JW1236A杰華特LED照明電源去頻閃驅動IC

原裝杰華特JW1236 JW1236A JW1236ATOG杰華特LED照明電源去頻閃驅動ICJW1765C去頻閃LED驅動IC原裝現(xiàn)貨 SOT23-6 JOULWATT杰華特原裝優(yōu)勢現(xiàn)貨庫存。

JW1765CSOTB JW1236BSOTB JW1236ASOTB JW1236BTOG JW1237ESOP原裝現(xiàn)貨JW1221A

JW1236A1236B is used to drive a LED string (≤80V),and remove the 100/120Hz current ripple on AC/DC power by a capacitor between VC andGND. If the voltage on LED pin exceeds 5V, the currentripple removing function is disabled, which could help to limit the power dissipation on chip.JW1236B provides short protection, open protection and HOT-PLUG protection.The maximum LED current is internally limited at

2.3A.

JW1236Aprovides over thermal protection. When the OTP is trigged, ripple current will be released

with the temperature.

JW1236A特點：

Adaptive 100/120Hz current ripple remover @Input voltage range 15V~80V @Built-in 80V power MOSFET @Programmable LED current ripple @Internal LED voltage limit @Internal LED current limit @Short/Open protection @Hot plug protection @Over temperature protection

@TO252-2 , TO220-3 and TO252-5 packages。

Note： 1)Exceeding these ratings may damage the device. 2)The JW1236B guarantees robust performance from -40°C to 150°C junction temperature. The junction temperature range specification is assured by design, characterization and correlation with statistical process controls. 3)The JW1236B includes thermal protection that is intended to protect the device in overload conditions. Thermal protection is active when junction temperature exceeds the maximum operating junction temperature. Continuous operation over the specified absolute maximum operating junction temperature may damage the device.

4)Measured on JESD51-7, 4-layer PCB.

JW1236B杰華特LED照明電源去頻閃驅動IC

JW1236B is designed for driving one LED string(≤80V) and removing the 100/120Hz LED current ripple. Theory of OperationThe LED string and JW1236B are both suppliedby an AC/DC current source. The LED pin is connected to the cathode of LED string. JW1236B transfers the LED current ripple tovoltage ripple on chip, and ensures the constant voltage across LED string and the current flowthrough LED string. The scalable adaptive function of JW1236B canregulate the cathode voltage of LED string to minimum to improve the efficiency of the system. Adaptive Regulation JW1236A controls the output voltage of internalDigital-Analog converter (DAC) by monitoring theoperation state of built-in NMOSFET. Theefficiency of system is relatively low when NMOSFET always work in the saturation region. JW1236B detects it and increases the digital inputof the DAC and ILED, then the output voltage of

power supply is reduced, and the voltage drop on

JW1236A杰華特LED照明電源去頻閃驅動ICNMOSFET decreases.

Conversely, when NMOSFET is working in thelinear region, LED current regulation loop is open. JW1236B detects it and decreases the digitalinput of the DAC and ILED, then the output voltage of power supply is raised, and the LED currentregulation loop is close. LED Pin Voltage Limit The voltage ripple on LED pin is very large whenthe current ripple is removed, which would bring large power dissipation on chip. JW1236B limitthe voltage on LED pin as 5V internally. When the voltage on LED pin reaches 5V, the current rippleremoving function is blocked. LED Current Limit The current of LED is limited to 2.3A internally. The current limitation can protect the chip whenLED is short connected or HOT-PLUG. The function of current limit is higher priority thanLED Pin voltage limit. It means that the voltage onLED Pin is limited when LED current exceed2.3A. LED Short Protection When the VD voltage is higher than 17V andVIN-VD<6V, and the state holds for more than 25us, JW1236B considers the LED string isSHORT connected, and shut down the internal MOSFET until VIN-VD>6V.

深圳市瑞新盛科技有限公司代理銷售LED驅動IC/電源IC，MOS管。代理經(jīng)銷：SM明微,Macroblock(MBI聚積),士蘭微，

PowTech（華潤矽威），杰華特JW,昂寶OB,SY矽力杰,BPS晶豐，CL芯聯(lián),XL芯龍，歐創(chuàng)芯OCX等品牌，瑞新盛大量現(xiàn)貨庫存；

聯(lián)系人楊生13823608717 QQ：1732328706

JW1236A杰華特LED照明電源去頻閃驅動ICJW1765C去頻閃LED驅動IC原裝現(xiàn)貨 SOT23-6 JOULWATT杰華特原裝優(yōu)勢現(xiàn)貨庫存。