cxa2108aq Sony Electronics, cxa2108aq Datasheet
cxa2108aq
Related parts for cxa2108aq
cxa2108aq Summary of contents
Page 1
... Constant-Current Driver for Full Color LED Display Description The CXA2108AQ is a 1,024-gradation LED driver which is ideal for full color LED displays. This IC has 24 outputs and a maximum output current of 70mA. Time division allows driving of either two or six LEDs per output by connecting an external FET or other switch ...
Page 2
... CXA2108AQ REXT XTAO XWR XRD XR ...
Page 3
... TEST_O CLK 21 DGND – 3 – CXA2108AQ IOUT5 63 IOUT4 62 IOUT3 61 IOUT2 60 IGND 59 IOUT1 58 IOUT0 AGND 56 REXT XTAO 52 XRST ...
Page 4
... These pins are used to input and output data to and from the internal DGND RAM (luminance data, brightness data and drive current data RAM). See DV Table 1. Read/Write Switching CC Condition Correspondence Table for the data I/O switching conditions DGND – 4 – CXA2108AQ Description ...
Page 5
... Timing Charts.) Voltage supply terminal for cathode of positive protection diode which connected to drivers (IOUTO to IOUT23) and REXT (55pin). Normally,connect to LED DC supply. However ,when the LED DC supply voltage exceeds 10V,VPD must be set 10V or less. – 5 – CXA2108AQ Description ...
Page 6
... This is used as the LED switching signal. (See the Timing Charts and Application Circuits for details.) Thermal Alarm Out signal output. This pin normally outputs high level, but it outputs low level when the internal temperature rises to an abnormally high level. – 6 – CXA2108AQ Description 1 ...
Page 7
... Enable Disable Disable Disable Disable Enable Disable Disable Disable Disable Enable Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable Disable – 7 – CXA2108AQ Description [I/O] Read Disable Output Enable Output Disable Input Disable Input Disable Hi-Z Disable Hi-Z Disable Hi-Z Disable Hi-Z ...
Page 8
... In addition, these values assume the case where all channels are set to the same drive current. Io (FFh) [mA] Istb [mA] Pstb [W] 0.111 21.7 22.3 0.190 43.3 38.1 65.0 53.8 0.269 1 86.7 69.6 0.348 17.3 18.4 0.092 0.155 34.7 31.1 0.218 52.0 43.7 69.3 56.3 0.281 14.4 15.9 0.079 28.9 26.4 0.132 0.184 43.3 36.9 0.237 57.8 47.4 12.4 14.0 0.070 24.8 23.1 0.115 37.1 32.1 0.160 0.205 49.5 41.1 0.063 10.8 12.7 21.7 20.6 0.103 32.5 28.4 0.142 43.3 36.3 0.182 800 Iref (16/3 + 24. 1)) – 8 – CXA2108AQ Po (max) [W] 1.39 1.31 1.23 1.15 1.41 1.34 1.28 1.22 1.42 1.37 1.32 1.26 1.43 1.38 1.34 1.29 1.44 1.40 1.36 1.32 ...
Page 9
... 5V 4mA –2mA 5V 4mA CC OL 133 133 Output load 50pF or less – 9 – CXA2108AQ Max. Unit Typ. MHz 15 1300 mV 1365 bit 2 bit 8 bit ±0.8 LSB 70 mA VPD + 0 µA 5 µ ...
Page 10
... Note) The address is not latched internally not change the address while XWR is low. (1) Read mode (XR XRD Note) The address is not latched internally not change the address while XRD is low CWR T SWR CRD T T SRD HRD T PDD – 10 – CXA2108AQ T HWR ...
Page 11
... Electrical Characteristics Measurement Circuit DC Characteristics Measurement Circuit Logic Tester 5V 0V 15MHz 5V 10V XRST MODE XR/W IOUT0 to 23 XRD XWR DLDI CXA2108AQ XCS CLK 2k – 11 – CXA2108AQ A 1V ...
Page 12
... Description of Operation 1. Description The CXA2108AQ is an LED driver for full color LED displays. The RGB luminance which becomes the video data is controlled by pulse width modulation (PWM), and the luminance variance of each LED is corrected by the drive current. The basic PWM clock width can be set in 16 steps from the brightness data, making it possible to adjust the brightness of the entire screen ...
Page 13
... That is to say, the necessary current differs for each LED. This drive current IOUT corresponds to the amplitude of the IOUT output PWM waveform as shown in Fig. 1. The CXA2108AQ can set this current independently for each LED using Coarse Adj. (2 bits: D8, D9) and Fine Adj. (8 bits D7). The maximum values of the drive current (Io (FFh): IOUT @ FFh) are varied in 4 levels by Coarse Adj ...
Page 14
... Operating modes (Upper/Lower, Upper/Lower/RGB) The CXA2108AQ has the following two operation modes which are set by the MODE pin. 4-1. Upper/Lower mode (MODE = low) In this mode, two LEDs are driven by time division for each IOUT output. First, PWM waveform output starts triggered by the DLDI input signal. In this mode, two kinds of luminance data are output by time division for each output ...
Page 15
... UB • 0000000000 MODE Upper/Lower/RGB Note) X: Don't care Fig. 3. Relationship Between Memory Address and Data (Luminance Data Dv, Brightness Data Db) Can't use Brightness Data Don't use Upper/Lower – 15 – CXA2108AQ IOUT23 IOUT22 IOUT21 • • IOUT4 IOUT3 IOUT2 IOUT1 IOUT0 a ...
Page 16
... UG • 1000110000 1000101111 • UR • 1000011000 1000010111 • UB • 1000000000 Upper/Lower/RGB MODE Fig. 4. Relationship Between Memory Address and Data (Drive Current Data Dd) Can't use Upper/Lower – 16 – CXA2108AQ IOUT23 IOUT22 IOUT21 • • IOUT4 IOUT3 IOUT2 IOUT1 IOUT0 a ...
Page 17
... CXA2108AQ ...
Page 18
... CXA2108AQ ...
Page 19
... CXA2108AQ ...
Page 20
... CXA2108AQ ...
Page 21
... CXA2108AQ ...
Page 22
... CXA2108AQ ...
Page 23
... CXA2108AQ ...
Page 24
... CXA2108AQ ...
Page 25
... IOUT6 IOUT7 IOUT8 IOUT9 IOUT10 IOUT11 IOUT12 IOUT13 IOUT14 IOUT15 IOUT16 IOUT17 – 25 – CXA2108AQ ...
Page 26
... IOUT6 IOUT7 IOUT8 IOUT9 IOUT10 IOUT11 IOUT12 IOUT13 IOUT14 IOUT15 IOUT16 IOUT17 – 26 – CXA2108AQ ...
Page 27
... DETAIL A SONY CODE EIAJ CODE JEDEC CODE 80PIN QFP (PLASTIC 0.15 0.35 – 0.1 M 0.2 PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT QFP-80P-L01 QFP080-P-1420 LEAD MATERIAL PACKAGE MASS – 27 – CXA2108AQ + 0.1 0.15 – 0.05 0. 0.2 0.1 – 0.05 + 0.35 2.75 – 0.15 EPOXY RESIN SOLDER PLATING 42/COPPER ALLOY 1.6g ...