AN3981 Datasheet, PDF (7/54 Pages) STMicroelectronics – LED array drivers

AN3981
STP04CM05 - 4-bit LED array driver
previous status if the junction temperature falls, typically 15-20 °C, below the thermal
shutdown threshold.
Figure 3. STP04CM05 block diagram
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Figure 4 shows a typical timing diagram of a 4-bit LED driver.
The LE pulse latches the last 4 bits loaded into the shift register through the SDI pin and
sampled by the last 4 clock rising edges.
As long as the OE pin is high, all current generators are not active. Once OE is set low, the
current generators are enabled and their status is determined by the data latched by the last
LE pulse.
Figure 4.
Typical timing diagram for a 4-bit LED array driver
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Doc ID 022217 Rev 1
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