AL1791 Series

Single-Channel Current-Ratio-Optimized LED Driver with Analog and PWM Dimming

Catalog

Single-Channel Current-Ratio-Optimized LED Driver with Analog and PWM Dimming

Part	Internal Switch(s)	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Voltage - Supply (Min) [Min]	Mounting Type	Dimming	Voltage - Output	Current - Output / Channel [custom]	Applications	Voltage - Supply (Max)	Supplier Device Package	Type	Number of Outputs
Diodes Inc AL1791AFE-13		-40 °C	125 °C	14-UFDFN Exposed Pad	6.5 V	Surface Mount	Analog PWM	30 VDC	1 A	Lighting	30 V	U-DFN4030-14	Linear	1

Catalog

Single-Channel Current-Ratio-Optimized LED Driver with Analog and PWM Dimming

Key Features

• Input Voltage Range: 6.5V to 30V, 1-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 PWM dimming: Support 4KHz down to sub-1%

• Internal Protections: Under Voltage Lockout (UVLO)

• LED string open/short protection

• Over temperature protection (OTP): Thermal fold-back and Thermal shut down

• Fault Reporting: UVLO, OTP, Open, and Short

• LED Power Good Reporting

• Low system BOM cost

• Ambient Temperature Range -40°C to +105°C

Description

The AL1791, a single-channel 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 MCU as emerging smart light bulb configuration. The key merits attribute to cost-effectiveness, dimming performance, low standby power, ease of system implementation, and great scalability.