? semiconductor components industries, llc, 2009 august, 2009 ? rev. 4 1 publication order number: ncp4300a/d ncp4300a dual operational amplifier and voltage reference the ncp4300a is a monolithic integrated circuit specifically designed to control the output current and voltage levels of switch mode battery chargers and power supplies. this device contains a precision 2.6 v shunt reference and two operational amplifiers. op ? amp 1 is designed to perform voltage control and has its non ? inverting input internally connected to the reference. op ? amp 2 is designed for current control and has both inputs uncommitted. the ncp4300a offers the power converter designer a control solution that features increased precision with a corresponding reduction in system complexity and cost. this device is available in an 8 ? lead surface mount package. features ? this is a pb ? free device operational amplifier ? low input offset voltage: 0.5 mv ? input common mode voltage range includes ground ? low supply current: 210 a/op ? amp (@v cc = 5.0 v) ? medium unity gain bandwidth: 0.7 mhz ? large output voltage swing: 0 v to v cc ? 1.5 v ? wide power supply voltage range: 3.0 v to 35 v voltage reference ? fixed output voltage reference: 2.60 v ? high precision over temperature: 1.0% ? wide sink current range: 80 a to 80 ma typical applications ? battery charger ? switch mode power supply figure 1. functional block diagram + output 1 inputs 1 v cc output 2 gnd + 1 2 3 4 7 6 5 8 inputs 2 - - 2.6 v http://onsemi.com marking diagram soic ? 8 d suffix case 751 1 8 pin connections 18 7 6 5 2 3 4 (top view) out 1 in 1 ? in 1+ v cc out 2 in 2+ in 2 ? gnd a = assembly location l = wafer lot y = year w = work week a = option code = pb ? free package device package shipping ? ordering information ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specification brochure, brd8011/d. n4300 alywa 1 8 ncp4300adr2g soic ? 8 (pb ? free) 2500/tape & reel NCP4300ADG soic ? 8 (pb ? free) 98 units / rail
ncp4300a http://onsemi.com 2 absolute maximum ratings rating symbol value unit supply voltage (v cc to gnd) v cc 36 v esd protection voltage at any pin (human body model) v esd 2.0 k (min) v op ? amp 1 and 2 input voltage range (pins 2, 5, 6) v ir ? 0.6 to v cc +0.6 v op ? amp 2 input differential voltage range (pins 5, 6) v idr v cc to gnd v voltage reference cathode current (pin 3) i k 100 ma maximum junction temperature t j 150 c operating ambient temperature range t a 0 to 105 c storage temperature range t stg ? 55 to 150 c 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. thermal characteristics rating symbol value unit thermal resistance, junction ? to ? ambient r ja 155 c/w thermal resistance, junction ? to ? case r jc 45 c/w typical electrical characteristics characteristic symbol min typ max unit total supply current, excluding current in the voltage reference v cc = 5.0 v, no load; 0 c t a 105 c i cc ? 0.42 0.8 ma op ? amp 1 (op ? amp with non ? inverting input connected to the internal vref) (v cc = 5.0 v, v out = 1.4 v, t a = 25 c, unless otherwise noted) input offset voltage t a = 25 c t a = 0 c to 105 c v io ? ? 0.5 ? 2.0 3.0 mv input offset voltage temperature coefficient t a = 0 c to 105 c v io / t ? 7.0 ? v/ c input bias current (inverting input only) t a = 25 c t a = 0 c to 105 c i ib ? ? ? 