Three Independent Channel PWM Controller
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The AL5836Q is an automotive-complaint three-channel independent PWM controller offering excellent temperature stability and output ON/OFF control with current-sensing capability. It works with a wide-input voltage range from 3.5V to 50V. With an external LED driving power device or other application, the AL5836Q’s internal power dissipation is minimized compared to traditional linear LED drivers. This makes it ideal for medium-to-high current automotive LED lighting applications.
The AL5836Q has three independent drivers: PWM1, PWM2, and PWM3 control pins with individual PWM dimming and fault reporting capabilities. For improved system robustness, its PWM inputs withstand a -40 to 50V common-mode voltage range, which covers cold cranking and load dump conditions. The average current in each LED string can be regulated, with suitable options for duty cycle and battery voltage. Each individual channel has its own diagnostic to detect open load, and short circuit to ground or to battery.
For LED current-sensing applications, load currents can be easily programmed using an appropriate PWM duty-cycle control, as well as external resistors in series with the switching transistors. Multiple strings of LEDs can be operated with a single AL5836Q device.
The AL5836Q is available in the TSSOP-14 package and is automotive-compliant, qualified to AEC-Q100 Grade 1, and supports PPAP documentation.
| AEC Qualified | Yes |
|---|---|
| Compliance (Only Automotive Supports PPAP) | Automotive |
| Topology | Linear LED Driver |
| Minimum Supply Voltage (V) | 3.5 V |
| Maximum Supply Voltage (V) | 50 V |
| Maximum VOUT (V) | 50 V |
| Number of Channels | 3 |
| LED Current Sense Voltage (mV) | N/A mV |
| Output Current (mA) | External mA |
| Channel Max. Output Current (mA) | External mA |
| Accuracy (%) | 3 % |
| Dimming | PWM dimming |
| Temperature Range (°C) | -40 to 125 °C |
