LTC4269CDKD-1#PBF Linear Technology, LTC4269CDKD-1#PBF Datasheet - Page 4

IC PD/OPTO FLYBACK CTRLR 32-DFN

LTC4269CDKD-1#PBF

Manufacturer Part Number
LTC4269CDKD-1#PBF
Description
IC PD/OPTO FLYBACK CTRLR 32-DFN
Manufacturer
Linear Technology
Type
Power Over Ethernet (PoE)r
Datasheet

Specifications of LTC4269CDKD-1#PBF

Applications
Power Interface Switch for Power Over Ethernet (PoE) Devices
Voltage - Supply
14 V ~ 16 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
32-DFN
Current - Supply
1.35mA
Interface
IEEE 802.3af
Controller Type
Powered Device Interface Controller (PD)
Input Voltage
60V
Supply Current
6.4mA
Digital Ic Case Style
DFN
No. Of Pins
32
Duty Cycle (%)
88%
Frequency
100kHz
Operating Temperature Range
0°C To +70°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
32
Mounting
Surface Mount
Package Type
DFN EP
Case Length
7mm
Screening Level
Commercial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
LTC4269-1
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
4
PARAMETER
PWM Controller (Note 10)
Power Supply
V
V
V
V
V
V
Feedback Amplifi er
Feedback Regulation Voltage (V
Feedback Pin Input Bias Current
Feedback Amplifi er Transconductance
Feedback Amplifi er Source or Sink Current
Feedback Amplifi er Clamp Voltage
Reference Voltage Line Regulation
Feedback Amplifi er Voltage Gain
Soft-Start Charging Current
Soft-Start Discharge Current
Control Pin Threshold (V
Gate Outputs
PG, SG Output High Level
PG, SG Output Low Level
PG, SG Output Shutdown Strength
PG Rise Time
SG Rise Time
PG, SG Fall Time
Current Amplifi er
Switch Current Limit at Maximum V
ΔV
Sense Voltage Overcurrent Fault Voltage
Timing
Switching Frequency (f
Oscillator Capacitor Value (C
Minimum Switch On Time (t
Flyback Enable Delay Time (t
PG Turn-On Delay Time (t
Maximum Switch Duty Cycle
SYNC Pin Threshold
SYNC Pin Input Resistance
CC
CC
CC
CC
CC
CC
SENSE
Turn-On Voltage, V
Turn-Off Voltage, V
Hysteresis
Shunt Clamp
Supply Current (I
Start-Up Current
/ΔV
CMP
CC
OSC
CC(ON)
CC(OFF)
)
CMP
PGDLY
)
ON(MIN)
OSC
ENDLY
)
)
FB
)
)
)
)
CMP
CONDITIONS
V
V
V
V
R
ΔI
V
V
12V ≤ V
V
V
V
Duty Cycle = Min
V
C
C
C
V
V
C
(Note 12)
CC(ON)
UVLO
CMP
CC
FB
FB
CMP
SFST
SFST
UVLO
PG
SG
PG
SENSE
SENSE
OSC
CMP
C
, C
= ±10μA
= 0.9V
= 1.4V
= 10V
= 1nF
= 1nF
= 100pF
= Open (Note 11)
= 1.2V to 1.7V
Open
= 1.5V
= 1.5V, V
SG
= 0V, I
= 0V; I
+
+
CC
, V
– V
= 1nF
A
SFST
≤ 18V
CC(OFF)
= 25°C.
VCC
PG
UVLO
< 1V
, I
= 15mA
SG
The
= 0V
= 20mA
l
denotes the specifi cations which apply over the full operating
l
1.220
19.5
MIN
700
0.8
6.6
14
25
16
88
84
33
85
8
4
4
1.237
0.005
1000
1400
15.3
20.5
2.56
0.84
0.01
0.07
1.53
TYP
180
200
206
100
200
265
200
9.7
5.6
6.4
1.3
7.4
1.6
55
20
11
15
10
98
88
40
1
1.251
MAX
1400
0.02
0.05
400
110
230
110
200
6.5
2.3
2.1
16
11
10
90
25
8
42691fb
UNITS
μmho
%/ V
V/ V
V/ V
kHz
mA
mA
mV
mV
μA
nA
μA
μA
ns
ns
ns
pF
ns
ns
ns
%
V
V
V
V
V
V
V
V
V
V
V
V

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