AS8650 Datasheet, PDF (1/46 Pages) ams AG – High-efficient Power Management Device with High-speed CAN Interface

Datasheet
AS8650
High-efficient Power Management Device with High-speed CAN
Interface
1 General Description
2 Key Features
The AS8650 is a companion IC which combines power management
functions and a fully conforming high speed CAN Transceiver in one
high performance analog device for automotive applications. The
AS8650 is powered by the battery, provides 4 output voltage levels
of which 3 outputs can be individually programmed in the range of
1.8V to 3.3V with a maximum current consumption up to 120mA at
the LDO voltage regulator outputs. An integrated DCDC converter
with a very high efficiency for the 5V output supplies the 3 voltage
regulators and ensures a voltage stability of ± 2.5%. The
combination of DCDC converter with low-drop-out voltage regulators
makes the AS8650 suitable for all Automotive Control Units where
power efficiency is a must.
The AS8650 provides a high-speed CAN interface up to 1Mbps
communication rate conforming to ISO 11898. The AS8650 provides
wake-up via remote wake-up at CAN bus lines and a local wake pin.
The watchdog unit provides three different timing functions: start-up,
window- and time-out watchdog; configurable via the SPI and I2C
interface.
Voltage monitoring is implemented for the battery supply, DCDC
output and the 3 LDO regulator outputs. Undervoltage will be
signalled on the INTN pin to the microcontroller. All diagnostics and
status flags can be accessed with the SPI interface.
The product is available in a 36-pin QFN (6x6x0.9) package.
DCDC converter for 5V output with very high efficiency
2 programmable voltage regulators in the range of 1.8V to 3.3V
High-speed CAN interface (ISO 11898) with remote wake-up
Comprehensive voltage monitoring
Configurable watchdog functions for start-up, operation, and
standby
Automatic thermal shutdown protection
Excellent EMC performance with outstanding switching
technology for the DCDC converter
Ambient temperature range from -40°C to +105°C in maximum
load conditions
Lead-free 36-pin QFN (6x6x0.9) package
3 Applications
The AS8650 provides high efficient and flexible power supply
together with state-of-the-art high speed CAN Interface for
automotive control units.The device is pin compatible with AS8550
(LIN interface) in order to change from CAN to LIN easy.
Figure 1. AS8650 Block Diagram
I2C_EN
CSSPI
SCLKI2C / SCLKSPI
SDAI2C / SDISPI
SDOSPI
INTN
CANH
SPLIT
CANL
RxD
TxD
RESET
VSUP
AS8650
I2C
DC / DC Converter 5V
SPI
High-speed
CAN
Transceiver
Watchdog
Digital
Logic
WAKE
Configurable
Voltage
Regulator
Configurable
Voltage
Regulator
Configurable
Voltage
Regulator
GND
FB
LX
V5V_LDO1
V5V_LDO2
V5V_LDO3
VREG
VREG
VREG
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