Introduction In the ever-evolving landscape of consumer electronics and power management, the "Highway 09" integrated circuit (IC) has emerged as a niche but critical component for specific automotive and industrial lighting applications. While the name "Highway 09" is not a formal designation by major semiconductor giants like Texas Instruments or STMicroelectronics, it is widely recognized in aftermarket automotive electronics and Chinese semiconductor catalogs as a high-voltage, constant-current LED driver .
| Parameter | Symbol | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | Input Voltage | V_IN | - | - | 30 | V | | Load Dump Protection | V_IN_surge | - | - | 40 | V | | Output Current | I_OUT | 0 | 1.2 | 1.5 | A | | Current Sense Voltage | V_SENSE | 0.095 | 0.100 | 0.105 | V | | Quiescent Current (no load) | I_Q | 1 | 2 | 5 | mA | | Shutdown Current (VIN<UVLO) | I_SHDN | - | 10 | 50 | µA | | Thermal Shutdown Temp | T_SD | 140 | 150 | 160 | °C | | Thermal Hysteresis | T_HYS | - | 15 | - | °C | highway 09 ic datasheet
The specifications in this article are aggregated from multiple sources and represent typical values. Always test prototypes under actual operating conditions before mass production. highway 09 ic datasheet
[ P_D = (V_IN - V_LED) \times I_OUT ]
The output current is set by the sense resistor (R_sense) using the internal voltage reference: highway 09 ic datasheet
[ I_OUT = \fracV_SENSER_SENSE = \frac0.1VR_SENSE ]