FVT is at it again and with their latest offering you’ll be finding that they have followed the BLHeli S craze and came out with a small form factor ESC with 25A burst capability!
These Little Bee 20A BLHeli SESCs are compatible with the latest BLHeli S code and are designed to give you excellent performance with minimal out of pocket costs. Keeping up with the trend of better performance the guys at BLHeli have changed some of their code and this change in code requires a change in hardware so Little Bee have upped their game to keep up with the changing times. Using different MCUs is the way they’ve had to keep up with the changes and no longer are the focused on software pwm...the updated MCUs are now featuring hardware PWM that is synced to the duty cycle and this give these new ESCs the ability to write the values to the motors at double the speed when comparing to software pwm.
Here’s what SSKAUG has to say about the improvements: BLHeli_S is an improved version of the base BLHeli code.
BLHeli_S delivers a throttle response that is Smooth as Silk, and the main factor contributing to this, is that it uses hardware to generate motor PWM. Two MCUs support this for BLHeli_S, namely the BusyBee1 at 24MHz (EFM8BB10F8) and the BusyBee2 at 48MHz (EFM8BB21F16).
BLHeli_S will have the same good Sync holding properties as base BLHeli. Maybe even better.
BLHeli_S generally does Startup better than base BLHeli.
BLHeli_S does damped light. Only.
BLHeli_S has motor PWM that is Synchronous to the MCU master clock, as it is generated by hardware. This makes the motor Silent.
BLHeli_S has very Small throttle Steps. The resolution varies between hardware configurations (MCU clock speed and driver type), and is between a nominal 512 steps and 2048 steps.
BLHeli_S supports very high motor Speeds. A BB1 MCU will support 350k erpm, and the limit of the BB2 is not yet known, so the code is set to limit at 500k erpm.
BLHeli_S supports regular 1-2ms input signal, as well as Oneshot125, Oneshot42 and Multishot. Autodetected when the ESC sees an input signal.
Last and by no means least, is Simplicity. If you have a regular setup, just install and go fly (calibrate if your throttle range does not match BLHeli_S default). Or if you need to configure or update, just do so with the Simplicity offered by connecting to your ESCs through the FlightController, using BLHeliSuite and a USB cable.
ESCs will be available from several manufacturers in not too long.
You can follow the RCGroups thread to read up about them and see what others have to say here:
http://www.rcgroups.com/forums/showthread.php?t=2640796
Check out at http://www.fpvmodel.com/littlebee-20a-s-blheli_s-esc_g1166.html for genuine ESCs from FVT.
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