Power Supply IC for Microcomputer LC201S General Descriptions Package LC201S is the power supply IC for microcomputer of lighting, incorporating a start up circuit and a linear regulator. There are two outputs. The output voltage of OUT1 can be switched 9 V or 20 V. The output voltage of OUT2 is 5V. The product achieves high cost-performance power supply systems with few external components for microcomputer. SOP8 Not to scale Features Built-in startup circuit Power dissipation of the startup circuit is zero. (When the power of IC is supplied from external power supply) OUT1 pin voltage is selectable from 9 V or 20 V by SL pin voltage. (When the power of IC is supplied from internal startup circuit) Applications Various lighting fixtures Fluorescent lamp, ceiling light, street light and down light, etc. Electronic equipment with microcomputer OUT2 voltage is fixed to 5V Current Sink Function (In case OUT1 pin voltage decreases, OUT2 pin is fixed to Low state) Typical Application Circuit BR1 VAC 8 C1 ST 7 6 5 NC NC OUT1 U1 LC201S C2 GND SL SINK OUT2 1 2 3 R1 LC201S-DS Rev.1.2 Mar. 30, 2016 Micro computer 4 C3 SANKEN ELECTRIC CO.,LTD. http://www.sanken-ele.co.jp/en/ 1 LC201S CONTENTS General Descriptions ----------------------------------------------------------------------- 1 1. Absolute Maximum Ratings --------------------------------------------------------- 3 2. Electrical Characteristics ------------------------------------------------------------ 3 3. Functional Block Diagram ----------------------------------------------------------- 4 4. Pin Configuration Definitions ------------------------------------------------------- 4 5. Typical Application Circuit --------------------------------------------------------- 5 6. Package Outline ------------------------------------------------------------------------ 6 7. Marking Diagram --------------------------------------------------------------------- 6 8. Operational Description -------------------------------------------------------------- 7 8.1 Basic Operation ------------------------------------------------------------------ 7 8.2 Startup Operation --------------------------------------------------------------- 7 8.3 Current Sink Function --------------------------------------------------------- 8 9. Design Notes ---------------------------------------------------------------------------- 9 10. Performance Curves ----------------------------------------------------------------- 10 IMPORTANT NOTES ------------------------------------------------------------------- 13 LC201S-DS Rev.1.2 Mar. 30, 2016 SANKEN ELECTRIC CO.,LTD. 2 LC201S 1. Absolute Maximum Ratings The polarity value for current specifies a sink as "+," and a source as "−," referencing the IC. Unless otherwise specified TA = 25 °C Characteristic ST Pin Voltage OUT1 Pin Voltage OUT2 Pin Voltage SL Pin Voltage SINK Pin Voltage SINK Pin Sink Current OUT1 Pin Sink Current OUT2 Pin Sink Current (without auxiliary winding) OUT22 Pin Sink Current (with auxiliary winding) Operating Ambient Temperature Storage Temperature Junction Temperature Symbol VST VOUT1 VOUT2 VSL VSINK ISINK IOUT1 Test Conditions 1－8 1－5 1－4 1－2 1－3 1－3 1－5 Pins Rating 600 35 − 0.3 to 7.0 − 0.3 to 5.0 20 1.2 1.5 Units V V V V V mA mA IOUT2-N 1－4 1.5 mA IOUT2-A 1－4 10 mA Top Tstg Tj ― ― ― − 55 to 125 − 55 to 125 150 °C °C °C 2. Electrical Characteristics The polarity value for current specifies a sink as "+," and a source as "−," referencing the IC. Unless otherwise specified, TA = 25 °C Characteristic Symbol Test Conditions Power Supply Startup Operation OUT2 Pin Output Voltage VOUT2 VST = 60 V SL Pin High Threshold