LD1510 LDT | Alldatasheet
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Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller LD1510 3Channel Output LED Driver with 12 bit PWM Controller Ver. 3.0 / Feb. 2009 This document is a general product description and is subject to change without notice. LDT Inc. does NOT assume any responsibility for use of circuits described. LD1510 3Channel Output LED Driver with 12 bit PWM Controller
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller LD1510
3 Channel Output LED Driver with 12 bit PWM Controller
2009.02.17
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller 2009.1.30Deleted item ; (page 17) ‘WRITING THE DISPLAY DATA’ Revised items ; (page 16) ‘1 PWM Cycle(8bit PWM Display=16384 PWMCK clocks=256x4X4Clk)’ Is revised to ‘1 PWM Cycle(8bit PWM Display=4096 PWMCK clocks=256x4X4Clk )’ (page 17, 18) ‘1 PWM Cycle ( = 14096 PWMCKs = 1024 x 4 )’ Is revised to ‘1 PWM Cycle (12 bit PWM Display = 4096 PWMCK clocks = 1024 x 4 )’ 3.0 2009.2.17Revised items ; (page 3) ‘Maximum serial input frequency : 20MHz ’ Is revised to ‘Maximum serial input frequency : 10MHz )’ (page 5) ‘CLKI Frequency 20MHZ ’ Is revised to ‘CLKI Frequency 10MHZ ’ (page 22) Change ‘TIMING DIAGRAM Data Transmission : Strobe Number ’ (page 14) Change ‘TIMING DIAGRAM : CLK Number ’ 4.0 2008.10.21- First Version1.0 2009.1.12 - Second Version Revised items ; (page 7) ‘Twsh min= 100ns’ is revised to ‘100 + N x 1ns’ ‘Twsl min= 100ns’ is revised to ‘100 + N x 1 ns’ (page 8) Strobe Transmit ‘DI : 2 times toggle when CLKI=L’ is revised to ‘DI : 5 times toggle when CLKI=L’ ‘Strobe Diagram’ is revised to new one (page 14, 15) ‘COMMUNICATION MODE TIMING DIAGRAM’ Is revised to new one ‘8Bit Mode & 12 Bit Mode’ Is revised to new one Added items ; (page 7) Twss min= 10,000ns 2.0 DateContentsVersion
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller The LD1510 is specifically designed for LED lighting or display applications. The 3-channel constant output current is controlled by 3 external resistors (IOUT = 5mA to 100mA). The device consists of 3 x 12 bit shift register, latches, built-in OSC, 3 constant current drivers and 8/12 bit PWM controller. The main applications are decorative LED lighting, indoor/outdoor LED video or message display systems.
FEATURES
- Output current : set-up at 5mA to 100mA
- 8/12bit grayscale PWM control with three external resistors
- Maximum sinking output voltage : 17V
- 5.0V CMOS compatible input
- Package : SOP16, SSOP16
- Maximum serial input frequency : 10MHz
- Built in internal RC oscillator
DESCRIPTION
VDD_R VCC ROUT GOUT BOUT Serial clock output terminalCLKO15 Serial data output when CLKI is ‘H”, strobe transmit when CLKI is “L”.DO16 Digital GND terminalDGND14 Regulator output voltageVDD_R13 LED driving voltageVCC12 Constant current output terminalsB/G/ROUT9-11 Analog GND terminalAGND8 External resistors are connected between those pins and GND for driver current setting.R/G/BREX5-7 Input data transfer mode selection. L : 8bit luminance data transfer. H : 12bit luminance data transferMOD4 Test only - Floating pinOSC3 Serial input clock terminalCLKI2 Serial data input terminalDI1 DESCRIPTIONPIN NAMEPIN NO
