How To Clean A Fitbit Charge 3

Posted: December 5, 2022
Contributing Writer: Stacy Wegner

New Pattern Win for Cypress Semiconductor

As the cease of 2022 looms, many people are preparing not only for the gift giving season, only for the onset of their fitness resolutions too. People everywhere are promising to get moving come January i, 2022, and many of those plans include a new fitness habiliment device.

In that location are still some doubts amidst market analysts of the longevity of the fettle tracker and the smartwatch market. But every bit long every bit companies similar Apple and Fitbit proceed their success on the wrists of millions of people, TechInsights will go along to teardown, compare, and analyze these electronic health coaches.

Figure 1: Fitbit Charge 3

Figure 1: Fitbit Charge three

Figure 2: Apple Watch Series 4

Speaking of Fitbit, the recent Fitbit Charge 3 has practical better-than-modest upgrades to its display and fitness functions over the Fitbit Charge 2 model. Simply the virtually significant change in the Charge three is that the MCU and Bluetooth functionality are at present combined using one component from a new Cypress Semiconductor PSoC product family.

The New MCU Design Win

The fettle trackers we analyze are mostly designed using MCUs from Texas Instruments, or with STMicroelectronics MCUs like what we found in the Fitbit Charge 2.

This twelvemonth, Fitbit redesigned the Charge 3 with a new Cypress Semiconductor CY8C68237FM-BLE, function of the Cypress Semiconductor PSoC half-dozen production line. This specific Cypress PSoC half dozen has two ARM Cortex-K cores, (Cortex-M4 and Cortex-M0) and Bluetooth LE connectivity all on one chip.

Figure 3: Fitbit Charge 2 with STMicroelectronics MCU and Texas Instruments Bluetooth Chip

Figure 4: Fitbit Charge 3 with Cypress Semiconductor PSoC 6 CY8C68237FM-BLE Dual ARM Cortex and Bluetooth LE

Figure iv: Fitbit Charge 3 with Cypress Semiconductor PSoC six CY8C68237FM-BLE Dual ARM Cortex and Bluetooth LE

The Cortex-M0 core in the PSoC 6, and the larger bombardment, help the Charge 3 achieve its reported 7-day long battery life, even with the Accuse iii's new, larger touchscreen brandish.

Simply the MCU and Bluetooth philharmonic blueprint change in the Charge 3 was non a total loss for STMicroelectronics or Texas Instruments. Both manufacturers nonetheless won the designs for the sensors and power management sockets.

One Last Note

Another interesting deviation between the two Fitbit Charge trackers is what nosotros did not discover on the Charge 3 chief board.

Where we found a sensor, some passive components, and many examination points on the primary board backside of the Fitbit Accuse 2, the Charge 3 was noticeably different.

On the principal board of the Charge 3 we found a big, empty IC socket. Either this empty place is used for testing and verification during the manufacturing build (doubtful), or it is possible that Fitbit has something in store for an upcoming model and they plan to re-use the aforementioned Charge three master board.

Figure 5: Fitbit Charge 2 - Main Board, Side 2

Figure 5: Fitbit Charge 2 - Master Board, Side 2

Figure 6: Fitbit Charge 3 - Main Board, Side 2

Figure 6: Fitbit Charge 3 - Main Board, Side two

This is full speculation, of course. However, note just under test point 20 in Figure six. The size and pattern of the four larger pads looks very much like pads for an oscillator. So what 64-pin BGA IC would need its ain oscillator? For now, nosotros simply exercise not know, but if and when Fitbit decides to release a 'new' Charge iv, TechInsights will accept an answer.

In the concurrently, good luck with those resolutions!

Aleady a subscriber?

TechInsights Teardown subscribers already have access to exclusive content in the TechInsights Platform.

Interested in a subscription?

TechInsights offers subscriptions to the broadest range of assay and expert commentary. Contact u.s. to learn most our many subscription offerings.

Larn more than

A TechInsights subscription gives you the data you demand- instantly.

Samsung Galaxy S22 Ultra teardown

Our colleagues did a quick teardown of the Samsung Exynos 2200-powered Galaxy S22 Ultra, so nosotros can share some of our early teardown results now.

Microsoft and Sony Acquisitions

Microsoft and Sony Acquisitions - a Strategy Game

Microsoft and Sony Acquisitions - a Strategy Game Contributing author: Peter Johnston Access the world'southward largest database of consumer electronics and semiconductor opposite technology Login to the Platform Microsoft and Sony have independently

Apple AirTag Teardown

Our interest in tag trackers is how much technology has evolved. We alive in a world where a device the size of a US quarter-cent piece tin have multiple antennas, radio ICs, a battery and continue to operate as a two-way radio, pinpointing objects within feet of accuracy for almost a full year.

Power Semiconductors - What is On-Resistance?