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參數(shù)資料
| 型號(hào)： | LTC4259AIGW-1#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, SSOP-36 |
| 文件頁(yè)數(shù)： | 23/32頁(yè) |
| 文件大?。?/td> | 416K |
| 代理商： | LTC4259AIGW-1#TRPBF |
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LTC4259A-1
3
4259a1fa
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. AGND = DGND = 0V, VDD = 3.3V, VEE = –48V unless otherwise noted
(Note 6).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ITCLASS
Classification Threshold Current
Class 0-1
●
5.5
6.5
7.5
mA
Class 1-2
●
13
14.5
16
mA
Class 2-3
●
21
23
25
mA
Class 3-4
●
31
33
35
mA
Class 4-Overcurrent
●
45
48
51
mA
Gate Driver
IGON
GATE Pin Current
Gate On, VGATEn = VEE
●
–20
–50
–70
A
IGOFF
GATE Pin Current
Gate Off, VGATEn = VEE + 5V
●
30
300
A
IGPD
GATE Pin Short-Circuit Pull-Down
VGATEn = VEE + 1V
50
mA
VGATE
External Gate Voltage (VGATEn – VEE)IGATEn = – 1A (Note 3)
●
10
13
15
V
Output Voltage Sense
VPG
Power Good Threshold Voltage
VOUTn – VEE
●
123
V
IVOUT
Out Pin Bias Current
0V > VOUTn > –10V
●
–6
A
–10V > VOUTn > –30V
●
–18
A
VOUTn = –48V
–20
A
Current Sense
VCUT
Overcurrent Detection Sense Voltage
VSENSEn – VEE, VOUTn = VEE (Note 9)
166
187.5
199
mV
VLIM
Current Limit Sense Voltage
VSENSEn – VEE, VOUTn = VEE
201
212.5
224
mV
VSENSEn – VEE, VOUTn = AGND – 30V
201
224
mV
VSENSEn – VEE, VOUTn = AGND – 10V
30.2
mV
VMIN
DC Disconnect Sense Voltage
VSENSEn – VEE
2.52
3.75
4.97
mV
VSC
Short-Circuit Sense Voltage
275
mV
ISENSE
SENSE Pin Bias Current
VSENSEn = VEE
–50
A
AC Disconnect (Note 10)
ROSCIN
Input Impedance of OSCIN Pin
0.1V < VOSCIN < 3V, fOSCIN < 200Hz
●
200
500
k
AVACD
Voltage Gain OSCIN to DETECT1, 2
Port Powered, PD Not Present
●
–2.7
–3
–3.3
V/V
Voltage Gain OSCIN to DETECT3, 4
Port Powered, PD Not Present
●
2.7
3
3.3
V/V
IACDMAX
AC Disconnect DETECT
n Output Current
Port Powered, –6V < VDETECTn < 0V
●
±600
A
IACDMIN
Remain Connected DETECT Pin Current
Port Powered, VDETECTn = –3.4V (C grade)
●
190
230
260
A
(I grade)
●
180
230
260
Digital Interface
VOLD
Digital Output Low Voltage
ISDAOUT = 3mA, IINT = 3mA
●
0.4
V
ISDAOUT = 5mA, IINT = 5mA
●
0.7
V
VILD
Digital Input Low Voltage
SCL, SDAIN, RESET, SHDN
n, AUTO, ADn
●
0.8
V
VIHD
Digital Input High Voltage
SCL, SDAIN, RESET, SHDN
n, AUTO, ADn
●
2.4
V
RPU
Pull-Up Resistor to VDD
AD
n, RESET, SHDNn
50
k
RPD
Pull-Down Resistor to DGND
AUTO
50
k
AC Characteristics
tDETDLY
Detection Delay
From Detect Command or Application of PD to Port
●
170
590
ms
to Detect Complete
tDET
Detection Duration
Time to Measure PD Signature Resistance (Figure 2)
●
170
230
ms
tCLSDLY
Classification Delay
From Successful Detect in Auto or Semiauto Mode
●
10.1
52
ms
to Class Complete
From Classify Command in Manual Mode (Figure 2)
●
10.1
420
ms
tCLASS
Classification Duration
(Figure 2)
●
10.1
13
ms
tPON
Power On Delay, Auto Mode
From Valid Detect to Port On in Auto Mode (Figure 2)
●
130
ms
From Port On Command to GATE Pin Current = IGON
●
1ms
(Note 10)
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