VNF1048F datasheet(3/49 Pages) STMICROELECTRONICS

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Table 1. Pin functions

Pin #

Name

Function

TAB

GND

TAB connection must be to ground. TAB is not intended as device reference ground (dedicated pin shall

be used).

VSPI

DC supply input for the SPI interface. 3.3 V and 5 V compatible.

CSN

Chip select not (active low) for SPI communication. It is the selection pin of the device. CMOS compatible

input.

SDI

Serial data input for SPI communication. Data is transferred serially into the device on the SCK rising

edge.

SDO

Serial data output for SPI communication. Data is transferred serially out of the device on the SCK falling

edge.

SCK

Serial clock for SPI communication. It is a CMOS compatible input.

DIAG

Open-drain logic output. Diagnostic feedback. DIAG = '0' if (SR1.WAKEUPM = '1') or (GSB.DIAGS = '1') or

(GSB.DE = '1') else '1'

TEST1

Test mode pin 1- must be connected to the ground.

TEST2

Test mode pin 2- must be connected to the ground.

Not connected pin.

HWLO

Active high input pin compatible with 3.3 V and 5 V CMOS; it causes transitions to states where the

registers are locked from writing.

Not connected pin.

V3V3

Output of the 3.3 V internal LDO voltage regulator (logic and I/O supply).

Connect a low ESR capacitor (1 μF) close to this pin.

GND

Ground connection.

14-17

Not connected pin.

NTC_M

Negative input pin for external NTC resistor.

NTC

Positive input pin for external NTC resistor.

ISNS_N

Current sense amplifier negative input.

ISNS_P

Current sense amplifier positive input.

Not connected pin.

OUT

External FET source connection.

HS_GATE Output of the gate driver for the external FET.

Input supply pin. Connect to the 12 V, 24 V, 48 V battery voltage.

Not connected pin.

Charge pump output.

CP2P

Charge pump–Positive terminal of the flying capacitor CP2.

CP2M

Charge pump–Negative terminal of the flying capacitor CP2.

CP1P

Charge pump–Positive terminal of the flying capacitor CP1.

CP1M

Charge pump–Negative terminal of the flying capacitor CP1.

Not connected pin.

VNF1048F

Block diagram and pin description

DS13084 - Rev 8

page 3/49

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