CS4525 datasheet(11/98 Pages) CIRRUS

11 / 98 page

DS726PP1

CS4525

LVD

VD Voltage Level Indicator (Input) - Identifies the voltage level attached to VD. When applying

5.0 V to VD, LVD must be connected to VD. When applying 2.5 V or 3.3 V to VD, LVD must be con-

nected to DGND.

DGND

Digital Ground (Input) - Ground for the internal logic and I/O.

VD_REG

Core Logic Power (Output) - Internally generated low voltage power supply for digital logic.

Digital Power (Input) - Positive power supply for the internal regulators and digital I/O.

VA_REG

Analog Power (Output) - Internally generated positive power for the analog section and I/O.

AGND

Analog Ground (Input) - Ground reference for the internal analog section and I/O.

FILT+

Positive Voltage Reference (Output) - Positive reference voltage for the internal ADC sampling

circuits.

Common Mode Voltage (Output) - Filter connection for internal common mode voltage.

AFILTL

AFILTR

Antialias Filter Connection (Output) - Antialias filter connection for ADC inputs.

AINL

AINR

Analog Input (Input) - The full-scale input level is specified in the ADC Analog Characteristics

specification table.

OCREF

Over Current Reference Setting (Input) - Sets the reference for over current detection.

PGND

22,23

27,28

33,34

37,38

Power Ground (Input) - Ground for the individual output power half-bridge devices.

RAMP_CAP

Output Ramp Capacitor (Input) - This pin should be connected directly to VP in hardware mode.

25,30,

31,36

High Voltage Power (Input) - High voltage power supply for the individual half-bridge devices.

OUT4

OUT3

OUT2

OUT1

PWM Output (Output) - Amplified PWM power outputs.

TSTO

Test Output (Output) - These pins are outputs used for the Logic Level PWM switching signals

available only in software mode. They must be left unconnected for hardware mode operation.

TWR

Thermal Warning Output (Output) - Thermal warning output.

ERRUVTE

Thermal and Undervoltage Error Output (Output) - Error flag for thermal shutdown and under-

voltage.

ERROC

Overcurrent Error Output (Output) - Overcurrent error flag.

EN_TFB

Enable Thermal Feedback (Input) - Enables the thermal foldback feature when high.

I2S/LJ

I²S/Left Justified (Input) - Selects between I²S and Left-Justified data format for the serial input

port. Selects I²S when high and LJ when low.

SYS_CLK

System Clock (Input/Output) -Clock source for the delta-sigma modulators.

TSTO

Test Output (Output) - This pin is an output used for the crystal oscillator driver available only in

software mode. It must be left unconnected for normal hardware mode operation.

TSTI

Test Input (Input) - This pin is an input used for the crystal oscillator driver available only in soft-

ware mode. It must be tied to digital ground for normal hardware mode operation.

Thermal Pad

Thermal Pad - Thermal relief pad for optimized heat dissipation. See “QFN Thermal Pad” on

page 65 for more information.

CS4525 数据表(PDF) 11 Page - Cirrus Logic

CS4525 数据表(HTML) 11 Page - Cirrus Logic

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