ACT361 Rev 8, 14-Nov-12 High Performance ActivePSRTM Primary Switching Regulator The ACT361 ensures safe operation with complete protection against all fault conditions. Built-in protection circuitry is provided for output shortcircuit, output over-voltage, line under-voltage, and over temperature conditions. FEATURES • Patented Primary Side Regulation Technology • No Opto-Coupler The ACT361 ActivePSRTM is optimized for high performance, cost-sensitive applications, and utilizes Active-Semi’s proprietary primary-side feedback architecture to provide accurate constant voltage, constant current (CV/CC) regulation without the need of an opto-coupler or reference device. Integrated line and primary inductance compensation circuitry provides accurate constant current operation despite wide variations in line voltage and primary inductance. Integrated output cord resistance compensation further enhances output accuracy. The ACT361 achieves excellent regulation and transient response, yet requires less than 150mW of standby power. • Best-in-Class Constant Voltage, Constant Current Accuracy • • • • Low EMI Proprietary Fast Startup Circuit Built-in Soft-Start Circuit Integrated Line and Primary Inductance Compensation • Integrated Programmable Output Cord Resistance Compensation • Line Under-Voltage, Output Over-Voltage, Output Short-Circuit and Over-Temperature Protection The ACT361 is optimized for 2W to 7W applications. It is available in space-saving 6 pin SOT23-6 package. • Complies with all Global Energy Efficiency and CEC Average Efficiency Standards • Adjustable power from 2W to 7W • Minimum External Components • Tiny SOT23-6 Package Figure 1: Simplified Application Circuit APPLICATIONS INPUT • Chargers for Cell Phones, PDAs, MP3, OUTPUT Portable Media Players, DSCs, and Other Portable Devices and Appliances • RCC Adapter Replacements • Linear Adapter Replacements • Standby and Auxiliary Supplies VDD BD GENERAL DESCRIPTION ACT361 The ACT361 belongs to the high performance patented ActivePSRTM Family of Universal-input AC/DC off-line controllers for battery charger and adapter applications. It is designed for flyback topology working in discontinuous conduction mode (DCM). The ACT361 meets all of the global energy efficiency regulations (CEC, European Blue Angel, and US Energy Star standards) while using very few external components. Innovative PowerTM SW CS FB G -1- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE PINS PACKING METHOD TOP MARK ACT361US-T -40°C to 85°C SOT23-6 6 TAPE & REEL FSCR PIN CONFIGURATION 1 G 2 BD 3 FSCR SW 6 CS 5 FB 4 VDD SOT23-6 ACT361US-T PIN DESCRIPTIONS PIN NAME 1 SW 2 G 3 BD 4 VDD 5 FB Feedback Pin. Connect this pin to a resistor divider network from the auxiliary winding. 6 CS Current Sense Pin. Connect an external resistor (RCS) between this pin and ground to set peak current limit for the primary switch. The peak current limit is set by (0.396V × 0.9) / RCS. For more detailed information, see Application Information. Innovative PowerTM DESCRIPTION Switch Drive. Switch node for the external NPN transistor. Connect this pin to the external power NPN’s emitter. This pin also supplies current to VDD during startup. Ground. Base Drive. Base driver for the external NPN transistor. Power Supply. This pin provides bias power for the IC during startup and steady state operation. -2- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 ABSOLUTE MAXIMUM RATINGSc PARAMETER VALUE UNIT -0.3 to +28 V 100 mA -0.3 to +6 V Internally limited A Maximum Power Dissipation (derate 4.5mW/˚C above TA = 50˚C) 0.45 W Junction to Ambient Thermal Resistance (θJA) 220 ˚C/W Operating Junction Temperature -40 to 150 ˚C Storage Junction -55 to 150 ˚C 300 ˚C VDD, BD, SW to G Maximum Continuous VDD Current FB, CS to G Continuous SW Current Lead Temperature (Soldering, 10 sec) c: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VDD = 14V, VOUT = 5V, LP = 2.3mH, NP = 140, NS = 10, NA = 27, TA = 