? semiconductor components industries, llc, 2010 may, 2010 ? rev. 0 1 publication order number: NCS5650/d NCS5650 2 amp plc line driver the NCS5650 is a high efficiency, class a/b, low distortion power line driver. its design is optimized to accept a signal from a power line carrier modem. the output stage is designed to drive up to 2 a peak into an isolation transformer or simple coil coupling to the mains. at output current of 1.5 a, the output voltage is guaranteed to swing within 1 v or less of either rail giving the user improved snr. power supply options are single ? sided 6 v to 12 v and dual balanced 3.0 v to 6.0 v. the input stage contains an operational amplifier which can be configured as a unity gain follower buffer or used to provide the first stage of a 4 ? pole low pass filter. in addition the NCS5650 offers a current limit programmable with a single resistor, r ? limit , together with a current limit flag. the device provides two independent thermal flags with hysteresis: a thermal warning flag to let the user know the internal junction temperature has reached a user programmable thermal warning threshold and a thermal error flag that indicates the internal junction temperature has exceeded 150 c. in shutdown mode the NCS5650 output goes into a high ? impedance state. the NCS5650 comes in a 20 lead qfn package (4x4x1mm) with an exposed thermal pad for enhanced thermal reliability. features ? rail ? to ? rail drop of only 1 v with i out = 1.5 a ? v cc : single ? sided (6 v to 12 v) or dual ? balanced 6.0 v ? flexible 4th ? order filtering ? current ? limit set with one resistor ? diagnostic flags level shifted to v_ c to simplify interface with external mcu ? thermal warning flag with flexible threshold setting ? thermal error flag and shutdown ? overcurrent flag ? enable/shutdown control ? extended junction temperature range: ? 40 c to +125 c ? small package: 20 ? pin 4x4x1mm qfn with exposed thermal pad ? optimized for operation in the cenelec a to d frequency band ? this is a pb ? free device typical applications ? power line communication driver in amm and amr metering systems ? valve, actuator, and motor driver ? audio qfn20 case 485e marking diagram http://onsemi.com 20 1 a = assembly location l = wafer lot y = year w = work week = pb ? free package (note: microdot may be in either location) ncs 5650 alyw 1 20 device package shipping ordering information NCS5650mntxg qfn20 (pb ? free) 3000 / tape & reel ?for information on tape and reel specifications, including part or orientation and tape sizes, please refer to our t ape and reel packaging specifications brochure, brd8011/d.
NCS5650 http://onsemi.com 2 figure 1. pin connections 1 2 3 4 5 15 14 13 12 11 678 910 20 19 18 17 16 exposed pad (top view) NCS5650 note: the exposed pad (ep) on package bottom must be attached to a heat ? sinking conduit. the exposed pad must be electrically connected to v ee . figure 2. NCS5650 block diagram enable amp a (+) amp a ( ? ) v warn v cc v com v c gnd c v ee r lim flag amp b (+) amp b ( ? ) amp a_out amp b_out i lim t sd t w
NCS5650 http://onsemi.com 3 pin description pin# symbol pin function 1 enable enable/ shutdown input (low = enable) 2 v com virtual common at (v cc ? v ee )/2 (see note 1 below) 3 amp a (+) positive (+) input of op amp a 4 amp a ( ? ) negative ( ? ) input of op amp a 5 amp a out output of op amp a 6 v cc positive supply for amplifiers 7 v cc positive supply for amplifiers 8 amp b out output of op amp b 9 amp b out output of op amp b 10 v ee negative supply for amplifiers 11 v ee negative supply for amplifiers 12 amp b ( ? ) negative ( ? ) input of op amp b 13 amp b (+) positive (+) input of op amp b 14 v ? warn thermal warming temp is set by a voltage determined by the ratio of two resistors (see figure 6). 15 r ? limit output b current limit set resistor (r ? limit) to pin 10 16 i lim flag current limit flag (high indicates output current limit set by r ? limit) 17 tsd flag thermal shutdown flag (high indicates junction temperature 150 c) 18 tw flag thermal warning flag (high indicates junction temperature threshold set by v ? warn) 19 v_ c digital supply for logic flag thresholds 20 gnd_ c digital ground for logic flag thresholds 21 exposed pad the exposed pad should be connected to the lowest voltage potential in the circuit. 1. the principal purpose of pin 2 is to facilitate the implementation of the 4th ? order lowpass filter when operating on single ? sided supply by providing a virtual common at mid ? supply. when operating on dual balanced supplies, pin 2 must be left floating and the external common of the dual supplies should be used for the filter implementation. maximum ratings symbol rating value unit v s supply voltage (v cc to v ee ) 13.2 v v icr input common mode voltage range (v ee ? 0.3v, v cc + 0.3v) v t j maximum junction temperature (operating range ? 40 c to 125 c) 160 c t stg storage temperature ? 65 to 150 c mounting temperature (infrared or convection ? 30 sec) 260 msl moisture sensitivity level level 1 ja thermal resistance 20 ? pin qfn with exposed thermal pad (with exposed thermal pad soldered to 9 in 2 of 2 oz cu pcb area (62 mil thick board) using 14 vias each with an 18 mil diameter and 1.5 mils cu walls. see application information.) 33 c/w logic control pins enable, r limit , i lim , tsd, tw, v c 5.5 v stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability.
