC, LED headlight constant current driver, wide voltage linear CC IC, ESOP8 package current regulator IC, over-temperature protection automotive IC, reverse polarity protection CC driver, low dropout linear driver, replacement for current regulator diode, GS Micro LAN1032E
LAN1032E Product Introduction
The LAN1032E is a 48V medium-voltage linear constant current IC tailored for 9V LED chips. It supports high differential voltage operation mode. A complete constant current drive circuit can be built with only one external resistor, featuring minimal peripheral components, simple design and low cost, making it a cost-effective choice for automotive lighting drive applications.
Built-in 140°C over-temperature protection circuit automatically reduces output current when the chip temperature reaches the threshold, ensuring flicker-free operation under high temperature and effectively extending the service life of LED chips.
Equipped with an integrated 48V power MOSFET, the device provides a maximum operating current up to 800mA. At full load of 800mA, the typical dropout voltage is only 1.2V, which results in lower power dissipation and higher efficiency, fully meeting the drive requirements of high-power automotive lamps.
Integrated high-voltage protection circuit reduces output current intelligently when input voltage rises, protecting the IC and LED chips from overvoltage damage. The LED remains lit steadily from 10V to 40V, enabling perfect replacement of conventional current regulator diodes.
LAN1032E Key Advantages
Extremely simple peripheral circuit. The output current is set by a single external resistor, which greatly cuts down BOM cost, lowers production difficulty and improves mass production efficiency.
Integrated 48V power MOSFET with maximum output current of 800mA, stably covering the mainstream constant current range from 400mA to 800mA.
140°C over-temperature protection is integrated. The IC automatically folds back current at high temperature without LED flickering, ensuring the safety and long lifespan of LED chips.
Supports ultra-wide input voltage of 9V~40V with built-in high-voltage current foldback protection. The LED keeps working normally throughout the full voltage range, adapting to fluctuating voltage in automotive power systems.
Embedded reverse polarity protection diode eliminates the need for additional protection components, significantly improving reliability for automotive and industrial applications.
Adopts ESOP8 package with excellent thermal dissipation performance, suitable for high-reliability scenarios such as automotive lighting, low-voltage LED strips and fanless luminaires.
Excellent alternative to traditional current regulator diodes, featuring higher current accuracy, comprehensive protection functions and stronger environmental adaptability.
LAN1032E Application Fields
Automotive Lighting: Automotive position lights, side marker lights, tail lights and motorcycle lights.
Low-Voltage Lighting: Low-voltage LED strips, wall washer lights and other low-voltage LED luminaires.
General DC LED lamps, industrial lighting, decorative lighting and compact constant current drive modules.
LAN1032E Internal Block Diagram
LAN1032E Typical Application Circuit
LAN1032E Pinout Definition
| Pin No. | Symbol | Function Description |
|---|---|---|
| 1 | VIN | Power Supply Input |
| 2 | GND | Ground |
| 3 | CS | Current Sense Pin |
| 5 | DR | Constant Current Drive Output, connect to LED cathode |
| 4, 6, 8 | NC | Not Connected |
| 7 | NC/PWM | Reserved / Test Pin, keep floating |
| Exposed Pad | TH | Thermal Pad, connect to GND or leave floating. Do not connect to other voltage potentials. |
LAN1032E Package Dimension
LAN1032E Key Electrical Characteristics
| Symbol | Parameter | Typical Value | Unit |
|---|---|---|---|
| OP_VDD | Operating Voltage Range | 7-48 | V |
| Iout | Maximum Output Current | 800 | mA |
| VREF_CS | Current Sense Reference Voltage | 300 | mV |
| Rds_ON | Typical Dropout Voltage | 1.2 | V |
| T_OTP | Over-Temperature Protection Threshold | 135 | ℃ |
| VIN_MAX | Maximum Input Voltage | 48 | V |
| ESD | ESD Withstand Voltage | 2000 | V |
LAN1032E Maximum Application Power Ratings
| Input Voltage | Output Voltage | Maximum Output Current |
|---|---|---|
| 12-14V | 9V | 800mA |
| 12-20V | 9V | 400mA |
| 24V | 18V | 500mA |
| 12-14V | 12V | Not recommended for strict low dropout applications |
GS Micro Linear Automotive Lighting Driver IC Comparison
| Part No. | Package | Voltage Rating | OTP Temperature | Matched LED Chip | Max Operating 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 |
LAN1032E Application Notes
Power Supply & Start-up: Powered via VIN pin. The IC starts operating when input voltage exceeds 7V. Optimal MOSFET performance is achieved when VIN ≥ 11V.
