Data Sheet: SuperetaTM iQM Series –Single Output Quarter Brick

Vout(+)

Sense(+)

Rup

Trim

Sense(-)

Vout(-)

Circuit to increase output voltage

 

1000

 

 

 

 

 

(k )

100

 

 

 

 

 

Resistance

 

 

 

 

 

10

 

 

 

 

 

Trim

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

0

2

4

6

8

10

% Increase in Output Voltage, ∆ (%)

Remote Sense: The power modules feature remote sense to compensate for the effect of output distribution drops. The output voltage sense range defines the maximum voltage allowed between the output power terminals and output sense terminals, and it is found on the electrical data page for the power module of interest. If the remote sense feature is not being used, the Sense(+) pin should be connected to the Vo(+) pin and the Sense (-) pin should be connected to the Vo(-) pin.

The output voltage at the Vo(+) and Vo(-) terminals can be increased by either the remote sense or the output voltage adjustment feature. The maximum voltage increase allowed is the larger of the remote sense range or the output voltage adjustment range; it is not the sum of both.

As the output voltage increases due to the use of the remote sense, the maximum load current must be decreased for the module to remain below its maximum power rating.

EMC Considerations: TDK Innoveta power modules are designed for use in a wide variety of systems and applications. With the help of external EMI filters and careful layout, it is possible to meet CISPR 22 class A or B requirement. For assistance with designing for EMC compliance, please contact TDK Innoveta technical support.

The value of Vref can be found in the Electrical Data section of this data sheet. The maximum power available from the power module is fixed. As the output voltage is trimmed up, the maximum output current must be decreased to maintain the maximum rated power of the module. It is also desirable to slightly increase the input voltage while trimming up the output with heavy load current.

As the output voltage is trimmed up, the output over-voltage protection set point is not adjusted. Trimming the output voltage too high may cause the output over voltage protection circuit to be triggered.

Input Impedance: The source impedance of the power feeding the DC/DC converter module will interact with the DC/DC converter. To minimize the interaction, one or more 33-100uF/100V input electrolytic capacitors should be present if the source inductance is greater than 4uH.

Reliability:

The power modules are designed using TDK Innoveta’s stringent design guidelines for component derating, product qualification, and design reviews. Early failures are screened out by both burn-in and an automated final test. The MTBF is calculated to be greater than 2.64M hours at

©2004-2006 TDK Innoveta Inc.

℡ (877) 498-0099

13/15

iQM 1.5V/70A Datasheet 8/4/2006

 

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TDK iQM Series manual Circuit to increase output voltage, Reliability
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iQM Series specifications

The TDK iQM Series represents a significant advancement in the realm of power inductors, catering specifically to applications that demand high efficiency and reliability. Designed for use in a variety of devices, including smartphones, tablets, and power supply systems, the iQM Series is tailored to meet the rigorous demands of modern electronics.

One of the standout features of the iQM Series is its compact size. The inductors are designed to maximize performance while minimizing space, making them ideal for applications where every millimeter counts. This compact design is achieved without compromising on performance, offering high inductance values that are essential for stable operation in power conversion circuits.

TDK has integrated innovative materials in the iQM inductors, utilizing a composite magnetic core that enhances energy efficiency and thermal performance. This ensures that the inductors operate effectively even at higher currents, reducing losses associated with heat generation. As a result, the iQM Series boasts a low DC resistance, contributing to improved overall system efficiency and enabling reliable operation in demanding environments.

Another notable characteristic of the iQM Series is its broad range of inductance values, which allows designers to select the most suitable inductor for their specific application requirements. This adaptability, combined with a wide operating temperature range, enables the iQM inductors to function efficiently in various climatic conditions and across different electronic devices.

Furthermore, the iQM Series is designed with a focus on minimizing noise. Advanced construction techniques have been employed to reduce electromagnetic interference, which is crucial for maintaining signal integrity in high-frequency applications. This makes the iQM Series particularly well-suited for power management circuits used in applications like DC-DC converters and power supply solutions.

The iQM Series also boasts impressive saturation current ratings, allowing for reliable performance even in peak current scenarios. This feature is essential for applications where transient loads can cause inductors to experience higher than normal currents. The ability to handle such conditions without saturating ensures longer device life and better performance under stress.

In summary, the TDK iQM Series of power inductors stands out due to its compact design, high efficiency, versatile inductance values, and effective noise reduction features. These qualities make iQM inductors an excellent choice for engineers looking to enhance their power management circuits in today's technologically advanced devices. With TDK's commitment to innovation and quality, the iQM Series is set to play a vital role in the future of electronics.
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