STP1612PW05 STMicroelectronics, STP1612PW05 Datasheet - Page 28

• Manufacturer Part Number: STP1612PW05
• Description: 16-channel LED driver with 16-bit PWM, 8-bit gain and full LED error detection
• Manufacturer: STMicroelectronics

Specifications of STP1612PW05

• Supply Voltage: 3.3 V or 5 V
• Max Clock Frequency: 30 MHz

Application information
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To avoid these drawbacks, two different approaches are possible:
●
This not only affects the efficiency, but also raises the cost of the system due to the need to
dissipate the generated heat.
Figure 18. Solution with single supply voltage
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Figure 18
each red LEDs is added. In this way, the voltage excess drops across the resistor
instead of dropping across the current generators. This solution implies a significant
reduction of the power dissipated by the chip. However the total power dissipation does
not change and a remarkable part of the power is still wasted on the series resistor.
Figure 19
LEDs (VLED) and one for red LEDs (VLED_RED), which can be derived from the
former (e.g. simply using a voltage regulator). This solution is by far the most
advantageous in terms of power dissipation. Voltage rails are tailored to the type of
LEDs they drive and the wasted power is significantly reduced as well as the heat
produced.
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SDI
SDI
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V
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V
V
V
V
V
V
V
V
V
V
V
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V
V
V
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V
V
V
V
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V
V
V
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Rred
Rred
Rred
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Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
Rred
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Rred
Rred
Rred
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shows an application with only one voltage rail (VLED). A resistor in series to
shows a solution with two separate voltage rails: one for blue and green
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
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red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
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V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
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Doc ID 15819 Rev 5
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V
V
V
V
V
V
V
V
V
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
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STP1612PW05
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F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
F,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
O,green
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VLED
VLED
VLED
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VLED
VLED
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V
V
V
V
V
V
V
V
V
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
F,red
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V
V
V
V
V
V
V
V
V
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
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V
V
V
V
V
V
V
V
V
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
O,red
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
STP1612PW05
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
F,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
O,blue
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+ V
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+ V
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Rred
Rred
Rred
Rred
Rred
Rred
Rred
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STP1612PW05
VLED
VLED
VLED
VLED
VLED
VLED
5V
5V