Kontron SMARC-sAL28, Руководство пользователя

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SMARC-sAL28 User Guide. Rev. 1.0
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6.4. Power Control
6.4.1. Power Supply
The SMARC-sAL28 supports a power input from 3.0 to 5.25V. The supply voltage is applied through the VCC pins
(VCC) of the module connector. Considered current rating of protective device is part of End-Equipment.
Table 26: Power Supply Specifications
Voltage rail Required range Controller Frequency
V_5V0_IN 3.0V – 5.25V Input power -/-
V_3V3_S5 3.15V – 3.45V Buck-Boost 2.4 MHz PFM
V_1V8_S5 1.71V – 1.89V LDO -/-
V_3V3_S0 3.15V – 3.45V Switch TPS22964 -/-
V_1V8_S0 1.7V – 1.9V Buck TLV62084A 2 MHz PWM/PFM
V_1V35_S0 1.283V – 1.45V Buck TLV62084A 2 MHz PWM/PFM
V_1V0_S0 0.97V – 1.03V Buck TLV62084A 600 kHz PWM
V_1V0_SVDD_S0 0.971V – 1.05V Buck TLV62084A 2 MHz PWM/PFM
V_0V675_VTT 0.6415V – 0.725V LDO -/-
6.4.2. Power Button (POWER_BTN#)
The power button (Pin P128) is available through the module connector described in the pinout list. To start the
module via Power Button the PWRBTN# signal must be at least 50 ms (50 ms ≤ t < 4 s, typical 400 ms) at low level
(Power Button Event).
Pressing the power button for at least 4 seconds will turn off power to the module
(Power Button Override).
The module starts automatically after power up to the payload state S0. There is one bit
in the NVM where this automatism can be changed: with changed bit the module will
stay in state S5 until a power up event occurred. This could be one of this events:
 Power button pressed
 One of the wake lines WOL_INT_GBE#, PCIE_WAKE# or RTC_INT# are asserted
6.4.3. Power Management Signals
Following management signals are implemented:
 VIN_PWR_BAD#: Power bad indication from Carrier board. The Module power supply will not be enabled
while this signal is held low by the Carrier. VIN_PWR_BAD# is pulled up on Module. VIN_PWR_BAD# is the
enable signal for the 3.3V buck-boost converter on the module (first POL converter).
The following parameters should be delivered from the carrier board:
 Voltage Ripple maximum 100 mV peak to peak 0-20 MHz to 20 ms rise time from
input voltage <10% to nominal VCC
 Max allowed inrush current: connector limit (15 W @ 3,0 V)
 There are 5x 47u 1210 10 V bulk capacitors too meet the required noise and ripple
requirements.