Highway 09 Ic Datasheet

[ P_D = (V_IN - V_LED) \times I_OUT ]

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 .

The output current is set by the sense resistor (R_sense) using the internal voltage reference: highway 09 ic datasheet

| Pin No. | Name | Function | Description | | :--- | :--- | :--- | :--- | | 1 | | Supply Voltage | Input power pin. Bypass with a 100µF electrolytic + 0.1µF ceramic capacitor close to the IC. | | 2 | GND | Ground | Common ground for input, output, and control circuitry. The tab (heatsink) is internally connected to GND. | | 3 | OUT | Current Output | Connected to the cathode of the LED string. An external sense resistor (R_sense) is placed between OUT and GND to set the current. | Pinout Diagram (Top View, TO-252) ┌─────────┐ │ 1 VIN │ │ 2 GND │ │ 3 OUT │ │ Tab=GND│ └─────────┘ Part 3: Electrical Specifications (Typical Datasheet Values) Note: Absolute Maximum Ratings should never be exceeded, even momentarily.

| 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 | [ P_D = (V_IN - V_LED) \times I_OUT

The specifications in this article are aggregated from multiple sources and represent typical values. Always test prototypes under actual operating conditions before mass production.

When designing with this IC, remember the golden rule: . Always calculate your power dissipation, oversize your copper pours, and never assume the tab is isolated. Armed with this datasheet-equivalent guide, you can confidently integrate the Highway 09 into your next lighting project. | Name | Function | Description | |

[ I_OUT = \fracV_SENSER_SENSE = \frac0.1VR_SENSE ]