25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Supply VDD Turn-On Voltage VDDON VDD Rising from 0V 17.6 18.6 19.6 V VDD Turn-Off Voltage VDDOFF VDD Falling after Turn-on 5.25 5.5 5.75 V IDD VDD = 14V, after Turn-on 1 2 mA VDD = 14V, before Turn-on 25 45 µA 1 µA Supply Current Start Up Supply Current IDDST BD Current during Startup IBDST Internal Soft Startup Time 10 ms Oscillator Switching Frequency Maximum Switching Frequency fSW 100% VOUTCV @ full load 42 25% VOUTCV @ full load 21 FCLAMP 45 DMAX 70 Effective FB Voltage VFB 2.176 FB Leakage Current IFBLK Maximum Duty Cycle kHz 55 kHz 75 80 % 2.200 2.224 V 100 nA Feedback Output Cable Resistance Compensation Innovative PowerTM DVCOMP No RCORD between VDD and SW 0 RCORD = 300k 3 RCORD = 150k 6 RCORD = 75k 9 RCORD = 33k 12 -3- % www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 ELECTRICAL CHARACTERISTICS CONT’D (VDD = 14V, VOUT = 5V, LP = 2.3mH, NP = 140, NS = 10, NA = 27, TA = 25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 600 mA 412 mV Current Limit SW Current Limit Range ILIM CS Current Limit Threshold VCSLIM 100 tOFF_DELAY = 0 Leading Edge Blanking Time 380 396 200 300 ns 1.6 Ω Driver Outputs Switch ON-Resistance RON SW Off Leakage Current ISW = 50mA VSW = VDD = 22V 5 µA VDDON +4 V Protection VDD Latch-Off Voltage VDDON +2 VDDOVP VDDON +3 Thermal Shutdown Temperature 135 ˚C Thermal Hysteresis 20 ˚C 116 µA Line UVLO IFBUVLO FUNCTIONAL BLOCK DIAGRAM VDD BD SW REGULATOR ON & UVLO BASE DRIVER OTP REFERENCE OVP + - + - + 2.20V SIGNAL FILTER - FB LOGIC + CABLE COMPENSATION OSCILLATOR 0.4V - CURRENT SHAPING + G Innovative PowerTM CS -4- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 FUNCTIONAL DESCRIPTION increases to ramp up the switch current to bring the secondary output back to regulation. The output regulation voltage is determined by the following relationship: As shown in the Functional Block Diagram, to regulate the output voltage in CV (constant voltage) mode, the ACT361 compares the feedback voltage at FB pin to the internal reference and generates an error signal to the pre-amplifier. The error signal, after filtering out the switching transients and compensated with the internal compensation network, modulates the external NPN transistor peak current at CS pin with current mode PFWM (Pulse Frequency and Width Modulation) control. To regulate the output current in CC (constant current) mode, the oscillator frequency is modulated by the output voltage. ⎛ R VOUTCV = 2 .20V × ⎜⎜1 + FB1 R FB 2 ⎝ (1) where RFB1 (R8) and RFB2 (R9) are top and bottom feedback resistor, NS and NA are numbers of transformer secondary and auxiliary turns, and VD is the rectifier diode forward drop voltage at approximately 0.1A bias. SW is a driver output that drives the emitter of an external high voltage NPN transistor. This baseemitter-drive method makes the drive circuit the most efficient. Standby (No Load) Mode In no load standby mode, the ACT361 oscillator frequency is further reduced to a minimum frequency while the current pulse is reduced to a minimum level to minimize standby power. The actual minimum switching frequency is programmable with an output preload resistor. Fast Startup VDD is the power supply terminal for the ACT361. During startup, the ACT361 typically draws only 20μA supply current. The startup resistor from the rectified high voltage DC rail supplies current to the base of the NPN transistor. This results in an amplified emitter current to VDD through the SW pin via Active-Semi's proprietary fast-startup circuitry until it exceeds the VDDON threshold 19V. At this point, the ACT361 enters internal startup mode with the peak current limit ramping up in 10ms. After switching starts, the output voltage begins to rise. The VDD bypass capacitor must supply the ACT361 internal circuitry and the NPN base drive until the output voltage is high enough to sustain VDD through the auxiliary winding. The VDDOFF threshold is 5.5V; therefore, the