DC1825A - Linear Technology

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

DC1825A
Manufacturer

Linear Technology
ChipWorker Part#

CW81131559
Category

Microprocessor Development Kit
Description

LINEAR TECHNOLOGY DC1825A Evaluation Board, Flyback Converter, Load Current of 1mA to 250mA, 2V-75V Input, 5V Output
Documentation

Datasheet

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DC1825A Specifications

Attribute	Attribute Value

Part Number	DC1825A
Manufacturer	Linear Technology
ChipWorker Part#	CW81131559
Category	Microprocessor Development Kit
Documentation	Datasheet
Number of Outputs	1 Output
Output Voltage	5 V
Output Current	250 mA
Switching Frequency	330 kHz
Input Voltage	22V ~ 75V
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Product Lifecycle Status	Active
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17

Product Description

The DC1825A demonstration board is an isolated flyback converter featuring LT8300ES5 device. The LT8300ES5 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary side flyback waveform, the part requires no third winding or optoisolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft start further reduce external component count. This demo board outputs 5.0V and maintains tight regulation with a load current from 1mA to 250mA and over an input from 22V to 75V, with a nominal 48V. The output current capability increases with the input voltage. The DC1825A needs a very small minimum load to regulate the output voltage. The standby input current of the demo circuit is less than 400µA (typical) because of the low quiescent current design of the IC and very small minimum load requirement.
Typical switching frequency of 330KHz
Minimum switching frequency of 8KHz
80% efficiency
Boundary mode operation at heavy load
Low ripple burst mode operation at light load
Minimum load is less than 0.5% (typ) of full output
VOUT set with a single external resistor
No transformer third winding or optoisolator required for regulation
Accurate EN/UVLO threshold and hysteresis
Internal compensation and soft start
The LT8300 requires very small minimum load to maintain good output voltage regulation. A zener diode is placed on the output to clamp the voltage to 5.0V.

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