LM3528TMX National Semiconductor, LM3528TMX Datasheet - Page 24

• Manufacturer Part Number: LM3528TMX
• Description: LM3528 High Efficiency, Multi Display LED Driver with 128 Exponential Dimming Steps and Integrated OLED Power Supply in a 1.2mm - 1.6mm uSMD Package; Package: MICRO SMD; No of Pins: 12; Qty per Container: 3000; Container: Reel
• Manufacturer: National Semiconductor

www.national.com
Figure 16 shows a write sequence to the pattern generator
programmed to output the waveform in Figure 17. In this ex-
ample HPG register bits <7:6> = 01 (for 26ms/bit) and bits
<5:3> = 010 (for 1/2 duty cycle). The pattern data in registers
(PGEN0 – PGEN2) are all loaded with 0xAC. A ‘1’ will force
the HWEN/PGEN/GPIO output low while a ‘0’ will force
HWEN/PGEN/GPIO open drain. When set for a 26ms/bit pe-
riod the pattern will be output LSB first (PGEN0, bit 0) and
repeat every
FIGURE 14. PGEN2 Register Description
FIGURE 15. PGEN3 Register Description
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When set for ½ duty cycle there will be a dead time (HWEN/
PGEN/GPIO high impedance) between each pattern and
equal to the pattern period. In applications where HWEN/
PGEN/GPIO is used to pull current through an indicator LED
a ‘1’ corresponds to the LED on and a ‘0’ corresponds to the
LED off.
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