TB62709F

Features:

•Constant Current segment drivers for consistent display brightness.
•Single device saves labor and board space.
•Internal character set simplifies design efforts.
•Automatically handles multiplex and display refresh tasks.
•16 step programmable brightness control.
•Single device controls up to  four digits.
•Available in thru hole and surface mount packages.
•Data out cascade port for expansion beyond four digits.


Application

Stand-By and Blank perform similar functions in that the display is totally blank when either command is input. Stand By provides a low power consumption (<.2ma current draw on VDD) mode by turning off all internal bias currents in the internal driver circuits. The Stand-By command also cuts off the Rext bias current used to regulate the programmed constant current within the device.


Pinout




Specifications

CHARACTERISTICS	SYMBOL	RATING	UNIT
Supply Voltage	VDD	7.0	volts
LED Supply Voltage	VCC	17	volts
Source Output Current Digit 0~3	IDIG	-400	mA
Segment Drive Current Segment a~DP	IOUT	50	mA
Output Current	IOH/IOL	+/- 5	mA
Input Voltage	VIN	-0.3 ~ VDD ~+0.3	volts
Clock Frequency	FCLK	15	MHz
Total Output Current	IVDD	400	mA
Power Dissipation	PD	TB62709N: 1.78	W
		TB62709F: 0.62
Operation Temperature	Topr	-40 ~ +85	°C
Storage Temperature	Tstg	-55 ~+150	°C

Description

The TB62709N/F is an intelligent Constant Current LED display driver designed specifically for seven segment LED display applications. The stand alone device includes all of the decode, multiplex and driver circuitry necessary to control up to four seven segment LED digits. All of the information required to program up to four LED digits is input serially including a 16 step brightness control. Expansion beyond four digits is possible with a cascade connection to a second device. The device automatically refreshes and maintains the displayed information.