DC1477A Linear Technology, DC1477A Datasheet

DC1477A

Manufacturer Part Number

DC1477A

Description

BOARD EVAL LTM4609

Manufacturer

Linear Technology

Series

µModuler

Datasheets

1.DC1477A.pdf (26 pages)

2.DC1477A.pdf (5 pages)

3.DC1477A.pdf (8 pages)

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

Current page: 1 of 5
Download datasheet (383Kb)

DESCRIPTION

Demonstration

LTM

density switch mode Buck-Boost power module. The

LTM4609EV can regulate its output voltage from input

voltage both above and below the output. The input

voltage range of DC1477A is from 10V to 36V. The

output voltage is 30V. The rated load current is 3A,

while de-rating is necessary for certain V

thermal conditions. Integrated input and output filters

enable a simple PCB layout. Only the inductor, sensing

resistor, bulk input and output capacitors are needed to

externally. An input π filter is added on the DC1477A

Table 1. Performance Summary (T

QUICK START PROCEDURE

Demonstration circuit DC1477A is easy to set up to

evaluate the performance of the LTM4609EV. Please

refer to Figure 1 for proper measurement equipment

setup and follow the procedure below:

PARAMETER

Minimum Input Voltage

Maximum Input Voltage

Output Voltage V

Maximum Continuous Output Current

Default Operating Frequency

Efficiency

Load Transient

1. Place jumpers in the following positions for a

RUN

4609EV, the high voltage, high efficiency, high

typical 30V

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC1477A

OUT

START

SSO

circuit

OUT

application:

DC1477A

MODE

CCM

= 25°C)

CONDITION

De-rating is necessary for certain V

conditions

=20V, V

HIGH VOLTAGE BUCK-BOOST POWER MODULE

CLOCK

PROG

features

OUT

, V

=30V, I

OUT

, and

OUT

the

=3A

to minimize the input ripple. The LTM4609EV can be

frequency synchronized to external frequency from 200

kHz to 400 kHz. This PLL can be used not only to re-

duce undesirable frequency harmonics but also to paral-

lel LTM4609 to provide high output current. Other fea-

tures include soft-start control, power good indicator,

over voltage protection and foldback current protection.

Design files for this circuit board are available.

Call the LTC Factory.

poration.

, V

, LTC, LT and LTM are registered trademarks of Linear Technology Cor-

OUT

2. With power off, connect the input power sup-

3. Turn on the power at the input. The output

4. Once the proper output voltage is established,

, and thermal

ply, load and meters as shown in Figure 1.

Preset the load to 0A and Vin supply to be

less than 36V.

voltage should be 30V ± 2%.

adjust the load within the operating range and

observe the output voltage regulation, ripple

voltage, efficiency and other parameters.

Cooling fan or heat sink are necessary for V

<10V and I

VALUE

10V

36V

30V± 2%

10A

300KHz

96.3%, See Figure 3 for more information

See Figure 4 for details

OUT

=3A.

@10VIN

@24VIN

@VIN > 30V

LTM4609EV

Related parts for DC1477A

DC1477A Summary of contents

Page 1

... V thermal conditions. Integrated input and output filters enable a simple PCB layout. Only the inductor, sensing resistor, bulk input and output capacitors are needed to externally. An input π filter is added on the DC1477A Table 1. Performance Summary (T = 25°C) A PARAMETER ...

Page 2

... QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC1477A 5. To measure input and output ripple, please re- fer to Figure 2 for proper setup. 6. The voltage of pin PLLFLTR determines the switching frequency. Adjust R6 and R7 to ad- just switching frequency. Do not allow volt- age at pin PLLFLTR exceed 2.4V. ...

Page 3

... QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC1477A HIGH VOLTAGE BUCK-BOOST POWER MODULE Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple. DC1477A/LTM4609 Efficiency @ 10Vin Input 100% 90% 80% 70% 60% 50% 0 0.5 1 1.5 Load Current (A) DC1477A/LTM4609 Efficiency @ 30Vin Input 100% 90% 80% 70% ...

Page 4

... QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC1477A V (200mV/div) OUT I OUT V =10V, V =30V, CCM mode IN OUT 1. load step C =2×10uF ceramic + 2×100uF Alum OUT Figure 4. Measured Load Transient Response (1.5A Step, 50% to 100%). V (1V/div) IN SW2 (10V/div) SW1 (20V/div) V =10V, V =30V, I =3A IN OUT OUT W/O input filter: short L2 & ...

Page 5

... QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC1477A HIGH VOLTAGE BUCK-BOOST POWER MODULE 5 ...

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