AL5873Q

Automotive Three-Channel Linear LED Driver

Evaluation Boards and User Guides

AL5873QEV1-User-Guide.pdf (1.6 MB)

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Description

The AL5873Q is an automotive-compliant three-channel linear LED driver with PWM dimming and analog dimming control. Each channel can drive up to 250mA with a combined driving current up to 750mA. All three LED channels’ current of the AL5873Q are set by two reference resistors connected to the REF1 and REF2 pin. The AL5873Q regulates LED current for each channel, accurate down to ±4%, with excellent dimming performance. The AL5873Q enters standby mode to save power if no PWM signal is detected.

The AL5873Q monitors the temperature and reduces the LED current if its juncture temperature exceeds the threshold temperature. For improved system robustness the AL5783Q has input under voltage lock-out (UVLO), LED string-open /-short protection, and overtemperature protection (OTP) which are reported by a fault indicator (FAULTB) pin. The AL5873Q is available in TSSOP-16EP (Type DX) package.

Application(s)

Automotive LED Inner Lamps
Rear Light – Tail and Stop Light, Rear Turn Indicator, Parking Light, Fog Light, Reverse Light

Feature(s)

AEC-Q100 Grade 1 Qualification
Wide Input Voltage Range from 5V to 55V
Each Channel Up to 250mA Current Capability
Set Stop and Tail Current Independently Through 2 Resistors
Switch LED Current Between Stop and Tail Function Automatically via FULL Input
PWM Dimming via Both PWM Input and Power Supply
Analog Dimming via ADIM Input
Automatically Enter and Exit Standby Mode without Enable Pin
Internal Protections:
- Input Under Voltage Lock-Out (UVLO)
- LED String Open Protection
- LED String Short Protection
- Over Temperature Protection (OTP)
Thermal Fold-back if Chip Temperature Exceeds the Threshold
Fault Reporting: UVLO, OTP, LED Open, and LED Short
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device
The AL5873Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Product Specifications

Product Parameters

AEC Qualified	Yes
Compliance (Only Automotive supports PPAP)	Automotive
Topology	Linear LED Driver
Minimum Supply Voltage (V)	5 V
Maximum Supply Voltage (V)	55 V
Maximum V_{OUT (V)}	55 V
Number of Channels	3
LED Current Sense Voltage (mV)	N/A mV
Output Current (mA)	250 mA
Channel Max. Output Current (mA)	250 mA
Accuracy (%)	4 %
Dimming	Analog and PWM
Temperature Range (°C)	-40 to 125 °C