GSMicro Primary Agent Automotive Linear LED Constant Current Driver IC LAN1053A
- Model：
- LAN1053A
- Brand：
- GSMicro
- Batch No：
- LAN1053A，车灯驱动芯片，汽车恒流IC，1.2A线性驱动，100V中压驱动，9V灯珠专用，精准控温，过温保护，ESOP8封装，无风扇车灯
- Desc：
- LAN1053A is a 100V medium-voltage linear constant current IC designed for 9-10V automotive LEDs. It delivers up to 1.2A output (13.5V→9V), features built-in 135°C OTP (adjustable to 120°C), 15V high-voltage current foldback, and requires only 2 external r
- Stock：
- 12000 只
LAN1053A Series Automotive LED Driver Solution | 100V Tolerance, Precise Temperature Control, 1.2A Medium-Voltage Linear Constant Current IC
Keywords:LAN1053A, LAN1053A automotive LED driver, automotive constant current IC, 1.2A linear driver, 100V medium-voltage driver, 9V LED dedicated, precise temperature control, over-temperature protection, ESOP8 package, fanless automotive lighting solution, Gs-micro Semiconductor
LAN1053A Product Overview
LAN1053A is an automotive-grade medium-voltage linear constant current IC specially designed for 9–10V LEDs supporting high power dissipation. It forms a complete constant current drive circuit with just two external resistors – extremely simple BOM, low cost, and high manufacturing yield.
LAN1053A integrates a 135°C over-temperature protection circuit, maintaining stable temperature control even under high voltage drop, keeping LED junction temperature within 130°C. Suitable for automotive high temperature and fanless operation.
LAN1053A features an internal 100V power MOSFET with maximum output current of 1.2A; normal operating dropout voltage less than 1V, resulting in low heat generation and high efficiency, suitable for 12V automotive high power dissipation applications.
LAN1053A integrates high-voltage current foldback protection. When input voltage reaches 15V, current is automatically reduced to prevent high-voltage surges from damaging the IC and LEDs. Housed in an ESOP8 high-thermal-dissipation package, suitable for harsh automotive environments.
LAN1053A Key Features
● LAN1053A requires minimal external components – only 2 resistors, simple circuit, low cost, high yield
● LAN1053A precise temperature control, LED temperature kept within 130°C, suitable for fanless automotive lighting
● LAN1053A integrates 100V power MOSFET, high voltage tolerance, strong surge immunity
● LAN1053A maximum output current 1.2A, meeting high power dissipation requirements for 9V LED automotive lights
● LAN1053A 15V high-voltage automatic current foldback, prevents over-voltage damage, safer for automotive use
● LAN1053A ESOP8 package with excellent heat dissipation, suitable for automotive high-temperature environments
LAN1053A Applications
Automotive headlights, small lamps, position lamps, tail lights, motorcycle lights – all reliably driven by LAN1053A
9–10V LED high power dissipation headlights, fanless automotive lights, DC LED lighting – LAN1053A offers strong adaptability
Construction machinery lights, outdoor lighting, and other DC-powered LED luminaires – LAN1053A delivers reliable performance
LAN1053A Typical Application Circuit
LAN1053A Ordering Information
| Model | Package | Marking | Packing Form |
| LAN1053A | ESOP8 | LAN1053A HAYYWW | Tape & Reel, 4000 pcs/reel |
LAN1053A Pin Configuration
| Pin/Area | Symbol | Description |
| 1 | VIN | LAN1053A chip power input |
| 2 | GND | LAN1053A ground |
| 3 | CS | LAN1053A current sense pin |
| 4 | S | LAN1053A power MOSFET source |
| 5 | DR | LAN1053A LED constant current drive output, connect to LED cathode |
| 6 | HLT/NC | LAN1053A no connect; temperature selection (float=135℃, GND=120℃) |
| 7 | SGND/NC | LAN1053A no connect / signal ground |
| 8 | SEL/NC | LAN1053A no connect; high voltage protection selection (float=no protection, GND=OVP enabled) |
| Exposed Pad | DR | LAN1053A LED drive output, connect to pin 5 |
LAN1053A Recommended Output Power
| Input Voltage | Output Voltage | Output Current |
| 13.5V | 9V | 1.2A |
| 13.5V | 12V | Not recommended |
| 27V | 24V | Not recommended |
LAN1053A Electrical Characteristics
| Symbol | Parameter | Condition | Typical Value | Unit |
| OP_VDD | Operating Voltage | — | 7~100 | V |
| I_VDD | Quiescent Current | VIN=12V | 180 | μA |
| VREF_CS | Reference Voltage | Io=1A | 300 | mV |
| IOUT | Output Current | — | 1.2 | A |
| T_OTP | Over-Temperature Protection | — | 135 | ℃ |
Gs-micro Linear Automotive Headlight Driver IC Parameter Comparison
| Model | Package | Voltage Tolerance | OTP Threshold | Matched LED Voltage | Max Output 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 |
Important Notes
① Output current formula: Io = 0.3V ÷ Rcs. Design current accordingly.
