Linear Technology DC1477B Demo Manual

Description
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
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
performance summary
PARAMETER
Minimum Input Voltage
Output Voltage V
OUT
Maximum Continuous Output Current
Default Operating Frequency
Efficiency
BoarD photo
LTM 4609EV,
®
, V , and
IN OUT
(T = 25°C)
A
CONDITIONS
Derating is Necessary for Certain V
Conditions
V = 20V, V = 30V, I = 3A
IN OUT OUT
DEMO MANUAL DC1477B
LTM4609EV: 36V
Buck-Boost DC/DC
µModule
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
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.
VALUE
10V to 36V
30V ± 2%
, V , and Thermal 3ADC at 10V
IN OUT
8ADC at 24V
10ADC at V
300kHz
96.7%, See Figure 3 for More Information
, 34V
IN OUT
Regulator
®
IN
IN
> 30V
IN
dc1477bfa
1