LM3528TMEV National Semiconductor, LM3528TMEV Datasheet - Page 24

• Manufacturer Part Number: LM3528TMEV
• Description: BOARD EVAL FOR LM3528 12MCRSMD
• Manufacturer: National Semiconductor

Specifications of LM3528TMEV

• Current - Output / Channel: 20mA
• Outputs And Type: 2, Non-Isolated
• Voltage - Output: 21V
• Features: Dimmable, I²C Interface
• Voltage - Input: 2.5 ~ 5.5V
• Utilized Ic / Part: LM3528
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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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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