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TSSOP-16EP.pngMedium Voltage DC-DC LED Driver
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The AL8871Q is an LED driver, controller IC for driving external MOSFETs to drive high-current LEDs. The buck-boost topology controller enables it to efficiently control the current through series-connected LEDs. The 60V capability enables it to be used in a wide range of applications and drive in excess of 15 LEDs in series.
The AL8871Q is a modified hysteretic controller using a patent-pending control scheme providing high-output current accuracy. High-accuracy dimming is achieved through DC control and high-frequency PWM control.
The AL8871Q uses two pins for fault diagnosis. A flag output highlights a fault, while the multi-level status pin gives further information on the exact fault.
The AL8871Q has been qualified to AEC-Q100 Grade 1 and is automotive compliant supporting PPAPs.
• AEC-Q100 Grade 1 Qualified
• Wide Input Voltage Range: 5V to 60V
• Operating Frequency Up to 1MHz
• Analog Dimming Range: 10% to 100%
• 1000:1 PWM Dimming Resolution at 500 Hz
• High Temperature Control of LED Current Using TCTRL
• Fault Reporting for Abnormal Operations
• Overtemperature Shutdown
• Available in Thermally Enhanced TSSOP-16EP Package
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• PPAP Capable (Note 4)
• Automotive Daytime Running Lights
• Automotive Head Lamps
• Automotive Fog Lamps
• Automotive Interior Lamps
| AEC Qualified | Yes |
|---|---|
| Compliance (Only Automotive supports PPAP) | Automotive |
| Topologies (Buck) | No |
| Topologies (Buck-Boost) | Yes |
| Topologies (Boost) | No |
| Topologies (Charge Pump) | No |
| Minimum Input Voltage (V) | 5 |
| Maximum Input Voltage (V) | 60 |
| Maximum Output Voltage (V) | Ext MOSFET |
| Maximum LED Current (A) | Ext MOSFET |
| LED Current Accuracy (%) | 2 |
| Switching Frequency Maximum (kHz) | 1000 |
| Dimming (PWM) | Yes |
| Dimming (Analog) | Yes |
| Efficiency (%) | 97 |
| Operating Temperature Range (°C) | -40 to 125 |
| Sense/Feedback Voltage (mV) | 225 |
| AEC-Q100 Grade | 1 |
