TP8305B High Efficiency Constant Current Limiting WLED

TP8305B High Efficiency Constant Current Limiting WLED

Product introduction

The TP8305B is a step-up DC/DC converter designed to drive white LEDs with a wide input voltage range (0.8~5.5V), adjustable constant current and limited current modes. The frequency conversion mode is adopted to limit the current cycle by cycle, so that the input and output currents change uniformly with the decrease of the power supply voltage. The device can drive a single high-power white LED with a single or double dry battery, and can also drive two, three or more WLEDs with a single lithium battery. The method of driving the WLEDs in series can provide equal WLED currents, resulting in uniform brightness.

The low feedback voltage of 46mV minimizes power dissipation in the current regulation resistor, improving efficiency. The current limit feedback voltage of 46mV can be set according to different needs.

The difference between TP8305B and TP8305 is that in current limiting mode, as the input voltage decreases, TP8305 input and output current

There will be a sudden change at a certain point, TP8305B adopts the frequency conversion mode to avoid this phenomenon. All other functions remain unchanged. Please refer to the last description of the specification for details.

Features

External MOS tube, adjustable output voltage, can drive high-voltage, high-power loads, such as 10V1A.

·Drive 0.3W-7W single white LED

·Can drive multiple WLED lights

·Efficiency up to 90%_·0.8V extremely low operating voltage (V DD to Vout)

·Constant current accuracy: ±5%_·Current limiting accuracy ±6%; ultra-low current limiting voltage 46mV

·Chip VDD overvoltage shutdown

·Temperature protection function (130℃ protection point)

Scope of application

Constant current source, such as LED flashlight, backlight module, etc.

Constant voltage source, such as bluetooth speaker, mobile power supply, etc.

Occasions that need to accurately limit the input current, such as LED flashlights with current limiting schemes

typical application:

Constant voltage and current limiting function to drive the load scheme.

Hong Kong Xinrui guarantees original imported spot

Xinrui Electronics (Hong Kong) Co., Ltd., a professional component distributor (authorized and non-authorized brands) for 18 years, one-stop terminal manufacturer supporting: (quality assurance and integrity management) is the company's commitment to provide customers with brand original semiconductors, electronic products Component terminal supporting market, focusing on ESD/TVS electrostatic protection diodes, LDO low-power voltage regulators, MOS tubes, battery charging and management power supplies, LEDs, optocouplers, resistors and capacitors, PCB solutions (wireless Bluetooth solutions, One-stop Bluetooth sports solution, speaker, wireless power bank).

Main products: ESD electrostatic diodes, TVS diodes, battery charging and management power supplies, MOS tubes, LDO low-power voltage regulators.

Company: Xinrui Electronics (Hong Kong) Co., Ltd.

Contact: Miss Yao

Mobile: 13725590222

Tel: 0755-83780666/83265111

Fax: 0755-82800889

QQ: 3373563833

Address: 26B, Block B, Huaqiang Plaza, Futian North Road, Futian District, Shenzhen

Company website: www.xrdz-hk.com

Part of the company's stock:

TLV70433DBVR、TP4101、TP5100、TP4056、RT9013-33PB、TPS73618DBVR、MIC5255-3.0YM5、CDSOT23-T36C、CDSOT23-24C、TL431CDBZR、TL431IDBZR、TLV1117CDCYR、LM317EMPX、NCP1117ST33T3G、NCP1117ST50T3G、PESD5V0V1BL、PESD5V0V1BSF、PESD2CAN、PESD5V0S1BA、PESD12VS2UT、PESD15VL2BT , PESD36VS2UT, PESD3V3L1BA, PESD24VL2BT, IP4220CZ6, IP4223CZ6, BCP56-16, BCP51-16, BSN20, uClamp0511T.TCT, SRV05-4.TCT, RCLAMP0531T.TCT, RCLAMP0502A.TCT, SD05C.TCT, SRAMP05.TCT 、ESD5Z2.5T1G、ESD5Z3.3T1G、CM1213A-01SO、CM1213A-04SO、NTR4501NT1G、NTR4502PT1G、NTR4170NT1G、NTR4171PT1G、RLST23A032C、RLST23A0122C、RLST23A052C、PRTR5V0U2X、GBLC03CI-LF-T7、GBLC03C-LF-T7、GBLC05CI-LF-T7 , GBLC05C-LF-T7, GBLC08CI-LF-T7, GBLC08C-LF-T7, GBLC12CI-LF-T7, GBLC12C-LF-T7, GBLC15CI-LF-T7, GBLC24CI-LF-T7, GBLC24C-LF-T7, PSD03C -LF-T7, PSD05-LF-T7, PSD05C-LF-T7, PSD08C-LF-T7, PSM712-LF-T7, AO3400, AO3400A, AO3401A, AO3402, TPSMB6.8CA-E3/52, TPSMB6.8A, TPSMB47A , TPSMB43A, TPSMB39A, TPSMB36A, TPSMB33A, TPSMB30A, STTH208, SGM2036-3.3YUDH4G/TR, etc.

For more models, please inquire:

Xinrui Electronics (Hong Kong) is a professional supplier of integrated circuits and has many years of sales experience in our bank!

With a large stock of stock, integrity-based, customer first, the quality of products for customers!

Due to the large number of company models, it is impossible to upload them one by one. If you can't find the product you want on the website, please contact the salesperson. Our company can provide electronic components distribution service.

Company: Xinrui Electronics (Hong Kong) Co., Ltd.

Contact: Miss Yao

Mobile: 13725590222

Tel: 0755-83780666/83265111

Fax: 0755-82800889

QQ: 3373563833

Address: 26B, Block B, Huaqiang Plaza, Futian North Road, Futian District, Shenzhen

Company website: www.xrdz-hk.com

Hong Kong Xinrui guarantees original imported spot

It is reported that SK Hynix, through its subsidiary SK Hynix System IC (SK Hynix System IC), has invested 10 million US dollars in the foundry business in Wuxi, and the use of funds depends on the plant construction plan.

Last year, SK hynix made major adjustments to the foundry business, independent of the system IC business department, and the establishment of the subsidiary SK hynix System IC. In 2017, SK Hynix's wafer foundry business achieved revenue of US$260 million, accounting for only 0.4% of the world's total. SK Hynix has also said that it will accelerate the expansion of the foundry business with the strategy of producing in China and R&D in South Korea.

In July this year, SK hynix stated in an email statement yesterday that its wholly-owned subsidiary SK hynix System IC and Wuxi Industry Development Group, an investment company under the Wuxi Municipal Government, jointly established an 8-inch wafer foundry and established a new production line. The production of analog semiconductors (sensors, power management chips, etc.) is expected to start in the second half of this year, complete in the second half of 2019, and officially start production in 2020.

In 2017, SK Hynix and Samsung successively launched independent wafer foundry business, which is undoubtedly a move to make full use of the industrial dividends brought by the storage industry and expand their non-storage business. The structure of South Korea's semiconductor industry is unbalanced. Storage types account for more than 80% of the semiconductor industry, and the localization rate of non-storage semiconductors is low, and 80% depends on imports. In view of this, Korean semiconductor experts have repeatedly warned that the Korean semiconductor industry should not rely too much on the memory chip business. Samsung and SK Hynix are also aware of the reality that the "good times don't last long" in storage, and are making full use of the industrial dividends brought by the storage industry to expand their non-storage businesses. This year, both SK Hynix and Samsung have vigorously developed their foundry business. SK hynix's Wuxi foundry is an important step in its strategy to expand overseas markets.