voltage on the VDD capacitor must remain above 5.5V while the output is charging up. Loop Compensation The ACT361 integrates loop compensation circuitry for simplified application design, optimized transient response, and minimal external components. Output Cable Resistance Compensation The ACT361 provides programmable output cable resistance compensation during constant voltage regulation, monotonically adding an output voltage correction up to predetermined percentage at full power. There are four levels to program the output cable compensation by connecting a resistor (R4 in Figure 6) from the SW pin to VDD pin. The percentage at full power is programmable to be 3%, 6%, 9% or 12%, and by using a resistor value of 300k, 150k, 75k or 33k respectively. If there is no resistor connection, there is no cord compensation. Constant Voltage (CV) Mode Operation This feature allows for better output voltage accuracy by compensating for the output voltage droop due to the output cable resistance. In constant voltage operation, the ACT361 captures the auxiliary flyback signal at FB pin through a resistor divider network R8 and R9 in Figure 6. The signal at FB pin is pre-amplified against the internal reference voltage, and the secondary side output voltage is extracted based on Active-Semi's proprietary filter architecture. Constant Current (CC) Mode Operation When the secondary output current reaches a level set by the internal current limiting circuit, the ACT361 enters current limit condition and causes the secondary output voltage to drop. As the output voltage decreases, so does the flyback voltage in a proportional manner. An internal current shaping circuitry adjusts the switching frequency based on the flyback voltage so that the transferred power remains proportional to the output voltage, resulting This error signal is then amplified by the internal error amplifier. When the secondary output voltage is above regulation, the error amplifier output voltage decreases to reduce the switch current. When the secondary output voltage is below regulation, the error amplifier output voltage Innovative PowerTM ⎞ NS ⎟⎟ × − VD ⎠ NA -5- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 FUNCTIONAL DESCRIPTION CONT’D in a constant secondary side output current profile. The energy transferred to the output during each switching cycle is ½(LP × ILIM2) × η, where LP is the transformer primary inductance, ILIM is the primary peak current, and η is the conversion efficiency. From this formula, the constant output current can be derived: 2 IOUTCC = ⎛ 0.396V × 0.9 ⎞ ⎛ η × fSW 1 ⎟⎟ × ⎜⎜ × LP × ⎜⎜ 2 RCS ⎝ ⎠ ⎝ VOUTCV ⎞ ⎟⎟ ⎠ die temperature. The typical over temperature threshold is 135°C with 20°C hysteresis. When the die temperature rises above this threshold the ACT361 is disabled until the die temperature falls by 20°C, at which point the ACT361 is re-enabled. TYPICAL APPLICATION Design Example (2) The design example below gives the procedure for a DCM flyback converter using the ACT361. Refer to Application Circuit in Figure 6, the design for a charger application starts with the following specification: where fSW is the switching frequency and VOUTCV is the nominal secondary output voltage. The constant current operation typically extends down to lower than 40% of nominal output voltage regulation. Input Voltage Range Primary Inductance Compensation The ACT361 integrates a built-in proprietary (patent-pending) primary inductance compensation circuit to maintain constant current regulation despite variations in transformer manufacturing. The compensated range is ±7%. Primary Inductor Current Limit Compensation 3.5W Output Voltage, VOUTCV 5.0V Full Load Current, IOUTFL 0.7A OCP Current, IOUTMAX 0.9A Transformer Efficiency, ηxfm 0.9 System Efficiency CC, ηsystem 0.69 System Efficiency CV, η 0.7 The operation for the circuit shown in Figure 6 is as follows: the rectifier bridge D1−D4 and the capacitor C1/C2 convert the AC line