ATA6823-PHQY datasheet, PDF - EEWORLD Datasheet

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ATA6823-PHQY: Descriptionmosfet and power driver IC gate driver IC; CategoryOther integrated circuit (IC) The signal circuit; File Size600KB，28 Pages; ManufacturerAtmel (Microchip); Environmental Compliance

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ATA6823-PHQY Overview

mosfet and power driver IC gate driver IC

ATA6823-PHQY Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Atmel (Microchip)
Parts packaging code	QFN
package instruction	HVQCCN, LCC32,.27SQ,25
Contacts	32
Reach Compliance Code	compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	BRUSH DC MOTOR CONTROLLER
JESD-30 code	S-XQCC-N32
length	7 mm
Number of functions	1
Number of terminals	32
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Encapsulate equivalent code	LCC32,.27SQ,25
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
power supply	7/18 V
Certification status	Not Qualified
Maximum seat height	1 mm
Maximum supply current (Isup)	7 mA
Maximum supply voltage (Vsup)	18 V
Minimum supply voltage (Vsup)	7 V
Nominal supply voltage (Vsup)	13.5 V
surface mount	YES
Temperature level	AUTOMOTIVE
Terminal form	NO LEAD
Terminal pitch	0.65 mm
Terminal location	QUAD
width	7 mm

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Features

•

PWM and Direction-controlled Driving of Four Externally-powered NMOS Transistors

•

A Programmable Dead Time Is Included to Avoid Peak Currents Within the H-bridge

•

Integrated Charge Pump to Provide Gate Voltages for High-side Drivers and to Supply

•

the Gate of the External Battery Reverse Protection NMOS

5V/3.3V Regulator and Current Limitation Function

Reset Derived From 5V/3.3V Regulator Output Voltage

Sleep Mode With Supply Current of Typically < 45µA, Wake-up by Signal on Pins EN2

or on LIN Interface

A Programmable Window Watchdog

Battery Overvoltage Protection and Battery Undervoltage Management

Overtemperature Warning and Protection (Shutdown)

LIN 2.1 Compliant

3.3V/5V Regulator with Trimmed Band Gap

QFN32 Package

H-bridge Motor

Driver

Atmel ATA6823

1. Description

The Atmel

ATA6823 is designed for automotive body and powertrain applications.

The IC is used to drive a continuous current motor in a full H-bridge configuration. An

external microcontroller controls the driving function of the IC by providing a PWM sig-

nal and a direction signal and allows the use of the IC in a motor-control application.

The PWM control is performed by the low-side switch; the high-side switch is perma-

nently on in the driving phase. The VMODE configuration pin can be set to 5V or 3.3V

mode (for regulator and interface high level). The window watchdog has a program-

mable time, programmable by choosing a certain value of the external watchdog

resistor RWD, internally trimmed to an accuracy of 10%. For communication a LIN

transceiver 2.1 is integrated.

4856J–AUTO–11/10

Atmel ATA6823

3. Functional Description

3.1

3.1.1

Power Supply Unit with Supervisor Functions

Power Supply

The IC is supplied by a reverse-protected battery voltage. To prevent it from destruction,

proper external protection circuitry has to be added. It is recommended to use at least a

capacitor combination of storage and HF caps behind the reverse protection circuitry and

closed to the VBAT pin of the IC (see

Figure 1-1 on page 2).

A fully-internal low-power and low-drop regulator, stabilized by an external blocking capacitor

provides the necessary low-voltage supply needed for the wake-up process. The low-power

band gap reference is trimmed and is used for the bigger VCC regulator, too. All internal

blocks are supplied by the internal regulator.

Note:

The internal supply voltage V

INT

must not be used for any other supply purpose!

Nothing inside the IC except the logic interface to the microcontroller is supplied by the

5V/3.3V VCC regulator.

A power-good comparator checks the output voltage of the V

INT

regulator and keeps the whole

chip in reset as long as the voltage is too low.

There is a high-voltage switch which brings out the battery voltage to the pin VBATSW for

measurement purposes. This switch is switched ON for VCC = HIGH and stays ON in case of

a watchdog reset going to sleep mode, VBATSW turns OFF. The signal can be used to switch

on external voltage regulators, etc.

3.1.2

Voltage Supervisor

This block is intended to protect the IC and the external power MOS transistors against over-

voltage on battery level and to manage undervoltage on it.

Function: in case of both overvoltage alarm (V

THOV

) and of undervoltage alarm (V

THUV

) the

external NMOS motor bridge transistors will be switched off. The failure state will be flagged

via DG2. No other actions will be carried out. The voltage supervision block is connected to

VBAT and filtered by a first-order low pass with a corner frequency of typical 15kHz.

3.1.3

Temperature Supervisor

There is a temperature sensor integrated on-chip to prevent the IC from overheating due to a

failure in the external circuitry and to protect the external NMOSFET transistors.

In case of detected overtemperature (150°C), the diagnostic pin DG3 will be switched to

“H”

signalize this event to the microcontroller. It should undertake actions to reduce the power dis-

sipation in the IC. In case of detected overtemperature (165°C), the V

regulator and all

drivers including the LIN transceiver will be switched OFF immediately and /RESET will go

LOW.

Both temperature thresholds are correlated. The absolute tolerance is ±10°C and there is a

built-in hysteresis of about 10°C to avoid fast oscillations. After cooling down below the 155°C

threshold; the IC will go into Active mode.

The LIN interface has a separate thermal shutdown with disabled the low-side driver at typi-

cally 165°C.

4856J–AUTO–11/10

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