DC1477A Linear Technology, DC1477A Datasheet - Page 2

• Manufacturer Part Number: DC1477A
• Description: BOARD EVAL LTM4609
• Manufacturer: Linear Technology
• Series: µModuler

Specifications of DC1477A

• Main Purpose: DC/DC, Step Up or Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 30V
• Current - Output: 10A
• Voltage - Input: 10 ~ 36V
• Regulator Topology: Buck-Boost
• Frequency - Switching: 300kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LTM4609
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

Demonstration circuit DC1477A is an easy way to evaluate
the performance of the LTM4609EV. Please refer to Figure 1
for proper measurement equipment setup and follow the
procedure below:
1. Place jumpers in the following positions for a typical
2. With the power supply off, connect the input power
3. Turn on the power at the input. The output voltage
4. Once the proper output voltage is established, adjust the
DEMO MANUAL DC1477A
QUICK START PROCEDURE
2
30V
supply, load and meters as shown in Figure 1. Preset
the load to 0A and V
should be 30V ±2%.
load within the operating range and observe the output
voltage regulation, ripple voltage, efficiency and other
parameters. A cooling fan and heat sink are necessary
for V
OUT
RUN
IN
ON
< 10V and I
application:
CLOCK
PROG
OUT
IN
supply between 10V to 36V.
= 3A.
MODE
CCM
START
SSO
5. To measure input and output ripple, please refer to
6. To adjust the switching frequency turn off the power
7. Inductor and R
8. The input filter formed by CIN2, L2 and L3, CIN3 and
9. The optional components Rsnb1 and Csnb1, Rsnb2 and
Figure 2 for proper setup.
supply and modify R6 and R7. Do not allow voltage at
pin PLLFLTR to exceed 2.4V.
modate certain input and output condition. Refer to
the data sheet for details.
CIN4 is for the purpose of reducing the input voltage
ripple. The magnetic beads L2 and L3 are not necessary,
but they help to reduce the high frequency ringings on
the input supply significantly. See Figure 5 for details.
Csnb2 can be used to form RC snubber circuits on the
switching nodes, which may help to reduce the output
ripple. Refer to the data sheet for details.
SENSE
should be modified to accom-
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