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NXP Semiconductors
PNX15xx/952x Series
Volume 1 of 1
Chapter 1: Integrated Circuit Data
PNX15XX_PNX952X_SER_N_4
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 4.0 — 03 December 2007
1-50
The standby mode is obtain by specically turning off the different clocks, i.e. it is not
just a simple bit to ip into a register. Once all the clocks have been shutdown the
power dissipation is at most 300 mW (includes leakage current) at 85 C (case
temperature).
5.4 Power Consumption
The power consumption of the PNX15xx/952x Series is dependent on the activity of
the TM3260, the number of modules operating, the frequencies at which the system
is running, the core voltage, as well as the loads at board level on each pin. For these
reasons it is difficult to provide precise power consumption numbers.
5.4.1
Typical Power Consumption for Typical Applications
Three main techniques can be applied to reduce the ‘Out of the Box’ power
consumption of the PNX1500 system:
Turn off the unused modules. After reset, the modules are clocked with a 27 MHz
clock (input crystal clock, XTAL_IN). Turning off the clocks of the unused modules
signicantly reduces the power consumption.
Run the PNX1500 system with the adjusted clock speeds for each active module.
This can include dynamic tuning to the TM3260 speed.
Powerdown the TM3260 every time the OS (Operating System) reaches the idle
task.
Example:
Table 20 presents a typical case (not optimized for power consumption
savings).
Typical power consumption for typical applications on PNX15xx/952x Series is
expected to ranges from 1.2 W to 2 W.
5.4.2
Expected Maximum Currents
Table 21 presents estimated maximum currents, i.e. all modules operating at full
speed which is not what a real application will do. Board design, i.e. decoupling and
regulators, should plan for peak current. Peak currents are possible for few cycles it is
not sustained current consumption. These peaks will be averaged out by the
decoupling capacitors, but regulators should also not be under-dimensioned.
Table 20: MPEG-2 Decoding with 720x480P Output on PNX1502
PNX1502
1.3 V - VDD
2.6 V - VCCM
3.3 V - VCCP
Total
mA
1002
104
53
n/a
W
1.302
0.270
0.175
1.747
Table 21: Estimated PNX15xx/952x Series Maximum and Peak current
PNX15xx/952x
Series
VDD
VCCM
VCCP
Maximum, mA
1400
300
200
Peak, mA
2000
500
300