Preface
When it comes to flashlights, there is actually an interesting history of development. Xiaobian still remembers the earliest first generation of old-fashioned flashlights with surface electroplated iron sheet as the shell, using a combination of tungsten bulb + alkaline battery, its biggest shortcoming is that the service life is short, easy to be burned out, the battery volume is huge, but the battery life is average. When it comes to the second generation of flashlight, there has been a new breakthrough in both performance and appearance, which uses krypton bulb + alkaline battery, which has a longer bulb life and longer battery life.
The core feature of the third-generation flashlight is the built-in LED, which is more reliable, lower heat generation and more power saving. Finally, to the fourth generation of flashlight, it completely broke the previous mode of flashlight, its built-in intelligent power management chip, through the power management chip intelligent allocation of output current, voltage, higher efficiency, more durable, and some models support fast charging and reverse output, which can be described as "one machine for two purposes".
Application of power management chips in flashlights
Yingjixin IP5209
Yingjixin IP5209 is a mobile power solution chip that integrates charging and discharging and has its own identification function, supports 2.1A charging and 2.4A discharge, charging efficiency up to 97%, integrates 14Bit ADC, supports NTC thermal probe, and also provides power display support, the chip has the characteristics of high efficiency, maturity and stability, and adopts QFN24 package.
Application examples
Nut "battery-shaped battery" power bank (flashlight version)
The nut "battery-shaped battery" mobile power bank (flashlight version) continues the overall style of the previous generation of products, and on this basis, the function of a flashlight is added, which can be used for emergency lighting. The internal structure and materials of the product have not changed basically.
Related Reading:
Teardown Report: Nut "Battery-Shaped Battery" Power Bank (Flashlight Version)
Yingjixin IP5305
Yingjixin IP5305 mobile power supply SOC This chip integrates a boost converter, lithium battery charging management, battery level indication, supports 1.2A switch charging and 1A synchronous boost output, and a single chip realizes the function of mobile power supply.
The IP5305's synchronous boost system provides 1.0A of output current with a conversion efficiency of up to 91%. When there is no load, it automatically enters the sleep state, and the quiescent current drops to 100uA. The IP5305/IP5305T uses switch-charging technology to deliver 1.2A and charge efficiency up to 92%. The built-in IC temperature and input voltage intelligently regulate the charging current and is available in an ESOP8 package.
Application examples
NexTool Outdoor 12-in-1 Thundering Music Flashlight
Nato 12-in-1 music flashlight has the function of four-color flashlight, built-in wireless speaker, supports music rhythm light, work light and camp light function, supports pickup atmosphere light, warning light, sound and light siren and power bank function. The flashlight supports telescopic focusing function, with white, red, green and blue light, and supports brightness adjustment. The built-in power bank can also charge the phone in an emergency, which is very practical.
Related Reading:
Teardown Report: NexTool Outdoor 12-in-1 Thundering Music Flashlight
钰泰ETA9742
Yutai ETA9742 is a mobile power bank charge and discharge chip, normally open 5V, automatic load start, built-in 9V withstand voltage capacity, maximum charging current up to 3A, discharge current up to 2.4A, with charging indicator, full indicator, discharge indicator, heartbeat power lamp, using ESOP8 package, can be used for various mobile power supplies.
Application examples
Philosophical white flashlight power bank
The overall shape of this Zeseco white flashlight power bank is small, whether you are going out or at home, it can be used as a temporary lighting tool. At the same time, it can also act as a small power bank with a built-in 4600mAh battery. And in addition to the USB-A port can provide output, the USB Type-C port also supports power output, which is obviously more versatile than the one-way input of Micro-USB.
Related Reading:
Teardown report: Zeseco Philosophy White Flashlight Power Bank
Summary of the charging head network
Power management chips bring a new solution to the flashlight industry. From the first generation of iron flashlights to today's smart flashlights, the iterative upgrade of related chips makes the flashlight not only a lighting tool, but also a multi-functional portable power supply. Through the built-in power management chip, the flashlight not only realizes the efficient management of charging and discharging, but also intelligently deploys the output current and voltage, which improves efficiency and stability, prolongs the service life, and brings more functions to the product.
With the continuous development of technology, it is foreseeable that the application of power management chips in the field of flashlights will be more diversified and intelligent. Perhaps in the future, flashlights will no longer exist only for lighting, and we will see more cool and trendy smart flashlights appear, becoming people's daily fashion items.