MLX74190 Datasheet, PDF (6/14 Pages) Melexis Microelectronic Systems – Two-Fold High Power LF Initiator With integrated Immobilizer

MLX74190
Two-Fold High Power LF Initiator
With integrated Immobilizer
2 High Level Block Diagram
MLX74190
VDD
VDDA_CAP
AGND
VDDD_CAP
DGND
REMOTE_DATA_IN
WUP
Vdda
Vddd
Digital
Pre-regulator
+ High-accuracy Band-gap
Bias current references,
automatic trimming
RBIAS
POR Porb
Digital
Regulator
Analog
Regulator
Digital_modulation
Output of line-coding state machine
RSSI
Remote_DATA_IN
Controller
Power supplies, internal
regulation and references
Start/Stop
IMMO-FSK
FSK/ASK Immobilizers
FSK_DataOut
Data
slicer
FSK_En
FSK_InSel
Band-pass filter
ASK_En
ASK_AdcOut
ADC
ASK_ADCstart
ASK_ADCready
Input stage
filter
ASK_InSel
ASK_InRg[1:0]
Immo Demod Out
Digital Modulation Signal
FSK_RX1
FSK_FB1
FSK_RX2
FSK_FB2
ASK_RX1
ASK_RX2
D_OUT
SCLK
SDI
SDO
NCS
IRQ
Porb
Test & NAND
Tree
Transmission
SPI
Registers
FSM
ASK / FSK immobilizer
Immobilizer
Diagnosis
Signal generator
FSK_DataOut
ASK_AdcOut
Immo Demod Out
Clk_32MHz
System clock
PLL x16
Clock
divider
Clk_2MHz
Counter
Master/slave
Clk_Osc
Modulator
PGA
Modulator
PGA
Duty cycle
controller
Voltage
references
Phase
Voltage
references
Phase
Sinus
DAC
Sinus
DAC
Filter
Filter
Modul+phase
Modul+phase
PGA_In_Square
LF transmission chain
Driver
I_out1
GND
VS
OUT1
Driver
VS
I_out2
OUT2
GND
Control blocks
VS
VS
Monitoring
VDD
VDD
Monitoring
Temperature
Monitoring
VS_uv
VDD_uv
OVT
TPW
Diagnosis Flag
Diagnosis
OverC flag
RBIAS
OverCurrent
protection
AC-current peak
detector
I_out1
I_out2
I_out1
I_out2
IP_SENSE
CLK_IN
EXT_CLK
CLK_OUT
OSC
RBIAS
Figure 2: MLX74190 high level block diagram
390107419001
Rev. 001
Page 6 of 14
Product Preview
Sept-2014