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TPS23753A Datasheet(PDF) 3 Page - Texas Instruments

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No. de pieza TPS23753A
Descripción Electrónicos  IEEE 802.3 PoE INTERFACE AND CONVERTER CONTROLLER WITH ENHANCED ESD IMMUNITY
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Fabricante Electrónico  TI1 [Texas Instruments]
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TPS23753A Datasheet(HTML) 3 Page - Texas Instruments

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TPS23753A
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SLVS933B – JULY 2009 – REVISED JANUARY 2010
RECOMMENDED OPERATING CONDITIONS
Voltage with respect to VSS (unless otherwise noted)
MIN
NOM
MAX
UNIT
Input voltage range, VDD, VDD1, RTN
0
57
V
Input voltage range, VC to RTN
0
18
V
VI
Input voltage range, APD, CTL to RTN
0
VB
V
Input voltage range, CS to RTN
0
2
V
RTN current (TJ ≤ 125°C)
350
mA
VB sourcing current
0
2.5
5
mA
VB capacitance
0.08
0..1
mF
RBLNK
0
350
k
Synchronization pulse width input (when used)
25
ns
TJ
Operating junction temperature range
–40
125
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise noted: CS = APD = CTL = RTN, GATE open, RFRS = 60.4 kΩ, RBLNK = 249 kΩ, CVB = CVC = 0.1 mF, RDEN =
24.9 k
Ω, RCLS open, VVDD-VSS = 48 V, VVDD1-RTN = 48 V, 8.5 V ≤ VVC-RTN ≤ 18 V, –40°C ≤ TJ ≤ 125°C
Controller Section Only
[VSS = RTN and VDD = VDD1] or [VSS = RTN = VDD], all voltages referred to RTN. Typical specifications are at 25°C.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VC
UVLO_1
VC rising
8.65
9
9.3
Undervoltage lockout
V
UVLO_H
Hysteresis(1)
3.3
3.5
3.7
Operating current
VC = 12 V, CTL = VB
0.40
0.58
0.85
mA
VDD1 = 10.2 V, VVC(0) = 0 V
50
85
175
tST
Startup time, CVC = 22 mF
ms
VDD1 = 35 V, VVC(0) = 0 V
30
48
85
VDD1 = 10.2 V, VVC = 8.6 V
0.44
1.06
1.80
Startup current source - IVC
mA
VDD1 = 48 V, VVC = 0 V
2.5
4.3
6.0
VB
Voltage
6.5 V
≤ VC ≤ 18 V, 0 ≤ IVB ≤ 5 mA
4.75
5.10
5.25
V
FRS
CTL= VB, Measure GATE
Switching frequency
223
248
273
kHz
RFRS = 60.4 kΩ
78.5
DMAX
Duty cycle
CTL= VB, Measure GATE
76%
81%
%
VSYNC
Synchronization
Input threshold
2
2.2
2.4
V
CTL
VZDC
0% duty cycle threshold
VCTL ↓ until GATE stops
1.3
1.5
1.7
V
Softstart period
Interval from switching start to VCSMAX
400
800
ms
Input resistance
70
100
145
k
BLNK
In addition to t1
Blanking delay
BLNK = RTN
35
52
75
ns
RBLNK = 49.9 kΩ
41
52
63
CS
VCSMAX
Maximum threshold voltage
VCTL = VB, VCS ↑ until GATE duty cycle drops
0.50
0.55
0.60
V
t1
Turn off delay
VCS = 0.65 V
25
41
60
ns
VSLOPE
Internal slope compensation voltage
Peak voltage at maximum duty cycle, referred to CS
90
118
142
mV
ISL_EX
Peak slope compensation current
VCTL = VB, ICS at maximum duty cycle (ac component)
30
42
54
mA
Bias current (sourcing)
Gate high, dc component of CS current
2
3
4.2
mA
(1)
The hysteresis tolerance tracks the rising threshold for a given device.
Copyright © 2009–2010, Texas Instruments Incorporated
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