sen012-013 senzero family www.powerint.com november 2010 zero 1 loss high voltage sense signal disconnect ic ? product highlights features and performance ? eliminates signifcant standby losses ? disconnects unnecessary circuit blocks during standby, remote-off, or light-load conditions ? ultra low leakage (maximum 1 m a) 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 ? C energy effcient ? <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 effciency standards 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 feed- forward 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. the device is available in 2 (sen012) and 3 (sen013) channel versions according to the applications 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 confguration provides easy integration into existing systems by using the system v cc 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 confguration is designed to meet pin-pin fault conditions. figure 2. typical application sen013. figure 1. typical application sen012. pi-5812-032510 d1 vcc d2 d3 s1 g s2 s3 system v cc high-voltage dc rail system standby signal system ground to controller(s) sense pins senzero pi-5813-032510 d1 vcc d2 s1 g s2 system v cc high-voltage dc rail system standby signal system ground to controller(s) sense pins senzero component selection table product 2 integrated disconnect mosfets 230 vac power consumption in standby sen012dg 2 <1 mw sen013dg 3 <1.5 mw table 1. component selection table. notes: 1. iec 62 301 clause 4.5 rounds standby power use below 5 mw to zero. 2. package: d: so-8.
rev. b 11/05/10 2 sen012-013 www.powerint.com figure 3. senzero functional block diagram figure 4. pin confguration. figure 5. t ypical r ds(on) as a function of v cc -v s voltage. figure 6. t ypical r ds(on) as a function of v s voltage. pin functional description source (s1, s2, s3) pins : internally connect to the sources of mosfets 1, 2 and 3 respectively. 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 v cc(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. ground (g) pin: this is the ground reference for all the senzero pin voltages. pi-5814-051710 sen012dg d package (so-8) sen013dg s1 d1 nc s2 1 2 3 4 8 7 6 5 vcc g nc d2 s1 d1 d2 s2 1 2 3 4 8 7 6 5 vcc g d3 s3 pi-5815-012810 drain1 (d1) drain2 (d2) drain3 (d3) ground (g) supply (vcc) gate drive and protection source3 (s3) source2 (s2) source1 (s1) step down 4 6 7 11 10 8 5 9 v cc -v s (v) r ds(on) () 650 600 550 500 450 400 350 300 pi-5938-071610 v s = 0 v s = 3 v s = 6.5 t j = 25 c 0 1 3 4 76 2 5 v s (v) r ds(on) () 550 500 450 400 350 pi-5939-071610 v cc -v s = 6 v v cc -v s = 5 v
rev. b 11/05/10 3 sen012-013 www.powerint.com 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 approxi- mately 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. it is not necessary to provide a local bypass capacitor on the vcc pin. operating confgurations for the senzero one confguration 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, r b and v z . this confguration 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, r b and v z ) can be eliminated. figure 7. s enzero powered from an unregulated bias winding through a series pass regulator . device is enabled when bias voltage is present. pi-6052-072010 unregulated bias q1 (2n3904) v z senzero vcc g d1 d2 s1 s2 r b (2 k) pi-6051-072010 on/off disable regulated auxiliary q1 (2n3906) r b (2 k) senzero vcc g r a (20 k) d1 d2 s1 s2 pi-6053-110510 unregulated bias q1 (2n3904) v z senzero vcc g d1 d2 s1 s2 r b (2 k) r b (100 k) on/off enable q2 (2n3906) a confguration that can be used to trigger remote-off functionality is shown in figure 8. in this confguration, 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. figure 8. senzero powered from a regulated auxiliar y winding. an alternative remote-off confguration 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. figure 9. a modifed v ersion of an unregulated bias winding supplying power through a series pass regulator . transistor q2 provides remote-off functionality .
rev. b 11/05/10 4 sen012-013 www.powerint.com application example senzero in pfc bus voltage feedback network commercial pfc ics 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 C input to the non-inverting input of the error amplifer 2. ovp detection - input to the ovp comparator 3. open loop protection C used to detect open loop conditions the last 2 functions were used for protecting the bus from overvoltage condition. figure 10. pfc bus v oltage 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. pi-6203-102510 error amplifier olp r1 r2 r3 r fb c bulk pfc v out ovp fb pfc ic senzero switch on on off off off off vcc senzero pfc pi-6205-102510 on on on off off off off off off ps (on) senzero pfc pi-6206-102510 figure 11. t iming 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. figure 12. t iming between pfc ic and senzero with ps (on) signal. 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.
rev. b 11/05/10 5 sen012-013 www.powerint.com pi-6204-102510 ovp gnd senzero vcc gnd pfc ic ub ra 2 k r1 10 qa c1 c2 d1 d2 vcc figure 13. t ypical connection with ps (on) signal. the fgure 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 frst before senzero. capacitors c1 and c2 can be 100 nf standard decoupling capacitors. however, c1 needs to be c2.