ORDERING INFORMATION
-40C to 85 C16 SOPLD1510-SP -40C to 85 C16 SSOPLD1510-SS TAPACKAGEPART NUMBER
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller BLOCK DIAGRAM IREF ROUT GOUT RREX DI CLKI DO LD1510 8/12 bit Counter 8/12 bit Shifter Register 12 bit Display Data Register 12 bit Display Data Register 12bit Control Data RegisterComparators Comparators Comparators BOUT 12 12 12 GREX BREX Oscillator CLKO MOD Regulator VCC VDD GND OSC
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller ABSOLUTE MAXIMUM RATINGS (Note ) Ambient temperature delated above 25oC in the proportion of 14.2mW/ oC PARAMETER SYMBOL RATING UNIT Supply Voltage Output Voltage Output Current Input Voltage GND Terminal Current CLKI Frequency Power Dissipation Operating Temperature Storage Temperature VCC VOUT IOUT VIN IGND fCK PD Topr Tstg 0~20 -0.5~20 100 -0.4~VDD+0.4 400 0.35 -40~85 -55~150 V V mA V mA MHz W oC oC Internal PWM Clock Frequency fPWMCK 12 MHz RECOMMENDED OPERATING CONDITIONS Regulator Voltage VDD 0~6.5 V DC CHARACTERISTICS SYMBOL UNIT Input Voltage VIH V MAX. VDD TYP. MIN. 0.8VDD“H” Level VIL 0.2VDD-GND“L” Level Output Voltage VOL V 0.2VDD-- DO,CLKO VOH --0.8VDD VCC Supply Voltage Vcc V18154.5 LED Driver Output Voltage VOUT V18 High Level Output Current IOH mA-1 Low Level Output Current IOL mA1 LED Driver Output Current IOUT mA100 Operating Free-air Temperature Range oC85-40 CLKI Frequency fCK MHz10 Internal PWM Clock Frequency fPWMCK MHz12108 Setup Time tsetup ns15 AC CHARACTERISTICS SYMBOL UNITMAX.TYP.MIN. Pulse Width tWH0 / tWL0 ns20CLKI Hold Time thold ns15 VDD Regulator Voltage or External Supply Voltage VDD V5.55.0 4.5 Ta = 25oC
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller
ELECTRICAL CHARACTERISTICS
(VDD = 5V, Ta = 25oC) V VDD0.8VDD-VIHH Level Input Voltage V5.55.04.5VDDVDD Regulator Voltage or External Supply Voltage %3.01.5REXT=500ʃ IOUT=100ɶ, VOUT=1.5VIOLPP1Output Current1 Pin to Pin Deviation %6.03.0REXT=500ʃ IOUT=100ɶ, VOUT=1.5VIOLCC1Output Current1 Chip to Chip Deviation %3.01.5REXT=1000ʃ IOUT=50ɶ, VOUT=1.5VIOLPP2Output Current2 Pin to Pin Deviation 6.04.0- REXT=1000ʃ, OUTn=OFF PWM=Gray0 ICC3 7.05.0-REXT=500ʃ, OUTn=OFF PWM=Gray0ICC2 mA 2.01.0-REXT=Open, OUTn=OFF PWM=Gray0ICC1 Supply Current %/V1.00.5REXT=1000ʃ%/VDDSupply Voltage Regulation %6.03.0REXT=1000ʃ IOUT=50ɶ, VOUT=1.5VIOLCC2Output Current1 Chip to Chip Deviation 0.8VDDIOH=1mAVOH V 0.2VDDIOL=1mAVOL DO,CLKOOutput Voltage uA1VOH=6.0VIOZOutput Leakage Current 0.2VDDGND-VILL Level 4.5 MIN. TYP. MAX. VVCCVCC Supply Voltage UNITTEST CONDITIONSYMBOLPARAMETER
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller AC CHARACTERISTIC TEST CIRCUIT Signal Generator VDD GND VDD IDD LD1510 ROUT GOUT BOUT *REXT GND Iref CLKI DI VL RL CL OSC MOD DC CHARACTERISTIC TEST CIRCUIT VCC ICC LD1510 ROUT GOUT BOUT IOUT *REXT GND Iref IIH IIL VIH VIL CLKI DI NOTE *REXT = RREX,GREX,BREX VDD C OSC CLKO IOL/IOH DO NOTE *REXT = RREX,GREX,BREX
