The world's well-known semiconductor manufacturer RoHM is used for electronic dictionaries, home appliance remote control, small objects (toys, accessories), etc., develops electric consumption low to industry minimum level, built-in MOSFET boost DC / DC converter * 1) "Bu33UV7NUX".
"BU33UV7NUX" is a boosted power supply Ic of 3.3V voltage required to output 1 to 2 dry batteries (1V ~ 3V) to the driver of the microcontroller. The development and strive of this product reduces the operating time of consuming current to extend the working time of the dry battery, and realizes the minimum level of 7μA consumption in the industry in the same function, and when 2 alkaline dry batteries driven when the remote control is standby (load current 50μA), Compared with the general product, battery life can be extended by up to 175 days (extended from 540 days to 715 days) (ROHM survey data). In addition, the load current mode switching function is also equipped with a high performance product such as a liquid crystal panel, which is very helpful to use a high-performance product such as a liquid crystal panel.
This product has been put into mass production by 1 million months in December 2017 (sample price 500 yen /: excluding tax). The production base for the early process is the ROHM headquarters factory (Japan Kyoto), the production base of the later process is Rohm Electronics Philippines, Inc. (Philippines). In addition, the evaluation board of this product "BU33UV7NUX-EVK-101" has started sales in the Ameya360 and Right ICs in January 2018.
In the future, RoHM will continue to develop high-performance, high-reliability products that use the advantages of simulation technology, contribute to energy conservation.
< Background. 1882.
In recent years, in mobile equipment headed by smartphones and wearable devices, the application of rechargeable secondary batteries such as lithium-ion batteries is increasingly wide. In electronic devices such as electronic dictionaries, home appliance remote controls, and small objects, with the diversification of the application and the expansion of overseas markets, the application of dry batteries exceeds the previous time, due to the increasing performance of these applications, The energy saving performance requirements of power supply ICs are also higher and higher.
ROHM utilizes multi-year accumulated simulation circuit technology and power system process technology advantages, has been committed to developing various power IC products that meet market needs. This technology uses these technologies, and the power supply IC required to be used in the current dry battery is developed.
< Features details. 1882.
1. The current consumption and the driving voltage are lower, which helps extend the battery life.
Using ROHM's simulation design technology and power system process, it is committed to reducing consumption, consuming current in the same functional product is only 7μA of the industry's minimum level, making dry battery applications longer. This makes two alkaline dry battery-driven remote control (load current 50μA) to have a long-term amount of about 1.3 times (up to 175 days) length than the general product (ROHM survey data). In addition, the power supply IC can be driven from a low input voltage of 0.9V, not only supporting a button-type lithium battery, but also supports the use of 1 dry battery. Moreover, the battery leak detection function is also equipped. All in all, this is an optimal power supply IC suitable for dry battery applications.
2. With load current mode switching function, high efficiency support numerous applications
For example, a load current mode switching function is equipped, so that the same remote control can also be used to adopt a high performance product such as a liquid crystal panel. It is only necessary to switch the MODE pin to help improve energy saving performance from standard products to high performance products.
The standard product uses low power mode (maximum load current 50mA, consumption current 7μA, PFM * 2), using high-power mode (maximum load current 500mA, consumption of 13μA, PFM / PWM * 2) Switching control), achieving high efficiency power conversion up to 94% under many conditions.
< Application example. 1882.
· Electronic Dictionary · Remote Control · Small Items (Toys, Accessories)
· Wearable equipment · Electric toothbrush
Wait for 1/2 dry batteries (1 ~ 3V), all applications in the button-based lithium battery
Product Model Input Voltage Range Output Voltage Consumption Current Maximum load current operating frequency operating temperature range
< Product specifications Other data. 1882.
< Evaluation board information. 1882.
Start sales time from January 2018
Web Platform Ameya360, Right IC
Evaluation Board Model BU33UV7NUX-EVK-101
Related webpage
http://www.rohm.com.cn/web/china/news-detail?news-title=2018-01-16_ad_boost&defaultgroupid=false
< Terminal solution. 1882.
* 1) DC / DC converter
One of the power supply IC is used to convert a DC (DC) voltage to a DC voltage. There are generally two types of step-down type (decreased voltage drop) and boost type (rising voltage).
* 2) PFM (Pulse Frequency Modulation / Pulse Frequency Modulation), PWM (PULSE WIDTH MODULATION / Pulse Width)
PFM is a voltage control method that has an advantage in reducing the switching loss during light load. PWM is also a voltage control method, frequency fixing, easy to predict the resulting noise interference, so it is easy to adopt a counterfeit filter such as adding filters.
Original address: https://www.eeboard.com/news/rohm-dcdc/
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