Preliminary PT6709 9-Channel PWM Dimming LED Driver DESCRIPTION FEATURES PT6709 is a 9 channel current sink driver with PWM dimming control for LED applications. It contains a serial buffer and data latches which convert serial input data into parallel format. At the output stage, 9 current sinking channels are provided for driving LEDs. Each channel is equipped with programmable 8-bit PWM dimming features for RGB color manipulations. APPLICATION • LED Displays/ RGB Cluster controls • PT6709 supports 6V~24V with an external resister connected to the chip VDD pin • Each of the 9 channels can support 6V~24V with an external resister and up to 6 LEDs connected to form the 9 outputs: R1~3/G1~3/B1~3 • 8-bit (256 gray scale) per channel PWM dimming • Normal mode: 17million colors • High speed mode: 256 colors • 8051 MCU UART interface • Chip cascade function designed • Built-in power on reset • Built-in burn in mode • Maximum data input rate: 1Mbps • Package: 14-Pin, SOP BLOCK DIAGRAM B1 R1 R3 G3 Power On Reset PWM Counter Global Buffer (8-bit x 9) RC OSC VDD DIN DOUT Data Command Decoder Shift Register Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan PT6709 PIN CONFIGURATION GND 1 14 DIN TEST 2 13 Ch1/B1 DOUT 3 12 Ch2/R1 Ch7/B3 4 11 Ch3/G1 Ch8/R3 5 10 Ch4/B2 Ch9/G3 6 9 Ch5/R2 VDD 7 8 Ch6/G2 PIN DESCRIPTION Pin Name GND TEST DOUT B3, B2, B1 R3, R2, R1 G3, G2, G1 VDD DIN PRE1.0 Description Ground terminal Test pin. Please un-connect this pin during application Serial-data/Command output Open-drain, constant-current sink outputs for B LEDs Open-drain, constant-current sink outputs for R LEDs Open-drain, constant-current sink outputs for G LEDs Supply voltage terminal Serial-data/Command input 2 Pin No. 1 2 3 4, 10, 13 5, 9, 12 6, 8, 11 7 14 August 2013 PT6709 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 PRE1.0 9 August 2013