SEN012-013 SENZero Family ® Zero1 Loss High Voltage Sense Signal Disconnect IC Product Highlights Features and Performance • Eliminates significant standby losses • Disconnects unnecessary circuit blocks during standby, remote-off, or light-load conditions • Ultra low leakage (maximum 1 mA) 650 V MOSFETs • <0.5 mW per channel during standby • Single component provides remote disconnect functionality • No external components or additional bias supply needed for remote-off • Integrates multiple disconnect MOSFETs, gate drive, and protection • Minimal component count provides higher reliability • Protection features to help production/manufacturing yields • Pin-to-pin fault and ESD protection • Triggerable via remote-off signal or load conditions • Integrated gate pull down circuit protects against loss of trigger signal fault • Green package technology • RoHS compliant and halogen free • Withstands high differential surge conditions • S1, S2 and S3 interface with controller pins up to 6.5 V above system ground EcoSmart ® – Energy Efficient • <3 mW loss at 230 VAC in Off/standby mode Applications • ACDC converters with high-voltage resistive signal paths • Ideal for all very low standby systems such as those meeting EuP Lot 6 and similar energy efficiency standards High-Voltage DC Rail System VCC SENZero The device is available in 2 (SEN012) and 3 (SEN013) channel versions according to the application’s requirements. The internal gate drive and protection circuitry provides gate drive signals to the internal 650 V MOSFETs in response to the voltage applied to the VCC pin. This simple configuration provides easy integration into existing systems by using the system VCC rail as an input to the SENZero. The SENZero family uses a low cost compact SO-8 package to reduce PCB area while the pin configuration is designed to meet pin-pin fault conditions. www.powerint.com D1 D2 G S1 S2 To Controller(s) Sense Pins System Ground Figure 1. PI-5813-032510 Typical Application SEN012. High-Voltage DC Rail System VCC VCC D1 D2 D3 G S1 S2 S3 System Standby Signal SENZero Description SENZero is a compact low cost solution to eliminate losses in resistive signal paths connected between high-voltage rails and switching power supply controller(s). Examples include feedforward or feedback signal paths connected to boost controllers in power factor corrected systems and feedforward signal paths in two switch forward / LLC / half and full bridge converters. VCC System Standby Signal System Ground Figure 2. To Controller(s) Sense Pins PI-5812-032510 Typical Application SEN013. Component Selection Table Integrated Disconnect MOSFETs 230 VAC Power Consumption in Standby SEN012DG 2 <1 mW SEN013DG 3 <1.5 mW Product2 Table 1. Component Selection Table. Notes: 1. IEC 62301 clause 4.5 rounds standby power use below 5 mW to zero. 2. Package: D: SO-8. November 2010 SEN012-013 SUPPLY (VCC) DRAIN1 (D1) DRAIN2 (D2) DRAIN3 (D3) Gate Drive and Protection STEP DOWN SOURCE3 (S3) SOURCE2 (S2) SOURCE1 (S1) GROUND (G) PI-5815-012810 Pin Functional Description 650 SOURCE (S1, S2, S3) Pins : Internally connect to the SOURCEs of MOSFETs 1, 2 and 3 respectively. 600 VS = 0 VS = 3 VS = 6.5 550 RDS(ON) (Ω) DRAIN (D1, D2, D3) Pins : Internally connect to the DRAINs of MOSFETs 1, 2 and 3 respectively. VOLTAGE SUPPLY (VCC) pin The internal MOSFETs are fully turned on when the VCC pin voltage is VCC(ON) (see parameter table) or more greater than their SOURCE voltage relative to GROUND. VCC pin should be connected to GROUND to turn the MOSFETs off. PI-5938-071610 Figure 3. SENZero Functional Block Diagram TJ = 25 °C 500 450 400 350 300 4 5 6 GROUND (G) Pin: This is the ground reference for all the SENZero pin voltages. 7 8 9 10 11 5 6 7 VCC-VS (V) Figure 5. Typical RDS(ON) as a Function of VCC-VS Voltage. SEN012DG VCC-VS = 6 V VCC-VS = 5 V D1 NC S2 500 SEN013DG 1 8 2 7 3 6 4 5 VCC G S1 D1 NC D2 D2 S2 1 8 2 7 3 6 4 5 VCC G D3 S3 PI-5814-051710 Figure 4. Pin Configuration. RDS(ON) (Ω) S1 PI-5939-071610 550 D Package (SO-8) 450 400 350 0 1 2 3 4 VS (V) Figure 6. Typical RDS(ON) as a Function of VS Voltage. 