FS6500 datasheet(67/153 Pages) NXP

67 / 153 page

NXP Semiconductors

FS6500-FS4500-ASILD

Safety power system basis chip with CAN FD and LIN transceivers

12.7.8 Power dissipation

The FS6500/FS4500 provides high performance SMPS and linear regulators to supply high end MCUs in

automotive applications. Each regulator can deliver:

• VPRE (6.5 V) up to 2.0 A

• VCORE (from 1.0 V to 5.0 V range) up to 2.2 A

• VCCA (3.3 V or 5.0 V) up to 100 mA (with internal MOS) or up to 300 mA (with external PNP)

• VAUX (3.3 V or 5.0 V) up to 400 mA (with external PNP)

• VCAN (5.0 V) up to 100 mA

A thermal dissipation analysis has to be performed based on the application use case to ensure the maximum

silicon junction temperature does not exceed 150 °C.

Two use cases covering the two main VCORE voltage configurations are provided in Figure 51.

• use case 1: VCORE = 3.3 V, ICORE = 0.7 A, VCCA with int. MOS

• use case 2: VCORE = 1.2 V, ICORE = 1.4 A, VCCA with ext. PNP

Both use cases have a total internal power dissipation below 0.9 W. A junction to ambient thermal resistivity

of 30 °C/W allows the application to work up to an ambient temperature of 125 °C. A good soldering of the

package expose pad is highly recommended to achieve such thermal performance.

aaa-037780

VSUP = 14 V and 25 % of CAN traffic

Regulator

Voltage

Current

Comment

Vpre

Vcore

Vcca

Vaux

6 V

3.3 V

5 V

670 mA

700 mA

50 mA

200 mA

int. MOS

Regulator

Voltage

Current

Comment

Vpre

Vcore

Vcca

Vaux

6 V

3.3 V

5 V

800 mA

1.4 A

200 mA

ext. PNP

use case 1: VCORE = 3.3 V, ICORE = 0.7 A, VCCA with int. MOS use case 2: VCORE = 1.2 V, ICORE = 1.4 A, VCCA with ext. PNP

1) CAN transceiver dissipation includes CAN_5V regulator dissipation.

2) 25 % CAN traffic means the CAN bus is dominant for 25 % of time and recessive for the remaining 75 %.

TOTAL PDIS =

0.765 W

TOTAL PDIS =

0.829 W

Vpre

25 %

Vcca

21 %

Vaux

5 %

Main contributors to the IC's Power dissipation

Vcore

33 %

Internal IC

8 %

CAN transceiver

8 %

Vcca

2 %

Vaux

5 %

CAN transceiver

7 %

Internal IC

7 %

Main contributors to the IC's Power dissipation

Vpre

28 %

Vcore

51 %

Figure 51. Power dissipation use case

FS6500-FS4500-ASILD

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

Product data sheet

Rev. 8 — 5 August 2024

Document feedback

67 / 153

FS6500 датащи(PDF) 67 Page - NXP Semiconductors

FS6500 датащи(HTML) 67 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL