M66503ASP Datasheet | Mitsubishi Electric

MITSUBISHI MITSUBISHI 〈DIGITAL 〈DIGITAL ASSP ASSP 〉 〉 M66503ASP/AGP M66503ASP/AGP 16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH 16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH DESCRIPTION The M66503A is a constant current LED driver IC, whose output current is variable. The IC’s functions include 16-bit serial input/parallel output shift register with output latch. The product uses Bi-CMOS process for highly accurate constant current driving, permitting high-efficiency LED driving without using a resistor that limits LED current. Settings for the LED drive current are made by an external resister, thereby ensuring a maximum output current of 30 m A, enough for anode-mon LED driving. Furthermore, the pin configuration of the IC permits easier wiring on a printed board. Features - Anode-mon LED driving - Constant current output: Set to a value within a range between 0 and 30m A with an external resistor only. Simultaneous lighting available. - Pins (OEA, OEB) provided for forced ON/OFF of LED drive current. - Greater noise margin: Total-input Schmitt circuit is employed to deal with longer wire lengths. - Input/output CMOS patible - Serial data output provided (SQ15) - 5V single power supply - Pin configuration for easier wiring on printed board APPLICATION LED array drivers for display panel and printer. Other various LED modules. FUNCTION The M66503A is a constant current LED driver for anodemon LEDs. To set the LED driving current, an external resistor is connected between the current setting input pin, RC, and GND. In this way it is possible to set a highly accurate drive current. Each bit of the shift register is made up of a flip-flop performing shift function and a latch connected to the output. When the clock input pin, CKS, goes from “L” to “H”, data is shifted. Serial data is entered to the shift register via the serial data input pin, A. Data on A is straight shifted. By turning the latch enable input pin,...