2 Rev. B 11/05/10 www.powerint.com SEN012-013 Applications Considerations The maximum voltage that the device can sustain across the VCC and G pin is 16 V. The maximum voltage that any of the source channels can be at with respect to the ground terminal is 6.5 V. SENZero has a typical on state resistance of approximately 500 W at room temperature. The device is therefore typically used in series with high ohmic value resistors where this on resistance is a small percentage of the total series impedance. A configuration that can be used to trigger remote-off functionality is shown in Figure 8. In this configuration, a regulated auxiliary output is used to power the IC. Transistor Q1 serves as the ON/OFF switch which is commanded by the Enable/Disable signal at its base. Regulated Auxiliary VCC It is not necessary to provide a local bypass capacitor on the VCC pin. Operating Configurations for the SENZero One configuration to power up the SENZero is shown in Figure 7. In this circuit, SENZero is powered up from an unregulated bias winding through a simple series pass regulator formed by Q1, RB and V Z. This configuration ensures the VCC voltage is limited even if the maximum bias voltage exceeds 16 V. During power down, as soon as the bias voltage falls below V Z, SENZero will turn off. The series pass transistor Q1 is necessary only if the bias winding voltage regulation is not tight enough (unregulated). If the voltage on the bias winding is regulated or is such that the voltage on the VCC pin can be maintained in the range 6 V < VCC < 16 V, then the series pass transistor (Q1, RB and V Z) can be eliminated. Unregulated Bias Q1 (2N3906) RA (20 kΩ) SENZero G Disable D1 PI-6051-072010 An alternative remote-off configuration is shown in Figure 9 where an unregulated bias voltage supplies the SENZero through a series pass regulator similar to the one shown in Figure 7. However the circuit of Figure 9 includes an ON/OFF transistor Q2. In other versions of this circuit Q2 can be replaced by an optocoupler allowing the ON/OFF disable signal to be communicated from a secondary of the power supply such as in PC power supplies. Q1 (2N3904) RB (100 kΩ) Enable S1 D1 D2 S2 PI-6052-072010 Figure 7. SENZero Powered from an Unregulated Bias Winding Through a Series Pass Regulator. Device is Enabled When Bias Voltage is Present. Figure 9. SENZero VZ G ON/OFF G VCC RB (2 kΩ) SENZero VZ S2 Figure 8. SENZero Powered From a Regulated Auxiliary Winding. D2 RB (2 kΩ) S1 ON/OFF Q2 (2N3906) VCC D2 RB (2 kΩ) Unregulated Bias Q1 (2N3904) D1 S1 S2 PI-6053-110510 A Modified Version of an Unregulated Bias Winding Supplying Power Through a Series Pass Regulator. Transistor Q2 Provides Remote-Off Functionality. 3 www.powerint.com Rev. B 11/05/10 SEN012-013 Application Example SENZero in PFC Bus Voltage Feedback Network Commercial PFC IC’s typically has a pin dedicated for sensing the output voltage of the PFC Stage. The information on this pin is typically used by the PFC IC for various major functions. 1. Output regulation – input to the non-inverting input of the error amplifier 2. OVP detection - input to the OVP comparator 3. Open loop protection – used to detect open loop conditions The last 2 functions were used for protecting the bus from overvoltage condition. VCC ON SENZero OFF OFF ON PFC OFF OFF PI-6205-102510 Figure 11. Timing between PFC IC and SENZzero during Power-up and Power-Down. In case of shared VCC Connection, it must be ensure that SENZero have a lower turn-on and turn-off threshold voltage compared to the PFC IC. PFC VOUT CBULK R1 PFC IC ON PS(ON) OFF R2 ON SENZero OLP OFF OFF OFF ON R3 PFC OFF OFF OVP SENZero Switch PI-6206-102510 Figure 12. Timing between PFC IC and SENZero with PS(ON) Signal. FB Error Amplifier RFB PI-6203-102510 From off-state to on-state, SENZero must turn-on ahead of the PFC. From on-state to off-state, PFC must shutdown ahead of the SENZero. This is to ensure that whenever PFC is operating (switching), SENZero is invincible to the PFC. SENZero only disconnects the sense resistors when PFC is in off-condition and thus eliminates its associated losses during standby condition. Figure 10. PFC Bus Voltage Sense Network. The SENZero objective is to eliminate the losses associated with the sense resistors without affecting the functionality of the circuit. To keep the operation of the PFC IC unaffected, SENZero and PFC on and off event must follow the required timing sequence during power-up, power-down, remote-on, and remote-off event. 