Despite the growing demand for larger battery cells, battery prices remain quite high, constituting the most expensive component in an EV or PHEV, with a typical price tag of around $10,000 for a battery that supports a range of a few hundred kilometers. The high cost can be mitigated by using lower-cost/refurbished battery cells, but such cells will also have greater capacity mismatches, which will reduce the available runtime or driving distance on a single charge. Even higher-cost, higher-quality battery cells will age and mismatch after repeated use. There are two ways to increase the capacity of a battery pack with mismatched cells: one is to use larger batteries from the beginning, which is not cost-effective; the other is to use active balancing, a new technology that can restore battery capacity in the battery pack and quickly increase power. Full series battery cells need balancing When each battery cell in the battery pack has the same state of charge (SoC), we say that the battery pack is balanced. SoC refers to the current remaining capacity of an individual battery relative to its maximum capacity as the battery is charged and discharged. For example, a 10Ah battery will automatically equalize the state of charge between parallel-connected battery cells over time as long as there is a conductive path between the battery cell terminals. It can also be argued that the state of charge of series-connected cells will vary over time for a variety of reasons. Temperature gradients across the pack, impedance, self-discharge rates, or differences in load between individual cells can cause gradual changes in SoC. While pack charge and discharge currents help to minimize these cell-to-cell differences, the cumulative mismatch will only increase unless the cells are periodically balanced. Compensating for gradual changes in cell SoC is the most fundamental reason to balance series-connected cells. Typically, passive or dissipative balancing schemes are sufficient to rebalance the SoC of cells with similar capacities in the pack.
DC1018B-B, an overvoltage protection regulator demonstration board for the LT4356-2 with auto-retry capability where the auxiliary amplifier remains on during shutdown.
Supports data monitoring and PD packet injection on CC1 and CC2 lines, and voltage and current detection on VBUS and VCONN.
A low-cost PD-powered reflow soldering heating plate that uses a cermet heater (MCH) instead of a PCB heating plate for heating. It has a USB Type-C input port and can be powered by a 60W (65W) PD power supply.
This document is an engineering report describing the design of a non-isolated, buck-boost LED driver (power supply) using the LYTSwitch family device LYT4313E.
The DER-357 provides a single 12 W triac dimmable constant current output. The main design goal is to achieve high efficiency to increase luminous efficiency and reduce size. This allows the driver to fit into the BR40 lamp and be as close to the production design as possible.
This document is an engineering report describing an isolated power factor dimmable LED driver (power supply) using the LYT4314E from the LYTSwitch family of devices. The DER-366 provides a single 20W (36 VTYPICAL) dimmable constant 550 mA current output over an input voltage range of 190 to 265 VAC. Key design goals are high efficiency to maximize efficacy and small size. This allows the driver to be installed into a PAR38 sized lamp as close as possible to the production design.
This document is an engineering report describing the design of a non-isolated, step-down LED driver (power supply) using the LYTSwitch-4 series device LYT4312E.
DER-359 provides a single 8 W dimmable constant current output.
The main design goal is to achieve high efficiency to increase luminous efficiency and reduce size. This allows the driver to fit into the BR30 lamp and be as close to the production design as possible.
This document introduces a highly compact and cost-effective step-down power supply designed using the LYTSwitch-0 series device (LYT0006D).
The power supply can operate from an input voltage range of 90 to 132 VAC. The DC bus voltage is high enough to support a 38 V output when using a buck topology. In a buck converter, the output voltage must always be lower than the input voltage. In addition, the output voltage is also limited by the maximum duty cycle of LYTSwitch-0, which also requires that the input voltage must be higher than the output voltage.
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