PXE1110C

PDS-PXE1-PXM1-C-001A

9

Pin #

Name

I/O

Type

Description

35

ATSEN

I

Analog

Loop_A external temperature sense input. If the digital controllers

’ internal

temperature sensor is selected and/or the external temperature reporting

is not required, the ATSEN pin may be left open (floating).

36

XADDR1

I

Analog

Used in conjunction with XADDR2, the I2C address of the controller is set

by tying an external resistor between this pin and GND.

37

VINSEN

I

Analog

VIN (+12V) voltage sense input. The VINSEN pin may be connected to

the +12V supply through a resistor divider, or to the PI sense network and

is used to guarantee a valid input voltage before starting up (input under-

voltage lockout). Refer to the Power Input Sense section herein for details.

If unused, this pin may be grounded.

38

IINSEN

I

Analog

Current sense input used for PWR_IN calculation. An external amplifier or

the PI sense network may be used to translate current information from a

precision sense resistor to an input signal for the controller. Refer to the

Power Input Sense section herein for details. If unused, this pin may be

grounded.

39

VDD

S

supply

3.3V power supply input to the digital controller. This pin should be

connected to the system +3.3V supply and decoupled using high quality

1.0μF + 0.1μF ceramic capacitors.

40

VD12

S

Internal

Supply

Do not apply voltage to or ground this pin. Internally generated 1.2V

voltage reference used to power digital core logic. The pin is provided for

attaching external decoupling capacitors only. Decouple using high quality

1.0μF + 0.1μF ceramic capacitors. This pin is not intended to be used to

drive external components as +1.2V reference.

Die Paddle

S

Ground

Exposed Ground pad beneath the device must be soldered to the PCB

ground for proper operation.