FS6500 datasheet(68/153 Pages) NXP

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NXP Semiconductors

FS6500-FS4500-ASILD

Safety power system basis chip with CAN FD and LIN transceivers

The main contributors to the device power dissipation are the VPRE, VCORE, and VCCA (when used with

an internal PMOS) regulators. In comparison, the power dissipation from the Internal IC, VAUX, and CAN

transceiver are negligible. VPRE power dissipation is mainly induced by the loading of the regulators it is

supplying, mainly VCORE, VCCA, and VAUX which are application dependent. The total device power dissipation,

depending on the variation of these three regulators, is detailed in Figure 52 with the environmental conditions

in the associated table.

3.3 V

6.5 V

0.7 A

3.3 V and 5 V

ICORE + ICCA

+ IAUX + ICAN

6.5 V

3.3 V and 1.2 V

from 0.25 to 1.5 A

ICORE + ICCA

+ IAUX + ICAN

Pdis vs. ICCA

3.3 V

6.5 V

from 0.5 to 2A

0.3 A

3.3 V

Pdis vs. IPRE

Pdis vs. ICORE

IPRE (A)

0.4

2.0

1.6

0.8

1.2

Power dissipation vs. Ipre

0.6

1.0

1.4

Power

dissipation

(W)

0.2

Power dissipation vs. Icore

0.4

0.8

1.2

ICCA (A)

0.01

0.03

0.05

0.07

0.09

0.11

1.1

aaa-037781

Power

dissipation

(W)

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

ICORE (A)

0.2

0.6

1.0

1.4

0.4

0.8

1.2

1.6

1.4

Power

dissipation

(W)

0.2

Power dissipation vs. Icca

0.4

0.6

0.8

1.0

1.2

50 mA

20 to 100 mA

50 mA

3.3 V

200 mA

5 V

33 mA

VCORE

VPRE

IPRE

ICORE

VCCA

ICCA

VAUX

IAUX

CAN_5 V

ICAN

VSUP = 14 V, VCORE = 3.3 V

VSUP = 18 V, VCORE = 3.3 V

VSUP = 14 V, VCORE = 1.2 V

VSUP = 18 V, VCORE = 1.2 V

VSUP = 14 V

VSUP = 18 V

VSUP = 14 V, VCCA = 5 V

VSUP = 18 V, VCCA = 5 V

VSUP = 14 V, VCCA = 3.3 V

VSUP = 18 V, VCCA = 3.3 V

Figure 52. Power dissipation versus ICORE, ICCA, or IPRE

12.7.9 Start-up sequence

To provide a safe and well known start-up sequence, the FS6500/FS4500 includes an undervoltage lockout.

This VSUP_UV_5 undervoltage lockout applies when the device is under a power-on reset condition or released

from LPOFF. All the different voltage rails start automatically as described in Figure 53.

FS6500-FS4500-ASILD

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

Product data sheet

Rev. 8 — 5 August 2024

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