PAM2830

PR EL IM IN AR Y DA TA SH EE T 1 ,Power Analog Microelectronics Inc PAM2830 3-Channel 60mA Constant-Current RGB LED Driver Features Applications � � � � � � � � � � � � Input Supply Voltage from 5V to 12V Output LED Pin Sustaining Voltage up to 20V Current of Each Channel Independently Adjustable by an External Resistor from 5mA to 60mA Current Skew Less Than3% Clock and Data Timing Shaped for Best Cascading Configuration Clock Frequency up to 5MHz Over-Temperature Protection for Better Reliability General Description PAM2830 is a three-channel constant current driver specially for RGB LED display applications. Each channel’s normal operating current is independently set by a corresponding external resistor that provides greater flexibility to users for adjust ing di fferent LEDs with di fferent characteristics such as brightness and color gamut. PAM2830 uses a simple two-wire interface, one wire for clock and one wire for data, for controlling output patterns. The interface is compatible with most protocols such as SM bus and GPIO used by many controllers. The chip also outputs both clock and data allowing cascading configuration and simple system design. Both clock and data outputs are shaped so that data integrity is guaranteed for large number of cascading chips. For high reliability, PAM2830 LED output pins can sustain voltage up to 20V. Operating junction temperature is allowed up to 150°C. Over- temperature protection will shut down the IC when it reaches an internal junction temperature of about 170°C. The PAM2830 is available in SSOP-20 package. � Pb-Free PackageSSOP-20 ighting ighting Entertainment L Landscape Lighting Ground Wall Indicator Architectural L City Beautification / www.poweranalog.com 11/2008 Typical Application Circuit Single Chip AGND 1 VA 2 R 0T 3 R 1T 4 R 2T 5 OE 6 LE 7 CLK 8 SDI 9 DGND 10 VB 11 SDO 12 CLK-OUT 13 LE-OUT 14 OE-OUT 15 OUT2 16 OUT1 17 OUT0 18 NC 19 VDD 20 R 1T R 2T R 3T C1 C2 C3 V (12V)DD 7.4kΩ 7.4kΩ 7.4kΩ 0.1 Fμ 4.7 Fμ VLED (24V) OE LE CLK SDI SDO -OUT LE-OUT OE-OUT CLK 20mA 4.7 Fμ PAM2830 Administrator 新建图章 Administrator 新建图章 Block Diagram PR EL IM IN AR Y DA TA SH EE T 2 www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc Typical Application Circuit Two Cascaded Chips PAM2830 3-Channel 60mA Constant-Current RGB LED Driver AGND DGND R 0 R 1 R 2 T T T LE-OUT SDO CLK-OUT OE-OUTOE LE SDI CLK VDD VA VB OUT0 OUT1 OUT2 Pre- Regulator Voltage Reference LDO1 LDO2 OTP VB DGND R R Output Driver I Set Output Driver I Set Output Driver I Set Data Latch Data Latch Data Latch Shift Register Shift Register Shift Register AGND 1 VA 2 R 0T 3 R 1T 4 R 2T 5 OE 6 LE 7 CLK 8 SDI 9 DGND 10 VB 11 SDO 12 CLK-OUT 13 LE-OUT 14 OE-OUT 15 OUT2 16 OUT1 17 OUT0 18 NC 19 VDD 20 R 1T R 2T R 3T C1 C2 C3 V (12V)DD 7.4kΩ 7.4kΩ 7.4kΩ 0.1 Fμ 4.7 Fμ VLED (24V) OE LE CLK SDI 20mA 4.7 Fμ AGND 1 VA 2 R 0T 3 R 1T 4 R 2T 5 OE 6 LE 7 CLK 8 SDI 9 DGND 10 VB 11 SDO 12 CLK-OUT 13 LE-OUT 14 OE-OUT 15 OUT2 16 OUT1 17 OUT0 18 NC 19 VDD 20 R 4T R 5T R 6T C4 7.4kΩ 7.4kΩ 7.4kΩ VLED (24V) SDO -OUT LE-OUT OE-OUT CLK 20mA 4.7 Fμ PAM2830 PAM2830 Chip A Chip B PR EL IM IN AR Y DA TA SH EE T 3 www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc Pin Description Pin Configuration & Marking Information X: Internal Code Y: Year W: Week P A M 2 8 3 0 X X X Y W W X X AGND OE LE SDI CLK R 2T R 1T R 0T VDD OE-OUT LE-OUT SDO CLK-OUT OUT0 OUT1 OUT2 1 2 3 4 5 6 7 20 19 18 17 16 15 14 8 9 10 13 12 11DGND VA NC VB TOP View SSOP-20 Pin Number Name Function 1 AGND Analog Ground 2 VA Voltage regulator output 3,4,5 RT0,RT1,RT2 Output current adjustment pins 6 OE Output enable pin. OE is low, the output ports are enabled; OE is high, the output ports are disabled. 7 LE The data transferring control pin. LE is high, the data is transferred; LE is low,data is latched. 