VEE
參數(shù)資料
型號(hào): LTC4259ACGW
廠商: Linear Technology
文件頁(yè)數(shù): 28/32頁(yè)
文件大小: 0K
描述: IC CTRLR POE QUAD AC DISC 36SSOP
標(biāo)準(zhǔn)包裝: 32
控制器類型: 以太網(wǎng)供電控制器(POE)
接口: I²C
電源電壓: 3 V ~ 4 V
電流 - 電源: 2.5mA
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 36-BSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 36-SSOP
包裝: 管件
LTC4259A
5
4259afb
TYPICAL PERFOR A CE CHARACTERISTICS
UW
50ms/DIV
4259 G01
GND
PORT
VOLTAGE
10V/DIV
VEE
PORT 1
VDD = 3.3V
VEE = –48V
DETECTION
PHASE 1
CLASSIFICATION
POWER ON
DETECTION
PHASE 2
5ms/DIV
4259 G02
GND
PORT
VOLTAGE
20V/DIV
GATE
VOLTAGE
10V/DIV
PORT
CURRENT
500mA/DIV
VEE
+14V
VDD = 3.3V
VEE = –48V
0mA
FOLDBACK
425mA
CURRENT LIMIT
FET ON
LOAD
FULLY
CHARGED
V
SENSE
n(mV)
225
200
175
150
125
100
75
50
25
0
450
400
350
300
250
200
150
100
50
0
VOUTn-AGND (V)
–48
0
4259 G03
–40
–24
–32
–16
–8
ILIMIT
WITH
R
SENSE
=
0.5
(mA)
VDD = 3.3V
VEE = –48V
TA = 25°C
LOAD CURRENT (mA)
0
PULL-DOWN
VOLTAGE
(V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
20
4259 G04
5
10
15
25
VDD = 3.3V
TA = 25°C
50
s/DIV
4258 G05
PORT
VOLTAGE
1V/DIV
PORT
CURRENT
20mA/DIV
VDD = 3.3V
VEE = –48V
TA = 25°C
0mA
–18V
40mA
CLASSIFICATION CURRENT (mA)
0
–2
–4
–6
–8
–10
–12
–14
–16
–18
–20
CLASSIFICATION
VOLTAGE
(V)
4258 G06
0
102030
405060
70
DETECT
n
PIN VOLTAGE
PORT VOLTAGE WITH
TYPICAL CMPD3003
VDD = 3.3V
VEE = –48V
TA = 25°C
VEE SUPPLY VOLTAGE (V)
–70
SUPPLY
CURRENT
(mA)
3.0
2.5
2.0
1.5
1.0
0.5
0
–40
–20
4258 G07
–60
–50
–30
–10
0
VDD = 3.3V
REG 12h = 00h
Power On Sequence in Auto Mode
Current Limit Foldback
Powering On a 180
F Load
INT and SDAOUT Pull Down
Voltage vs Load Current
Classification Transient Response
to 40mA Load Step
Classification Current Compliance
VEE DC Supply Current vs
Supply Voltage
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