MP103 EasyPowerTM Higher Power Offline Inductor-Less Regulator For Low Power Applications The Future of Analog IC Technology DESCRIPTION FEATURES The MP103 provides an easy and low cost ACDC solution for less than 1W applications. It is an off-line linear regulator that delivers good efficiency while generating little EMI noise. It provides an easy solution to step down the AC line voltage to a regulated DC voltage. This offline linear regulator replaces the conventional switching regulator, not needing a transformer or an inductor. Due to its simplicity, it offers an overall low BOM cost. • • • • • • • • • • • MP103 delivers nearly two times the output power than the MP100 or MP100L by charging its VB capacitor with an external bipolar transistor. MP103 maximizes efficiency by minimizing the voltage drop between VB and VOUT, while only charging VB when VIN is less than approximately 32V. The MP103 enables the overall system to meet standby power requirements. MP103 offers rich protections, such as Thermal Shutdown (TSD), Over Temperature Protection (OTP), VB Over Voltage Protection (OVP), VB Short to GND Protection, Over Load Protection (OLP), Short Circuit Protection (SCP), MP103 is available in the SOIC8E package. Universal AC Input (85Vac-305Vac) Inductor-less Less than 100mW standby power Excellent EMI Performance Lower BOM Cost Smart Control to Maximizes Efficiency Adjustable Output Voltage from 1.5V to 15V Good Line and Load Regulation Drives External BJT Short Circuit Protection External Programmable Over Temperature Protection (OTP) APPLICATIONS • • • Wall switches and dimmers AC/DC Power Supply for Wireless System, like ZigBee, Z-Wave Standby Power for General Off-Line Applications All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION 1400 1200 1000 800 600 400 200 0 85 115 145 175 205 235 265 295 MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 1 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR ORDERING INFORMATION Part Number* MP103GN Package SOIC8E Top Marking MP103 * For Tape & Reel, add suffix –Z (e.g. MP103GN–Z); PACKAGE REFERENCE TOP VIEW RT 1 8 VIN GND 2 7 NC FB 3 6 DR VOUT 4 5 VB EXPOSED PAD ON BACK SIDE ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VIN ............................................. -0.7V to 700V VOUT ............................................ -0.3V to 15V VB.................................................. -0.3V to 35V DR ................................................. -0.3V to 30V FB................................................. -0.3V to 6.5V RT……………………………………-0.3V to 6.5V (2) Continuous Power Dissipation (TA = +25°C) SOIC8E .....................................................2.5W Junction Temperature............................. 150 oC Lead Temperature .................................. 260 oC Storage Temperature............. -55 oC to +150 oC ESD Capability Human Body Mode ………2kV SOIC8E Recommended Operating Conditions (3) (4) θJA θJC 50 ..... 10 °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. 50/60Hz AC RMS Voltage ............. 85V to 305V VB...................................................... 8V to 30V Operating Junction Temp TJ .... -40°C to +150°C MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 2 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR ELECTRICAL CHARACTERISTICS TA = -40°C to +125 °C, CFB=100pF, COUT=2.2μF, CVB=4.7μF, unless otherwise noted. Parameter Symbol Condition Min Typ Max Units 85 36 V μA V VIN Section Input Voltage Input Supply Current (Quiescent) Input Voltage Slow Threshold Input Voltage Slow Threshold Hysteresis Input Voltage Fast Threshold Input Voltage Hysteresis Fast Threshold VIN IINQC VINTHS 650 VIN= 90V & VB=0V, No load VIN Rising 30.5 VINTHS_HYS VINTHF 48 32.75 3.2 VIN Rising 66 VINTHF_HYS 71 V 83 5.7 V V VB Section VB Peak Voltage Limit VBPKLMT VOUT=5V 13.0 13.75 14.5 V VOUT=12V 19.8 21.0 22.2 V VOUT=5V 700 mV VOUT=12V 830 mV VB Peak Voltage Hysteresis VBPKLMT_HYS VB Under Voltage Lock Out VBUVLO 6.6 7.6 8.6 V VB Output Enable Threshold VBTHOUT 13.5 15.25 17 V 0.74 1.65 mA VB Supply Current (Quiescent) Active Bleeder ON Active Bleeder ON Hysteresis VBQC VBBLDON VBBLDON_HYS VB=30V VOUT=5V 11.0 12.25 13.5 V VOUT=12V 18.0 19.25 20.5 V