L9963E datasheet(167/184 Pages) STMICROELECTRONICS

167 / 184 page

Table 87. Additional components for hotplug protection

Components Value Unit

Max.

tolerance

Rating

Comments

RHOT

Ω

10%

1 W

Limits the inrush current flowing through the centralized clamp upon

hotplug

MHOT

100 V

The PMN280ENEAX is the recommended component to sustain hotplug

energy in centralized BMS with very high voltage battery packs. It features

100 V breakdown voltage, so it won’t be damaged during hotplug. Its

RDS_ON is 12.5 mΩ, thus guaranteeing a very low impedance path on the

GND line, once in normal operation

60 V

The STN4NF06L is the recommended component to sustain hotplug

energy in distributed BMS. It features 60 V breakdown voltage, so it won’t

be damaged during hotplug. Its RDS_ON is 21 mΩ, thus guaranteeing a

very low impedance path on the GND line, once in normal operation

CGS

4.7

10%

16 V

Filters any VDS spike coupled to the gate during hotplug via the MHOT

parasitic Miller capacitance. Along with RG, adds a delay in MHOT turn on

path, thus keeping the transistor safely OFF during hotplug.

RPD

100

kΩ

10%

1/10 W

Keeps MHOT safely OFF when L9963E power is removed. It only drains

50 uA from VTREF during normal operation

kΩ

10%

1/10 W Limits the VTREF inrush current when turning ON MHOT

L9963E

Hotplug

DS13636 - Rev 12

page 167/184

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