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| Princeton Technology Corp. 16 Bits Shift Register Latched Constant Current Driver IC Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT6957 DESCRIPTION PT6957 is an LED Driver IC utilizing CMOS Technology used to unify the luminance of the LED panel. It is equipped with 16 bits Shift Register and Latched Constant Current Driver, Serial I/O interface for multiple chips, Cascading and Serial Input, Parallel Output for LED Interface. Pin assignments and application circuits are optimized for easy PCB layout and cost saving advantages. FEATURES * * * * * * CMOS Technology Serial I/O, Parallel Output Interface Cascade Extension Constant Current Output (adjustable by external resistor for 0 to 30mA) Output-enabled Control (ENA, ENB) Available in 28-pin, SO Package APPLICATION * LED Panel Driver PT6957 v1.0 1 Updated October 2000 Princeton Technology Corp. 16 Bits Shift Register Latched Constant Current Driver IC Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT6957 PIN CONFIGURATION DGND S IN CLK STB NC Q0 Q1 Q2 Q3 PGND Q4 Q5 Q6 Q7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC RC SOUT ENA ENB Q 15 Q 14 Q 13 Q 12 PGND Q 11 Q 10 Q9 Q8 ORDER INFORMATION Part Number PT6957 Package Type 28-Pin, SO Package (300 mil) PT6957 v1.0 2 Updated October 2000 Princeton Technology Corp. 16 Bits Shift Register Latched Constant Current Driver IC Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT6957 APPLICATION CIRCUIT 1 SOU T 28 P TX XX X S IN 2 D CP Q D CP Q D CP Q D CP Q D CP Q C LK 3 28 VCC 1 DGND S TB 4 L D Q L D Q L D Q L D Q L D Q 19 ENA 25 10 PGN D PGN D ENB 25 C urrent S ettin g 27 RC G ND LE D V LE D 6 7 8 9 23 Q0 Q1 LE D Q2 LE D Q3 LE D LE D Q 15 LE D INP U T G ND LE D Note: VLED= External Power Supply (Maximum Value=7V) PT6957 v1.0 3 Updated October 2000 Princeton Technology Corp. 16 Bits Shift Register Latched Constant Current Driver IC Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT6957 APPLICATION CIRCUIT 2 SO UT 28 PTX XXX SIN 2 D CP Q D CP Q D CP Q D CP Q D CP Q CLK 3 28 VCC 1 DG ND STB 4 L D Q L D Q L D Q L D Q L D Q 19 ENA 25 10 PG ND PG ND ENB 25 RC Current Setting 27 V LE D 10K PNP G ND LED 6 7 8 9 23 Q0 Q1 LE D Q2 LE D Q3 LE D LE D Q 15 LE D NPN INPUT 1K G ND LED Note: VLED= External Power Supply (Maximum Value=7V) PT6957 v1.0 4 Updated October 2000 |
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