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller AC CHARACTERISTICS (Ta = 25 O C unless otherwise noted) *1 : Cascade Operation *2 : N= Number of Chips in Serial *3 : N= 2000ea PARAMETER SYMBOL TEST CONDITION UNIT Propagation Delay Time (“L” to “H”) tPLH ns MAX. TYP. MIN. VDD = 5.0V VIH = VDD VIL = GND fCK = 10MHz REXT = 2.50ʄ IOUT = 19.1ɶ CL = 10.0pF RL = 150ʃ VL = 4.5V CLKI-DO Propagation Delay Time (“H” to “L”) tPHL ns2013-CLKI-DO Maximum CLKI Frequency fCKMAX (*1) MHz1080.5 Data Setup Time tsetup ns --18 Data Hold Time thold --30 --100 + 1 x N (*2) --100 + 1 x N (*2)DI Width ns twsh Maximum Clock Rise Time tr 10-- ns Maximum Clock Fall Time tf 10-- Minimum Output Rise Time tor 300- ns Minimum Output Fall Time tof 150- Pulse Width tWH0 / tWL0 ns--40CLKI tWH1 ns--40 Clock Delay tCKD ns-13-CLKO Clock Width tW ns-45-CLKO Clock Cycle tCY ns2000-100CLKO twsl twss --10,000 (*3)
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller TIMING WAVEFORM CLKI, DI, DO (Data Transmit) tr tf H L H L CLKI DI DO tpHL tWH0 tsetup thold tor tof tpLH 90% 50% 10% 90% 50% 10% 90% 50% 10% 90% 50% 10% 50% 50%50% H L tWL0 CLKI, CLKO CLKI, DI (Strobe Transmit) CLKO H L CLKI tw 50% 50%H L 50% 50%50% 50% 50% tw tCY tCY tCKD tCKD twh1 twh1 DI H L CLKI tws h H L 50% 50% 50% Twss 50% 50% 50% twsl tws h twsl tws h twsl tws h twsltws h 50% twsl
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS CLKI, DI terminal DO, CLKO terminal VDD DATA GND DO, CLKO VDD GND CLKI, DI, MOD ADJUSTING OUTPUT CURRENT The output current is determined by an external resistor. The relationship between IOUT and REXT is as follows; IOUT[A] = {1.16/(30+REXT)} * 50 OUTPUT CURRENT vs. REXT *065WT3&95 0IN N" 7
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller CONSTANT OUTPUT CURRENT The LD1510 provides a constant current output characteristics for LED display application. ; W W W W W W W W W W W W W W W W ʄ ʄ ʄ ʄ ʄ ʄ ʄ
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller LED SUPPLY VOLTAGE( VLED ) ↟ ↟ VLED Vf LD1510 VOUT ↟ ↟ VLED Vf LD1510 VOUT RL It is very important to select the proper value of Load Resistor( RL ). Because the optimal VOUT value guarantees the constant output current and long life time of LED driver IC without over power consumption. For example, let’s calculate the Load Resistor value at VLED=12V, Iout=50mA, LED Forward Voltage(Vf)=3V. 1) The full current of LD1510 = 50mA x 3 (channels) = 150mA 2) The power consumption is 150mA x VOUT voltage. - when VOUT = 1V, the power consumption is 150mW. - when VOUT= 2V, the power consumption is 300mW. Therefore, the Load Resistor (RL) = (VLED – VOUT– Vf*3) / Iout = ( 1 2 V –V O U T –9 V ) / 5 0 m A = 40Ǯ (When VOUT = 1V) Vf Vf Vf Vf