voltage to DC. This voltage supplies the primary winding of the transformer T1 and the startup resistor R1/R2. The primary power current path is formed by the transformer’s primary winding, the NPN transistor, the ACT361 internal MOSFET and the current sense resistor R7. The network consisting of capacitor C3 and diode D5 provides a VDD supply voltage for ACT361 from the auxiliary winding of the transformer. C3 is the decoupling capacitor of the supply voltage and energy storage component for startup. The diode D7 and the capacitor C7 rectifies and filters the output voltage. The resistor divider consisting of R8 and R9 programs the output voltage. The ACT361 integrates a primary inductor peak current limit compensation circuit to achieve constant input power over line and load ranges. Protection The ACT361 incorporates multiple protection functions including over-voltage, over-current and over-temperature. Output Short Circuit Protection When the secondary side output is short circuited, the ACT361 enters hiccup mode operation. In this condition, the VDD voltage drops below the VDDOFF threshold and the auxiliary supply voltage collapses. This turns off the ACT361 and causes it to restart. This hiccup behavior continues until the short circuit is removed. The minimum and maximum DC input voltages can be calculated: Output Over Voltage Protection The ACT361 includes output over-voltage protection circuitry, which shuts down the IC when the output voltage is 40% above the normal regulation voltage for 4 consecutive switching cycles. The ACT361 enters hiccup mode when an output over voltage fault is detected. VINDCMIN = = Over Temperature Shutdown 2V 2 ACMIN − 1 − tC ) 2 fL η × C IN 2 POUT ( -6- (3) 1 2 × 3 .5 ( − 3 . 5 ms ) 2 2 × 50 2 × 85 − ≈ 90 V 70 % × 2 × 4 .7 μ F VINDCMAX = 2 × VACMAX = 2 × 265 = 375V The thermal shutdown circuitry detects the ACT361 Innovative PowerTM 85VAC - 265VAC, 50/60Hz Output Power, PO (4) www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 TYPICAL APPLICATION CONT’D where η is the estimated circuit efficiency, fL is the line frequency, tC is the estimated rectifier conduction time, CIN is empirically selected to be 2 × 4.7µF electrolytic capacitors based on the 3µF/W rule of thumb. VINDCMAX × (VOUTCV + VDS ) 375 × ( 5 + 0.3 ) = = 73.5V VDREV − VOUTCV 40 × 0.8 − 5 NA = NA × N S = 2 .7 × 10 = 27 NS (13) 0.9 ×VCSLIM (IOUTFL + IOUTMAX ) ×VOUT 0.9 × 0.396 = (0.7 + 0.9) × 5 = 1.07R ⎛ 0.69 ⎞ 2.35 × 40 × ⎜ ⎟ ⎝ 0.9 ⎠ The voltage feedback resistors according to below equation: RFB1 = (14) are selected N A LP 27 2.35 × ×K = × × 126237 ≈ 53 .6 k NP RCS 140 1.07 (15) Where K is IC constant and K = 126237. R FB 2 = = (6) VFB ( VOUTCV + VDS ) NA − VFB NS R FB 1 (16) 2 .20 × 53 .6 = 9 .76 k ( 5 + 0 .3 ) × 2 .7 − 2 .20 When selecting the output capacitor, a low ESR electrolytic capacitor is recommended to minimize ripple from the current ripple. The approximate equation for the output capacitance value is given by: (7) COUT = The primary inductance of the transformer: VINDCMIN × D 90 × 35 % = = 2 .35 mH I PK × fSW 318 mA × 42 kHz (12) Where Fsw is the frequency at CC mode. The maximum input primary peak current at full load base on duty of 35%: LP = NS 1 × NP = × 140 = 10 NP 14 ⎛ ηsystem ⎞ ⎟⎟ LP × FSW × ⎜⎜ ⎝ η xfm ⎠ The maximum duty cycle is set to be 35% at low line voltage 85VAC and the circuit efficiency is estimated to be 70%. Then the full load input current is: 2 × IIN 2 × 55.56 = = 318 mA D 35% NS = RCS = where VDS is the Schottky diode forward voltage, VDREV is the maximum reverse voltage rating of the diode and VOUTCV is the output voltage. IPK = (11) The current sense resistance (RCS) determines the current limit value based on the following equation: (5) ×I V 5 × 0.7 IIN = OUTCV OUTPL = = 55.56 mA VINDCMIN × η 90 × 70% 2 .3 mH = 140 117 nH / T 2 The number of turns of secondary and auxiliary windings can be derived accordingly: When the transistor is turned off, the voltage on the