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dc1477bfa
DEMO MANUAL DC1477B
Description
LTM4609EV: 36V
IN
, 34V
OUT
Buck-Boost DC/DC
µModule
®
Regulator
Demonstration circuit DC1477B features the
,
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 V
IN
, V
OUT
, 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
L
, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
performance summary
BoarD photo
200kHz to 400kHz to reduce undesirable frequency har-
monics 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.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1477B
(T
A
= 25°C)
PARAMETER
CONDITIONS
VALUE
Minimum Input Voltage
10V to 36V
Output Voltage V
OUT
30V ± 2%
Maximum Continuous Output Current
Derating is Necessary for Certain V
IN
, V
OUT
, and Thermal
Conditions
3ADC at 10V
IN
8ADC at 24V
IN
10ADC at V
IN
> 30V
Default Operating Frequency
300kHz
Efficiency
V
IN
= 20V, V
OUT
= 30V, I
OUT
= 3A
96.7%, See Figure 3 for More Information