NCS5650 http://onsemi.com 4 electrical characteristics v s = 12 v all limits apply over the temperature range, t j = ?40 c to +125 c, unless otherwise noted. total supply v s = v cc ? v ee . parameter symbol condition NCS5650 units min typ max input operational amplifier (op amp a) offset voltage input offset voltage v os v cc = +12 v, v ee = 0 v 3 10 mv offset vs power supply psrr v cc = +6 v, v ee = ? 6 v 25 150 uv/v input bias current (note 2) i b na input voltage noise density e n f = 1 khz, v in = gnd, bw = 131 khz 250 nv/ hz input voltage range common ? mode voltage range v cm v ee ? 0.1 v cc ? 3 v common ? mode rejection ratio cmrr v ee ? 0.1 v cm v cc ? 3 70 85 db input impedance differential 0.2 | 1.5 g | pf common ? mode 0.2 | 3 g | pf open ? loop gain (note 2) r l = 500 80 100 db frequency response gain bandwidth product gbw 80 mhz full power bandwidth (note 2) g = +5, v out = 11 v pp 200 1.5 mhz slew rate sr 60 v/ s total harmonic distortion + noise thd+n g = +1, r l = 500 , v o = 8 v pp , f = 1 khz, c in = 220 f, c out = 330 f 0.015 % g = +1, r l = 50 , v o = 8 v pp , f = 100 khz, c in = 220 f, c out = 330 f 0.023 output voltage output swing from rail v cc = +12 v, v ee = 0 v from positive rail v oh r l = 500 v cc 0.3 1 v from negative rail v ol r l = 500 v cc 0.3 1 v short ? circuit current i sc 280 ma output impedance z0 closed loop g = +4, f = 100 khz 0.25 capacitive load drive c load 100 pf output operational amplifier (op amp b) offset voltage input offset voltage v os v cc = +12 v, v ee = 0 v 3 10 mv offset vs power supply psrr v cc = +12 v, v ee = 0 v 25 150 v/v input bias current (note 2) i b 1 na input voltage noise density e n f = 1 khz, v in = gnd, bw = 131 khz 125 nv/ hz input voltage range common ? mode voltage range v cm v ee ? 0.1 v cc ? 3 v common ? mode rejection ratio cmrr v ee ? 0.1 v cm v cc ? 3 70 85 db 2. guaranteed by characterization or design. 3. formula accuracy requires a resistor with 1% tolerance.
