DIODES AL1793AFE-13

The AL1791/1792/1793/1794 (or collectively AL179x), a single/multichannel LED driver with analog and PWM dimming control, is targeted for Tunable White/Color Smart Lighting application. It serves as the LED driving element along with AC - DC Power Conversion Block and Intelligent wireless MCU as an emerging smart - connected lighting system configuration. The key merits attribute to cost - effectiveness, dimming performance, low standby power, ease of system implementation, and great scalability. AL1791, AL1792, AL1793, and AL1794 are 1 - channel, 2 - channel, 3 - channel, and 4 - channel LED drivers, respectively. The IC is available in U - DFN - 4030 - 14 package.

The AL1791, AL1792, AL1793, and AL1794 are single - channel, dual - channel, triple - channel, and four - channel, respectively, ratio - optimized constant - current regulators optimized for Tunable White and Tunable Color, Smart Lighting applications. The maximum current channel can drive up to 500mA with a total driving current up to 1.0A, 1.5A, and 1.5A for AL1792, AL1793, and AL1794 respectively. The maximum current for AL1791 is 1A. The minimum channel current is recommended to meet channel current accuracy and short protection specifications. Each channel can still be individually controlled by either digital PWM dimming down to 0.10%@1 KHz, 0.4%@4 KHz, or 1.0%@10 KHz or analog dimming. The integrated low - side current sinks allow LED common - anode connections for cost effectiveness or different anode voltages for efficiency optimization.

The device detects fault conditions and reports its status on FAULTB pin. It features LED open detection, LED short detection, Over - Temperature Protection (OTP), and Undervoltage Lockout (UVLO). The AL179x provides supreme current matching between channels and devices. Along with bus - mode fault reporting, multiple devices can be employed together to increase current driving capability or channel count versatility.

• Input Voltage Range: 6.5V to 30V
• 1/2/3/4 - channel LED drivers: independent Analog or PWM dimming control for each channel
• Reference Current: Adjustable by an external reference resistor
• Ratio - optimized currents for 4 independent LED channels (AL1794 only): Suitable for Tunable White and Tunable Color
• Low Standby Power: With EN pin E - flicker free High Frequency PWM dimming with Deep Dimming Capability: Support 10KHz down to 1.0%, 4KHz down to 0.4%, or 1KHz down to 0.1%
• Internal Protections: Under Voltage Lockout (UVLO), LED string open/short protection Over - temperature protection (OTP): Thermal shutdown and auto thermal recovery
• Fault Reporting: UVLO, OTP, Open, and Short LED Power Good Reporting
• Low system BOM cost
• Ambient Temperature Range - 40℃ to + 125℃
• U - DFN4030 - 14: Available in “Green” Molding Compound (No Br, Sb) Totally Lead - Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device

• 1 - Channel Dimmable Smart Connected Light (SCL) Bulbs
• 2 - Channel Tunable White SCL Bulbs
• 3 - Channel Tunable White or Color SCL Bulbs
• 4 - Channel Tunable White + Color SCL Bulbs
• Smart Connected LED Tubes, Panel Lights, Troffers, and Ceiling Lights