rev. b 11/05/10 6 sen012-013 www.powerint.com parameter symbol conditions t a = -40 c to 105 c (unless otherwise specifed) min typ max units input vcc pin input current i vcc measured at v cc(max) 0.5 ma mosfet on drive voltage (v cc - [max of v s1 , v s2 and v s3 ]) v cc(on) see note a v s < 5 v 5 v v s 5 v 6 output on-state resistance r ds(on) v s = 0 v v cc(on) = 5 v i d = 1 ma see note d t j = 25 c 400 w t j = 100 c 550 v s = 6.5 v v cc(on) = 6 v i d = 1 ma t j = 25 c 525 650 t j = 100 c 750 1000 off-state drain leakage i dss v ds = 325 v, t j = 25 c, v cc = v s = 0 v see note b 1 ma breakdown voltage bv dss t j = 25 c see note c 650 v q1, q2 and q3 saturation current i ds(on) t j = 100 c, v cc(on) = 5 v 1 ma notes a. this is the minimum voltage difference required between v cc and the highest of voltages v s1 , v s2 and v s3 to achieve the r ds(on) specifcation 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, v cc(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. absolute maximum ratings (1) drain pin voltage (d1, d2, d3) ..............................-0.3 v to 650 v vcc pin voltage ................................................... -0.3 v to 16 v voltage on s1, s2, s3 pins .................................. -0.3 v to 6.5 v storage temperature ...................................... -65 c to 150 c operating junction temperature ...................... -40 c to 125 c lead temperature (2) ......................................................... 260 c notes: 1. a ll voltages referenced to ground, t a = 25 c. 2. 1/16 in. from case for 5 seconds.
rev. b 11/05/10 7 sen012-013 www.powerint.com pi-5615-041210 d08a so-8 (d package) 3.90 (0.154) bsc 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. 0.20 (0.008) c 2x 1 4 5 8 2 6.00 (0.236) bsc d 4 a 4.90 (0.193) bsc 2 0.10 (0.004) c 2x d 0.10 (0.004) c 2x a-b 1.27 (0.050) bsc 7x 0.31 - 0.51 (0.012 - 0.020) 0.25 (0.010) m c a-b d 0.25 (0.010) 0.10 (0.004) (0.049 - 0.065) 1.25 - 1.65 1.75 (0.069) 1.35 (0.053) 0.10 (0.004) c 7x c h o 1.27 (0.050) 0.40 (0.016) gauge plane 0 - 8 1.04 (0.041) ref 0.25 (0.010) bsc seating plane 0.25 (0.010) 0.17 (0.007) detail a detail a c seating plane pin 1 id b 4 + + + 5.45 (0.215) 1.27 (0.050) 0.60 (0.024) 1.45 (0.057) reference solder pad dimensions + 4.00 (0.157) part ordering information ? senzero product family ? senzero series number ? package identifer d plastic so-8 ? package material g green: halogen free and rohs compliant ? tape & reel and other options blank standard confgurations tl tape & reel sen 012 d g - tl part number options quantity sen012dg tube 98 sen012dg-tl tape and reel 2500 sen013dg tube 98 SEN013DG-TL tape and reel 2500
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 signifcant 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. main: +1-408-414-9200 customer service: phone: +1-408-414-9665 fax: +1-408-414-9765 e-mail: usasales@powerint.com china (shanghai) room 1601/1610, tower 1 kerry everbright city no. 218 tianmu road west shanghai, p.r.c. 200070 phone: +86-21-6354-6323 fax: +86-21-6354-6325 e-mail: chinasales@powerint.com china (shenzhen) rm a, b & c 4th floor, block c, electronics science and technology bldg., 2070 shennan zhong rd, shenzhen, guangdong, china, 518031 phone: +86-755-8379-3243 fax: +86-755-8379-5828 e-mail: chinasales@powerint.com germany rueckertstrasse 3 d-80336, munich germany phone: +49-89-5527-3910 fax: +49-89-5527-3920 e-mail: eurosales@powerint.com india #1, 14th main road vasanthanagar bangalore-560052 india phone: +91-80-4113-8020 fax: +91-80-4113-8023 e-mail: indiasales@powerint.com italy via de amicis 2 20091 bresso mi italy phone: +39-028-928-6000 fax: +39-028-928-6009 e-mail: eurosales@powerint.com japan kosei dai-3 bldg. 2-12-11, shin-yokohama, kohoku-ku yokohama-shi kanagwan 222-0033 japan phone: +81-45-471-1021 fax: +81-45-471-3717 e-mail: japansales@powerint.com korea rm 602, 6fl korea city air terminal b/d, 159-6 samsung-dong, kangnam-gu, seoul, 135-728, korea phone: +82-2-2016-6610 fax: +82-2-2016-6630 e-mail: koreasales@powerint.com singapore 51 newton road #19-01/05 goldhill plaza singapore, 308900 phone: +65-6358-2160 fax: +65-6358-2015 e-mail: singaporesales@powerint.com taiwan 5f, no. 318, nei hu rd., sec. 1 nei hu dist. taipei, taiwan 114, r.o.c. phone: +886-2-2659-4570 fax: +886-2-2659-4550 e-mail: taiwansales@powerint.com europe hq 1st floor, st. jamess house east street, farnham surrey gu9 7tj united kingdom phone: +44 (0) 1252-730-141 fax: +44 (0) 1252-727-689 e-mail: eurosales@powerint.com applications hotline world wide +1-408-414-9660 applications fax world wide +1-408-414-9760 revision notes date a initial release 08/18/10 b added applications example section, updated figure 9 11/05/10
|