NCS5650 http://onsemi.com 5 electrical characteristics v s = 12 v all limits apply over the temperature range, t j = ?40 c to +125 c, unless otherwise noted. total supply v s = v cc ? v ee . parameter units NCS5650 condition symbol parameter units max typ min condition symbol output operational amplifier (op amp b) input impedance differential 0.2 | 11 g | pf common ? mode 0.2 | 22 g | pf open ? loop gain (note 2) r l = 5 80 100 db frequency response gain bandwidth product gbw 60 mhz full power bandwidth (note 2) g = +2, v out = 11 v pp 200 400 khz slew rate sr 70 v/ s total harmonic distortion + noise thd+n g = +1, r l = 50 , v o = 8 v pp , f = 1 khz 0.015 % g = +1, r l = 50 , v o = 8 v pp , f = 100 khz 0.067 output voltage output swing from rail v cc = +12 v, v ee = 0 v from positive rail v oh i out = 1.5 a to mid ? supply 0.7 1 v from negative rail v ol i out = 1.5 a to mid ? supply 0.4 1 v voltage output swing from rail v cc = +6 v, v ee = ? 6 v from positive rail v oh i out = 1.5 a to gnd 0.7 1 v negative rail v ol i out = 1.5 a to gnd 0.4 1 v output impedance enabled mode shutdown mode z0 closed loop g = +1, f = 100 khz 0.065 12 m capacitive load drive c load 500 nf both amplifiers combined junction temperature t j at shutdown (note 2) +150 +160 c at recovery from shutdown +135 c thermal warning tolerance t warning is determined by the ratio of two resistors (see figure 8) (note 3) 10 c current limit tolerance i ? limit is determined by a single resistor (see figure 5 text) (note 3) 50 ma power supply operating voltage range v s single ? supply operation (v ee tied to system common) 6 to 12 13.2 v dual balanced ? supply operation 3.0 to 6.0 quiescent current enabled mode shutdown mode i q v cc = +6 v, v ee = ? 6 v 20 120 40 150 ma a v com v cc = 12 v, v ee = 0 v internal resistor divider. bypass purposes only. 5.8 6.0 6.2 v 2. guaranteed by characterization or design. 3. formula accuracy requires a resistor with 1% tolerance.
NCS5650 http://onsemi.com 6 electrical characteristics v s = 12 v all limits apply over the temperature range, t j = ?40 c to +125 c, unless otherwise noted. total supply v s = v cc ? v ee . parameter units NCS5650 condition symbol parameter units max typ min condition symbol logic input/output logic/flag supply range v_ c logic/flag supply for operation with external mcu 3.0 5.5 v reference point for gnd_ c v g c with single ? sided power supply v ee (pins 10 and 11) connected to system common with dual ? balanced power supply common of dual supply connected to system common shutdown input mode output enabled ve/s low e/s pin open or forced low v g c ? 0.4 v g c + 0.8 v output shutdown ve/s high e/s pin forced high v g c + 2 v_ c v output enabled ie/s low e/s pin low 0.1 a output shutdown ie/s high e/s pin high 10 a output shutdown time 60 ns output enable time (note 2) 5 10 s all flag outputs high state v g c + 2 v low state v g c + 0.8 v 2. guaranteed by characterization or design. 3. formula accuracy requires a resistor with 1% tolerance.
NCS5650 http://onsemi.com 7 applications information exposed thermal pad the NCS5650 is capable of delivering 1.5 a, into a reactive load. output signal swing should be kept as high as possible to minimize internal heat generation to keep the internal junction temperature as low as possible. the NCS5650 can swing to within 1 v of either rail without adding distortion. an exposed thermal pad is provided on the bottom of the device to facilitate heat dissipation. application note and8402/d provides considerable details for optimizing the soldering down of the exposed pad. a very good example of the exposed pad implementation is provided in the layout information included with the NCS5650 demo board. the demo board implements 14 vias, each with an 18 mil diameter and 1.5 mils copper walls. multi ? feedback filter (mfb) cenelec en 50065 ? 1 is a european standard for signaling on low ? voltage electrical installations in the frequency range 3 khz to 148. 5khz. more specifically part 1 of that specification deals with frequency bands and electromagnetic disturbances introduced into the electrical mains. a practical solution to meet this requirement is to place a 4th ? order filter between the output of the modem and the isolation transformer connected to the mains. in this datasheet a mfb filter topology is proposed to help meet the requirements of the cenelec standard. four (4) pole filters require two op amps for implementation. the NCS5650 has an input pre ? amplifier and an output power amplifier. therefore only passive components (r?s and c?s) need to be added. in addition the NCS5650 has a mid ? supply virtual common at pin 2 (v com ) to facilitate implementation of the filter topology when powered from a single ? sided power supply. figure 3 below shows the frequency response for each stage and the overall filter. ? 2 0 2 4 6 8 10 12 14 16 0.1 1 10 100 1000 figure 3. amplifier voltage vs. frequency ampa gain total gain ampb gain frequency (khz) amp out (dbv) bypassing optimal stability and noise rejection will be implemented with power ? supply bypassing placed as physically close to the device as possible. a parallel combination of 10 f and 0.01 f is recommended (ceramic and tantalum, respectively) for each sensitive point. for either single ? supply operation or split supply operation, bypass should be placed directly across v cc to v ee . in addition add bypass from v c to gnd c . reference figure 4. figure 4. v ee v o v c v cc c14 c5 c13 c6 c10 c9 6 7 10 11 v com c11 2 current limit (r ? limit) the 2 a output current of the NCS5650 can be programmed by the simple addition of a resistor (r limit ) from pin 15 to v ee (see figure 5). if the load current tries to exceed the set current limit, the i lim flag will go logic high signaling the user to take any necessary action. when the current output recovers, the i lim flag will return to logic low. the curve in figure 5 is tolerance typically to 50 ma. unlike traditional power amplifiers the NCS5650 current limits functions both when sourcing and sinking current. to calculate the resistance required to program a desired current limit the following equation can be used: i lim 1.215 r cl 8197 figure 5. v o r lim 11 15 figure 6 graphically illustrates the required resistance in ohms to program the current limit.
