LTC4269IDKD-1#PBF Linear Technology, LTC4269IDKD-1#PBF Datasheet - Page 22

• Manufacturer Part Number: LTC4269IDKD-1#PBF
• Description: IC PD/OPTO FLYBACK CTRLR 32-DFN
• Manufacturer: Linear Technology
• Type: Power Over Ethernet (PoE)r

Specifications of LTC4269IDKD-1#PBF

• Applications: Power Interface Switch for Power Over Ethernet (PoE) Devices
• Voltage - Supply: 14 V ~ 16 V
• Operating Temperature: -40°C ~ 85°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: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LTC4269-1
APPLICATIONS INFORMATION
22
R1
R2
16
FB
MOSFET DRAIN
PRIMARY-SIDE
–
PG VOLTAGE
SG VOLTAGE
VOLTAGE
1V
+
ENABLE
COLLAPSE
DETECT
LTC4269-1 FEEDBACK AMP
Figure 10a. LTC4269-1 Switching Regulator Feedback Amplifi er
1.237V
V
Figure 10b. LTC4269-1 Switching Regulator Timing Diagram
IN
V
FB
–
+
R
S
Q
t
ON(MIN)
V
ENABLE
V
DELAY
FLBK
CMP
17
42691 F10a
MIN ENABLE
AMPLIFIER
FEEDBACK
ENABLED
C
V
VCMP
FLBK
MP
PRIMARY
FLYBACK
V
IN
•
•
PG DELAY
T1
•
SECONDARY
0.8 • V
42691 F10b
MS
FLBK
+
C
OUT
ISOLATED
OUTPUT
42691fb