PT6991 Front Panel LED Control/Driver Power with Standby Management DESCRIPTION FEATURES The PT6991 is designed to integrate the LED driver, key-scan matrix, infrared (IR) remote control decoding and into one integrated solution. All functions are programmable using I2C interface. In standby operation, the PT6991 provides the standby power management to the chipset for low power consumption. The PT6991 is housed in 32-pin SOP package. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. • • • • • • • • APPLICATIONS • • • • • VCR DVD recorder Home theater Set-top box and other application that require a compact, integrated solution • HTiB (Home theater in a box) • Personal video recorders (PVRs) • • • • IC front panel LED controller driver Standby power management to the host 5.0V (VDD) supply and 3.3V interface for the IC IR remote control decoder (Philips, NEC, Thomson, Sony, Matsushita) Multiple display modes ( 10 segments and 6 digits to 12 segments and 4 digits ) External resistors necessary for all logic outputs (N-CH. Open drain) Key scanning (up to 10 x 1 matrix = 10 keys) I2C serial interface (SCL, SDA) communication protocol Programmable hotkeys for IR remote control command Programmable hotkeys for KEYSCAN command Low power consumption in standby mode Dimming circuit (8 steps) Available in SOP-32 package BLOCK DIAGRAM STBY IR_DATA_IN READY Remote control Decoder VDD (5.0V or 3.3V) IRQ_N VSS (0V) Command Decoder SDA SCL I2C Serial I/F 12 Display Memory (12 x 6) SG1/KS1 10 12-bit Output Latch Segment Drivers SG10/KS10 2 VDD 500KHz oscillator Timing Generator key scan and Dimming circuit RSTB SG11/GR6 Grid/Segment Drivers SG12/GR5 2 1 K1 2 Data Selector Key Data Memory (1 x 10) 6 6-bit Shift Register GR4 4 Grid Drivers GR1 Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT6991 FUNCTION DIAGRAM IR_DATA_IN PT6991 Key Scan Key scan IR Decoder 10 SG/KS 10 SG/GR 2 GR 4 IRQ_N READY Main Board SDA Front Panel Controller and Driver SCL STBY Power to main board Power to Main board Light-emitting diode Display(LED) Power to Front Panel Power to Front Panel board Power Supply Board TYPICAL APPLICATION CIRCUIT V 1.1 2 September 2010 PT6991 ORDER INFORMATION Valid Part Number PT6991-S Package Type 32 pins, SOP, 300mil Top Code PT6991-S PIN CONFIGURATION V 1.1 3 September 2010