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1 Macroblock 6~36 1A - (PWM) - (PWM) 1,024 3 LED 350mA12V 97% Hysteretic PFM 0.3Ω (UVLO)(Start-Up)(OCP) (TP) LED 6 PCB Mini Small Outline Package GMS : MSOP-8L-118mil Small Outline Package GD: SOP8L LED / 6 LED Hysteretic PFM (PWM) (PWM)(DC voltage controlled) 5 ~ %. IC (Start-Up) IC (UVLO) (TP)(OCP) LED IC MSOP-8L SOP-8L LED Macroblock, Inc Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 77, ROC. TEL: , FAX:

2 C IN : 10uF/50V, VISHAY, 293D106X9050D2TE3, D case Tantalum Capacitor. C OUT (Optional): 10uF/50V, VISHAY, 293D106X9050D2TE3, D case Tantalum Capacitor. C BP : 0.1uF/50V / X7R / SMD ceramic capacitor, Gildenconnections. C ADJ : 0.1uF/50V / X7R / SMD ceramic capacitor, Gildenconnections. R SEN : 0.14Ω ± 1%, 1206 SMD Resistor, VIKING L1: GANG SONG, GSDS106C2-680M. D1: ZOWIE, SSCD VIN SEN SW Bandgap VREF Regulator VDD UVLO UVLO TSD TSD - + PWMA 200K 1.65V K 50K + - TSD UVLO DIMD ADJ PWMD VDD k DIMD 1.5V OCP GND - 2 -

3 VIN 1 8 PWMA VIN 1 8 PWMA SEN 2 7 ADJ SEN 2 7 ADJ PWMD 3 Thermal Pad 6 GND PWMD 3 Thermal Pad 6 GND SW 4 5 GND SW 4 5 GND GMS (Top View) GD (Top View) Pin GND SW PWMD PWMA ADJ SEN VIN Thermal Pad. (PWMA)(PWM) (PWMA) (PWMA) GND* * PCB GND PCB - 3 -

4 IC V IN 0~40 V I OUT 1.2 A SW V SW -0.5~40 V I GND 1.2 A (, Ta=25 C)* ()* (, Ta=25 C)* GMS GD P D 3.62 W R th(j-a) C/W P D 3.13 W R th(j-a) 40 C/W T j, max 150** C IC T opr -40~+85 C IC T stg -55~+150 C *PCB76.2mm*114.3mmJEDEC JESD51 **IC IC IC 125 C PCB PCB - 4 -

5 V IN =12V V OUT =3.6V L1=68µH C IN= C OUT =10µF T A =25 C V IN V I IN V IN =6V~36V ma V SU V V UVLO V SEN V SENSE mv SEN V SENSE,HYS % Tpd ns MOS R ds(on) V IN =12V; (b) Ω * T ON,min ns * T OFF,min ns SW * D sw % Freq Max 40-0 khz * T SD C (Hysteresis)* T SD-HYS C PWMD PWMD V IH V V IL V PWMD PWM Duty PWMD PWMD : 1KHz, % 1 - (a) R PWMD k Ω ( PWMA, ADJ) PWMA V IH V V IL V PWMA PWM Duty PWMA PWMA : 1KHz, % 10 - R PWMA - K - Ω V ADJ.CLAMP : ADJ V V ADJ SWOFF : ADJ V * A * - 5 -

6 (a) (b) (c) - 6 -

7 V IN =6V~40V,, C IN =C OUT, T A =25 C, 1-LED V F =3.6V; 2-LED V F =7.2V; 3-LED V F =10.8; 4-LED V F =14.4V, 5-LED V F =18V, 6-LED V F =21.6V LED Efficiency(%) RSEN= LED 2-LEDs 3-LEDs 4-LEDs Efficiency(%) R SEN= LED 2-LEDs 3-LEDs 4-LEDs 5-LEDs 6-LEDs Efficiency(%) R SEN= LED 2-LEDs 3-LEDs 4-LEDs 5-LEDs 6-LEDs I OUT =1A I OUT =700mA I OUT =350mA Fig. 3 Fig. 4 Fig. 5 vs Efficiency(%) R SEN= VIN=40V Efficiency(%) R SEN= VIN=40V Efficiency(%) RSEN= VIN=40V I OUT =1A I OUT =700mA I OUT =350mA Fig. 6 Fig. 7 Fig. 8 LED R SEN=0.1 1-LED 2-LEDs 3-LEDs 4-LEDs R SEN= LED 2-LEDs 3-LEDs 4-LEDs 5-LEDs 6-LEDs RSEN= LED 2-LEDs 3-LEDs 4-LEDs 5-LEDs 6-LEDs I OUT =1A I OUT =700mA I OUT =350mA Fig. 9 Fig. 10 Fig

8 vs RSEN= VIN=40V RSEN= VIN=40V RSEN= VIN=40V I OUT =1A I OUT =700mA I OUT =350mA Fig. 12 Fig. 13 Fig LED RSEN=0.1 1-LED in Cascaded uh Output Current(m A) R SEN= LED in Cascaded uh R SEN= LED in Cascaded uh I OUT =1A I OUT =700mA I OUT =350mA Fig. 15 Fig. 16 Fig LED Outputcurrent(m A) R SEN=0.1 2-LED in Cascaded uh R SEN= LED in Cascaded uh Output Curretn(mA) R SEN= LED in Cascaded uh I OUT =1A I OUT =700mA I OUT =350mA Fig. 18 Fig. 19 Fig LED R SEN=0.1 3-LED in Cascaded uh R SEN= LED in Cascaded uh Output current(ma) RSEN= LED in Cascaded uh Input voltage(v) I OUT =1A I OUT =700mA I OUT =350mA Fig. 21 Fig. 22 Fig