VOUT=5V VOUT=12V o o TA= -40 C to 25 C Active Bleeder Current IBBLD o 350 o TA= 25 C to 85 C o o TA= 85 C to 125 C 600 mV 700 mV 470 μA 530 μA 683 850 μA 165 14.8 200 19 2.7 2.15 235 28 mA mA mA/μs mA/μs 11.7 12.1 50 170 0.04 0.14 12.5 V mA mA % % DR Section Driver Current Startup Driver Current Base Current Rise Rate Base Current Fall Rate VOUT Section VOUT Regulated Voltage (6) Output Current Capability Output Current Limit (7) Line Regulation (8) Load Regulation MP103 Rev. 1.01 1/23/2014 IDR VB> VBTHOUT IDRSTARTUP VB< VBTHOUT (5) IDRRISERATE (5) IDRFALLRATE VOUT IOUT IOUTLMT VAC=300rms, β=10,IDR=200mA VB=15V VB=13V to 30V, IOUT=100μA VB=30V, IOUT=100μA to 40mA www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 230 3 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR ELECTRICAL CHARACTERISTICS (5) (continued) TA = -40°C to +125°C, CFB=100pF, COUT=2.2μF, CVB=4.7μF, unless otherwise noted. Parameter Symbol (9) Condition Min Typ Max Units Dropout Voltage VDROP VB=20V,IOUT=40mA 0.55 V Ground Pin Current (10) PSRR FB Section IG PSRR VB=20V,IOUT=40mA 10~60kHz,CIN=1μF,COUT=4.7μF 1.31 <60 mA dB Reference Voltage VFBREF 1.204 1.235 1.266 V 64 77 90 μA 0.85 V RT Section Output Current of RT Pin RT Low Threshold Voltage IRT VRTTHL RT Threshold Voltage VRTTH_HYS Hysteresis RT Pin Open Voltage VRTOPEN Thermal Shutdown Thermal Shutdown Threshold Thermal Shutdown Threshold Hysteresis (11) RI=100kΩ 0.75 60 5.3 5.8 mV 6.3 V TSD 160 ºC TSD_HYS 20 ºC Notes: 5) Took the linear region (Current) measure Time1 at 20% and Time2 at 80% to calculate the base current rise and fall rate. 6) Evaluate on EVB. 7) Line Regulation = (VOUT @ VB=30V, 100uA load - VOUT @ VB=13V, 100uA load) / 12V * 100. 8) Load Regulation = (VOUT @ VB=30V, 40mA load - VOUT @ VB=30V,100uA load) / 12V * 100. 9) The dropout voltage is defined as VB -VOUT. 10) Guarantee by design. 11) Or force 5V and 0.5V on RT, then measure RT current. MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 4 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR TYPICAL CHARACTERISTICS 60 850 35 50 820 34 40 790 33 30 760 32 20 730 31 10 -50 -25 0 25 50 75 100 125 150 700 -50 -25 0 25 50 75 100 125 150 30 -50 -25 0 78 21 205 77 20 201 76 19 197 75 18 193 74 17 189 73 -50 -25 0 25 50 75 100 125 150 16 -50 -25 0 25 50 75 100 125 150 185 -50 -25 0 12.4 1.240 200 12.3 1.236 196 12.2 1.232 192 12.1 1.228 188 12.0 1.224 184 11.9 -50 -25 0 MP103 Rev. 1.01 1/23/2014 25 50 75 100 125 150 1.220 -50 -25 0 25 50 75 100 125 150 25 50 75 100 125 150 180 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 5 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR TYPICAL CHARACTERISTICS (continued) 1.5 80.000 0.88 1.4 78.000 0.86 1.3 76.000 0.84 1.2 74.000 0.82 1.1 72.000 0.8 1 0 10 20 30 40 50 LOAD CURRENT (mA) 60 1000 70.000 -50 -25 0 25 50 75 100 125 150 +0 0.78 -50 -25 0 25 50 75 100 125 150 T -20 100 -40 -60 10 -80 1 0 10 MP103 Rev. 1.01 1/23/2014 20 30 40 50 -100 10 20 50 200 1k 5k 20k 60k www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 6 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS Performance waveforms are tested on the evaluation board of the Design Example section. VIN=230VAC, VOUT=5V, IOUT=60mA, CVB=470μF/25V, TA=+25oC, unless otherwise noted. MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 7 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) Performance waveforms are tested on the evaluation board of the Design Example section. VIN=230VAC, VOUT=5V, IOUT=60mA, CVB=470μF/25V, TA=+25oC, unless otherwise noted. MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 8 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR PIN FUNCTIONS Pin # Name 1 RT 2 GND 3 FB 4 Description Temperature sensing input pin. Connected through a NTC resistor to GND. Once the voltage of the RT pin drops below a fixed limit of 0.8V, DR output and LDO will be disabled. Let this pin float if external temperature sensing function is not used. Ground. Output voltage feedback. Connect to a capacitor to VOUT to improve low dropout stability. Internally voltage divider set the output to be 12V. Connect to the tap of a resistor divider to adjust the output voltage. VOUT Output Voltage. 