8 CLK Clock input pin 9 SDI Serial data input pin 10 DGND Digital ground 11 VB Voltage regulator output 12 SDO Serial data output, for next cascading chip SDI input 13 CLK-OUT Clock output, for next cascading chip CLK input 14 LE-OUT LE output, for next cascading chip LE input 15 OE-OUT OE output, for next cascading chip OE input 16,17,18 OUT0,1,2 Constant current output 19 NC No connect 20 VDD Power Supply PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc 4 Absolute Maximum Ratings These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground. Supply Voltage.............................................18 Input Voltage............................- to V +0.4V Output Current per Output Channel...........+90mA Sustaining Voltage at OUT.............................. 23VV DD0.4V Storage Temperature Range.........-65 to 150°C °C Recommended Operating Conditions Ambient Temperature....................-40 to 105°C °C Junction Temperature................................165°C Thermal Information Parameter Symbol Package Maximum Unit Thermal Resistance (Junction to Ambient) θJA SSOP-20 96 °C/W PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc 5 Electrical Characteristic T =25 C and V =5.0~12.0V, unless otherwise noted.A DD° Symbol Min. Typ. Max. Unit VDD 5.0 12.0 V VVA,VVB 4.8 5.3 6.0 V H level VIH 3.5 12.0 V L level VIL GND 1.4 V IOH 40 mA IOL 40 mA VDS,SUS 20 V IOUT,LEAK 0.5 μA VOL 0.4 V VOH 4.5 V IOUT 5 60 mA IOUT 1 VDS=0.8V RTx=6kΩ 25.0 mA dIOUT1 VDS=0.8V RTx=6kΩ ±3 % IOUT2 VDS=0.8V RTx=30kΩ 5.0 mA dIOUT2 VDS=0.8V RTx=30kΩ ±3 % %/dVDS ±0.2 % / V %/dVDD ±1.0 % / V VRTX 1.24 V RIN(up) 400 750 1000 kΩ RIN(down) 400 750 1000 kΩ IDD(of f ) 1 2 4 mA IDD(of f ) 2 4 6 mA IDD(of f ) 3 3 5 mA IDD(on) 1 4 6 mA IDD(on) 2 3 5 mA TSD 170 °C TSD-HYS 40 °C Thermal Shutdown Threshold Thermal Shutdown Hysteresis RTx=6kΩ, OUT0 ~OUT2=On RTx=30kΩ, OUT0 ~OUT2=On Characteristic Test Condition Output Current of Driver LE Pin RTx=Open, OUT0 ~OUT2 =Off RTx=6kΩ, OUT0 ~OUT2 =Off RTx=30kΩ, OUT0 ~OUT2 =Off When VDS is within 1.0V and 3.0V When VDD is within 5.0V and 12.0V OE Pin VDS=20.0V IOL=+1.0mA IOH=-1.0mA (refer to VVA, VVB) DC Test Circuit, OUT0 ~ OUT2, VDS=0.8V Pull-up Resistor Pull-down Resistor - When VDD=12V VVB=5V under IOUT ≤ 0.5μA VVB=5V under IOUT ≤ 0.5μA SDO, LE-OUT, OE-OUT, CLK-OUT, at VOH=3.5V SDO, LE-OUT, OE-OUT , CLK-OUT, at VOL=1.5V OUT0 ~ OUT2 When VDD is within 5.0V and 12.0V Current Skew 2 Regulation of Output Current vs. Voltage at Output Ports Regulation of Output Current vs. Supply Voltage Change Voltage at RT0, RT1, RT2 pins Supply Voltage Output Voltage of VA,VB Sustaining Voltage Output Leakage Current SDO, LE-OUT, OE-OUT, CLK-OUT Voltage at signal output terminals Input Voltage Supply Current OFF ON Output Current Output Current 1 Current Skew 1 Output Current 2 PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T 6 www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc Switching Characteristics T 25°C,V =12V,V =1V, V =V ,V =GND,R =7.44kΩ (I =20mA),V =5V,R =150Ω,C =10pFA DD DS IH DD IL T OUT L L L= Symbol Min Typ Max Unit Frequency CLK fCLK - - 5 MHz Maximum CLK Rise Time tR - - 500 ns Maximum CLK Fall Time tF - - 500 ns LE tHL 5 - - ns SDI tHD 10 - - ns LE tSL 25 - - ns SDI tSD 5 - - ns CLK tW(CLK) 30 - - ns LE tW(L) 50 - - ns OE tW(OE) 5 - - μs OE – OE-OUT LE – LE-OUT CLK – CLK-OUT OE-OUT tpLH2 - 100 150 ns OE – OE-OUT LE – LE-OUT OE-OUT tpHL2 - 100 150 ns CLK-OUT – SDO tpHL3 - 5 20 ns Pulse Width CLK-OUT tW(CLK_OUT) 30 40 50 ns Stagger Delay Time Output Ports tS - 80 - ns OE-OUT tR(OE) - 3 15 ns LE-OUT tR(LE) - 3 15 ns CLK-OUT tR(CLK) - 5 15 ns SDO tR(SDO) - 5 15 ns Output Ports tOR - 180 220 ns OE-OUT tF(OE) - 3 15 ns LE-OUT tF(LE) - 3 15 