參數(shù)資料
型號: TPS23770PWPRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 1.3 A SWITCHING CONTROLLER, 565 kHz SWITCHING FREQ-MAX, PDSO20
封裝: GREEN, PLASTIC, HTSSOP-20
文件頁數(shù): 6/38頁
文件大?。?/td> 1036K
代理商: TPS23770PWPRG4
www.ti.com
48.50
49.50
48.75
49.00
49.25
MaxDutyCycle-%
0
100
200
300
400
500
600
OscillatorFrequency-kHz
T =125 C
J
o
T =-40 C
J
o
T =25 C
J
o
3
0
4
2
1
5
6
Current-
A
m
T =25 C
J
o
T =-40 C
J
o
T =125 C
J
o
0
2
4
6
8
10
12
V
-SupplyVoltage-V
DD
DuringPoEDetection
432
434
436
438
440
442
444
446
448
450
452
I
-mA
R
TN
-40
-20
0
20
40
60
80
100 120 140
T
-JunctionTemperature- C
J
o
40
90
50
100
60
110
120
130
70
80
BlankingT
ime-ns
-40
-20
0
20
40
60
80
100 120 140
T
-JunctionTemperature- C
J
o
BL =VBIAS
BL =RTN
50
55
70
75
60
65
ResponseT
ime-ns
-40
-20
0
20
40
60
80
100 120 140
T
-JunctionTemperature- C
J
o
0
500
100
600
200
700
300
400
OscillatorFrequency-kHz
0
100
200
300
400
500
600
700
15000/R
-kHz
FREQ
17.5
30.0
20.0
22.5
25.0
27.5
PDDetectionResistance-k
W
1
2
3
4
8
5
9
6
10
7
11
Voltage,V
-V
PI
Includes24.9k
andHD01Bridge
W
R(V )=
PI
1
(I(V )-I(V )-1))
PI
802.3afLimits
0.6
0.7
1.0
0.8
1.1
0.9
1.2
1.3
1.4
1.5
1.6
Current-mA
-40
-20
0
20
40
60
80
100 120 140
T
-JunctionTemperature- C
J
o
Operating
R
=30k
(FREQ)
W
Operating
R
=150k
(FREQ)
W
Quiescent
SLVS590B – JULY 2005 – REVISED FEBRUARY 2008
TYPICAL CHARACTERISTICS (continued)
(VDD + RTN + SENP) DETECTION
CURRENT
PoE CURRENT LIMIT
MAXIMUM DUTY CYCLE
vs
SUPPLY VOLTAGE
JUNCTION TEMPERATURE
OSCILLATOR FREQUENCY
Figure 21.
Figure 22.
Figure 23.
CONVERTER CURRENT LIMIT
RESPONSE TIME
BLANKING TIME
OSCILLATOR FREQUENCY
vs
JUNCTION TEMPERATURE
15000/RFREQ
Figure 24.
Figure 25.
Figure 26.
PD DETECTION RESISTANCE
OPERATING CURRENT ( IVDD)
vs
VOLTAGE, VPI
JUNCTION TEMPERATURE
Figure 27.
Figure 28.
14
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS23750 TPS23770
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