AUR6350 3-CHANNEL LED DRIVER with PWM CONTROLLER Description Features Driver output: Maximum of 100mA per channel AUR6350 is a 3-channel (R, G, B) current-regulated with individual external resistor setting LED Maximum driver port voltage of 17V at OFF state Modulation (PWM) luminance controller. The chip Serial-in clock frequency to 20 MHz enables serial data-in and data-out interface with built-in Built-in data buffers for cascading clock and data shift registers, internal data latches and storage PWM luminance control capability (refresh rate of registers. It is designed ideally for full-color LED 400+ Hz ) with an internal oscillator ( ~7 MHz ) decorative or general lighting, signs and display Selectable control modes of PWM output: applications. driver with a high-resolution Pulse Width 8-bits luminance data and 5-bits individual color correction ( 13 bits mode) The output current levels of the low dropout-voltage 8-bits luminance data and 6-bits global drivers are established by the built-in BandGap brightness data ( 14 bits mode ) reference voltage with external resistors. One external 8-bits luminance data with PWM current resistor is used for each channel. Built-in internal output oscillator generates a high frequency clocking signal Over temperature protection and modulation logic to provide PWM light luminance Under Voltage Lock-out control with three selectable operation modes. Data and PWM output polarity inversion function clock output buffers can be used for cascading with next Power supply voltage: 3.3V ~ 5.0V AUR6350. The PWM output polarity inversion function is designed for controlling other LED drivers especially in high power LED applications. Applications Package Information LED Decorative Lighting LED General Lighting PWM Generator and Controller Flexible Indoor/Outdoor Video or Sign Displays LCD Display Backlighting Torch/Warning Signs Automotive or Instrument Panel Lighting SOP16 2008/7/23 SSOP16 1 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Ordering Information AUR6350□ □ □ Operation Temp. Range: Shipping Code: P :Pb free with Commercial standard R :tapping and reel G :Green (halogen free) B :bulk T :tray Package Code: S :SSOP L :SOP Block Diagram VCC GND Rrext BandGap Reference and buffer 3 (R, G, B) Constant-Current Drivers Brext RCH POR GCH PWM Counter PWM Counter RREG[7:0] RCORR[5:0] STB Rout Gout Bout Internal Oscillator Plsgen POL Grext BCH PWM Counter GREG[7:0] GCORR[5:0] Time Counter BREG[7:0] BCORR[5:0] Mode Selector SFDO[39:0] MS MS 5X8 Latchs DSL DAI DAO Shift – Reg & Buffers X 40 CKO CKI 2008/7/23 2 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Typical Application 2008/7/23 3 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Pin Description PIN DAO 1 16 VCC CKO 2 15 DAI MS 3 14 CKI POL 4 13 /STB ROUT 5 12 DSL GOUT 6 11 RREX BOUT 7 10 GREX GND 8 9 BREX PIN NAME Pin Type 1 DAO DO Serial data output. 2 CKO DO Clock output signal. No. FUNCTION Mode Selection: 3 MS DI “H” for 13-bit / 5byte mode, “L” for 14-bit / 4byte mode, “Floating” for 8-bit / 3byte mode. PWM current output polarity for pulse inversion: 4 POL DI “H” for positive polarity, “L” for negative polarity. 5~7 R(G、B)OUT AO 8 GND GROUND 9~11 R(G、B)REX AI Open-drain driver current sink. Ground Pin Driver output current setting pins for external resistor connections between (R, G and B)REX and GND Serial data output selection: 12 DSL DI “H”: data to be shifted out at the falling edge of CKO, “L” : data to be shifted out at the rising edge of CKO. 13 /STB DI 14 CKI DI 15 DAI DI 16 VCC POWER 2008/7/23 Data-input strobe pulse, latches data into internal registers when /STB is low (level latch). Clock input pin for serial data transfer. Data is sampled at the rising edge of CKI Serial data input Power supply voltage input 4 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Equivalent Circuit of Inputs and Outputs 1. CKI, DAI, and /STB Pins 2. MS, DSL and POL Pins 3. CKO and DAO Pins 2008/7/23 5 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Maximum Ratings ( Ta = 25°C , Tj(max) = 140°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Voltage VCC - 0.3 ~ 7.0 V Logic Input Voltage VIN - 0.3 ~ VCC+0.3 V Driver Output Current IOUT 120 mA Driver Output