Voltage VSL(H) SL Pin Low Threshold Voltage VSL(L) Startup Current IST In case SL pin is Open Startup Circuit Operation VSTON(OP) Voltage OUT1 Pin Output Voltage VOUT1(OP) VST = 60 V UVLO Operation Stop Voltage VUVH(OP) UVLO Operation Start Voltage VUVL(OP) In case SL pin is GND Startup Circuit Operation VSTON(SH) Voltage OUT1 Pin Output Voltage VOUT1(SH) VST = 60 V UVLO Operation Stop Voltage VUVH(SH) UVLO Operation Start Voltage VUVL(SH) Thermal Characteristics Junction to Case Thermal * θj-C Resistance * Case temperature (TC) measured at the center of the case top surface LC201S-DS Rev.1.2 Mar. 30, 2016 SANKEN ELECTRIC CO.,LTD. Pins 1–4 Rating M i n . Typ. Max. Units 位 1－2 1－2 1–5 4.5 1.5 ― 1.5 5.0 ― ― ― 5.5 ― 0.5 6.5 V V V mA 1–8 13 17 21 V 1–5 1–3 1–3 8.0 6.5 6.0 9.0 8.0 7.5 10.0 9.5 9.0 V V V 1–8 26 30 34 V 1–5 1–3 1–3 18 15 13 20 18 16 22 21 19 V V V － － － 45 °C/W 3 LC201S 3. Functional Block Diagram ST OUT1 8 5 Startup Linear Regulator 2 4 OUT2 3 SL Input SINK UVLO 1 GND 4. Pin Configuration Definitions Pin Name 1 GND GND 1 8 ST 2 SL SL 2 7 (NC) 3 SINK SINK 3 6 4 OUT2 (NC) OUT2 4 5 OUT1 5 OUT1 6 (NC) 7 (NC) 8 ST LC201S-DS Rev.1.2 Mar. 30, 2016 Descriptions Ground Switch of OUT1 pin voltage Sink pin to flow sink current at low input voltage condition. Connect to OUT2 pin. 5 V (Typ.) output 9 V (Typ.) or 20 V (Typ.) output. When auxiliary winding is connected to OUT1 pin, OUT1 pin is power supply of the control circuit. No function. In order to maintain the distance between high voltage pin and low voltage pin, keep this pin open. Startup current input. When auxiliary winding is not connected to OUT1 pin, ST pin is power supply of the control circuit. SANKEN ELECTRIC CO.,LTD. 4 LC201S 5. Typical Application Circuit Figure 5-1 shows the standalone LC201S operation circuit. The power is supplied to IC via ST pin. Figure 5-2 shows the LC201S circuit with external power supply. The power is supplied to IC from auxiliary winding of external power supply via OUT1 pin. BR1 VAC 8 ST C1 7 6 5 NC NC OUT1 U1 LC201S C2 GND SL SINK OUT2 1 2 3 4 R1 Microcomputer C3 Figure 5-1 Standalone LC201S circuit Power supply for lighting Light BR1 VAC D1 C1 8 7 6 5 ST NC NC OUT1 U1 LC201S C2 GND SL SINK OUT2 1 2 3 4 R1 Microcomputer C3 Figure 5-2 LC201 circuit with external power supply. LC201S-DS Rev.1.2 Mar. 30, 2016 SANKEN ELECTRIC CO.,LTD. 5 LC201S 6. Package Outline SOP8 NOTES: 1) Drawing is not to scale. 2) Pb-free. Device composition compliant with the RoHS directive 7. Marking Diagram 8 LC201S Part Number SKYMD Lot Number 1 Y is the last digit of the year (0 to 9) M is the month (1 to 9, O, N or D) D is a period of days (1 to 3) : 1 : 1st to 10th 2 : 11th to 20th 3 : 21st to 31st Sanken Control Number LC201S-DS Rev.1.2 Mar. 30, 2016 SANKEN ELECTRIC CO.,LTD. 6 LC201S 8. Operational Description All of the parameter values used in these descriptions are typical values, unless they are specified as minimum or maximum. With regard to current direction, "+" indicates sink current (toward the IC) and "–" indicates source current (from the IC). 8.2 Startup Operation Figure 8-2 shows ST pin peripheral circuit. BR1 VAC C1 8.1 Basic Operation U1 During the startup process, power of IC is spplied via ST pin. After startup, OUT1 pin can be used as power supply pin instead of ST pin. In this case the OUT1 pin is connected to the auxiliary winding of external power supply. IST 8 ST Startup UVLO OUT1 Linier Regulator There are two output pins, OUT1 and OUT2. OUT1 pin voltage is selectable from 9V or 20V. OUT2 pin is fixed to 5V. 5 4 OUT2 C2 C3 Figure 8-2 ST pin peripheral circuit In case the power supply after