5 VB Connect a cap from this pin to GND to store the energy for the low drop-out stage. 6 DR BJT driver pin.The driver is capable of providing 0.2A source current to drive external BJT. 7 NC Not connected. 8 VIN Voltage input supply. Providing energy when the voltage falls within the charging window. Exposed Pad MP103 Rev. 1.01 1/23/2014 Connect to a large copper surface connected to GND to enhance thermal dissipation. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 9 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR BLOCK DIAGRAM RT VIN OTP Fault VOUT VB Active Bleeder VOUT GND VB Adaptive Charging Window Control BJT Driver FB NC DR Mode Select Startup/Steady State VOUT Voltage Regulator VB Figure 1: Functional Block Diagram MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 10 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR OPERATION MP103 employs a smart inductor-less regulator design to supply a regulated DC voltage from an AC input. A unique (patent pending) charge algorithm transfers charge from the AC line when the line voltage is below 32V to the VB capacitor (C1 in the typical application diagram). The VB capacitor is used as the charge reservoir for an internal LDO to regulate VOUT. There are two distinct modes of normal operation; startup and steady state. Startup At start up, all pins are at zero volts, and the AC line supplies power to VIN through the rectifier. An internal 19mA current source is enabled between VIN and DR. This current drives the base of an external bipolar transistor which charges the VB capacitor. This internal current source is only enabled when VIN is within its charging window, typically below 32V. This charging technique minimizes power loss during start up. During this start up condition, VB<15.25V, the output regulator is disabled. As long as VB < 15.25V, DR provides 19mA during its charging window which limits the output current if VB is shorted. When VB>15.25V, the output regulator is enabled, and MP103 enters its steady state mode. IDR VB Figure 2: Base Current vs. VB Voltage Steady state In steady state mode, DR current is increased to 200mA. Figure 2 depicts the relationship of the DR/base current to VB voltage. It is enabled during its charging window of VIN< 32V. This technique adaptively replenishes the VB capacitor charge which supplies power MP103 Rev. 1.01 1/23/2014 VIN VINTHS v2 v1 0 VB v3 v4 t IDR 0 t IIN 0 t1 t2 t3 t4 t5 t6 t [t1, t2]: At the time of t1, the voltage of VB and VIN is equal, then VIN is rising higher than VB, so there will be some charge current flowing into VB capacitor; At the time of t2, VIN reaches the slow turn-off threshold, the input current increased to its maximum value; IDRSTARTUP=19mA VBTHOUT Figure 3 depicts the steady state waveforms for better understanding. Figure 3: Steady State Waveform IDR=200mA VBUVLO to the LDO. This enables good efficiency. An internal comparator will limit the VB voltage. These are the VB peak thresholds listed in the electrical table. This further improves efficiency by optimally limiting the drop out voltage depending on VOUT. If VB falls below 7.6V, the regulator will be disabled, turning off the power supply. The EMI performance is enhanced by turning on and off the current source at a controlled rate. The following sections describe in much more detail the steady state operation. [t2, t3]: To benefit the EMI performance, MP103 will turn on and turn off the external BJT slowly with certain rate. At the time of t2, the driver reduces the driver current slowly to turn off the external BJT, at the time of t3, the external BJT is totally turned off; [t3, t4]: During this period, the VIN is higher than the slow turn-off threshold, the driver is turned off and no current flowing into VB capacitor, the VB capacitor provides the power to LDO for output load, at the time of t4, the voltage of VB drops from v2 to v3; www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 11 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR [t4, t5]: At the time of t4, VIN falls to the slow turn-on threshold; the driver current begins to slowly rise to turn on the external BJT, at the time of t5, the external BJT is fully on; [t5, t6]: As VIN falls, the charging current is decreased, and the