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller PACKAGE POWER DISSIPATION( PD ) The LD1510 provides many package options such as SOP16 package and SSOP16 package. The maximum allowable package power dissipation is determined as PD(max) = (Tj – Ta) / R_Theta_JA. When 3 output ports are turned on simultaneously, the actual power package dissipation is PD(act) = (IDD x VDD) + (IOUT x Duty x VOUT x 3). Therefore, to keep that PD(act) is less equal than PD(max). The maximum allowable output current as a function of duty cycle is: *PVUWT%VUZ 401 %VUZ *PVU N" ( R_Theta_JA = 75C/W ) *PVUWT%VUZ 4401 %VUZ *PVU N" 5B ( R_Theta_JA = 85C/W ) IOUT = {[(Tj – Ta) / R_Theta_JA] – (IDD x VDD)} / VOUT / Duty / 3 where Tj = 150C 1BDLBHF1PXFS%JTTJQBUJPO "NCJFOU5FNQFSBUVSF $ 1PXFS%JTTJQBUJPO 8 401 4401 SOP16, SSOP16
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller FUNCTIONAL DESCRIPTION 8bit Mode ( MOD = L) ST (Internal) 25 32 33 40 41 48 X R17 R17 R10 G17 G10 B17 B10 R27 COMMUNICATION MODE TIMING DIAGRAM R07 R00 G07 G00 B07 B00 When 2 chips are connected in series, strobe signal shall be applied after 48ea of clock input. When more than 2 chips are connected in series, strobe signal shall be applied after N x 24ea of clock input. (‘N’ is the number of chip.) **Note) Apply the strobe signal after minimum 10us from the last clock (e.g. 48th clock in 2 chips) CLKI DI 1 8 9 16 17 DO R00 R00 G07 G00 B07 B00 X X X X X X X X X
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller 12bit Mode ( MOD = H) CLKI DI 1 12 13 24 25 DO R012 R00 G012 G00 B012 B00 ST (Internal) X X X X X X X X X 37 48 49 60 61 72 X R112 R112 R10 G112 G10 B112 B10 R212 R012 R00 G012 G00 B012 B00 When 2 chips are connected in series, strobe signal shall be applied after 72ea of clock input. When more than 2 chips are connected in series, strobe signal shall be applied after N x 36ea of clock input. (‘N’ is the number of chip.) **Note) Apply the strobe signal after minimum 10us from the last clock (e.g. 72th clock in 2 chips)
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller PWM DISPLAY CYCLE The LD1510 implements the 8bit/12bit gray level of each output port using the 4 PWM sub cycles. Subcycle is consisted of 6 bit/10bit PWMCK clocks respectively. This enhancement provides a excellent energy distribution in lighting the LED and increases the visual refresh rate and reduces the flickers. D[7:0] : Display Data( 8 bit Gray Scale Data) 8bit PWM
1024 PWMCK
1st PWM Sub Cycle 2nd PWM Sub Cycle 3rd PWM Sub Cycle 4th PWM Sub Cycle 8bit PWM ON OFF ON OFF ON OFF ON OFF ROUT GOUT BOUT
1 PWM Cycle ( 8 bit PWM Display = 4096 PWMCK clocks = 256 x 4 X 4 Clk )
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller ( Case 1 ) The following examples show the PWM timing diagram for different display data.
1 PWM Cycle (12 bit PWM Display = 4096 PWMCK clocks = 1024 x 4 Clk )
1st PWM Sub Cycle 2nd PWM Sub Cycle 3rd PWM Sub Cycle 4th PWM Sub Cycle ROUT GOUT BOUT ON OFF ON OFF ON OFFON OFF
512 PWMCK 512 PWMCK 512 PWMCK 511 PWMCK
512PWMCK 512 PWMCK 511 PWMCK 511 PWMCK
512 PWMCK 511 PWMCK 511 PWMCK 511 PWMCK
511 PWMCK 511 PWMCK 511 PWMCK 511 PWMCK
1 PWM Sub Cycle ( 1024 PWMCK )
D[11:0] = 0001_1111_1101b (12'h1FFD) D[11:0] : Display Data( 12 bit Gray Scale Data) ROUT GOUT BOUT ROUT GOUT BOUT ROUT GOUT BOUT
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller The following examples show the PWM timing diagram for different display data. D[11:0] : Display Data( 12 bit Gray Scale Data) ( Case 2 )
