TPS2398, TPS2399
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4
Table 5. ELECTRICAL CHARACTERISTICS
V
I(−VIN)
= −48 V with respect to RTN, V
I(EN)
= 2.8 V, V
I(ISENS)
= 0 V, all outputs unloaded, device not in fault mode, T
J
= 25°C; unless
otherwise noted. The Min and Max specifications are guaranteed at −40°C ≤ T
J
≤ 85°C. (Notes 5, 6)
Parameter UnitMaxTypMinSymbolTest Conditions
LINEAR CURRENT AMPLIFIER (LCA)
Reference clamp voltage
V
O(IRAMP)
= open V
REF_K
33 40 46 mV
Input offset voltage V
O(IRAMP)
= 2 V V
IO
−7 6 mV
RAMP GENERATOR
IRAMP source current, slow turn−on rate
V
O(IRAMP)
= 0.25 V I
SRC1
−850 −600 −400 nA
IRAMP source current, normal rate V
O(IRAMP)
= 1 V, 3 V I
SRC2
−11 −10 −9
mA
Low−level output voltage V
I(EN)
= 0 V V
OL
5 mV
Voltage gain, relative to ISENS V
O(IRAMP)
= 1 V, 3 V A
V
9.5 10 10.5 mV/V
OVERLOAD COMPARATOR
Current overload threshold, ISENS
V
TH_OL
80 100 120 mV
Glitch filter delay time V
I(ISENS)
= 200 mV t
DLY
2 4 7
ms
FAULT TIMER
Low−level output voltage
V
I(EN)
= 0 V V
OL
5 mV
Charging current, current limit mode V
I(ISENS)
= 80 mV, V
O(FLTTIME)
= 2 V I
CHG
−55 −50 −45
mA
Fault threshold voltage V
FLT
3.75 4.0 4.25 V
Discharge current, retry mode (TPS2399) V
I(ISENS)
= 80 mV, V
O(FLTTIME)
= 2 V, Fault Mode I
DSG
0.38 0.75
mA
Output duty cycle (TPS2399) D 0.8 1.5 %
Discharge current, timer reset mode V
O(FLTTIME)
= 2 V I
RST
1 mA
PG OUTPUT
High−level output (leakage) current
V
I(EN)
= 0 V, V
O(PG)
= 65 V I
OH
10
mA
Driver ON resistance I
O(PG)
= 1 mA R
DS(ON)
35 80
W
5. All voltages are with respect to the −VIN terminal unless otherwise stated.
6. Currents are positive into and negative out of the specified terminal.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
