《伟诠电子股份有限公司》由会员分享，可在线阅读，更多相关《伟诠电子股份有限公司（5页珍藏版）》请在金锄头文库上搜索。
1、偉詮電子股份有限公司偉詮電子股份有限公司 YKW-06 Preliminary release Rev. 0.30（20060118） YKW-06 Step-down Switching Controller GENERAL DESCRIPTION The YKW-06 is a step-down DC-DC converter. It could drivers an external power transistor using the PWM control. The IC incorporates the soft-start function with a proper capa
2、citor connected between SS and ground pins. The soft-start function could ensure the PWM output pulse width starts from 0% duty cycle. The output voltage is controlled by the external sense resistor and FB pin. The output voltage are also adjustable by the external variable resistor connected throug
3、h SS and BRT pins. Through changing this external resistor value, could tune the output current and voltage. It also has the over voltage detection function with debounce-timer check to prevent from the over voltage damage. FEATURES Operation voltage range : 2.4V 6.0V Adjustable output voltage Built
4、-in oscillator Soft start function Over voltage protection with the debounce-timer check. 8-pin DIP/MSOP/SOP packages APPLICATIONS White LED lighting controllers Step-down DC-DC converters Portable equipment PIN CONFIGURATION BRTCOMPFBVDDOUTSSOVPGND12348765PIN DESCRIPTION Pin No. Pin Name I/O Descri
5、ption 1 OUT O PWM output (High : PWM on period) 2 SS B Soft-start timing Setting with external capacitor 3 OVP I Over voltage protection and Disable function 4 GND P Ground 5 FB I Output voltage feedback sense, error amplifier(-) input 6 BRT I Output current setting , error amplifier(+) input 7 COMP
6、 O Output voltage, error amplifier(o) output 8 VDD P Power supply 新竹市科學工業園區工業東九路 24 號 2 樓 TEL:03-5780241 FAX:03-5794278.5770419 Page 1 of 5 偉詮電子股份有限公司偉詮電子股份有限公司 YKW-06 Preliminary release Rev. 0.30（20060118） BLOCK DIAGRAM Soft-start controlCOMPSSOUTVDDIssVrefFBBRTGNDVovpOVPELECTRICAL CHARACTERISTICS
7、 Absolute Maximum Ratings Parameter Min. Max. Units DC Supply Voltage (VDD) -0.3 6.0 V Input and output voltage -0.3 VDD+0.3 V *Note: Stresses above those listed may cause permanent damage to the devices 新竹市科學工業園區工業東九路 24 號 2 樓 TEL:03-5780241 FAX:03-5794278.5770419 Page 2 of 5 偉詮電子股份有限公司偉詮電子股份有限公司 Y
8、KW-06 Preliminary release Rev. 0.30（20060118） RECOMMENDED OPERATING CONDITIONS Parameter Min. Typ. Max. Unit Supply Voltage (VDD) 2.4 5 6 V Storage temperature -25 - 125 oCAmbient temperature with power applied 0 - 70 oCELECTRICAL CHARACTERISTICS (AT Ta=25, VDD=5V) Parameter Condition Min. Typ. Max.
9、 Unit VDD SUPPLY CURRENT IDD normal supply current EN=VDD, output no-load - 750 - uA IDD enable supply current EN=0V - 150 - uA BUILT-IN OSCILLATOR Internal Frequency f - 168 - KHz REFERENCE VOLTAGE Internal reference voltage (Vref) 1.16 1.2 1.24 V ERROR AMPLIFIER DC gain - 70 - dB Gain bandwidth -
10、350 - KHz Slew rate - 6 - V/us SOFT-START FUNCTION Source current (Iss) - 81 - uA Soft-start timing (Tss) C2=0.01uF - 110 - us OVER VOLTAGE PROTECTION AND DISABLE FUNTION Threshold voltage (Vovp) Vovp1.0V,over voltage protection0.9 1.0 1.1 V Debounce time (Tovp) 15( 1 / f ) 70 88 105 us OUTPUT DRIVE
11、R Output source current Voutb=4.6V - 5 - mA Output sink current Voutb=0.4V - 5 - mA Rise time Cload=1000pF - 600 - ns Fall time Cload=1000pF - 500 - ns OUTPUT DUTY RATIO Maximum duty ratio 82 87 92 新竹市科學工業園區工業東九路 24 號 2 樓 TEL:03-5780241 FAX:03-5794278.5770419 Page 3 of 5 偉詮電子股份有限公司偉詮電子股份有限公司 YKW-06
12、Preliminary release Rev. 0.30（20060118） TYPICAL REFERENCE APPLICATION INFORMATION 新竹市科學工業園區工業東九路 24 號 2 樓 TEL:03-5780241 FAX:03-5794278.5770419 Page 4 of 5 A. Over voltage protectionOVP pinOVPSS pinOUT pinB. EN pin functionVDDSS pinOUT pinTovpTssTssV1V refV refC. SS & BRT & FB pin functionRa=50KSSFBBRTVRR1IaVFB=Ia*R1ENOVP (Internal)L1D1C1VCCQ1VDDR2R3R1D2 R5C4SSOUTOVPGNDCOMPFBBRTVDD87651234 VRC2C3R4 C5偉詮電子股份有限公司偉詮電子股份有限公司 YKW-06 Preliminary release Rev. 0.30（20060118） 新竹市科學工業園區工業東九路 24 號 2 樓 TEL:03-5780241 FAX:03-5794278.5770419 Page 5 of 5 PACKAGE DIMENSION MSOP-8 DIP-8