9 vs R SEN= uh R SEN=0.14 uh RSEN=0.28 uh I OUT =1A I OUT =700mA I OUT =350mA Fig. 24 Fig. 25 Fig RSEN= uh RSEN= uh RSEN= I OUT =1A I OUT =700mA I OUT =350mA Fig. 27 Fig. 28 Fig. 29 uh RSEN= uh RSEN= uh RSEN= uh I OUT =1A I OUT =700mA I OUT =350mA Fig. 30 Fig. 31 Fig. 32 VIN=40V RSEN=0.1 Vin=40V uh RSEN=0.14 VIN=40V uh RSEN=0.28 VIN=40V uh I OUT =1A I OUT =700mA I OUT =350mA Fig. 33 Fig. 34 Fig

10 (buck converter) 1 Hysteretic PFM IC (load transient response) LED ±5% (PWMD) LED. (I OUT )(R SEN )I OUT R SEN V SEN =0.1V; R SEN =(V SEN /I OUT )=(0.1V/I OUT ); I OUT =(V SEN /R SEN )=(0.1V/R SEN ) ; R SEN SENV SEN (R SEN ) 0.1Ω 0mA R SEN R S L1 DCR MOSFET R ds(on) LED LED (R S ) LED (equivalent impedance) 36 IC 1.15 IC LED 37 V IN V SW V OUT I OUT 37 V IN =12V, V OUT = 3.2V, R SEN =0.28Ω

11 A. (PWMD) LED (PWM)PWMD PWMD = L ( 0.5V)MOSFET LED PWMD 38 (PWM) (a) PWMD (PWM) Output Current (ma) Output Current (ma) Steps Steps (a) 0~1024 (b) 0~ V IN, 5-LED, L=68µH

12 B. EMI (SNR : Signal-to-Noise Rejection Ratio) 1 PWMA(PWM) PWMA(PWM) LEDPWMDLED LED(PWM) PWMA C ADJ ADJ ( 1uF / 0805 ) (PWM) PWMA V SEN (a) PWMA(PWM) Output C urrent(m A ) Duty(%) Duty(%) Duty (11%~20%) Duty (20%~%)

13 Output current(ma) Duty(%) (d)700 Duty(11%~20%) Output C urrent(ma ) Duty(%) (e)700 Duty(20%~%) 39 PWMA (PWM) 1 ADJ ADJ LED C ADJ ( ): C ADJ V DC (a) ADJ Analog voltage(v) Analog voltage(0.2v~0.4v) Analog voltage(v) voltage(0.4v~1.5v)

14 Output C urrent(m A ) VIN= Analog voltage(v) Analog voltage(v) (d) 700 Analog voltage(0.2v~0.4v) (e)700 Analog voltage(0.4v~1.5v) 40 ADJ DC LED LED LED MOSFET LED 0mA 41 V SW LED V OUT I OUT 41 LED LED LED LEDMOSFET LED 42 V SW LED I OUT V IN V OUT

15 LED LEDIC 1.8A V IN LED 1.8A. I OUT 43 LED IC T X (165 C) IC 44 SW 135 C IC V IN V SW I OUT V OUT

16 SW f SW = = T T (1) OFF, min (1- D) 0.5 S or 1 1 f SW = = T T (2) S ON, min D ()/ ( / ) () EMI MBI KHz~1.0MHz LED (Ripple Current) LED LEDLED LED LEDLED LED 5% 20% L1 L1 > (V IN - V OUT - V SEN - (R ds(on) x I OUT )) x f SW D x I R ds(on) MOSFET V IN Ω D D=V OUT /V IN f SW I L I L =(1.15xI OUT ) (0.85xI OUT )=0.3xI OUT 1.5 (line/load regulation) L

17 EMI (Schottky Diode) (Flywheel Diode) D1 MOSFET Schottky diode Schottky diode Schottky Diode MOSFETC IN MOSFET MOSFET uF 1.5 VIN C I VIN PCB VIN GND 0.1uF ~ 1uF 1.5. IC. 1.3 ( ) LED LED LED

18 PCB PCB IC GND 5mm 3. IC GND IC 6. PCB R SEN IC VIN 7. IC VIN GND 8. R SEN IC VIN SEN 9. SW Schottky diode MOSFET 12. IC, IC 13. IC

19 (P D ) P D (max) = (T j,max T a ) / R th(j-a) Maximum Power Dissipation at Various Ambient Temperature Power Dissipation (W) GMS Type: Rth=34.53 C/W GD Type: Rth=40.0 C/W Safe Operation Area Ambient Temperature ( C)

20 Pb-free & Green * Pb-Free & Green" RoHS % (SnPb) % (SnPb) JEDEC J-STD-020C JEDEC J-STD-020C 245 o C 260 o C ( ) Temperature ( ) Average ramp-up rate= 0.7 /s 30s max Ramp-down 6 /s (max) 150 s max Peak Temperature 245 ~260 < 10s 50 Average ramp-up rate = 0.4 /s Average ramp-up rate= 3.3 /s Maximum peak temperature Recommended reflow profile JEDEC Acc.J-STD-020C Time (sec) Package Thickness Volume mm 3 <350 Volume mm Volume mm <1.6mm o C o C o C 1.6mm 2.5mm o C o C o C 2.5mm o C o C o C * Pb-free & Green Package

21 SYMBOL MIN. 8L NOM. MAX. D E e 0.65 BSC GMS GD :

22 IC GD (SOP-8L) MBIXXXX or MBIXXXX Part number ID number Digits G: Green and Pb-free GMS (MSOP-8L) XXXX Part number ID number Digits IC V1.00 A V1.01 A RoHS (g) GMS MSOP-8L-118mil g GD SOP8L g

23 - 23 -

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