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Technical content
16-Channel Constant Current Sink for LED Driver
DESCRIPTION
The PT6726 is a 16 -channel current sink driver for LED clusters. It contains a serial buffer and data latches which convert serial input data into parallel output format. At output stage, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs. The output current is determined by an external resistor and the brightness control code, both set by users. PT6726 can used to control LEDs intensity with output enables as PWM input function.PT6726 provides users with great flexibility and performance. Users may adjust the output current from 5mA to 90mA, which gives users flexibility in controlling the light intensity of LEDs. The PT6726 guarantees to endure maximum 17V at the output port. APPLICATION LED display/ RGB cluster control
FEATURES
16-channel constant current sink output Output current invariant to load voltage change Serial data in/parallel data out Constant output current range: 5~90mA@5V Output current accuracy: - ICs skew: < ±6% (max.) - Bits skew: < ±3% (max.) 3~5.5V supply voltage 25 MHz clock frequency Package: SOP24//QFN24 BLOCK DIAGRAM
V1.4 2 February 2019 ORDER INFORMATION Valid Part Number Package Type Top Code PT6726-S 24 Pins, SOP PT6726-S PT6726-QF 24 Pins, QFN PT6726-QF PIN CONFIGURATION PIN DESCRIPTION Pin Name Description Pin No. SOP QFN GND Ground terminal. 1 10 SDI Serial input of data shift register. 2 23 CLK Clock input of shift register, data is sampled at the rising edge of CLK. 3 24 /LE Input terminal of latch enable. Data is latched when /LE is low. And data on shift register goes through when /LE is high. 4 1 OUT[0:15] Open-drain, constant-current sink outputs. 5~20 2~15 /OE Output enable signal. Output is enabled when /OE is forced to low. 21 20 SDO Output terminal of serial-data output to the SDI of next PT6726. 22 19 REXT External resistor terminal for setting up all output current. 23 21 VDD Supply voltage terminal. 24 22
V1.4 14 February 2019 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian Dist., New Taipei City 23145, Taiwan Tel : 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw