? semiconductor components industries, llc, 2013 august, 2013 ? rev. 1 1 publication order number: ncp4328/d ncp4328 secondary side cv/cc controller the ncp4328 is a secondary side smps controller designed for use in applications which requires constant current and/or constant current regulation. the ncp4328x consists of two ota amplifiers for voltage and current loop regulation with precise internal voltage references. outputs of otas are open drain type (otas sink current only). the ncp4328b includes a led driver pin implemented with an open drain mosfet driven by a 1 khz square wave with a 12.5% duty cycle working when vcc is above uvlo for indication purpose. the ncp4328a is available in tsop ? 5 package while the ncp4328b is available in tsop ? 6 package. features ? operating input voltage range: 2.5 v to 36.0 v ? supply current < 100 a ? 0.5% reference voltage accuracy (t j = 25 c) ? constant voltage and constant current (a versions) control loop ? indication led pwm modulated driver (ncp4328b) ? these devices are pb ? free, halogen free/bfr free and are rohs compliant typical applications ? offline adapters for notebooks, game stations and printers ? led lightening ? high power ac ? dc converters for tvs, set ? top boxes, monitors etc. http://onsemi.com tsop ? 5 sn suffix case 483 tsop ? 6 sn suffix case 318g see detailed ordering, marking and shipping information on page 8 of this data sheet. ordering information 1 5 1 5 xxxayw xxx = specific device code a = assembly location y = year w = work week = pb ? free package marking diagrams (note: microdot may be in either location) 1 xxxayw 1
ncp4328 http://onsemi.com 2 voltage regulation v refc current regulation ota ota vcc isns vsns gnd fbc sink only sink only v ref v cc management ncp4328a ncp4328b figure 1. simplified block diagrams ncp4328a and ncp4328b v ref v cc management power reset voltage regulation 1 khz, 12% d.c. oscillator v refc current regulation ota power reset ota vcc isns sw led vsns gnd fbc sink only sink only v ref
ncp4328 http://onsemi.com 3 pin function description ncp4328a tsop ? 5 ncp4328b tsop ? 6 pin name description 1 1 vcc supply voltage pin 2 2 gnd ground 5 6 vsns output voltage sensing pin, connected to output voltage divider 4 4 isns current sensing input for output current regulation, connect it to shunt resistor in ground branch. ? 5 led pwm led driver output. connected to led cathode with current define by external serial resistance 3 3 fbc output of current sinking ota amplifiers driving feedback optocoupler?s led. connect here compensation networks as well. absolute maximum ratings rating symbol value unit input voltage v cc ? 0.3 to 40.0 v fbc, led voltage v fbc , v led ? 0.3 to v cc + 0.3 v vsns, isns voltage v sns ,v isns ? 0.3 to 10.0 v led current i led 10 ma thermal resistance ? junction ? to ? air (note 1) r ja 315 c/w junction temperature t j ? 40 to 150 c storage temperature t stg ? 55 to 125 c esd capability, human body model (note 2) esd hbm 2000 v esd capability, machine model (note 2) esd mm 250 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. 1. 50 mm 2 , 1.0 oz. copper spreader. 2. this device series incorporates esd protection and is tested by the following methods: esd human body model tested per jesd22 ? a114f esd machine model tested per jesd22 ? a115c latchup current maximum rating tested per jedec standard: jesd78d.
ncp4328 http://onsemi.com 4 electrical characteristics ? 40 c t j 125 c; v cc = 15 v; unless otherwise noted. typical values are at t j = +25 c. parameter test conditions symbol min typ max unit maximum operating input voltage v cc 36.0 v vcc uvlo v cc rising v ccuvlo 3.3 3.5 3.7 v v cc falling 2.3 2.5 2.7 vcc uvlo hysteresis v ccuvlohys 0.8 1.0 v quiescent current ncp4328a i cc 105 130 a ncp4328b 115 140 voltage control loop ota transconductance sink current only gm v 1 s reference voltage 2.8 v v cc 36.0 v, t j = 25 c v ref 1.244 1.250 1.256 v 2.8 v v cc 36.0 v, t j = 0 ? 85 c 1.240 1.250 1.264 2.8 v v cc 36.0 v, t j = ? 40 ? 125 c 1.230 1.250 1.270 sink current capability v fbc > 1.5 v i sinkv 2.5 ma inverting input bias current v sns = v ref i biasv ? 100 100 na current control loop ota transconductance sink current only gm c 3 s reference voltage t j = 25 c v refc 61.2 62.5 63.8 mv t j = ? 20 ? 85 c 60.5 62.5 64.5 t j = ? 40 ? 125 c 60.0 62.5 65.0 sink current capability v fbc > 1.5 v i sinkc 2.5 ma inverting input bias current i sns = v refc i biasc ? 100 100 na led driver (ncp4328b only) switching frequency f swled 1 khz duty cycle (note 3) d led 10.0 12.5 15.0 % switch resistance i led = 5 ma r sw 50 3. guaranteed by design.
ncp4328 http://onsemi.com 5 typical characteristics figure 2. v ref at v cc = 15 v 1.29 ? 40 ? 20 0 20 40 60 80 100 120 t j ( c) v ref (v) 1.28 1.27 1.26 1.25 1.24 1.23 1.22 figure 3. v ref at t j = 25 c 1.29 0 6 12 18 24 30 36 v cc (v) v ref (v) 1.28 1.27 1.26 1.25 1.24 1.23 1.22 figure 4. v refc at v cc = 15 v 65 ? 40 ? 20 0 20 40 60 80 100 120 t j ( c) v refc (mv) 64.5 64 63.5 63 62.5 62 61.5 61 60.5 60 65 v refc (mv) 64.5 64 63.5 63 62.5 62 61.5 61 60.5 60 figure 5. v refc at t j = 25 c v cc (v) 0 6 12 18 24 30 36 figure 6. v ccuvlo 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 ? 40 ? 20 0 20 40 60 80 100 120 t j ( c) v cc (v) vccuvlo_r vccuvlo_f
ncp4328 http://onsemi.com 6 typical characteristics i cc ( a) v cc (v) 0 6 12 18 24 30 36 figure 7. i cc at v cc = 15 v for ncp4328a t j ( c) 130 i cc ( a) ? 40 ? 20 0 20 40 60 80 100 120 120 110 100 80 80 70 figure 8. i cc at t j = 25 c for ncp4328a 130 120 110 100 80 80 70 t j ( c) 150 i cc ( a) ? 40 ? 20 0 20 40 60 80 100 120 figure 9. i cc at v cc = 15 v for ncp4328b 140 130 120 110 100 90 v cc (v) 0 6 12 18 24 30 36 150 i cc ( a) 140 130 120 110 100 90 figure 10. i cc at t j = 25 c for ncp4328b t j ( c) 3.5 i sinkv (ma) ? 40 ? 20 0 20 40 60 80 100 120 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 figure 11. voltage ota current sink capability t j ( c) 3.5 i sinkc (ma) ? 40 ? 20 0 20 40 60 80 100 12 0 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 figure 12. current ota current sink capability
ncp4328 http://onsemi.com 7 typical characteristics t j ( c) 1.40 f swled (khz) ? 40 ? 20 0 20 40 60 80 100 120 figure 13. led switching frequency at v cc = 15 v t j ( c) 100 r sw2 ( ) ? 40 ? 20 0 20 40 60 80 100 120 1.30 1.20 1.10 1.00 0.90 0.80 90 80 70 60 50 40 30 figure 14. r sw at v cc = 15 v application information typical application circuit for ncp4328a is shown in figures 15 and 16 shows typical application circuit for ncp4328b that includes internal led driver for indication purpose. power supply the ncp4328 is designed to operate from a single supply up to 36 v. it starts to operate when vcc voltage reaches 3.5 v and stops when vcc voltage drops below 2.5 v. vcc can be supplied by direct connection to the vout voltage of the power supply. it is highly recommended to add a rc filter (r1 and c2) in series from vout to vcc pin to reduce voltage spikes and drops that are produced at the converter?s output capacitors. recommended values for this filter are 220 and 1 f. voltage regulation path the output voltage is detected on the vsns pin by the r3 and r4 voltage divider. this voltage is compared with the internal precise voltage reference. the voltage difference is amplified by gm v of the transconductance amplifier. the amplifier output current is connected to the fbc pin. the compensation network is also connected to this pin to provide frequency compensation for the voltage regulation path. this fbc pin drives regulation optocoupler that provides regulation of primary side. the optocoupler is supplied via direct connection to vout line through resistor r2. regulation information is transferred through the optocoupler to the primary side controller where its fb pin is usually pulled down to reduce energy transferred to secondary output. the output voltage can be computed by equation 1. v out v ref r3 r4 r4 (eq. 1) current regulation the output current is sensed by the shunt resistor r5 in series with the load. voltage drop on r5 is compared with internal precise voltage reference v refc at i sns transconductance amplifier input. voltage difference is amplified by gm c to output current of amplifier, connected to fbc pin. compensation network is connected between this pin and isns input to provide frequency compensation for current regulation path. resistor r6 separates compensation network from sense resistor. compensation network works into low impedance without this resistor that significantly decreases compensation network impact. current regulation point is set to current given by equation 2. i outlim v refc r5 (eq. 2) led driver (ncp4328b only) led driver is active when vcc is higher than v ccmin . led driver consists of an internal power switch controlled by a pwm modulated logic signal and an external current limiting resistor r9. led current can be computed by equation 3 i led v out v f_led r9 (eq. 3) pwm modulation is used to increase efficiency of led.