Output Current Setting: Io = 0.3V ÷ Rcs. The output current can be precisely set by adjusting the external resistor connected to CS pin.
Wide Voltage Surge Protection: The built-in high-voltage protection activates when input voltage rises excessively, reducing output current to avoid component damage. The LED remains lit steadily from 10V to 40V.
Reverse Polarity Protection: Integrated reverse polarity protection diode prevents IC damage caused by reversed power connection.
Over-Temperature Regulation: Current folds back automatically at 135°C, keeping LED chip temperature below 125°C, suitable for fanless luminaire applications.
PCB Layout Guidelines: The exposed thermal pad of ESOP8 package must be firmly attached to aluminum or copper substrate. Widen all high-current traces.
LAN1032E Ordering Information
| Part Number | Package | Marking | Packaging Type |
|---|---|---|---|
| LAN1032E | ESOP8 | LAN1032E | Tape & Reel, 4000 pcs/reel |
The LAN1032E is packed with moisture-proof aluminum foil bag. Please check the humidity indicator card before use. Reseal and store in dry environment after opening to avoid long-term exposure to humid air.
Replaceable Products & Competitive Advantages
The LAN1032E can directly replace conventional current regulator diodes (CRD), general linear constant current ICs and medium & low voltage LED driver ICs.
1. vs Current Regulator Diode: Supports 48V high voltage, adjustable current from 400mA to 800mA. Current accuracy of ±3% is far superior to ordinary CRDs. Multiple built-in protections ensure higher safety.
2. vs General Linear CC ICs: Features 9V~40V wide input range with high-voltage current foldback, delivering more stable performance under fluctuating automotive voltage. Integrated reverse polarity protection simplifies system design.
3. Only one external resistor is required for peripheral circuit, which simplifies BOM, lowers overall cost and accelerates production & debugging compared with discrete solutions.
4. 1.2V low dropout design brings lower power loss and higher efficiency, ideal for high-power automotive lamps and long-duration operating scenarios.
5. ESOP8 package with superior thermal performance and automotive-grade reliability, ensuring stable operation without LED burnout even in fanless working conditions.
About GSMicro Semiconductor
GSMicro Semiconductor (Shenzhen) Co., Ltd. was founded in 2023, evolved from Lumenchip established in 2010. Headquartered in Shenzhen, China’s tech hub, we are a leading analog IC integrated service brand focusing on mixed-signal IC R&D and application, committed to promoting green and intelligent technology.
We combine global advanced operation modes and sales channels, adopting an innovative business model integrating component distribution, market analysis, technical solution service and one-stop supply support. We operate self-owned brands and authorized distribution lines simultaneously to deliver comprehensive support for customers. We take customer demand as the core goal, providing customized products and professional solutions to global clients, helping customers achieve sustainable profitability and market growth. We devote ourselves to independent R&D, offering complete power management and intelligent control solutions for various electronic industries, and ranking top in semiconductor distribution and technical service.
GS Micro owns a full product portfolio including MCU, power management IC, AI chip, signal chain IC and power discrete devices, covering signal processing, voice interaction and intelligent control. We have established long-term strategic partnerships with well-known manufacturers worldwide, including DONGWOON, CR MICRO (PowTech), CRHJ, APM, COOLSEMI, ANHI, Reasunos, OCX, MassChip, XLSEMI, NSIWAY, EGmicro, ChipWays, AISPEECH, Aerosemi and more.
