ATA5275

Features:

• Antenna Driver Stage with Adjustable Antenna Peak Current for up to 1.5 A
• Frequency Tuning Range from 100 kHz to 150 kHz
• Automatic Antenna Peak Current Regulation
• Self-tuning Oscillator for Antenna Resonant Frequency Adaption
• Capable of Driving a High-Q Antenna
• Integrated 5 V Regulator for External Load up to 10 mA
• Bi-directional Single Wire Interface for Microcontroller or ECU
• LF Baud Rates up to 4 kbaud and Amplitude Shift Keying (ASK) Modulation
• Low Power Standby Mode < 50 µA
• Antenna Driver Diagnosis: Peak Current, Antenna Frequency and Battery Voltage Monitoring
• Power Supply Range 8 V to 24 V Direct Battery Input
• Load Dump Protection up to 45 V for 12 V Boards
• Operation at Temperature -40°C to +105°C
• EMI and ESD According to Automotive Requirements
• Highly Integrated, Fewer External Components Required
• Driver Overcurrent Protection
• Overtemperature Protection



Application

• Tire Pressure Measurement (TPM)


Pinout




Specifications

Parameters	Symbol	Min.	Max.	Unit
Ground	VSS	0	0	V
Power ground	DVSS1,2,3	-0.3	+0.3	V
Reverse protected battery voltage	DVCC1,2,3	-0.3	+44	V
Half-bridge driver output	DRV1,2,3	-0.3	DVCC + 0.3	V
Bootstrap	BOOST	-0.3	DVCC + 6(2)	V
5-V regulator output	VCC	-0.3	+7	V
Analog reference input	REXT	-0.3	VCC + 0.3	V
	RCR	-0.3	VCC + 0.3	V
Digital test mode	TM1,2,3	-0.3	VCC + 0.3	V
DIO interface supply	VDIO	-0.3	DVCC + 0.3	V
DIO interface	DIO	-0.3	DVCC + 0.3	V
Zero crossing analog input	SENSE	-2	DVCC + 0.3	V
Electromagnetic Interference	EMI		250	V/M
Minimum ESD protection (100 pF through 1.5 kΩ)			2 (on PCB)	kV
Power dissipation	Ptot		2(1)	W
Junction temperature	j		150	°C
Storage temperature	STORE	-55	+125	°C
Ambient temperature range under bias	ambient	-40	+105	°C
Soldering temperature (10 s)	SOLDERING		220 + 5	°C

Description

The ATA5275 is an integrated 1.5 A peak current BCDMOS antenna driver IC dedicated as a 125 kHz wake-up channel transmitter for TPM applications.

ATA5275 includes the full functionality to generate a magnetic LF field in conjunction with an antenna coil to transmit data and power to a receiver. The transmission can be controlled via a one wire I/O-interface by an external unit.The smart power IC is delivered in a QFN20 power package with heat slug.