User's Guide SLOA172B – June 2012 – Revised April 2013 AN-2250 LM3533 Evaluation Kit 1 Introduction The LM3533 Evaluation Module (LM3533EVM) is designed to fully evaluate the LM3533 Dual String backlight driver + 5 indicator LED driver. The LM3533EVM consists of the USB Interface Board and the LM3533 Evaluation Board. The USB Interface Board Rev 1.1 provides the hardware link between a PC and LM3533 Evaluation Board. On the PC side, the LM3533.
LM3533 Evaluation Board Schematics www.ti.com IL5 1.8V/VI/O/VIN IL4 IL3 IL2 IL1 VIN VUSB/VL VL RSL2 (10:) RSL5 (10:) RSL4 (10:) RSL3 (10:) RSL1 (10:) 1.8V RHWEN (4.7 k:) RSCL (4.7 k:) 3 2 1 6 5 4 RGB DL4 DL5 RSDA (4.
LM3533 Evaluation Board Schematics www.ti.com VUSB/VL 1.8V/VI/O/VIN VL RSASL (10:) RHWEN (4.7 k:) RSOL (4.7 k:) INT PWM SCL CALS SCL D4 D3 C4 C3 CPOUT OVP LVLED4 B3 2 1 C- GND C1 (1 PF) SCL 1.8V SDA VCC LVLED3 SW C3 (1 PF) B1 A1 C+ A2 PWM C2 (1 PF) HVLED1 16 B2 LM3533 HWEN E4 15 C1 LVLED2 LVLED5 LED N/C VSS 2.8V E3 C2 INT E2 LVLED1 HVLED2 E1 SDA USBL D1 D2 ALS1 (APDS9005) IR ALS2 (Not Populated) ALS 2 SDA 1 RINT2 RSCL (4.7 k:) RSDA (4.
Bill of Materials 3 4 www.ti.com Bill of Materials Component Symbol Value Manufacturer Part # Size/Package (L x W x H) LM3533 LED Driver Texas Instruments LM3533 (2.015mm × 1.755mm x 0.6mm) LDO 1.8V/2.8V dual linear regulator Texas Instruments LP3986 (1.55mm x 1.55mm x 0.6mm) RGB RGB Indicator LEDs Kingbright APF3236SURKZGQBDC (3.6mm x 3.2mm x 1.1mm) DL4, DL5 Red Indicator LED Rohm SML-310VTT86 0603 L1 10µH, ISAT = 1A, RL = 0.22Ω TDK VLF4014ST-100M1R0 (3.8mm x 3.6mmx 1.
Board Layout www.ti.com 4 Board Layout Figure 4. Top Layer Figure 5.
Board Layout www.ti.com Figure 6. Mid Layer 2 Figure 7.
Board Set-Up www.ti.com 5 Board Set-Up The LM3533EVM requires jumpers installed at the following headers for proper operation: 1. 1.8V/VIO/VIN: The center pin (VIO) of this three position header connects to the top side of the pull-up resistors (RSCL, RSDA, RSOL, and RHWEN). Jumper this pin to either the 1.8V output from the on board LDO or to VIN. 2. VOUT: The VOUT header connects the LM3533's boost output to the top side of the high voltage LED strings (HL1 and HL2) 3.
LM3533 Graphical User Interface 7.1 www.ti.com Main Control Tab The Main Control tab (Figure 8) contains the pulldown menu's and buttons for configuring the LM3533's global registers. The main tab is separated into different sections, where each section represents a specific register within the LM3533. When any of the pulldown menus or buttons are selected the specific data will get written to the LM3533. The exception is for the Control Bank Enable Buttons.
LM3533 Graphical User Interface www.ti.com Table 5. Run Time Ramp (0x13) Bits [5:3] Transition Time Ramp Up Bits [2:0] Transition Time Ramp Down 000 = 2048µs (Default) 001 = 262ms 010 = 524ms 011 = 1.049s 100 =2.097s 101 = 4.194s 110 = 8.389s 111 = 16.78s 000 = 2048µs (Default) 001 = 262ms 010 = 524ms 011 = 1.049s 100 =2.097s 101 = 4.194s 110 = 8.389s 111 = 16.78s Table 6.
LM3533 Graphical User Interface www.ti.com Table 9. LED Open Fault (0xB0) Bit 6 (LVLED5 ) 0 = Normal Operation 1 = Open Bit 5 (LVLED4 ) 0 = Normal Operation 1 = Open Bit 4 (LVLED3 ) 0 = Normal Operation 1 = Open Bit 3 (LVLED2 ) 0 = Normal Operation 1 = Open Bit 2 (LVLED1 ) Bit 1 (HVLED2 ) 0 = Normal Operation 1 = Open 0 = Normal Operation 1 = Open Bit 0 (HVLED1 ) 0 = Normal Operation 1 = Open Table 10.
LM3533 Graphical User Interface www.ti.com 7.2 Bank A/B Control Tab The Bank A/B Control Tab (Figure 9) contains all the register options that are unique to the High Voltage Control Banks (A and B). Table 11 through Table 15 describe these registers. Figure 9. Bank A/B Control Tab Table 11.
LM3533 Graphical User Interface www.ti.com Table 13. Bank A or Bank B Full Scale Current (0x1F, 0x20) Bits [4:0] Full-Scale Current (800µA per setting) 00000 = 5mA : : 10011 = 20.2mA (Default) : : 11111 = 29.8mA Table 14.
LM3533 Graphical User Interface www.ti.com 7.3 Bank C, D, E, and F Tab Each low voltage Control Bank (C, D, E, and F) has its own tab. Each tab has all the register options that are unique to each of the low voltage control banks and the pattern generators. Table 16 through Table 24 describe these registers. Figure 10. Low Voltage Control Bank Tab Table 16.
LM3533 Graphical User Interface www.ti.com Table 17. Bank C/D/E/F High Brightness (0x42, 0x43, 0x44, 0x45) Brightness Code Bits[7:0} When the Mapping Mode is set for exponential mapping (Control Bank_Brightness Configuration Register Bit [2] = 0), the current approximates the equation: (3) When the Mapping Mode is set for linear mapping (Control Bank_Brightness Configuration Register Bit [2] = 1), the current approximates the equation: (4) Table 18.
LM3533 Graphical User Interface www.ti.com Each low voltage control bank has its own pattern generator control. Bank C has Pattern Generator 1, Bank D has Pattern Generator 2, Bank E has Pattern Generator 3, and Bank F has Pattern Generator 4. Each pattern generator has registers that control the pulse high time, pulse low time, pulse rise time, pulse fall time, pulse delay from when the pattern is enabled, and the pulse low brightness.
LM3533 Graphical User Interface www.ti.com For Exponential Mapping Mode the low-level current becomes: (5) For Linear Mapping Mode the low-level current becomes: (6) 7.4 LOW BRIGHTNESS (0x73, 0x83, 0x93, 0xA3) Table 23. Rise Time (0x74, 0x84, 0x94, 0xA4) Bits [2:0] tRISE (from ILOW to IHIGH) 000 = 2048µs (Default) 001 = 262ms 010 = 524ms 011 = 1.049s 100 = 2.097s 101 = 4.194s 110 = 8.389s 111 = 16.78s Table 24.
LM3533 Graphical User Interface www.ti.com 7.5 ALS TAB The Ambient Light Sensor (ALS) tab (Figure 12) contains all the registers that are applicable to the LM3533's ALS interface. Table 25 through Table 34 describe these registers. Figure 12. ALS Tab Table 25. ALS Configuration (0x31) Bits [5:3] ALS Average Times Bit 2 Fast startup Enable/Disable 000 = 17.92 ms 001 = 35.84ms 010 = 71.68ms 011 = 143.36ms 100 = 286.72ms (Default) 101 = 573.44ms 110 = 1146.88ms 111 = 2293.
LM3533 Graphical User Interface www.ti.com Table 27. Down Delay (0x33) Bits [4:0] Down Delay Settings (# Indicates total average periods required to force a change in the down direction) 00000 = 6 (Default) : : : 11111 = 37 Table 28.
LM3533 Graphical User Interface www.ti.com Table 32. ALSM1 Zone Target Registers (ADDRESS 0x60 - 0x64) Address Function 0x60 ALSM1 Zone Target 0 0x61 ALSM1 Zone Target 1 0x62 ALSM1 Zone Target 2 0x63 ALSM1 Zone Target 3 0x64 ALSM1 Zone Target 4 Table 33. ALSM2 Zone Target Registers (ADDRESS 0x65 - 0x69) Address Function 0x65 ALSM2 Zone Target 0 0x66 ALSM2 Zone Target 1 0x67 ALSM2 Zone Target 2 0x68 ALSM2 Zone Target 3 0x69 ALSM2 Zone Target 4 Table 34.
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