startup of IC is supplied from ST pin, the output voltage of OUT1 pin can be changed as shown in Table 8-1 by the connection method of SL pin as shown in Figure 8-1 (SL pin is open or short with GND pin). Table 8-1 Relationship between the state of SL pin and the output voltage of OUT1 pin SL = Open SL = GND Parameter (VSL ≥ 1.5 V) (VSL ≤ 0.5 V) OUT1 pin output 9V 20 V voltage, VOUT1 In case the power supply after startup of IC changes over to the supply from the external power supply, the OUT1 pin after startup of IC is applied to setup voltage of external power supply. Output voltage of OUT2 pin is 5V constant without relation of the state of SL pin and the supply way of power supply of IC. BR1 VAC C1 U1 When ST pin voltage increases to Startup Circuit Operation Voltage, VSTON, the internal startup circuit starts operation, and the C2 connected to OUT1 pin is charged by Startup Current, IST (about 4 mA). After that, when OUT1 pin voltage increases to UVLO Operation Stop Voltage, VUVH, the OUT2 pin outputs the voltage of 5 V. When ST pin voltage decreases and OUT1 pin voltage decreases to UVLO Operation Start Voltage, VUVL, OUT2 pin voltage becomes about 0 V. The value of VSTON, VUVH and VUVL depend on the configuration of SL pin as shown in Table 8-2. Table 8-2 Relationship between SL pin and the function of OUT1 pin Parameter Startup Circuit Operation Voltage, VSTON UVLO Operation Stop Voltage, VUVH UVLO Operation Start Voltage, VUVL SL = Open SL = GND 17 V 30 V 8.0 V 18.0V 7.5 V 16.0V 8 ST 2 SL Input 5 UVLO VSL 1 Startup OUT1 The startup time until OUT2 pin voltage becomes 5 V depends on capacitance of C2. Figure 8-3 shows reference value of startup time as a function of C2 value. C2 5V Linier Regulator GND 9V/20V 4 OUT2 C3 Figure 8-1 SL pin peripheral circuit LC201S-DS Rev.1.2 Mar. 30, 2016 SANKEN ELECTRIC CO.,LTD. 7 LC201S input voltage range and output load range of the power supply. (1) V V 35V 1 Startup time (s) UVH OUT1(D) Where, VUVH is UVLO Operation Stop Voltage. VUVH depends on the setting of SL pin (refer to Table 8-2). 0.1 The diode D2 should be a fast recovery diode since a high frequency switching current flows to D2. 0.01 8.3 Current Sink Function SL=Open SL=0V 0.001 1 10 100 When the output voltage of OUT2 pin is OFF, the Current Sink Function prevents the output voltage of OUT2 pin from varying by external factor. When this function is used, SINK pin is connected to OUT2 pin as shown in Figure 8-5. Capacitance of C2 (μF) Figure 8-3 The reference startup time of OUT2 pin After startup, there is two way of suppplying power to IC. In case the power of IC continues to be supplied via ST pin , OUT1 pin voltage becomes VOUT1 (9V or 20V refer to Table 8-1). In case the power of IC is supplied from external power supply, OUT1 pin is connected to the auxiliary winding of external power supply. Since the power supply pin can be switched from ST pin to OUT1 pin, the power dissipation of the startup circuit can be eliminated after startup process. External power supply BR1 VAC C1 U1 8 ST OUT1 D2 5 C2 GND P VD D 1 Figure 8-4 In case the power of IC is supplied from external power supply After external power supply starts, when the auxiliary winding voltage, VD, is lower than VOUT1, OUT1 pin voltage keeps VOUT1. When VD increases and OUT1 pin voltage becomes higher than VOUT1, the startup circuit of IC is cut automatically. Then OUT1 pin voltage becomes the rectified and smoothed VD voltage. The number of turns of auxiliary winding D is set such that OUT1 pin voltage, VOUT1(D), becomes within the range of Expression (1) in the specification of the LC201S-DS Rev.1.2 Mar. 30, 2016 