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 >  Integrated Circuits > Wireless charging LSI > 13.56MHz (NFC)


Wireless charging LSI

13.56MHz (NFC)

Wireless charging LSI 13.56MHz (NFC)

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Power receiver LSI

 

Data
sheets

Function
Overview

Power
Supply

Operating
Frequency

Data
Flash
(Byte)

Charging
Control

I/F

ADC
(Method)

Operating
Temperature
  (°C)  

PKG Sample
and
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Power transmitter LSI

 

Data
sheets

Function
Overview

Power
Supply
(V)

Operating
Frequency

Data
Flash
(Byte)

I/F

ADC
(Method)

Operating
Temperature
  (°C)  

PKG Sample
and
Buy
Wireless charging LSI Sites for engineers ML7630 ML7631 Special Site
 

Overview

LAPIS Semiconductor's 13.56 MHz wireless charging LSI

LAPIS Semiconductor's 13.56 MHz wireless charging chip set, "ML7630" and "ML7361", are designed for wireless charging system using the 13.56 MHz for power transfer. Small devices such as wearable and hearable devices with a limited space for antenna implementation can be "connectorless" because the antenna can be downsized by using this bandwidth.

Power receiver LSI "ML7630" can provide 200mW of a charging output. It also includes Tag function to allow Bluetooth® pairing, etc. by NFC touch. These functions are included in a WL-CSP package of 2.6 × 2.6mm.

Power transmitter LSI "ML7631", integrates functions necessary for power transmission such as detecting the dropout of the power receiver device, setting the power transmission output level, etc. into one chip, controlling the operating voltage to 5 V to ensure the operation from a USB power supply such as mobile battery. It can also mobilize the entire power charging system and is the optimum system for achieving a wireless power supply solution for small devices such as wearables.

Product feature

Feature1
Super small chip with the power receiver function "ML7630", build-in software removes the need for software development

Power receiver LSI "ML7630" can incorporate the power receiver function in a 2.6mm WL-CSP package, with only external parts of a condenser in addition to a charger IC and four rectifier diodes.

Both "ML7630" and "ML7631" have a built-in software and no further development is necessary. Settings for each user can be configured separately from the PC tools provided by LAPIS Semiconductor.

Feature2
Equipped with NFC Forum Type3 Tag function

Power receiver LSI "ML7630" has NFC Forum Type3 Tag function.

This is a ROM function that can read a fixed data written in advance in NDEF format* to a build-in 1 KB data flash. It can also communicate with an external NFC reader/writer via the tag data.

NDEF format: NFC Data Exchange Format
A data format used for data exchange in NFC.

Feature3
Highly reliable Li-ion battery charging

ML7630 can control the LDO output within the proper temperature range by using an external thermistor for measuring a charging temperature.

Temperature can be measured in two ways: by the build-in 10 bit ADC with software and by the build-in hardware comparator.

Charging temperature can be controlled by both methods to ensure a highly reliable Li-ion battery charge, for which the charging temperature is important.

Feature4
Driven at 5V can mobilize the entire system

The power supply voltage of "ML7631" is 5V, which can be driven by a USB power supply such as mobile battery.

Since "ML7630" does not need power supply, mobile battery + "ML7631" + "ML7630" + target device to be charged, for example, can be configured and the entire system can be mobilized.

Feature5
Optimization of power transmitter

"ML7631" provides a function to adjust the power transmitter.

"ML7630", on the other hand, determines the voltage after rectification by the build-in ADC as well as any power shortage or surplus from unnecessary current passing through the build-in shunt regulator, and then notifies that information to "ML7631", allowing "ML7631" to eliminate unnecessary power transmission and to optimize the amount of power transmission.

Feature6
High-level safety by the detection function of foreign object and the dropout of the device

"ML7631" detects changes in power transmitter current/voltage by the build-in 10 bit ADC and stops the LDO output. It detects a metal piece or IC card to prevent heat or damage.

It also detects when "ML7630" goes out of the wireless charging range to prevent unnecessary power transmission.

 

Applications

System with a rechargeable battery about 50 mAh

13.56MMHz wireless chargingLSI supported application

LAPIS Semiconductor's 13.56 MHz wireless charging chip set is useful for building a wireless charging system for compact devices with a limited space such as wearable devices with a rechargeable battery about 50 mAh, Bluetooth® headset, earphone, etc.

 

LSI Evaluation Kit

  Evaluation
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Outline
Evaluation Board
Contents
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Evaluation kit provided

Evaluation kit provided
  • Evaluation kit provided
    • Evaluation kit for the wireless charging chip set is available.
      The evaluation board for operation check comes with connection cables and software tools, etc. (Attachments may change for each LSI.)


 

LSI Documents Download

 

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