TPIC84125TPWPRQ1 Datasheet, PDF (1/29 Pages) Texas Instruments – LOW-FREQUENCY ANTENNA DRIVER FOR PASSIVE START AND PASSIVE ENTRY

TPIC84125-Q1
www.ti.com
LOW-FREQUENCY ANTENNA DRIVER
FOR PASSIVE START AND PASSIVE ENTRY
Check for Samples: TPIC84125-Q1
SLDS175 – AUGUST 2010
FEATURES
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• Output Stage Consists of Eight Programmable
Half-Bridge MOSFET Drivers (Configurable in
Half, Full, or Parallel Bridges) Which Deliver
Modulated Current to Each Coil
• Linear Mode Output: Generates a Sine Wave
Voltage That is Controlled by the
Microcontroller
• Output Stage is Overload Protected for Short
and Over Temperature
• Driver Control and Diagnosis Blocks Drive the
Gates of the MOSFETS Via Data From the SPI
• Antenna Diagnostics: Short to GND, Short to
VBAT, And Open Load Via Current
Measurement
• Divider Block Generates an Internal Frequency
From the Input Clock (Main Controller); Used
for the Internal Logic
• Sophisticated Failure Detection and Handling
• HTSSOP (PWP) 28-Pin Package
• Operating Temperature Range:
-40°C to +105°C
APPLICATIONS
• Automotive Passive Start and Passive Entry
Applications
DESCRIPTION
The low-frequency (LF) antenna driver is dedicated to automotive applications requiring passive entry or passive
start operational control. It allows for up to eight dedicated drivers, consisting of MOSFET transistors. The device
also incorporates sophisticated diagnosis, protection and monitoring features.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated