S8300 Linear LED Driver IC ◈ Description The S8300 is an integrated adjustable constant-current source, driving loads up to 600mA. The output current level can be adjusted via an external resistor(RFB). The integrated SHDN input of the S8300P permits LED brightness regulation by pulse width modulation (PWM), with the SHDN input, the LED brightness can be regulated via duty cycle. Also, SHDN low sets the S8300 in sleep mode, the SHDN pin also can be used as an enable input. This discrete integration technology eliminates individual components by combining them into a single package, which results in a significant reduction of both system cost and board space. ◈ Features • Supplies stable bias current for LEDs • LED drive current adjustable via single external resistor (Max 600mA) • Low Cost, Low External Parts Count • Halogen-Free Package is Available ◈ Pin Assignment & Description 8 1 Pin No Symbol Description 1 VCC Power Supply 2 SHDN Disable On/Off 3 GND Ground 4 N.C No connection 5 N.C No connection 6 N.C No connection 7 OUTPUT Open Collector Output 8 FB Feedback / 0.2V Reference Package : SOP-8 ◈ Ordering Information Package Type Device Name Marking SOP-8 S8300 S8300 KSD-I7F016-001 1 S8300 ◈ Absolute maximum ratings [Ta=25℃] Characteristic Symbol Rating Unit Power Supply Voltage VCC(MAX) 25 V Output Voltage VOUT(MAX) 25 V Output Sink Current IOUT(MAX) 600 mA Thermal Resistance Junction-Ambient Rth(j-a)* 156.3 ℃/W Power Dissipation PD* 0.8 W Operating Temperature Range Topr -40 ~ +85 ℃ Storage Temperature Range Tstg -55 ~ +125 ℃ 2 * : Mounted on a glass epoxy circuit board of50x50mm Pad dimension of 50mm ◈ Recommended operating conditions Characteristic Symbol Power Supply Voltage Rating Unit Min Max VCC 3 24 V Output Voltage VOUT 1.5 Vcc V Output Sink Current IOUT - 500 mA Shut Down Voltage SHDN -0.3 Vcc V ◈ Electrical Characteristics (Ta=25℃, unless otherwise noted.) Characteristic Symbol IQ Maximum IQ Leak Current Condition Min. Typ. Max. Unit VCC=3~24V, Iout=20mA, Vout=open - 8 12 mA Ileak Vcc=5V, Vout=24V - 0.1 1 µA VFB VCC=5V, Iout=10mA - 200 208 mV Dropout Voltage Vdrop VCC=5V, Iout=500mA - 0.5 1.5 V Line Regulation △VFB1 VCC=3V~24V, Iout=10mA - 2 10 mV Load Regulation △VFB2 VCC=5V, Iout=10mA~Iomax - 3 25 mV SHDN Voltage On Vdis on VCC=5V, Iout=10mA, Vout=Vcc 1.5 - - V SHDN Voltage Off Vdis off VCC=5V, Iout=10mA - - 0.5 V SHDN Pin Current Idis Vcc=5V, SHDN=5V 230 430 630 µA Short Circuit Current ISC RFB=0Ω - 1300 - mA - - 160 - ℃ Feedback Voltage Thermal Shutdown TTSD KSD-I7F016-001 2 S8300 ◈ Functional block diagram VCC OCP TSD Out + 0.2V SHDN FB GND ◈ Design Consideration 1) Calculation for RFB - RFB = 0.2V / ILED 2) Calculation for Vdrop - Vdrop = VCC – VLED 3) Calculation for Power Dissipation on the S8300P -PD1 = (Vdrop – VFB) x ILED -PD2 = VCC x IQ -PD(total) = PD1 + PD2 4) If does not use an Dimming function, connect SHDN Pin with the ground. 