4 Rev. B 11/05/10 www.powerint.com SEN012-013 VCC QA R1 10 Ω UB D2 RA 2 kΩ D1 VCC C1 PFC IC GND OVP C2 SENZero GND PI-6204-102510 Figure 13. Typical Connection with PS(ON) Signal. The figure above shows a typical VCC arrangement to satisfy timing requirements. Transistor QA is enabled during remote on condition. Capacitor C2 will charge through D1 while C1 is charged through R1. SENZero will turn on ahead of PFC IC. Diode D2 makes C2 voltage tracks C1 voltage. Capacitor C2 can be increased to ensure that during turn-off, PFC turns-off first before SENZero. Capacitors C1 and C2 can be 100 nF standard decoupling capacitors. However, C1 needs to be ≥C2. 5 www.powerint.com Rev. B 11/05/10 SEN012-013 Absolute Maximum Ratings(1) DRAIN Pin Voltage (D1, D2, D3) ..............................-0.3 V to 650 V Notes: VCC Pin Voltage.................................................... -0.3 V to 16 V 1. All voltages referenced to Ground, TA = 25 °C. Voltage on S1, S2, S3 Pins................................... -0.3 V to 6.5 V 2. 1/16 in. from case for 5 seconds. Storage Temperature....................................... -65 °C to 150 °C Operating Junction Temperature.......................-40 °C to 125 °C Lead Temperature(2). ........................................................260 °C Symbol Conditions TA = -40 °C to 105 °C (Unless Otherwise Specified) VCC Pin Input Current IVCC Measured at VCC(MAX) MOSFET ON Drive Voltage (VCC - [Max of VS1, VS2 and VS3]) VCC(ON) Parameter Min Typ Max Units 0.5 mA Input See Note A VS < 5 V 5 VS ≥ 5 V 6 V Output ON-State Resistance RDS(ON) VS = 0 V VCC(ON) = 5 V ID = 1 mA See Note D VS = 6.5 V VCC(ON) = 6 V ID = 1 mA OFF-State Drain Leakage TJ = 25 °C 400 TJ = 100 °C 550 TJ = 25 °C 525 650 TJ = 100 °C 750 1000 W IDSS VDS = 325 V, TJ = 25 °C, VCC = VS = 0 V See Note B Breakdown Voltage BVDSS TJ = 25 °C See Note C 650 V Q1, Q2 and Q3 Saturation Current IDS(ON) TJ = 100 °C, VCC(ON) = 5 V 1 mA 1 mA Notes A. This is the minimum voltage difference required between VCC and the highest of voltages VS1, VS2 and VS3 to achieve the RDS(ON) specification in the parameter table. As an example, if S1 externally connects to a controller pin having a voltage of 4 V relative to G pin, VCC(ON) of 5 V will be achieved by having at least (5 V + 4 V) = 9 V applied to the SENZero VOLTAGE SUPPLY (VCC) pin relative to the G pin. B. Per channel. C. Between Ground and Drain of individual MOSFET under test. D. Guaranteed by design. 6 Rev. B 11/05/10 www.powerint.com SEN012-013 SO-8 (D Package) 4 B 0.10 (0.004) C A-B 2X 2 DETAIL A 4.90 (0.193) BSC A 4 8 D 5 2 3.90 (0.154) BSC GAUGE PLANE SEATING PLANE 6.00 (0.236) BSC C 0-8 0.25 (0.010) BSC 1.04 (0.041) REF 0.10 (0.004) C D 2X 1 Pin 1 ID 4 0.40 (0.016) 1.27 (0.050) 0.20 (0.008) C 2X 7X 0.31 - 0.51 (0.012 - 0.020) 0.25 (0.010) M C A-B D 1.27 (0.050) BSC 1.25 - 1.65 (0.049 - 0.065) 1.35 (0.053) 1.75 (0.069) o DETAIL A 0.10 (0.004) 0.25 (0.010) 0.10 (0.004) C H 7X SEATING PLANE 0.17 (0.007) 0.25 (0.010) C Reference Solder Pad Dimensions + 1.45 (0.057) 4.00 (0.157) + D08A + 5.45 (0.215) + 1.27 (0.050) Notes: 1. JEDEC reference: MS-012. 2. Package outline exclusive of mold flash and metal burr. 3. Package outline inclusive of plating thickness. 4. Datums A and B to be determined at datum plane H. 5. Controlling dimensions are in millimeters. Inch dimensions are shown in parenthesis. Angles in degrees. 0.60 (0.024) PI-5615-041210 Part Ordering Information • SENZero Product Family • SENZero Series Number • Package Identifier D Plastic SO-8 • Package Material G GREEN: Halogen Free and RoHS Compliant • Tape & Reel and Other Options Blank SEN 012 D G - TL TL Standard Configurations Tape & Reel Part Number SEN012DG Options Tube SEN012DG-TL Tape and Reel SEN013DG Tube SEN013DG-TL Tape and Reel Quantity 98 2500 98 2500 7 www.powerint.com Rev. B 11/05/10 Revision Notes Date A Initial Release 08/18/10 B Added Applications Example section, updated Figure 9 11/05/10 For the latest updates, visit our website: www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. Patent Information The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm. Life Support Policy POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS. As used herein: 1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii) whose failure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in significant injury or death to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, CPAZero, SENZero, EcoSmart, Clampless, E-Shield, Filterfuse, StakFET, PI Expert and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies. ©2010, Power Integrations, Inc. Power Integrations Worldwide Sales Support Locations World Headquarters 5245 Hellyer Avenue San Jose, CA 95138, USA. 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