Datasheet

TPS23753
SLVS853C –JUNE 2008–REVISED JANUARY 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise noted: CS = APD = CTL = RTN, GATE open, R
FRS
= 60.4 kΩ, R
BLNK
= 249 kΩ, C
VB
= C
VC
= 0.1 μF,
R
DEN
= 24.9 kΩ, R
CLS
open, V
VDD-VSS
= 48 V, V
VDD1-RTN
= 48 V, 8.5 V ≤ V
VC-RTN
≤ 18 V, –40°C ≤ T
J
≤ 125°C
Controller Section Only
[V
SS
= RTN and V
DD
= V
DD1
] or [V
SS
= RTN = V
DD
], all voltages referred to RTN. Typical specifications are at 25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CS
V
CSMAX
Maximum threshold voltage V
CTL
= V
B
, V
CS
↑ until GATE duty cycle drops 0.50 0.55 0.60 V
t
1
Turn off delay V
CS
= 0.65 V 25 41 60 ns
V
SLOPE
Internal slope compensation voltage Peak voltage at maximum duty cycle, referred to CS 90 118 142 mV
I
SL_EX
Peak slope compensation current V
CTL
= V
B
, I
CS
at maximum duty cycle (ac component) 30 42 54 μA
Bias current (sourcing) Gate high, dc component of CS current 2 3 4.2 μA
GATE
Source current V
CTL
= V
B
, V
C
= 12 V, GATE high, Pulsed measurement 0.30 0.46 0.60 A
Sink current V
CTL
= V
B
, V
C
= 12 V, GATE low, Pulsed measurement 0.50 0.79 1.1 A
APD
V
APDEN
V
APD
↑ 1.42 1.5 1.58
Threshold voltage V
V
APDH
Hysteresis
(2)
0.28 0.3 0.32
THERMAL SHUTDOWN
Turn off temperature 135 145 155 °C
Hysteresis
(3)
20 °C
(2) The hysteresis tolerance tracks the rising threshold for a given device.
(3) These parameters are provided for reference only, and do not constitute part of TI's published device specifications for purposes of TI's
product warranty.
ELECTRICAL CHARACTERISTICS
PoE and Control
[V
DD
= V
DD1
] or [V
DD1
] = RTN, V
VC-RTN
= 0 V, all voltages referred to V
SS
. Typical specifications are at 25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DEN (DETECTION) (V
DD
= V
DD1
= RTN = V
SUPPLY
positive)
Measure I
SUPPLY
Detection current V
DD
= 1.6 V 62 64.3 66.5 μA
V
DD
= 10 V 399 406 413
Detection bias current V
DD
= 10 V, DEN open, Measure I
SUPPLY
5.2 12 μA
V
PD_DIS
Hotswap disable threshold 3 4 5 V
I
lkg
DEN leakage current V
DEN
= V
DD
= 57 V, Float V
DD1
and RTN, Measure I
DEN
0.1 5 μA
CLS (CLASSIFICATION) (V
DD
= V
DD1
= RTN = V
SUPPLY
positive)
13 V ≤ V
DD
≤ 21 V, Measure I
SUPPLY
R
CLS
= 1270 Ω 1.8 2.14 2.4
R
CLS
= 243 Ω 9.9 10.6 11.3
I
CLS
Classification current mA
R
CLS
= 137 Ω 17.6 18.6 19.4
R
CLS
= 90.9 Ω 26.5 27.9 29.3
R
CLS
= 63.4 Ω 38 39.9 42
V
CL_ON
Regulator turns on, V
DD
rising 10 11.7 13
Classification regulator lower
V
threshold
V
CL_HYS
Hysteresis
(1)
1.9 2.05 2.2
V
CU_OFF
Regulator turns off, V
DD
rising 21 22 23
Classification regulator upper
V
threshold
V
CU_HYS
Hysteresis
(1)
0.5 0.77 1
I
lkg
Leakage current V
DD
= 57 V, V
CLS
= 0 V, DEN = V
SS
, Measure I
CLS
1 μA
(1) The hysteresis tolerance tracks the rising threshold for a given device.
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