transistor’s collector consists of the input voltage and the reflected voltage from the transformer’s secondary winding. There is a ringing on the rising top edge of the flyback voltage due to the leakage inductance of the transformer. This ringing is clamped by a RCD network if it is used. Design this clamped voltage as 50V below the breakdown of the NPN transistor. The flyback voltage has to be considered with selection of the maximum reverse voltage rating of secondary rectifier diode. If a 40V Schottky diode is used, then the flyback voltage can be calculated: VRO = LP = ALE NP = IOUTCC 0 .7 = = 333 μF fSW ×△VRIPPLE 42 kHz × 50 mV (17) A 470µF electrolytic capacitor is used to keep the ripple small. (8) Where fSW is the full load frequency at CV mode. PCB Layout Guideline The primary to secondary turns ratio NP/NS: NP V RO 74 = = = 14 NS V OUTCV + V DS 5 + 0 .3 (9) The auxiliary to secondary turns ratio NA/NS: NA VDD + VDA 14.5 + 0.7 = = = 2.7 NS VOUTCV + VDS + VCORD 5 + 0.30 + 0.3 (10) Good PCB layout is critical to have optimal performance. Decoupling capacitor (C3), current sense resistor (R7) and feedback resistor (R8/R9) should be placed close to VDD, CS and FB pins respectively. There are two main power path loops. One is formed by C1/C2, primary winding, NPN transistor and the ACT361. The other is the secondary winding, rectifier D7 and output capacitors (C7). Keep these loop areas as small as possible. Connect high current ground returns, the input capacitor ground lead, and the ACT361 G pin to a single point (star ground configuration). Where VDA is the diode forward voltage of the auxiliary side. An EE16 transformer gapped core with an effective inductance ALE of 117nH/T2 is selected. The number of turns of the primary winding is: Innovative PowerTM -7- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 TYPICAL APPLICATION CONT’D VFB Sampling Waveforms ACT361 senses the output voltage information through the VFB waveforms. Proper VFB waveforms are required for IC to operate in a stable status. To avoid mis-sampling, 1.38µs blanking time is added to blank the ringing period due to the leakage inductance and the circuit parasitic capacitance. Figure 2 is the recommended VFB waveform to guarantee the correct sampling point so that the output information can be sent back into the IC to do the appropriate control. Figure 2: 1.38µs Innovative PowerTM -8- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 Figure 3: Universal VAC Input, 5V/0.7A Output Charger L1 FR1 L T1 R1 D4 D1 VO R2 D3 D2 + C1 + C2 R10 D7 D5 R11 C7 + Q1 N GND R4 R8 BD R5 VDD SW ACT361 G FB CS R7 C3 R9 Table 1: ACT361 Bill of Materials ITEM REFERENCE 1 U1 2 C1, C2 DESCRIPTION QTY MANUFACTURER IC, ACT361US-T, SOT23-6 1 Active-Semi Capacitor, Electrolytic, 4.7µF/400V, 8 × 12mm 2 KSC 3 C3 Capacitor, Electrolytic, 4.7µF/35V, 5 × 11mm 1 POE 4 C7 Capacitor, Electrolytic, 470µF/10V, 8 × 12mm 1 KSC 5 D1-D4 Diode, Rectifier, 1000V/1A, 1N4007, DO-41 4 Good-Ark 6 D5 Diode, Ultra Fast, FR102,100V/1.0A, DO-41 1 Good-Ark 7 D7 Diode, Schottky, 40V/2A, SB240, DO-15 1 Good-Ark 8 L1 Axial Inductor, 1.5mH, 0410, DIP 1 Amode Tech 9 Q1 Transistor, NPN, 900V,1.5A, KSB13003AR, TO-92 1 Semi How 10 FR1 Fusible Resistor, 1W, 10Ω, 5% 1 TY-OHM 11 R1, R2 Chip Resistor, 5.1MΩ, 1206, 5% 2 TY-OHM 12 R4 Chip Resistor, 150k, 0805, 5% 1 TY-OHM 13 R5 Chip Resistor, 22Ω, 0603, 5% 1 TY-OHM 14 R7 Chip Resistor, 1.07Ω, 1206, 1% 1 TY-OHM 15 R8 Chip Resistor, 53.6k, 0805, 1% 1 TY-OHM 16 R9 Chip Resistor, 9.76k, 0805, 1% 1 TY-OHM 17 R10 Chip Resistor, 22Ω, 0805, 5% 1 TY-OHM 18 R11 Chip Resistor, 1.1k, 0805, 5% 1 TY-OHM 19 T1 Transformer, LP = 2.3mH±7%, EE16 1 Innovative PowerTM -9- www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 TYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 6, unless otherwise specified.) Average Efficiency vs. Output Power Efficiency vs. Output Power 230VAC Average Efficiency (%) Efficiency (%) 70 115VAC 60 50 ACT361-002 ACT361-001 80 80 