VB voltage is increased by the charge current. At the time of t6, VIN falls to the value equal to VB voltage, there is no current flowing into VB capacitor; [t6, t1]: During this period, although the driver is active, since VIN is lower than VB voltage, so there is no charging current, the VB capacitor provide the power for the output load and the voltage drop from v4 to v1 at the time of t1; Adaptive Active Charging Window To minimize the power loss of BJT and LDO, MP103 integrates an adaptive active charging window control, which maintain the maximum voltage difference between VB and VOUT stay at a constant level, thus the VB peak voltage is limited related to VOUT. When VIN varies from high to low voltage into its charging window and the VB voltage is lower than VBPKLMT minus VBPKLMT＿HYS, then the driver will be turned on and VB capacitor will be charged up. If VB voltage is charged up to its peak limit VBPKLMT which is related with the output voltage, then the driver will be slowly turned off although VIN doesn’t reach its slow turn-off threshold. Figure 4 depicts the situation that VB reaches its peak limit when VIN is in its charging window. VIN VINTHS VBPKLMT VBPKLMT_HYS VB 0 t1 t2 t3 t4 t5 t6 During steady state mode, to guarantee the output get enough energy from input ports, active bleeder circuit is enabled whenever the VB voltage falls below VBBLDON. Besides, when the power supply is shut down, active bleeder circuit discharges the energy stored in parasitic capacitor to ensure the circuit can restart easily. Short Circuit Protection The output current is limited to 170mA (IOUTLMT) if the output is shorted to ground, which also decreases the VB voltage. When VB drops below 7.6V (VBUVLO), the LDO turns off. The input voltage then gradually charges VB up to 15.25V (VBTHOUT) to enable the LDO. When LDO turns on, the output current drops the VB voltage to 7.6V again. This process will continue until the output short condition ceases. Over Load Protection The VB and VOUT voltages will drop simultaneously if the output current exceeds its normal value. When the VB voltage falls to 7.6V (VBUVLO), the second stage LDO shuts down immediately. Then the input voltage charges VB to 15.25V (VBTHOUT) to enable the LDO. Due to the output current limit circuit, the maximum current is limited to 170mA (IOUTLMT) typically. t When VB is shorted to GND, the driver current will be reduced to 19mA (IDRSTARTUP) typically to decrease the power consumption of external BJT, thus the thermal damage of external BJT is prevented. t Figure 4: Adaptive Active Charging Window MP103 Rev. 1.01 1/23/2014 At start up, the active bleeder is always on to pull down the input voltage into its charging window to charge VB capacitor to its output enable threshold VBTHOUT at which moment the LDO is enabled. VB Short to GND Protection IIN 0 Due to the parasitic capacitor of VIN to GND, the input voltage may not fall into its charging window during normal operation. t IDR 0 Active Bleeder Circuit Over Temperature Protection An NTC resistor in series with a regular resistor can be connected between RT and GND for www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 12 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR ambient temperature sensing and protection. The value of the NTC resistor becomes lower when the ambient temperature rises. With the fixed internal current 80uA flowing through the resistors, the voltage of RT pin becomes lower at high temperature. When VRT is lower than VRTTHL （ typically 0.8V ） , then internal OTP circuit will be triggered and the BJT driver and LDO will be shut down immediately. When VRT is higher than VRTTHL plus VRTTH_HYS, then MP103 will restart. Thermal Shutdown Protection Accurate temperature protection prevents the chip from operating at exceedingly high temperatures. When the silicon die temperature exceeds 160oC, the whole chip shuts down. When the temperature falls below its lower threshold of 140 oC, the chip is enabled again. MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 13 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR APPLICATION INFROMATION COMPONENT SELECTION Setting the Output Voltage The output voltage is set to 12V