L9960TR datasheet(29/95 Pages) STMICROELECTRONICS

29 / 95 page

DS11115 Rev 10

29/95

L9960, L9960T

Functional description

4.2.1

Power on reset (POR) electrical characteristics

Tj = -40 °C to 150 °C, VDD5 = 4.5 V to 5.5 V, Vps = 4 V to 28 V unless otherwise specified.

All voltages refer to GND. Currents are positive into and negative out of the specified pin.

4.3

System clock electrical characteristics

Tj = -40 °C to 150 °C, VDD5 = 4.5 V to 5.5 V, Vps = 4 V to 28 V unless otherwise specified.

All voltages refer to GND. Currents are positive into and negative out of the specified pin.

A Spread Spectrum function can be an optional solution to reach EMC performance. The effect

is a reduction on emission peak values by spreading the energy in the frequency domain.

Note:

(-) available in the R2 position in SPI answer frame 4.

A register report the echo of NSPREAD Config: "NSPREAD echo"

Note:

(-) available in the R2 position of the SPI answer frame 7b.

Table 26. POR electrical characteristics

Symbol

Parameter

Condition

Min.

Max.

Unit

Vpor

POR threshold

VDD5 decreasing

3.7

Vpor_hys

POR hysteresis

For VDD5 increasing, Bridge is switched

ON at VDD5_uv_off+VDD5_uv_hys or

(Vpor + Vpor_hys)

0.1

0.3

Tpor

POR filtering time

VDD5 decreasing

Analog filtering (guaranteed by design)

0.01

µs

Td_pow

Power-on delay time

DIR = PWM = NDIS = 1 / DIS = 0

(guaranteed by scan)

300

µs

Vpor_int

POR threshold on

internal regulator

-1

Table 27. System clock electrical characteristics

Symbol

Parameter

Condition

Min.

Typ Max. Unit

Fclock

Internal System clock

±10% accuracy

4.5

5.5

MHz

Table 28. NSPREAD

Bit status

Description

Condition

Spread Spectrum Activate

Reset value

Spread Spectrum Disable

Table 29. NSPREAD_echo

Bit status

Description

Condition

echo Spread Spectrum Activate

Default value

echo Spread Spectrum Disable

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