② It is recommended to use a 2W thermal conductive copper-clad board with high thermal conductivity insulation under the IC and thermal/electrical separation for LEDs.
③ Pin6 floating = 135°C, grounded = 120°C; Pin8 grounded enables 15V over-voltage protection.
④ For 12V high power dissipation automotive lights, LAN1053A is the preferred choice.
LAN1053A Frequently Asked Questions (FAQ)
- A: LAN1053A features 100V tolerance and is specially designed for 9V LEDs, with OTP at 135°C (adjustable to 120°C). It is suitable for high-power fanless applications such as 12V automotive lights and motorcycle lights. LAN1168ED features 200V tolerance for 24V truck lighting, OTP at 120°C, and built-in 15V high-voltage current foldback. If input is 12V with 9V LEDs, choose LAN1053A; for 24V truck systems, choose LAN1168ED.
- A: Output current Iout = 0.3V / Rcs, where Rcs is the sense resistor from CS pin to ground. For 1.2A, Rcs = 0.3V / 1.2A = 0.25Ω. The maximum output current is 1.2A (at 13.5V input, 9V LED). Exceeding this specification is not recommended.
- A: The HLT pin (pin 6) of LAN1053A sets OTP: floating = 135°C, grounded = 120°C. The chip does not support continuous adjustment via external resistor. For more precise LED temperature control, consider LAN1168ED (supports ROTP pin with external NTC). The fixed dual temperature points of LAN1053A are sufficient for most automotive lighting applications.
- A: Connect pin 8 (SEL) to ground (SGND) to enable 15V high-voltage current foldback. When input voltage exceeds 15V, the chip automatically reduces output current, preventing damage to LEDs or the IC due to high-voltage surges from the vehicle alternator (e.g., fluctuations above 14.5V). This function is strongly recommended for 12V systems.
- A: LAN1053A withstands 100V and can handle some ISO7637 surges. However, in 12V automotive environments, it is recommended to add a Schottky diode such as A7 or SS34 in series with VIN input for reverse polarity protection. For stringent surge tests (e.g., ISO7637-5a), an additional TVS (e.g., SMBJ36A) is recommended. For most civilian automotive lights, LAN1053A works well without a TVS.
- A: The exposed thermal pad must be firmly soldered to an aluminum PCB with thermal paste or adhesive to enhance heat conduction. In PCB layout, increase trace width for VIN, DR, and GND, and add copper pour around the IC for heat spreading. For fanless automotive lights (e.g., position lamps, tail lights), it is recommended to keep the IC power dissipation Pd = (Vin - Vled) * Iout ≤ 1.5W, or reduce output current below 0.8A.
- A: Please call the sales hotline +86 18018703531 or add WeChat gsmicro_semi (note LAN1053A) to request free samples. Mass production tape & reel: 4000 pcs/reel, lead time 2-4 weeks. Full technical datasheet and reference design available.
Q1: What are the main differences between LAN1053A and LAN1168ED? How to choose?
Q2: How to calculate the output current of LAN1053A? What is the maximum?
Q3: How to adjust the over-temperature protection point? Does it support external NTC for precise temperature control?
Q4: How to enable high-voltage current foldback? What is its benefit?
Q5: Does LAN1053A require external TVS or reverse polarity protection diode?
Q6: Thermal requirements for ESOP8 package? How to ensure reliability in fanless automotive lights?
Q7: How to request samples? Contact for volume purchasing?
Company Profile
Gs-micro Semiconductor (Shenzhen) Co., Ltd., established in 2023, with predecessor LUMENCHIP founded in 2010, is headquartered in Shenzhen. It is a leading analog IC brand dedicated to mixed-signal chip R&D, solution implementation, and green intelligent technology.
The company integrates hybrid distribution, market analysis, technical solutions, and one-stop supply, running parallel agency lines and proprietary brands. It provides highly competitive total solutions to customers, with power management and intelligent control solutions leading the industry.
Product portfolio covers MCU, power management, AI chips, signal chain, power devices, widely used in signal processing, voice wake-up, voice recognition, voiceprint recognition, intelligent dialogue, and more. Authorized partner brands include: Korea Dongwoon Anatech, China Resources Micro, Huajing Micro, Yongyuan Micro, Power Concepts, Anhai Semiconductor, Reasun Semiconductor, Oushuangxin, Zhongxinyuan, Shanghai Xinlong, Zhixin Semiconductor, Naxinwei, Ejyi Micro, Ruimeng Technology, Unisound, Hangzhou Sinomicro, etc.
Adhering to the core values of “Striving-oriented, customer-centric, value contribution persist,” Gs-micro continues to drive chip technology deployment and green intelligent technology development, with distribution and solution capabilities leading the global semiconductor niche market.
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