by internal large feedback resistors. Typically, the internal upper and lower feedback resistor is 1.125MΩ and 125kΩ respectively. Adjust VOUT by choosing appropriate external feedback resistors. The recommended output voltage is between 1.5V and 15V. Defining the upper and lower feedback resistors as RUP and RLW respectively (refer to the picture in Typical Application section): RUP = RLW × ( VOUT − 1) 1.235 For the external resistors to dominate over the internal resistors, select relatively small values of RUP and RLW compared to the internal resistors. However, to minimize the load consumption, avoid very small external resistors. For most applications, choose RLW=10.2kΩ. To accurately set the output voltage, select RUP that can counter the internal upper-feedback resistor value of 1.125MΩ typically. The table below lists typical resistor values for different output voltages. Table 1: Resistors Selecting vs. Output Voltage Setting VOUT (V) 1.5 3.3 5 15 RUP (kΩ) 2.21 (1%) 16.9 (1%) 30.9 (1%) 121 (1%) RLW (kΩ) 10.2 (1%) 10.2 (1%) 10.2 (1%) 10.2 (1%) Selection of VB Capacitor The bypass capacitor on the VB pin needs to be sufficiently large to support sufficient energy. Calculate the capacitance (in μF) based on the following equation: CVB I ×τ = OUT s Vripple Where, IOUT is the output current (mA); τ s is based on the type of input rectifier—for example, τ s is 20ms for a half-wave rectifier, and 10ms for a full-bridge rectifier, Vripple is the voltage ripple on MP103 Rev. 1.01 1/23/2014 the VB capacitor—normally the ripple is limited to 2V to 3V. For best results, use a small ceramic capacitor and a large aluminum capacitor in parallel. Output Power Capability The following factors influence the MP103’s maximum output power: the input rectifier (full bridge or half-wave); the VB capacitor connected between VB and GND; the DC current gain and collector current of external BJT; the output voltage and the temperature-rise requirement of key components, which is relevant to different application environments. VIN VIN V AC V AC GND GND Full Bridge Rectifier Half-wave Rectifier Figure 5 depicts the relationship between the maximum output power and the VIN voltage when the output voltage is 12V, 5V and 3.3V respectively. The plots account for the full bridge rectifiers, the temperature rise of MP103 is less than 60 oC on the test board in 25 oC room temperature test. 1400 1200 1000 800 600 400 200 0 85 115 145 175 205 235 265 295 Figure 5: Output Power vs. Input Voltage www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 14 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR EMI To meet the relevant conducted emissions standard, slowly rise and fall the driver current is adopted to turn on and turn off the external BJT. Using this control method, a smaller X cap connected between the input ports will pass EMI with enough margins. Besides, a capacitor connected between DR and VB will further slow down the switching process of external BJT for better EMI performance. The larger value this capacitor used, the slower switching process and better EMI performance will be got, however, the more power losses will be introduced by this capacitor and the longer startup process will be, so it is a compromise to select the value of the capacitor connected. Generally, with a 100nF X cap connected to pass EMI, a 2.2uF ceramic capacitor for 12V output and 4.7uF ceramic capacitor for 5V output is a good candidate to get good compromise. Surge From its working principle, MP103 is working just when VIN falls into its charging window, so when surges happen at this moment, then a lot of energy will be absorbed by BJT and MP103 due to the slow turn off process. To protect them from damage, a fast turn off threshold (typically it is 71V) of VIN is set specially to shut down driver current quickly. Since there is no bulk capacitor to absorb AC line transients, MOV should be used to protect the IC to survive the surge test. Besides the value of fuse resistor will also affect the surge result, the larger value used, the better to facilitate to pass the surge test, but the more power consumption will be caused, in the meanwhile, the larger value of fuse resistor used, the easier