Voltage VOUT - 0.3 ~ 17 V Input Clock Frequency FCKI 25 MHz GND Pin Current IGND 360 mA Power Dissipation PD Thermal Resistance Rth(j-a) 0.82 ( SSOP16 : Ta=25°C ) W 0.86 ( SOP16 : Ta=25°C ) 140.2( SSOP16 ) °C/W 133.7 ( SOP16 ) Operating Temperature Top - 40 ~ 85 °C Storage Temperature Tstg - 55 ~ 150 °C Recommended Operating Condition CHARACTERISTIC Supply Voltage SYMBOL CONDITION VCC MIN. TYP. MAX. UNIT 3.0 5.0 5.5 V Driver ON Driver Output Voltage VOUT (IOUT = 100mA) 1.0 V (see dropout voltage diagram) Driver Off IOUT Output Current IOH IOL Logic Input Voltage VIH VIL (Driver) OUT (R, G, B) 17 5 2 (Logic) SERIAL-OUT VCC = 3.0V ~ 5.5V Single Chip Operation 0.8VCC VCC GND 0.2VCC 0 20 FCKI STB Pulse Width twSTB 20 CKI Pulse Width twCLK 20 POL Pulse Width twPOL VCC = 3.0V ~ 5.5V 100 Set-up Time of DAI tsetup(D) Hold Time of DAI thold(D) 25 Set-up Time for STB tsetup(L) 20 2008/7/23 FOSC Ta = 25°C VCC = 3.0V ~ 5.5V mA -2 Input Clock Frequency Internal Oscillator Frequency 100 MHz ns 25 5.5 V 7.0 6 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY MHz AUR6350 Electrical Characteristics( VCC = 5.0V, Ta = 25°C , Tj(max) = 140°C) CHARACTERISTIC SYMBOL CONDITION MIN. Logic Input Voltage ‘H’ Level VIH CMOS 0.8VCC VCC Logic Input Voltage ‘L’ Level VIL logic level GND 0.2VCC Driver Output Leakage Current IOL VOH = 17V 1.0 VOL IOL = 2mA 0.2 VOH IOH = -2mA Logic Output Voltage (S-OUT) Driver Output Current Skew (Channel to Channel) Driver Output Current Skew (Chip to Chip) Driver Current vs. Output Voltage Regulation Driver Current vs. Supply Voltage Regulation Thermal Shutdown IOL1 IOL2 % / VOUT % / VCC TYP. VCC-0.2 VOUT = 1.0V REX = 120Ω REX = 120Ω 0.1 VOUT = 1V~3V UNIT V μA V ±3 % ±6 % 0.5 %/V REX = 120Ω 2 VCC = 3.0V~5.5V Tsd MAX. 140 160 °C VOUT = 1.0V Supply Current IDD_A (Analog Portion) REXn = 120Ω Driver ON 1.5 mA 1.5 mA all DI pins are low Supply Current IDD_D (Digital Portion) CKI = 20MHz DAI= 10MHz Test Diagram 2008/7/23 7 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 I/O Timing Diagrams: a) Timing of CKI, DAI, CKO and DAO twCLK 50% twCLK 50% 50% CKI tsetup(D) thold(D) 50% DAI 50% tpLH(C) tpHL(C) 50% 50% CKO 50% DAO (DSL=low) tpHL(D) tpLH(D) 50% DAO (DSL=high) b) Timing of CKI and STB 2008/7/23 8 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 I/O Timing Diagrams: c) Timing of STB and OUT STB 50% tor tof 90% 90% 50% OUTn 10% (current) 10% tod d) Timing of POL and OUT 2008/7/23 9 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Data Timing Diagrams: 2008/7/23 10 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Data Frames and Format: 2008/7/23 11 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY AUR6350 Output Current and Drop-Out Voltage: The output current level of individual driver is established by an external resistor REX for each channel. The output range of each driver is designed from 5mA to 100mA according to the equation below. It is recommended the voltage at driver output ports should be as low as possible for consideration of power dissipation and constant current operations. If operating driver over working temperature, AUR6350 will go into shutdown mode automatically and recover to normal mode until the junction temperature is lower than 140°C. A characteristic curve of output current levels vs. setting resistor values is displayed in the following diagram. Iout (A) = 0.6 V / REX Ω Output Current vs External Resistor 120 Iout (mA) 100 80 60 40 20 0 0 10 20 30 40 50 60 70 80 90 100 110 120 REXT (Ω) The output current is kept constant for driving multiple LEDs in series with each driver before reaching the dropout voltage limits. LEDs with various forward voltages (VF) can be used within usable voltage headroom. Typical output current characteristic of an output driver is shown below for illustrating driver dropout voltage vs. output current level. Output Current vs Output Voltage 140 120 Iout (mA) 100 80 60 40 20 0 0.0 0.5 1.0 1.5 2.0 2.5 Vout (V) 2008/7/23 12 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY 3.0 AUR6350 AUR6350 Package Specification – SOP16 Outline Drawing AUR6350 Package Specification – SSOP16 Outline Drawing 2008/7/23 13 AURAmicro CONFIDENTIAL PRELIMINARY & PROPRIETARY - DO NOT DISTRIBUTE OR COPY