U1 OUT1 5 OUT2 4 SINK 3 UVLO Linier Regulator QSI R1 ISINK GND 1 Figure 8-5 SINK pin peripheral circuit Figure 8-6 shows Current Sink Function operational waveforms. When OUT1 pin voltage decreases UVLO Operation Stop Voltage, VUVL, the output of OUT2 pin becomes Low state. At the same time, QSI turns on and the sink current flows into SINK pin. Thus the output of OUT2 pin is fixed Low state immediately. When OUT1 pin voltage increases to UVLO Operation Start Voltage, VUVH, or more, QSI turns off and OUT2 pin outputs VOUT2 = 5 V. The value of R1 connected between SINK pin and OUT2 pin should be selected considering the range of the absolute maximum ratings of SINK pin current. OUT1 pin voltage VUVL VUVH ST pin current ISINK OUT2 pin voltage ５V Figure 8-6 Current Sink Function operational waveforms. SANKEN ELECTRIC CO.,LTD. 8 LC201S 9. Design Notes PCB circuit trace design and component layout significantly affects operation, EMI noise, and power dissipation. Therefore, pay extra attention to these designs. Because the linear regulator has a positive thermal coefficient of RON, consider it when preparing a thermal design. Figure 9-1 shows the circuit design example. The input capacitor C1 and the output capacitor C2 and C3 are connected to each functional pin (ST pin, OUT1 pin and OUT2 pin) and GND pin as close as possible. VAC D1 BR1 OUT1 8 7 6 5 ST NC NC OUT1 U1 C1 LC201S C2 GND SL SINK OUT2 1 2 3 4 R1 OUT2 C3 Figure 9-1 The circuit design example LC201S-DS Rev.1.2 Mar. 30, 2016 SANKEN ELECTRIC CO.,LTD. 9 LC201S 10. Performance Curves 10.1 Regulation Curves of OUT1 Pin Relationship between VST and VOUT1 (IOUT1 = 0 mA) 20.6 SL = Open SL = GND 9.2 VOUT1 [V] VOUT1 [V] 9.4 9.0 8.8 20.4 20.2 20.0 19.8 8.6 19.6 8.4 0 100 200 300 400 VST [V] 500 0 600 100 200 300 VST [V] 400 500 600 Relationship between VOUT1 and IOUT1 (VST = 60 V) 9.4 20.6 SL = GND 9.2 VOUT1 [V] VOUT1 [V] SL = Open 9.0 8.8 8.6 20.4 20.2 20.0 19.8 8.4 19.6 0 0.3 0.6 0.9 IOUT1 [mA] 1.2 1.5 0 0.3 0.6 0.9 IOUT1 [mA] 1.2 1.5 10.2 Regulation Curves of OUT2 Pin Relationship between VOUT1 and VOUT2 (IOUT2 = 0 mA) 5.6 SL = Open 5.4 VOUT2 [V] VOUT2 [V] 5.6 5.2 5.0 4.8 SL = GND 5.4 5.2 5.0 4.8 4.6 4.6 5 10 15 20 25 VOUT1 [V] 30 35 15 20 25 VOUT1 [V] 30 35 Relationship between VOUT2 and IOUT2 5.6 SL = Open 5.4 VOUT2 [V] VOUT2 [V] 5.6 5.2 5.0 4.8 SL = GND 5.4 5.2 5.0 4.8 4.6 4.6 0 2 LC201S-DS Rev.1.2 Mar. 30, 2016 4 6 IOUT2 [mA] 8 10 0 2 4 6 8 10 IOUT2 [mA] SANKEN ELECTRIC CO.,LTD. 10 LC201S 10.3 Typcal Operation Waveform Normal Operation Waveform AC 80 V (SL = GND) (Ch1: AC, Ch2: OUT1, Ch3: OUT2) AC 265 V (SL = GND) (Ch1: AC, Ch2: OUT1, Ch3: OUT2) Operation Waveform when Input Voltage is Varied AC 80 V→AC 265 V (SL = Open) AC 265V→AC 80 V (SL = Open) (Ch1: AC, Ch2: OUT1, Ch3: OUT2) (Ch1: AC, Ch2: OUT1, Ch3: OUT2) AC 80 V→AC 265 V (SL = GND) (Ch1: AC, Ch2: OUT1, Ch3: OUT2) LC201S-DS Rev.1.2 Mar. 30, 2016 AC 265V→AC 80 V (SL = GND) (Ch1: AC, Ch2: OUT1, Ch3: OUT2) SANKEN ELECTRIC CO.,LTD. 11 LC201S Operation Waveform when the Load of OUT2 Pin is Varied IOUT = 0 mA→10 mA (SL = Open) IOUT = 10 mA→0 mA (SL = Open) (Ch2: OUT1, Ch3: OUT2, Ch4: IOUT2) (Ch1: OUT1, Ch2: OUT1, Ch3: IOUT2) IOUT = 0 mA→10 mA (SL = GND) (Ch2: OUT1, Ch3: OUT2, Ch4: IOUT2) LC201S-DS Rev.1.2 Mar. 30, 2016 IOUT = 10 mA→0 mA (SL = GND) (Ch1: OUT1, Ch2: OUT1, Ch3:IOUT2) SANKEN ELECTRIC CO.,LTD. 12 LC201S IMPORTANT NOTES All data, illustrations, graphs, tables and any other information included in this document as to Sanken’s products listed herein (the “Sanken Products”) are current as of the date this document is issued. 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