5) When Vcc uses to exceed 25V, Dimming functions the use is impossible. KSD-I7F016-001 3 S8300 ◈ Typical Applications <APP1. Constant Current LED Driver Circuit> <APP2. PWM Dimming LED Driver Circuit> <APP3. VAC Landscape Lighting Application Circuit> KSD-I7F016-001 4 S8300 ◈ Typical Applications <APP4. High Voltage Operation of S8300P (1) > <APP5. High Voltage Operation of S8300P (2) > For operation in excess of S8300 specified maximum voltage (VCC & VOUT) of 25V, one way is to connect a sufficient number of LEDs between the power supply voltage and the DC input of the VCC&VOUT such that the voltage seen at pin(VCC & VOUT)is less than 25V. That is to say, use additional LEDs to drop the voltage fed to the S8300 below its maximum rating, in the usual way. Refer to APP4,5 Note that the exact number of diodes required will depend on the supply voltage VCC and output voltage VOUT ,the voltage drops across the particular LEDs being used. (Red, Blue and White LEDs have different forward voltage drop.) Use enough LEDs such that voltage at pin(VCC & VOUT) of S8300 is < 25V ※ Caution : When VS uses to exceed 25V, Dimming functions the use is impossible. <APP6. Power Supply Where Separates Operation of S8300P > KSD-I7F016-001 5 S8300 ◈ Electrical Characteristic Curves Fig.2 Line Regulation vs TA 1.5 2.0 VCC = 5V Io = 10mA 2.0 Line Regulation- △VFB [mV] [%] 2.5 Feedbak Voltage Change - VFB Fig.1 VFB vs TA 1.0 0.5 0.0 -0.5 -1.0 -1.5 -2.0 -2.5 -60 -40 -20 0 20 40 60 80 △VCC=21V Io=10mA 1.9 1.7 1.6 1.4 1.3 1.1 1.0 0.8 0.7 0.5 -60 100 -40 -20 Ambient Temperature - TA [℃] 40 60 10.0 8.0 Quiescent Current - IQ [mA] VCC=5V △Iout=490mA 9.0 80 100 Fig.4 Quiescent Current vs TA Fig.3 Load Regulation vs TA Load Regulation- △VFB [mV] 20 Ambient Temperature - TA [℃] 10.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 Io=20mA Vo=Open 9.5 9.0 8.5 8.0 7.5 7.0 6.5 Vcc=3V Vcc=5V Vcc=24V 6.0 5.5 5.0 0.0 -60 -40 -20 0 20 40 60 80 -60 100 Ambient Temperature - TA [℃] -20 0 20 40 60 80 100 Fig.6 Output Current vs Supply Voltage 650 600 VCC=5V Io=500mA 630 -40 Ambient Temperature - TA [℃] Fig.5 Dropout Voltage vs TA RFB=0.4Ω TA=25℃ 550 610 Output Current [mA] Dropout Voltage- VDROP[mV] 0 590 570 550 530 510 490 500 450 400 350 300 250 200 150 100 470 50 450 0 -60 -40 -20 0 20 40 60 80 100 Ambient Temperature - TA [℃] 0 5 10 15 20 25 30 Supply Voltage - Vcc [V] KSD-I7F016-001 6 S8300 ◈ Electrical Characteristic Curves Fig.8 Short Circuit Current Fig.7 Dimming Curve 100 Fre.1kHz Fre.10KHz LED Current ratio [%] 90 Ch1► 80 Ch2► 70 60 50 40 30 20 10 Ch3► 0 0 10 20 30 40 50 60 70 80 90 100 SHDN : Duty Ratio(%) Ch1 : SHDN, 5V/Div Ch2 :VOUT, 5V/Div Ch3 : IOUT, 500mA/Div Power Dissipation - PD [mW] Fig.9 Power Dissipation vs TA Ambient Temperature - TA [℃] KSD-I7F016-001 7 S8300 SOP-8 Outline Dimension (mm) ※ Recommend PCB solder land KSD-I7F016-001 [Unit: mm] 8 S8300 The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSD-I7F016-001 9