Adhering to the corporate value of "Employee-oriented, Customer-centric, Value Creation", GS Micro focuses on IC technical promotion and product localization, leading the global semiconductor segment in component distribution and application solution services.
LAN1032E Frequently Asked Questions (FAQ)
1. What are the core advantages of LAN1032E compared with conventional Current Regulator Diodes (CRD)?
The LAN1032E is a perfect drop-in replacement for traditional CRDs. It supports 48V higher withstand voltage and features adjustable output current from 400mA to 800mA, while most CRDs have fixed current rating. Its current accuracy is ±3%, much better than ±15%~20% of standard CRDs. Integrated 140°C over-temperature protection and high-voltage current foldback prevent LED burnout under fluctuating automotive voltage and high temperature. The embedded reverse polarity diode removes extra protection components and improves overall system reliability.
2. Can LAN1032E directly replace BCR401W / BCR420U?
It can fully replace them in constant current function. Please note the package difference: LAN1032E adopts ESOP8 package, while BCR401W is SOT89-3L and BCR420U is SOT89-5L/SOT223. PCB layout modification is required. If your existing PCB is designed for SOT89 package, we recommend LAN1032AT (SOT89-5L) or redesign the footprint.
3. How to calculate and set the output current of LAN1032E?
Output current formula: Iout = 0.3V / RCS, where RCS is the resistor connected between CS pin and GND. For 400mA output current, the required resistance is 0.3V / 0.4A = 0.75Ω. Use standard 0.75Ω resistor or parallel multiple resistors for precise resistance value. Ensure the resistor power rating can withstand I²R power dissipation. 1206 or larger package resistors are recommended.
4. Why can LAN1032E keep LEDs working across 10V~40V wide input voltage?
The IC is equipped with built-in high-voltage current foldback circuit. When input voltage rises, the chip reduces output current intelligently to keep LEDs dimly lit without overvoltage damage. The current will recover automatically once voltage returns to normal range. The IC guarantees continuous LED operation from 10V to 40V, perfectly matching automotive power system characteristics: 12V system voltage fluctuates 9V~14.5V, and 24V truck system ranges 18V~32V.
5. What key points should be noticed for LAN1032E PCB layout?
1. The exposed thermal pad of ESOP8 package must be fully attached to aluminum or copper substrate; poor soldering will cause chip burnout. 2. Place the CS resistor close to CS pin and GND pin to minimize current sensing error. 3. Place input capacitor (10μF~100μF electrolytic capacitor recommended) near VIN and GND pins. 4. Widen all high-current traces, especially tracks connected to DR pin (LED cathode) and power lines, to support 800mA continuous current.
6. How to apply for samples or place orders for LAN1032E?
GS Micro provides free samples (max. 5 pcs per request) and professional technical support. Please contact us via sales hotline: +86 18018703531, or add WeChat: gsmicro_semi (remark: LAN1032E Sample). You may also send emails to sales@gs-micro.com for inquiries. Bulk orders are supplied in tape & reel packaging (4000 pcs/reel) with lead time of 3~5 working days.
7. Does LAN1032E support PWM dimming? What is the wiring solution?
Pin 7 is defined as NC/PWM reserved pin and shall be kept floating per datasheet. No official standard PWM dimming interface is released. For practical application, low-frequency dimming can be realized by switching VIN power on/off, or adding an external MOSFET in LED loop for PWM dimming (≤1kHz). Contact our technical team for detailed dimming reference design.
8. What is the over-temperature protection point? Will the IC reduce current in advance?
The built-in thermal protection circuit starts to decrease output current when junction temperature reaches 140℃ (Rev1.2 Datasheet Revision). This mechanism keeps LED chip temperature below 125℃ for effective protection. Under standard heat dissipation with aluminum substrate, when ambient temperature is 25℃, input 13V and output 800mA for 9V LED, the chip junction temperature is far below the protection threshold for long-term stable operation.
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