2 PWMCKs
BOUT 2 PWMCKs 2 PWMCKs 1PWMCK
2 PWMCKs 2 PWMCKs 1PWMCK 1PWMCK
2 PWMCKs 1PWMCK 1PWMCK 1PWMCK
1PWMCK 1PWMCK 1PWMCK 1PWMCK 1st PWM Sub Cycle 2nd PWM Sub Cycle 3rd PWM Sub Cycle 4th PWM Sub Cycle D[11:0] = 0000_0000_0111b (16'h0007) D[15:0] = 0000_0000_0110b (16'h0006) D[11:0] = 0000_0000_0101b (16'h0005) D[11:0] = 0000_0000_0100b (16'h0004)
1 PWM Cycle (12 bit PWM Display = 4096 PWMCK clocks = 1024 x 4 Clk)
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller APPLICATION DI CLKI LD1510 ROUT RREX VDD System Controller VLED = 24V GOUT BOUT VCC GREX BREX GND C 4.7uF MOD DO CLKO CSSE1 - VLED = 24V (if RED VF=3.4V, GLED VF=2.8V, BLED VF=2.6V) DI CLKI LD1510 ROUT RREX VDD GOUT BOUT VCC GREX BREX GND C 4.7uF MOD DO CLKO OSC OSC V 11V 12V 9V 11V 12V VDD DI CLKI LD1510 ROUT RREX VDD System Controller VLED =24V GOUT BOUT VCC GREX BREX GND C 4.7uF MOD DO CLKO DI CLKI LD1510 ROUT RREX VDD GOUT BOUT VCC GREX BREX GND C 4.7uF MOD DO CLKO OSC OSC V 9V 9V VDD CASE2-
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller DI CLKI LD1510 ROUT RREX VDD System Controller VDD VLED GOUT BOUT VCC GREX BREX GND C MOD DO CLKO CASE3- 8bit Luminance Data and VLED = 7 ~ 18V DI CLKI LD1510 ROUT RREX VDD GOUT BOUT VCC GREX BREX GND C MOD DO CLKO DI CLKI LD1510 ROUT RREX VDD VDD VLED GOUT BOUT VCC GREX BREX GND MOD DO CLKO CASE4- 8bit Luminance Data and VLED = 4 ~ 6V DI CLKI LD1510 ROUT RREX VDDGOUT BOUT VCC GREX BREX GND MOD DO CLKO System Controller OSC OSC OSCOSC
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller DI CLKI LD1510 ROUT RREX VDD System Controller VDD VLED GOUT BOUT VCC OSC GREX BREX GND C MOD DO CLKO CASE5 - 12bit Luminance Data and VLED = 7 ~ 18V DI CLKI LD1510 ROUT RREX VDD GOUT BOUT VCC OSC GREX BREX GND C MOD DO CLKO DI CLKI LD1510 ROUT RREX VDD VDD VLED GOUTBOUT VCC GREXBREX GND MOD DO CLKO CASE6 - 12bit Luminance Data and VLED = 4 ~ 6V System Controller DI CLKI LD1510 ROUT RREX VDDGOUTBOUT VCC GREXBREX GND MOD DO CLKO OSC OSC
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller TIMING DIAGRAM FOR DATA TRANSMISION STROBE
24 Clocks
D4<1:24>
24 Clocks 24 Clocks
D3<1:24> 3rd chip data 4th chip data D2<1:24> D1<1:24> 2nd chip data 1st chip data 8bit Mode ( MOD = L) STROBE
36 Clocks
D4<1:36>
36 Clocks 36 Clocks
D3<1:36> 3rd chip data 4th chip data D2<1:36> D1<1:36> 2nd chip data 1st chip data 12bit Mode ( MOD = H) Case of 8 chips DIN STROBE D4<1:24> D3<1:24> 7th chip data 8th chip data D2<1:24> D1<1:24> 6th chip data 5th chip data 8bit Mode ( MOD = L) STROBE
24 Clocks24 Clocks
D4<1:24> D3<1:24> 3rd chip data 4th chip data D2<1:24> D1<1:24> 2nd chip data 1st chip data For example - Using 4 CHIPS
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller PACKAGE OUTLINE DIMENSION #8 #9 #16 5.99 5.0 1.5 0.15 0.3 Max. 0.229 0.635 Unit : mm 3.91 1.63 MAX 0.635 0.254 SSOP1
Ver3.0 LD1510 3Channel Output LED Driver with 12 bit PWM Controller SOP16 #8 #9 #16
6.2 MAX
1.5 0.25 0.51 0.56 1.27 Unit : mm 4.0 MAX 1.75 1.27 0.25