70 60 50 40 30 20 40 25%Po 50%Po 75%Po 2.0 100%Po 3.5 Output Power (W) Output Power (W) Output Voltage and Current Characteristics Standby Power vs. Line Voltage 5.0 Output Voltage (V) 125 ACT361-004 5.5 ACT361-003 150 Standby Power (mW) 5.0 100 75 50 25 4.5 Low Limit 4.0 High Limit 3.5 3.0 85V 115V 230V 264V 2.5 2.0 1.5 0 Hiccup 1.0 85 115 230 0 264 Output Current Limit (mA) Output Voltage (V) 4.95 4.90 4.85 4.80 85V 115V 230V 264V 50 600 700 800 900 230V 780 760 115V 740 720 700 75 0 Temperature (°C) Innovative PowerTM 500 ACT361-006 5.00 25 400 800 ACT361-005 5.05 0 300 Output Current Limit vs. Temperature Output Voltage vs. Temperature 5.10 4.70 200 Output Current (mA) Line Voltage (VAC) 4.75 100 25 50 75 Temperature (°C) - 10 - www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 TYPICAL PERFORMANCE CHARACTERISTICS CONT’D (Circuit of Figure 6, unless otherwise specified.) Start Up Supply Current vs. Temperature VDD ON/OFF Voltage vs. Temperature VDDON 16.5 26 24 14.5 IDDST (µA) VDDON and VDDOFF (V) 18.5 ACT361-008 28 ACT361-007 20.5 12.5 10.5 22 20 18 8.5 VDDOFF 6.5 16 4.5 14 0 25 50 75 0 Temperature (°C) 50 75 Temperature (°C) Normalized ILIM vs. Temperature FB Voltage vs. Temperature 1.01 Normalized ILIM (mA) 2.20 ACT361-010 1.02 ACT361-009 2.25 VFB (V) 25 2.15 2.10 2.05 1.00 0.99 0.98 0.97 0.96 2.00 0.95 0 25 50 75 0 Temperature (°C) 50 75 Temperature (°C) Internal MOSFET RON vs. Temperature Max. Switching Frequency vs. Temperature 2.4 49.8 49.0 ACT361-012 50.6 ACT361-011 2.0 1.6 RON (Ω) Maximum Switching Frequency (kHz) 25 48.2 47.4 1.2 0.8 46.6 0.4 45.8 45.0 0 25 50 0.0 75 Temperature (°C) Innovative PowerTM 0 25 50 75 Temperature (°C) - 11 - www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 TYPICAL PERFORMANCE CHARACTERISTICS CONT’D (Circuit of Figure 6, unless otherwise specified.) Output Cable Resistance Compensation vs. Output Current Output Current Limit vs. RCS 4.75 800 115V 600 No RCORD 4.50 4.25 4.00 230V 400 RCORD = 162kΩ 5.00 VO (V) Output Current Limit (mA) 1000 VIN = 115V ACT361-014 5.25 ACT361-013 1200 1.5M AWG26 Cable 3.75 3.50 200 0.5 1.0 1.5 0 2.0 100 200 300 400 500 600 700 800 Output Current (mA) Current Sense Resistance (Ω) Switching Waveform at 115VAC (Full Load) Switching Waveform at 230VAC (Full Load) ACT361-016 ACT361-015 CH1 CH1 CH2 CH2 CH1: VCOLLECTOR, 200V/div CH2: ICOLLECTOR, 100mA/div TIME: 4.00µs/div CH1: VCOLLECTOR, 200V/div CH2: ICOLLECTOR, 100mA/div TIME: 4.00µs/div Output Voltage Ripple at 115VAC (Full Load) Startup at 115VAC (Full Load) ACT361-018 ACT361-017 CH1 CH1 CH2 CH1: VIN(AC), 100V/div CH2: VOUT, 1V/div TIME: 40.0ms/div CH1: 50.0mV/div TIME: 4.00ms/div Innovative PowerTM - 12 - www.active-semi.com Copyright © 2012 Active-Semi, Inc. ACT361 Rev 8, 14-Nov-12 PACKAGE OUTLINE SOT23-6 PACKAGE OUTLINE AND DIMENSIONS D θ 0.2 SYMBOL E E1 c e A A1 A2 e1 DIMENSION IN MILLIMETERS DIMENSION IN INCHES MIN MAX MIN MAX A - 1.450 - 0.057 A1 0.000 0.150 0.000 0.006 A2 0.900 1.300 0.035 0.051 b 0.300 0.500 0.012 0.020 c 0.080 0.220 0.003 0.009 L b D 2.900 BSC 0.114 BSC E 1.600 BSC 0.063 BSC E1 2.800 BSC 0.110 BSC e 0.950 BSC 0.037 BSC e1 1.900 BSC 0.075 BSC L 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8° Active-Semi, Inc. reserves the right to modify the circuitry or specifications without notice. Users should evaluate each product to make sure that it is suitable for their applications. Active-Semi products are not intended or authorized for use as critical components in life-support devices or systems. Active-Semi, Inc. does not assume any liability arising out of the use of any product or circuit described in this datasheet, nor does it convey any patent license. Active-Semi and its logo are trademarks of Active-Semi, Inc. For more information on this and other products, contact [email protected] or visit http://www.active-semi.com. is a registered trademark of Active-Semi. Innovative PowerTM - 13 - www.active-semi.com Copyright © 2012 Active-Semi, Inc.