Analog Devices LTC4278IDKD#PBF, PWM Current Mode Controller, 5 (Sink) mA, 50 (Source) mA, 110 kHz, 4.5 → 20 V,

Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): MY
Product Details

Power over Ethernet (PoE) Controllers, Linear Technology

Linear Technology’s Power over Ethernet (PoE) Controller devices facilitates the injection or extraction of power into Ethernet data lines allowing the transmission of both data and power through a single cable. Some networked devices with modest power requirements such as wireless access points, IP telephones and IP cameras may make use of PoE.

Power management ICs by Linear Technology are widely used in applications such as the industrial, automotive, telecommunications, medical, computing and military Industries. The Powered Device (PD) controllers support more than one power levels of Power over Ethernet: IEEE PoE, IEEE PoE+, and LTPoE++. PSE controllers detect and classify Powered Devices (PDs) the right amount of power is sourced to PDs over the Ethernet cables.

LTPoE++, PoE+ and PoE Controllers can all be mixed and matched.
PSE and PD controllers connect and communicate with one another
Power levels of Power over Ethernet:
IEEE PoE (13 W)
IEEE PoE+ (25.5 W)
LTPoE++ (up to 90 W) standard

Switching Voltage Regulators, Linear Technology

Linear Technology product series of synchronous and non-synchronous internal switching regulator ICs offer high efficiency plus a wide input voltage range and switching frequencies up to 4MHz.
The controllers span over several types of configurations from buck (step-down), boost (step-up), buck-boost, forward, Isolated, Inverting and flyback controllers. The Flyback, Forward and Isolated Controllers primary and secondary side provide a solution to help replace the DC/DC bricks that get used in back-plane power conversion.

Specifications
Attribute Value
Number of PWM Outputs 1
Control Method Current
Topology Flyback
Rise Time 15ns
Fall Time 10ns
Maximum Duty Cycle 88%
Maximum Switching Frequency 110 kHz
Mounting Type Surface Mount
Package Type DFN
Pin Count 32
Output Current 5 (Sink) mA, 50 (Source) mA
Output Voltage 0.15 V
On/Off Pin Yes
Synchronous Pin Yes
Height 0.7mm
Length 7mm
Maximum Operating Temperature +85 °C
Typical Operating Supply Voltage 4.5 → 20 V
Minimum Operating Temperature -40 °C
Width 4mm
Dimensions 7 x 4 x 0.7mm
110 In stock - FREE next working day delivery available
Price Each (In a Pack of 2)
£ 3.55
(exc. VAT)
£ 4.26
(inc. VAT)
Units
Per unit
Per Pack*
2 +
£3.55
£7.10
*price indicative
Packaging Options:
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