GALT61120

The GALT61120, Geehy's first automotive headlamp LED matrix controller, improves the interoperability of headlamp devices and driving safety. With 12 integrated bypass switches for independent pixel-level LED control and programmable 10-bit PWM dimming, it supports innovative headlamp lighting functions. Rich peripherals allow flexible use in multiple headlamp systems, significantly reducing system cost and power consumption. It is widely used in automotive headlamp systems, high-brightness LED matrix systems, ADB adaptive headlamp systems, animated daytime running lights, intelligent interactive matrix headlamps, and intelligent projection headlamps.

Performance

Memory and interface

  • Scalable EEPROM

Clock

  • External clock, providing 8MHz or 16MHz clock signals
  • Programmable oscillators and selectable clock buffer drive strengths to achieve optimal EMI performance

Power supply

  • Input voltage range: 4.5V~60V

12 integrated bypass switches

  • 12 channels, 4 groups, 3 switches in series
  • Single-channel low on-resistance (RDS(on)), 120mΩ

Communication peripherals

  • 1 multipoint UART communication interface. Up to 31 addressable devices, compatible with CAN physical layer, with a minimum number of wires in cable harness
  • 1 I2C for external EEPROM

Analog peripherals

  • 2 8-bit ADC with multiplexer input

Timer

  • Communications watchdog timer

10-bit programmable PWM dimming

  • Single phase shift and pulse width
  • Programmable phase, improve EMI performance
  • Synchronization between devices

CRC computing unit

LED open/short circuit detection and protection

ESD

  • – Automotive-grade AEC-Q100 Grade1: operating temperature range -40℃~125℃
  • HBM=±8000V
  • CDM=±2000V

Package

  • E-TQFP48

Application

  • Automotive headlight system
  • High-brightness LED matrix system
  • ADB or glare-free high beam
  • Continuous steering and animation daytime running light

Selection Tools

Part-NoVoltage

Switch

Channels

Max Current

Per Switch(A)

ADC

Cells

ADC

Channels

PWM

Dimming

I2CUARTWDTRDS(on)

(mohm)

Temp.

Range(℃)

PackageDiagnoisis and Protection

GALT61120

4.5~60121.52*8-bit26~18111120
-40~+125
E-TQFP48Fault Diagnosis, Open Circuit Fault Diagnosis, Short Circuit Fault Diagnosis, Temperature Compensation


Block Diagram

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