DC1477B: 30V @ 3A (10Vin) @ 8A (24Vin) @ 10A (>30Vin)

Summary

Demonstration circuit DC1477B features the LTM®4609EV, the high voltage, high efficiency, high density switch mode buck-boost power module. The LTM4609EV regulates an output voltage above, below, or equal to the input voltage. DC1477B accepts an input voltage from 10V to 36V with a preset output voltage of 30V at up to 3A. Derating may be necessary for certain VIN, VOUT, and thermal conditions.

An optional input π filter is added on the DC1477B to minimize the input ripple. The switching frequency may be synchronized to an external clock from 200kHz to 400kHz to reduce undesirable frequency harmonics and/or parallel multiple modules for even higher output current. The LTM4609 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1477B.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	DC1477B-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Topology	Step Up/Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	30 V
Current Out	3 A (10V in) 8 A (24V in) 10 A (>30V in)
Voltage In	10 ~ 36 V
Efficiency @ Conditions	>97%, 30V in, 30V @ 1 ~ 3 A >95%, 20V in, 30V @ 1.5 ~ 3 A >93%, 10V in, 30V @ 1 ~ 3 A
Voltage Out Range	- Not Given
Features	Light Load Mode Noise Filtering, On-Chip Over Voltage Protection Power Good Output Shutdown, Enable, Standby Soft Start Synchronizable
Switching Frequency	300 kHz
Standby Current [Typical]	35 µA
Quiescent Current [Typical]	2.8 mA
Component Count + Extras	17 + 28
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market
Standby Current [Maximum]	60 µA
Quiescent Current [Maximum]
Main I.C. Base Part	LTM4609
Date Created By Author	2011-10
Date Added To Library	2012-09