The TPS65920 and TPS65930 devices are power-management ICs for
OMAP and other mobile applications. The devices
include power-management, a universal serial bus (USB) high-speed (HS) transceiver, light-emitting
diode (LED) drivers, an analog-to-digital converter (ADC), a real-time clock (RTC), and an embedded
power control (EPC). In addition, the TPS65930 includes a full audio codec with two
digital-to-analog converters (DACs) and two ADCs to implement dual voice channels, and a stereo
downlink channel that can play all standard audio sample rates through a multiple format
inter-integrated sound (I2S)/time division multiplexing (TDM) interface.
devices supports the power and
peripheral requirements of the OMAP application processors. The power portion of the devices contains three buck converters, two controllable by a dedicated
SmartReflex class-3 interface, multiple low dropout (LDO) regulators, an EPC to manage the power
sequencing requirements of OMAP, and an RTC and backup module. The RTC can be powered by a backup
battery when the main supply is not present, and the devices include a
coin-cell charger to recharge the backup battery as needed.
The USB module provides a HS 2.0 OTG transceiver suitable for direct connection to the
OMAP UTMI+ low pin interface (ULPI), with an integrated charge pump and full
support for the carkit CEA-936A specification. An ADC is provided for monitoring signals,
such as supply voltage, entering the device, and two additional
an external ADC inputs are
input is provided for system use.
The devices provide driver circuitry to power two LED circuits
that can illuminate a panel or provide user indicators. The drivers also provide pulse width
modulation (PWM) circuits to control the illumination levels of the LEDs. A keypad interface
implements a built-in scanning algorithm to decode hardware-based key presses and reduce software
use, with multiple additional general-purpose input/output devices (GPIOs) that can be used as
interrupts when configured as inputs.
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