ns CLK-OUT tF(CLK) - 5 15 ns SDO tF(SDO) - 5 15 ns Output Ports tOF - 60 100 ns - 20 30 Characteristic Hold Time Setup Time Pulse Width tpLH1 Rise Time Fall Time ns Delay time(H to L) tpHL1 - 20 30 ns Delay time(L to H) PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T Timing Waveforms www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc 7 tW(CLK) 50% 50% 50% 50% 50% 50% tSU(D) tH(D) tW(L) tH(L) tSU(L) CLK SDI LE tW(CLK) 50% 50% tW(CLK-OUT) 50%50% 50% tpHL1 tpHL3 CLK CLK-OUT SDO 50% 50% 50% 50% tpLH1 tpHL1 LE LE-OUT 50% 50% 50% 50% tpLH1 tpHL1 OE OE-OUT 50% 50% 50% tS tS OUT1 OUT2 OUT3 PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc Timing Diagram 8 Single Chip PAM2830 3-Channel 60mA Constant-Current RGB LED Driver CLK CLK-OUT SDI SDO LE LE-OUT OE OUT0 OUT1 OUT2 OE-OUT Previous Status Data1 Data2 Data3 Data4 Data5 Data6 Data1 Data2 Data3 Data4 Data6 Data5 Data4 OFF ON OFF ON OFF ON www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc Timing Diagram 9 Two Chips Cascaded PR EL IM IN AR Y DA TA SH EE T CLK(A) CLK-OUT(A) SDI(A) SDO(A) LE(A) (A) (A) LE-OUT OE OUT0 OUT1 OUT2 OE-OUT (A) (A) (A) (A) Previous Status Data1 Data2 Data3 Data4 Data5 Data6 Data7 Data8 Data9 Data1 Data2 Data3 Data4 Data5 Data6 Data7 Data9 Data8 Data7 OFF ON OFF ON OFF ON Data6 Data5 Data4 OFF ON OFF ON OFF ON CLK-OUT(B) (B) LE-OUT OUT0 OUT1 OUT2 OE-OUT (B) (B) (B) (B) SDO(B) Previous Status Data1 Data2 Data3 Data4 PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T 0 5 10 15 20 25 30 6 7 8 9 10 11 12 Vin Voltage (V) O u tp u t C u rr e n t (m A ) 0 5 10 15 20 25 30 1 1.5 2 2.5 3 Vds Voltage (V) O u tp u t C u rr e n t (m A ) 10 www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc 1. Regulation of output current vs voltage at output ports 2. Vin voltage vs output current 0 0.25 0.5 0.75 1 1.25 1.5 6 7 8 9 10 11 12 Vin Voltage (V) R e f V o lta g e (V ) 0 10 20 30 40 50 60 70 0 5 10 15 20 25 30 35 RTx (KΩ) O u tp u t C u rr e n t (m A ) Channel 1 Channel 2 Channel 3 3. Vin voltage vs reference voltage 4. Rext vs output current Electrical Characteristic V =12V,R =6k T =25 C, unless otherwise noted.DD T AΩ, ° PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T Application Information www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc 11 Setting Output Current Cascading Application Circuit Output current of each channel is set by an external resistor R . The current is calculated as: V =1.24V, R is the external resistor connected to RT pin. For example, when I =20mA, R =7.44k when I =60mA, R =2.48k The PAM2830 could be used in cascaded way as shown in Typical Application Circuit. In this application, when R =7.44k the I =20mA. The values of C1 - C6 are for reference only. For C1 and C4, tantalum capacitors with small ESR are recommended. T RT T OUT T OUT T T OUT Ω; Ω. Ω, RT OUT T V I 120 R = × PAM2830 3-Channel 60mA Constant-Current RGB LED Driver PR EL IM IN AR Y DA TA SH EE T 12 www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc Ordering Information PAM2830 X X X Number of pins Package Type Part Number Package Type MOQ/Shipping Package PAM2830NGR SSOP-20 2,500 Units/Tape & Reel Shipping Package PAM2830 3-Channel 60mA Constant-Current RGB LED Driver 13 www.poweranalog.com 11/2008 ,Power Analog Microelectronics Inc PR EL IM IN AR Y DA TA SH EE T Outline Dimensions SYMBOLS MIN NOM MAX A 0.053 0.061 0.069 A1 0.04 - 0.010 A2 0.049 0.057 0.065 b 0.008 0.010 0.012 D 0.335 0.341 0.347 E 0.228 0.236 0.244 E1 0.150 0.154 0.158 e - 0.025 - L 0.016 0.033 0.050 L1 0.041REF R 0.003 - - R1 0.003 - - h 0.010 0.015 0.020 θ 0º 4º 8º θ1 5º 10º 15º θ2 0º - - SSOP-20 1 10 E D 1120 E1 b e A1 A2 7°(4x) A h *4 5 ’ h θ L1 L 4* 1θ R R1 θ2 4* 1θ Unit: Millimeter PAM2830 3-Channel 60mA Constant-Current RGB LED Driver