I have finally finished my first prototype PCB but I am a bit worried about the amount of heat generated when using the BMSat max power in myapplication (ultralight hybrid electric vehicle). At 30A cont/50A burstI have almost 20Wloss. It seems to me that it would be possible to reduce power consumption to less than half of that without increasing
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costsusing: The use of N-channel MOSFETs enables a muchbetter selection of verylow Rds parts. Itwould obviouslyrequire a different driver design, but as far as I can see, there is nofundamental reasons why this should not work It isused on TI battery AFEs like the bq29330. Using MOSFETs with integrated current sensing would again reduce the number for available devices but reduces the power loss ofthe current current (!) sensor. This would either require low-side switching or current sensing level shifting to be compatible with the BQ78PL114 current sensor inputs. Here is suggested circuit for implementing a charge pump and driver in aSOT23-6 capsule. It requires only a few parts more than the bq78PL116 reference design. The suggestion make use of a new high voltage ideal diode driver from Nat. Semi that handles 75V (100V peak). It works by monitoring voltage on both sides of the FET via the IN and OUT terminal. It will turn on the gate when the IN pin is raised minimum 30 mV higher than OUT pin using a charge pump supplying 30uA gate current. The gate voltage is then raised until the IN and OUT levels are identical or until the gate voltage is clamped by an internal zener diode. If the IN pin voltage becomes 30 mV less than OUT pin the gate charge will be shorted to drain within 50-100ns using a built-in high current FET. This is controlled by the voltage divider R1/R4 (R7/R3) that feed OUT with a voltage around half...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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