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FS6500 Datasheet(PDF) 60 Page - NXP Semiconductors

Part # FS6500
Description  Safety power system basis chip with CAN FD and LIN transceivers
PDF  153 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

FS6500 Datasheet(HTML) 60 Page - NXP Semiconductors

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NXP Semiconductors
FS6500-FS4500-ASILD
Safety power system basis chip with CAN FD and LIN transceivers
aaa-037772
EXT. DEVICES
Converter
RDS(on)
CG
VPRE
tSW_ON
tSW_OFF
Overdrive
VDIODE
600 pF
30 ns
30 ns
10 V
22 µH
57 µF
100 mΩ
60 mΩ
200 mΩ
0.35 V
ESR
COUT_VPRE
COUT_VPRE
L coil
Freq
DCR coil
MOSFET switch
440 kHz
6.50 V
VPRE efficency vs. IPRE
IPRE current (A)
0
2.4
1.6
0.8
2.0
1.2
0.4
88
92
84
96
100
VPRE
efficiency
(%)
80
Figure 43. VPRE efficiency
12.7.2 VCORE voltage regulator
This voltage regulator is a step-down DC–DC converter in the FS6500 series and a linear regulator in the
FS4500 series.
12.7.2.1 VCORE DC–DC converter
The FS6500 voltage regulator is a step-down DC–DC converter operating in voltage control mode. The high-
side switching MOSFET, connected to VPRE, is integrated in the device, and the PWM frequency is fixed
at 2.4 MHz typical. The output voltage is configurable from a 1.0 V to 5.0 V range, and adjustable around
these voltages with an external resistor divider (R3/R4) connected between VCORE and the feedback pin
(FB_CORE) (Figure 44). VCORE = VCORE_FB x ((R3 + R4)/R4).
The voltage accuracy is ±2.0 % (without the external resistor bridge R3/R4 accuracy) and the max output
current is 2.2 A. The stability of the overall converter is done by an external compensation network (R1/C1/R2/
C2) connected to the pin COMP_CORE. It is recommended to use 1.0 % accuracy resistors and set R4 = 8.06
kΩ and adjust R3 to obtain the final VCORE voltage needed for the MCU core supply.
FS6500-FS4500-ASILD
All information provided in this document is subject to legal disclaimers.
© 2024 NXP B.V. All rights reserved.
Product data sheet
Rev. 8 — 5 August 2024
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