參數(shù)資料
型號(hào)： TPS65735RSNR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC32
封裝： GREEN, PLASTIC, QFN-32
文件頁(yè)數(shù)： 15/32頁(yè)
文件大小： 1324K
代理商： TPS65735RSNR
SLVSAI6
– JUNE 2011
2.11 Power Management Core Control
Various functions of the power management core can be controlled by GPIOs of an external MCU or by
setting the default state by connecting these function pins to a logic high or low level on the PCB.
2.11.1 SLEEP / Power Control Pin Function
The internal SLEEP signal between the power management device and the MSP430 can be used to
control the power down behavior of the device. This has multiple practical applications such as a
watchdog implementation for the communication between the sender (TV) and the 3D glasses (receiver)
or different required system on and off times; typically when the push-button press timing for an off event
is a few seconds in length, programmable by software in the system MCU.
If there is a requirement that the push-button press for system on and off events are different, the SLEEP
signal must be set to a logic high value (VSLEEP > VIH(PMIC)) upon system startup. This implementation
allows
the
device
to
power
down
the
system
on
the
falling
edge
of
the
SLEEP
signal
(when: VSLEEP < VIL(PMIC)).
Figure 2-13. SLEEP Signal to Force System Power Off
2.11.2 COMP Pin Functionality
The COMP pin is used to output a scaled down voltage level related to the battery voltage for input to a
comparator of a microcontroller. Applications for this COMP feature could be to generate an interrupt on
the microcontroller when battery voltage drops under a threshold and the device can then be shut down or
indicate to the end user with an LED that the battery requires charging.
Figure 2-14. COMP Pin Internal Connection
22
POWER MANAGEMENT CORE
Copyright
2011, Texas Instruments Incorporated
Product Folder Link(s): TPS65735
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