ncp4328 http://onsemi.com 8 figure 15. typical application schematic for ncp4328a feedback opto d1 c1 vout r3 r2 r4 c3 r7 r5 c4 r8 r6 r1 c2 voltage regulation v refc current regulation ota ota vcc isns vsns gnd fbc sink only sink only v ref vcc management figure 16. typical application schematic for ncp4328b feedback opto d1 c1 vout r3 r2 r4 c3 r7 r5 c4 r8 indication led r9 r6 r1 c2 v ref vcc management power reset voltage regulation 1 khz, 12% d.c. oscillator v refc current regulation ota power reset t ota vcc isns sw vsns gnd fbc sink only sink only v ref led ordering information device marking led driver package shipping ? ncp4328asnt1g a32 no tsop ? 5 (pb ? free) 3000 / tape & reel NCP4328BSNT1G u32 yes tsop ? 6 (pb ? free) 3000 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d.
ncp4328 http://onsemi.com 9 package dimensions tsop ? 5 case 483 ? 02 issue k notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. maximum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. 4. dimensions a and b do not include mold flash, protrusions, or gate burrs. mold flash, protrusions, or gate burrs shall not exceed 0.15 per side. dimension a. 5. optional construction: an additional trimmed lead is allowed in this location. trimmed lead not to extend more than 0.2 from body. dim min max millimeters a 3.00 bsc b 1.50 bsc c 0.90 1.10 d 0.25 0.50 g 0.95 bsc h 0.01 0.10 j 0.10 0.26 k 0.20 0.60 m 0 10 s 2.50 3.00 123 54 s a g b d h c j 0.7 0.028 1.0 0.039 mm inches scale 10:1 0.95 0.037 2.4 0.094 1.9 0.074 *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* 0.20 5x c ab t 0.10 2x 2x t 0.20 note 5 c seating plane 0.05 k m detail z detail z top view side view a b end view
ncp4328 http://onsemi.com 10 package dimensions ? 6 case 318g ? 02 issue v 23 4 5 6 d 1 e b e1 a1 a 0.05 notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. maximum lead thickness includes lead finish. minimum lead thickness is the minimum thickness of base material. 4. dimensions d and e1 do not include mold flash, protrusions, or gate burrs. mold flash, protrusions, or gate burrs shall not exceed 0.15 per side. dimensions d and e1 are determined at datum h. 5. pin one indicator must be located in the indicated zone. c *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* dim a min nom max millimeters 0.90 1.00 1.10 a1 0.01 0.06 0.10 b 0.25 0.38 0.50 c 0.10 0.18 0.26 d 2.90 3.00 3.10 e 2.50 2.75 3.00 e 0.85 0.95 1.05 l 0.20 0.40 0.60 0.25 bsc l2 ? 0 1 0 1.30 1.50 1.70 e1 e recommended note 5 l c m h l2 seating plane gauge plane detail z detail z 0.60 6x 3.20 0.95 6x 0.95 pitch dimensions: millimeters m on semiconductor and are registered trademarks of semiconductor co mponents industries, llc (scillc). scillc owns the rights to a numb er of patents, trademarks, copyrights, trade secrets, and other intellectual property. a list ing of scillc?s product/patent coverage may be accessed at ww w.onsemi.com/site/pdf/patent ? marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and s pecifically disclaims any and all liability, including without 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 applications and actual performance may vary over time. all operating parame ters, 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 right s of others. scillc products are not designed, intended, or a uthorized 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 whic h the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or us e scillc products for any such unintended or unauthorized appli cation, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unin tended or unauthorized use, even if such claim alleges that scil lc 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 copyrig ht 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 ? 5817 ? 1050 ncp4328/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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