jw1531b_datasheet_r0.8_en_20180525

1、 JW1531B BUCK CC/CV Driver Without Auxiliary Winding Parameters Subject to Change Parameters Subject to Change Parameters Subject to Change Parameters Subject to Change Without Notice Without Notice Without Notice Witho

2、ut Notice JW1531B Rev.0.8 JoulWatt® Proprietary Information. Patent Protected. 1 Unauthorized Photocopy and Duplication Prohibited. DESCRIPTION The JW®1531B is a

3、 constant voltage constant current driver with high accuracy. JW1531B integrates high voltage power source, and can be supplied from line voltage directly, and auxiliary winding is not needed, which largely simplifies th

4、e system. Low standby consumption can be achieved with deep pulse frequency modulation. Critical conduction mode operation reduces the switching losses and largely increases the efficiency. JW1531B has multi-protec

5、tion functions which largely enhance the safety and reliability of the system, including VCC over-voltage protection, VCC UVLO, LED short protection and over- temperature protection. C Co om mp pa an ny y’ ’s s L Lo og

6、go o i is s P Pr ro ot te ec ct te ed d, , “ “J JW W” ” a an nd d “ “J JO OU UL LW WA AT TT T” ” a ar re e R Re eg gi is st te er re ed d T Tr ra ad de em ma ar rk ks s o of f J Jo ou ul lW Wa at tt t t te ec ch hn no ol

7、 lo og gy y I In nc c. . FEATURES ? No auxiliary winding ? Supplied from line voltage directly ? High current accuracy of line and load regulation ? Critical conduction mode ? High efficiency over wide operating ran

8、ge ? LED short protection ? Internal over-temperature protection ? SOP7 package APPLICATIONS ? Smart LED Lighting ? Home Appliance TYPICAL APPLICATION JW1531B JoulWatt J

9、W1531B Rev.0.8 JoulWatt® Proprietary Information. Patent Protected. 3 Unauthorized Photocopy and Duplication Prohibited. ELECTRICAL CHARACTERISTICS TA=25℃, unless oth

10、erwise stated. Item Symbol Condition Min. Typ. Max. Units VCC Start-Up Voltage VCC_ST 12 13.5 15 V VCC Shut Down Voltage VCC_UVLO 8 9.3 11 V VCC Quiescent Current5) ICCQ VCC=6V 90 µA VCC Operational C

11、urrent ICCO VCC=15.5V 180 250 285 µA VCC Over Voltage Threshold VTH_OVP 16.7 18.5 20.2 V VCC Shunt Current ISHUNT VCC=18V 2.8 5 7.1 mA ISP Reference Voltage VISP_REF 218 230 242 mV ISP Minimum Vo

12、ltage5)VISP_MIN 120 mV Minimum ON Time5)TON_MIN 500 ns Minimum OFF Time5)TOFF_MIN 1 µs Maximum OFF Time5)TOFF_MAX 800 µs Maximum Switch Frequency5) FMAX 155 kHz FB Reference Voltage VFB_REF 1.52 1.6 1.68