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The chip goes back to normal operation automatically after the abnormal situation is removed.
LED Driver flyer BPSemi _百度文库
Power supply Signal and Power ground The voltage feedback from auxiliary winding. The driver operates in critical conduction mode, the output current does not change with the inductance and LED output voltage.
Current path area The area of current path should be as small as possible to reduce EMI radiation, such as the primary current loop from the primary inductor to the MOSFET and the secondary current loop from the secondary inductor to the output rectifier. Please enter your Email ID. It can achieve excellent constant current performance with very few external components, so the system cost and size are minimized. BP multiple protection features built-in to enhance system reliability, include open LED protection, LED short circuit protection, chip supply over voltage protection, under voltage protection, current sampling resistor open circuit protection and by-cycle current limit and so on.
The CS is connected to non-inverting inputs of the current sense comparator. All the protection functions are auto-recovery. The operation frequency is given by: The output current is reduced when the controller is over temperature. Tell us what you need by filling in the form. Our LED driver is designed with set standards with the help of skilled professionals using high-end technology and quality-proven components.
BP works in discontinuous inductive current mode. The FB upper resistor is also used to adjust the Vcs threshold to compensation the input voltage change. It can achieve precise output current and excellent line regulation. The inverting terminal of comparator is tied to an internal mV reference.
BP3108 Datasheet PDF
For the parameters without minimum and maximum value in the EC table, the typical value defines the operation range, lfd accuracy is not guaranteed by spec. The BPMB adopts proprietary primary side current sensing scheme.
The system size and cost are optimized, as well as bp33108 system reliability. Enter Your Email ID. We are here to help! Supply Voltage 5 V. The BPMB utilizes patented line and load voltage compensation method to achieve excellent line and load regulation.
Pulsar Electronics Private Limited No. Please enter your name. The chip limits the maximum system frequency and the minimum system frequency to ensure the system stability. After the system is powered on, the Vcc capacitor is charged through the start-up resistor, once the Vcc voltage I P? The patented control method dramatically b3108 the system cost and size by eliminating all secondary feedback circuitry and loop control compensation circuitry.
During normal operation, The Vcc is supplied via the auxiliary winding. BP proprietary current sampling mechanism, work on the primary side feedback mode, without secondary feedback circuitry to achieve highly accurate output current control, saving system cost and size, to improve the reliability of the system. BP uses patented line voltage and load compensation technologies that can achieve excellent line voltage regulation and load regulation.
The BP utilizes patent pending current control method. Once the Vcc voltage is higher than 16V typ. The electrical characteristics table defines the operation range of the device, the electrical characteristics is assured on DC and AC voltage by test program. Current sense CS resistor The CS resistor ground should be as close to the chip ground as possible to reduce the ground noise coupled, which improves the quality of the sensing signal. Customers can easily avail this LED driver from us at nominal rates.