to trigger its fast turn off threshold, so 10~20 Ω fuse resistor is recommended in real application. To pass 1kV surge test, 750V external BJT is recommended considering some margin, MP103 can pass 1kV surge test with an appropriate MOV such as TVR10431 connected between the line input ports. Besides, the thermal pad must be connected to the GND for better surge performance. MP103 Rev. 1.01 1/23/2014 PCB Layout Guide PCB layout is very important to achieve good regulation, ripple rejection, transient response and thermal performance. It is highly recommended to duplicate EVB layout for optimum performance. If change is necessary, please follow these guidelines and take figure 6 for reference. 1) Keep the trace from positive output rectifier to VIN as short and wide as possible. 2) Minimize the loop area formed by positive output of rectifier, emitter of external BJT and GND. 3) Minimize the loop area formed by VIN, collector of BJT, emitter of BJT. 4) Ensure all feedback connections are short and direct. Place the feedback resistors and compensation components as close to the chip as possible. 5) Place the NTC resistor as close to external BJT as possible for temperature detection and effective protection. 6) Output capacitor should be put close to the output terminal. 7) Connect the exposed pad with GND to a large copper area to improve thermal performance and long-term reliability. 8 VIN R3 RT 1 C5 7 NC L BD1 RF R1 Q1 RV CX R2 MP103 6 DR U1 GND FB R4 3 C3 VB RT1 2 C2 5 N GND R5 VOUT 4 C1 VOUT C4 GND GND www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 15 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR Design Example Below is a design example following the application guidelines for the specifications: Table 2: Design Example VIN VOUT IOUT 85Vac to 265Vac 5V 60mA The detailed application schematic is shown in Figure 7. The typical performance and circuit waveforms have been shown in the Typical Performance Characteristics section. For more device application, please refer to the related Evaluation Board Datasheets. Top Layer 1 8 2 7 3 6 4 5 Bottom Layer Figure 6: PCB Layout MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 16 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR TYPICAL APPLICATION CIRCUITS U1 8 7 BD1 MB6S RF 10/1W L 85~265VAC RV TVR10431 N CX1 100nF 275VAC Q1 3DD4802A 750V/1.5A R1 10 R2 2k 1206 C1 470uF 25V C2 4.7uF 10V RT 1 VIN GND 2 NC MP103 6 5 DR VB R3 10.2k C5 20pF 10V GND FB 3 VOUT 4 C3 1nF 16V RT1 10k R4 10.2k 1% R5 30.9k 1% VOUT C4 4.7uF 16V 5V/60mA GND GND Figure 7: Typical Application MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 17 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR FLOW CHART（12） Start VIN<29.55V N Turn On Active Bleeder N N VB>15.25V VB>VOUT+7.95V N N VB<VOUT+8.1V Y Y Slowly Turn Off Driver, IB=200mA Slowly Turn Off Driver of BJT Y Y Turn On LDO Y Y VRT<0.8V TSD=Logic High N Y Turn Off Active Bleeder VB>VOUT+9V Y Turn On Driver, IDRSTARTUP=19mA Y Y VIN>32.75V Y Y Fast Turn Off Driver of BJT VB<VOUT+7.25V N N N VIN>71V IDR=200mA Monitor Output Current Monitor VB and VOUT IOUTLMT=170mA Monitor VRT N Thermal Monitor N VB<7.6V Y (13) Slowly Turn On Driver, IB=200mA Turn Off LDO UVLO, OTP, Vo SCP, OLP Protection are auto restart Notes: 12) The parameters in the flow chart refer to the 12V output voltage. 13) The ‘slowly turn on’ only happens when VIN is from high voltage to low voltage through VIN slow turn on threshold while VB is lower than its turn on threshold. MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 18 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR EVOLUTION OF THE SIGNALS IN THE PRESENCE OF FAULTS VB OVP Start Up Unplug from Main Input Normal OLP Occurs Operation OTP Occurs Normal operation VBPKLMT VBTHOUT VBBLDON VBUVLO 0 t IDR 200mA 19mA 0 t VOUT 0 Active Bleeder On 0 t Off t Fault/ Events 0 VBpeak Regulation MP103 Rev. 1.01 1/23/2014 OLP Occurs OTP or TSD Fault Occurs www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. t 19 MP103 EASYPOWERTM –HIGHER POWER OFFLINE INDUCTOR- LESS REGULATOR PACKAGE INFORMATION SOIC8E NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP103 Rev. 1.01 1/23/2014 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 20