Datasheet

www.ti.com
ELECTRICAL CHARACTERISTICS
TPS23841
SLUS745A – NOVEMBER 2006 – REVISED MAY 2007
V48 = 48 V, R
T
= 124 k Ω , C
T
= 220 pF, C
INT
= 0.027 µ F (low leakage), –40 ° C to 125 ° C and T
A
= T
J
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Power Supply
V48 quiescent current Off mode (all ports) 4 9 12
mA
V48 quiescent current Powered mode (all ports) 10 14
V10, internal analog supply I
LOAD
= 0 9.75 10.5 11.5
V
V3.3, internal digital supply I
LOAD
= 0 to 3 mA 3 3.3 3.7
V3.3 short circuit current V = 0 3 12 mA
V6.3, internal supply I
LOAD
= 0 5 6.3 7
V2.5, internal reference supply I
LOAD
= 0 2.46 2.5 2.54
V
UVLO_R
, V48 UVLO Input voltage rising 16.0 21.5 V
V
UVLO_F
, V48 UVLO Input voltage falling 14 21
V
HYSUV
, UVLO hysteresis 0.2 1.0 2.0
Internal POR time out(I
2
C) After all supplies are good I
2
C activity is valid 8
Clock
Internal POR time out (Port) After all supplies are good Port active to I
2
C 66000
Pulses
commands
Port Discovery
Port off #P to #N input resistance 400 600 k Ω
Discovery open circuit voltage 22 30
Discovery 1 voltage loop control 70 µ A < I
PORT
< 3 mA 2.8 4.4 V
Discovery 2 voltage loop control 70 µ A < I
PORT
< 3 mA 8.8 10
Discovery current limit P = N = 48 V 3 4 5 mA
Auto-mode discovery resistance 19 26.5
acceptance Band
Auto-mode discovery resistance low 0 15
k Ω
end rejection
Auto-mode discovery resistance high 33
end rejection
Discovery1,2 A/D conversion scale 100 µ A < I
PORT
< 3 mA 5.30 6.10 6.75 count/ µ A
factor
Discovery1,2 A/D conversion time I
PORT
= 120 µ A ms
Port Classification
Classification voltage loop control 100 µ A < I
PORT
< 50 mA 15 17.5 20 V
Classification current limit P = N = 48 V 50 60 100
Class 0 to 1 detection threshold 5.5 6.5 7.5
Class 1 to 2 detection threshold 13 14.5 16
mA
Class 2 to 3 detection threshold 21 23 25
Class 3 to 4 detection threshold 31 33 35
Class 4 to 0 detection threshold 45 48 51
Classification A/D conversion scale 375 424 475 Count/m
factor A
Classification A/D conversion time I
PORT
= 50 mA 18 22 ms
4
Submit Documentation Feedback