LTC4269CDKD-1#PBF Linear Technology, LTC4269CDKD-1#PBF Datasheet - Page 11

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

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

BLOCK DIAGRAM
18
15
13
11
23
12
25
28
10
1
2
3
4
5
6
7
8 NC
15.3V
SHDN
R
NC
V
V
NC
V
UVLO
OSC
SYNC
t
PGDLY
ENDLY
NC
NC
T2P
ON
CLASS
PORTN
PORTN
CC
+
–
OSCILLATOR
V
CC
UVLO
REFERENCE
1.237V
(V
I
UVLO
FB
)
20V
+
–
SET
TSD
UVLO
+
–
1.237V
CONTROL
CIRCUITS
REGULATOR
CLASSIFICATION
CURRENT LOAD
INTERNAL
BLOCK
LOGIC
CURRENT TRIP
SLOPE COMPENSATION
–
+
ENABLE
PGATE
SGATE
3V
0.7
1.3
CLAMPS
BOLD LINE INDICATES
HIGH CURRENT PATH
16k
S
R
COMPARATOR
–
+
CURRENT
Q
Q
25k
COLLAPSE DETECT
TO FB
ERROR AMP
14V
–
+
–
+
+
–
1V
GATE DRIVE
GATE DRIVE
+
R
50k
CMPF
3V
OVERCURRENT
FAULT
–
V
V
CC
CC
–
+
–
CURRENT
SENSE AMP
LOAD
COMPENSATION
(EXPOSED PAD)
+
PWRGD
PWRGD
V
SENSE
SENSE
PORTP
V
V
V
C
R
SFST
GND
NEG
NEG
CMP
CMP
CMP
NC
PG
SG
42691 BD
FB
–
+
LTC4269-1
32
31
30
29
27
26
16
17
14
19
20
21
22
24
33
9
11
42691fb