NCS5650 http://onsemi.com 8 current limits (a) figure 6. r limit (k ) 0 5 10 15 20 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 thermal shutdown and thermal warning flag in the event load conditions cause internal over ? heating the amplifier will go into shutdown to prevent damage. under these conditions pin 17 the tsd flag (thermal shut down) will go logic high. thermal shutdown takes place at an internal junction temperature of approximately 160 c; the amplifier will recover to the enabled mode when the junction temperature cools back down to approximately 145 c. the user has the option to avoid entering into the tsd mode by monitoring the junction temperature via the thermal warning feature. figure 8 shows how the user can select any junction temperature (t warn ) in the range 105 c to 145 c by applying the appropriate voltage to pin 14. a simple way to implement this feature is by setting the ratio of a voltage divider between v cc (pins 6,7) and v ee (the negative supply, pin 10 or 11). the voltage ratio required to program the thermal warning of the NCS5650 can be calculated using the following equation: vtw = 6.665 x 10 ? 3 (t j ) + 1.72 figure 8 illustrates the linearity of the internal junction temperature to the required voltage on pin 14 (t warn ). v ee v o v cc 14 r10 r9 figure 7. 1 1.5 2 2.5 3 ? 40 ? 20 0 20 40 80 100 120 140 1.25 1.75 2.25 2.75 60 v tw t j ( c) figure 8. virtual common (v com ) the principal purpose of v com is to provide a convenient virtual common for implementing the 4th ? order cenelec filter when operating on single ? sided power supply. when operating on balanced split supplies it is recommended to use the power supply common for the filter implementation and to leave v com floating. digital power supply gnd ? reference and translators in many mixed signal applications analog gnd and digital gnd are not always at the same potential. to minimize gnd loop issues, the NCS5650 has a separate gnd pin (pin 20) which should be used to reference the digital supply and the warning flags (pins 16, 17, and 18). in most applications this would be the same gnd reference used for the plc modem. please note that at some point in the application digital gnd and analog gnd must be tied together.
NCS5650 http://onsemi.com 9 package dimensions case 485e ? 01 issue a 2.88 20x 0.35 20x 0.58 4.30 0.50 dimensions: millimeters 1 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* pitch pkg outline dim min max millimeters d 4.00 bsc e 4.00 bsc a 0.80 1.00 b 0.20 0.30 e 0.50 bsc l1 0.00 0.15 a3 0.20 ref a1 --- 0.05 l 0.35 0.45 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b applies to plated terminal and is measured between 0.15 and 0.30 mm from the terminal tip. 4. coplanarity applies to the exposed pad as well as the terminals. d2 e2 1 6 11 20 d2 2.70 2.90 e2 2.70 2.90 e l1 detail a l optional constructions ?? ?? 0.15 c pin one reference top view 2x 0.15 c a a1 (a3) 0.08 c 0.10 c c seating plane side view detail b bottom view b 20x 0.10 b 0.05 a c c note 3 detail a k 0.20 ref 0.10 b a c l 20x 0.10 b a c k 4.30 2.88 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 NCS5650/d literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative
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