MFS2401AVBA0ES datasheet(33/151 Pages) NXP

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NXP Semiconductors

FS2400

Fail-safe system basis chip with SMPS and LDO, CAN FD transceiver

14.1.2.3 Pseudo-random modulation

The pseudo-random triangular spread spectrum is activated in the M_SYS_CFG SPI register by setting the

MOD_EN bit high and the MOD_CONF bit high. In this configuration, the internal oscillator is modulated with a

triangular carrier frequency of 19 kHz with ±10 % deviation range of the nominal oscillator frequency, but two

random commutations on the carrier slope are added in each half period to increase the spectrum content.

aaa-051567

20 MHz + 10 %

20 MHz - 10 %

No modulation

(20 MHz)

Same slope as

triangular modulation

Pseudo random commutation

Figure 20. Pseudo-random modulation

14.1.3 Application schematic

aaa-046842

CBOOT_BUCK

C1_IN_BUCK

C1_OUT_BUCK

LV1_BUCK

V1_IN

V1 - HVBUCK

Figure 21. HVBUCK schematic with connection to V1_IN

14.1.4 Electrical characteristics

TA = –40 °C to 115 °C, unless otherwise specified. VBUCK + VHDR < V1_IN pin voltage < 36 V, unless otherwise specified. All voltages referenced to ground.

Symbol

Description

Min

Typ

Max

Unit

Static electrical characteristics

VBUCK_IN_STUP

Input voltage range during startup

4.6

VBUCK_IN

Input voltage range (after startup)

With VBOS = 5 V

(Vout+(Max(RLS_

BUCK)+Max(RDCR_

LBUCK))*IBUCK

)/0.905

VBUCK

Output voltage in :

• Normal mode using VV1_BUCK_OTP and VV1_BUCK_RANGE_

OTP OTP registers)

• Low-power on mode using VV1_LP_BUCK_OTP and VV1_

BUCK_RANGE_OTP OTP registers)

1.9

Table 13. Electrical characteristics

FS2400

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4 — 23 October 2024

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