XD3914 – LED Dot/Bar Display Driver – Xinluda

The Xinluda XD3914 is a monolithic LED dot/bar display driver in a DIP-18 package that senses analog voltage and drives 10 LEDs with a linear, programmable, current-regulated output. An LM3914-type level-meter driver, user-selectable between bar and dot display modes.

The Xinluda XD3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs to provide a linear analog display. A single pin switches the display between a moving-dot mode and a bar-graph mode, making it a flexible, drop-in LM3914-type level-meter driver. Because the drive current to each LED is regulated and individually programmable, the design eliminates per-LED ballast resistors and allows the entire system to operate from a supply of less than 3V.

The device contains its own adjustable reference and an accurate 10-step voltage divider. A low-bias-current input buffer accepts signals down to ground (V-) and withstands inputs up to plus or minus 30V without damage or false outputs. The buffer drives 10 individual comparators referenced to the precision divider, holding indication non-linearity to typically half a percent even over a wide temperature range. Multiple XD3914 devices can be chained to build displays of 20 to over 100 segments.

Key Features

• Senses analog voltage and drives 10 LEDs in a linear analog display
• Bar or dot display mode externally selectable by the user (pin 9)
• Output current programmable from 2 mA to 30 mA, eliminating external LED resistors
• LED driver outputs are current-regulated, open-collector
• Internal adjustable voltage reference from 1.2V to 12V
• Internal 10-step divider is floating and can be referenced to a wide range of voltages
• Inputs withstand plus or minus 30V without damage or false outputs; inputs operate down to ground
• No multiplex switching or interaction between outputs
• Outputs can interface with TTL or CMOS logic
• Expandable to displays of 100 steps
• Operates from a single supply of 3V to 20V DC (functions below 3V)
• Operating temperature range -40°C to +85°C; maximum junction temperature 100°C; DIP thermal resistance 55°C/W

Applications

• Analog bar-graph and dot-mode level meters
• Battery-charge and fuel-gauge indicators
• Audio VU / signal-strength displays
• Visual alarm and threshold indicators
• Expanded-scale and zero-center meters (two devices)
• Sequencers, programmers, and staging controllers using the individual current outputs

Why Source XD3914 from Pacific Component Xchange

The XD3914 is a niche LM3914-class display driver with limited authorized-distributor coverage, which can make production-volume sourcing difficult. Pacific Component Xchange specializes in hard-to-find and end-of-life power-management ICs, display drivers, and optocouplers. We help engineers and buyers secure the XD3914 when standard channels come up short. Every device is sourced for authenticity and traceability, with global shipping available to keep your build on schedule. This is a Request-For-Quote part – contact Pacific Component Xchange for current availability, lead time, and pricing on the Xinluda XD3914.