50 ? ? 150 ? 150 na large signal voltage gain (v cc = 15 v, r l = 2.0 k , v out = 1.4 v to 11.4 v) t a = 25 c t a = 0 c to 105 c a vol 50 25 100 ? ? ? v/mv power supply rejection (v cc = 5.0 v to 30 v) psrr 40 90 ? db output source current (v cc = 15 v, v out = 2.0 v, v id = +1.0 v) i o+ 10 16 ? ma output sink current (v cc = 15 v, v out = 2.0 v, v id = ? 1.0 v) i o ? 10 25 ? ma output voltage swing, high (v cc = 30 v, r l = 10 k , v id = +1.0 v) t a = 25 c t a = 0 c to 105 c v oh 27 27 28 ? ? ? v output voltage swing, low (r l = 10 k , v id = ? 1.0 v) t a = 25 c t a = 0 c to 105 c v ol ? ? 17 ? 100 100 mv slew rate (v in = 0.5 to 2.0 v, v cc = 15 v, r l = 2.0 k , a v = 1.0, c l = 100 pf) sr 0.3 0.5 ? v/ s unity gain bandwidth (v cc = 30 v, r l = 2.0 k , c l = 100 pf, v in = 0.5 vpp @ f = 70 khz) bw 0.3 0.7 ? mhz total harmonic distortion (f = 1.0 khz, a v = 10, r l = 2.0 k , v cc = 30 v, v out = 2.0 v pp ) thd ? 0.02 ? %
ncp4300a http://onsemi.com 3 typical electrical characteristics (continued) characteristic symbol min typ max unit op ? amp 2 (independent op ? amp) (v cc = 5.0 v, v out = 1.4 v, t a = 25 c, unless otherwise noted) input offset voltage t a = 25 c t a = 0 c to 105 c v io ? ? 0.5 ? 2.0 3.0 mv input offset voltage temperature coefficient t a = 0 c to 105 c v io / t ? 7.0 ? v/ c input offset current t a = 25 c t a = 0 c to 105 c i io ? ? 2.0 ? 30 30 na input bias current t a = 25 c t a = 0 c to 105 c i ib ? ? ? 50 ? ? 150 ? 150 na input common mode voltage range (v cc = 0 v to 35 v) v icr ? 0 to v cc ? 1.5 ? v large signal voltage gain (v cc = 15 v, r l = 2.0 k , v out = 1.4 v to 11.4 v) t a = 25 c t a = 0 c to 105 c a vol 50 25 100 ? ? ? v/mv power supply rejection (v cc = 5.0 v to 30 v) psrr 40 90 ? db common mode rejection (v cm = 0 v to 3.5 v) t a = 25 c t a = 0 c to 105 c cmrr 40 30 60 ? ? ? db output source current (v cc = 15 v, v out = 2.0 v, v id = +1.0 v) i o+ 10 16 ? ma output sink current (v cc = 15 v, v out = 2.0 v, v id = ? 1.0 v) i o ? 10 25 ? ma output voltage swing, high (v cc = 30 v, r l = 10 k , v id = +1.0 v) t a = 25 c t a = 0 c to 105 c v oh 27 27 28 ? ? ? v output voltage swing, low (r l = 10 k , v id = ? 1.0 v) t a = 25 c t a = 0 c to 105 c v ol ? ? 17 ? 100 100 mv slew rate (v in = 0.5 to 3.0 v, v cc = 15 v, r l = 2.0 k , a v = 1.0, c l = 100 pf) sr 0.3 0.5 ? v/ s unity gain bandwidth (v cc = 30 v, r l = 2.0 k , c l = 100 pf, v in = 0.5 vpp @ f = 70 khz) bw 0.3 0.7 ? mhz total harmonic distortion (f = 1.0 khz, a v = 10, r l = 2.0 k , v cc = 30 v, v out = 2.0 v pp ) thd ? 0.02 ? % voltage reference reference voltage (i k = 10 ma) t a = 25 c t a = 0 c to 105 c v ref ? 2.574 2.60 2.60 ? 2.626 v reference input voltage deviation over full temperature range (i k = 10 ma, t a = 0 c to 105 c) v ref ? 5.0 22 mv minimum cathode current for regulation i k(min) ? 55 80 a dynamic impedance t a = 25 c, i k = 1.0 to 80 ma, f 1.0 khz t a = 0 c to 125 c, i k = 1.0 ma to 60 ma, f 1.0 khz |z ka | ? ? 0.3 ? 0.5 0.6
ncp4300a http://onsemi.com 4 0 ? 5.0 ? 15 ? 10 ? 20 ? 25 2.600 2.610 2.590 2.580 2.620 ? 1.0 60 2.0 1.0 0 i k , cathode current (ma) ? 20 t a , ambient temperature ( c) figure 2. reference cathode current vs. cathode voltage figure 3. reference voltage vs. ambient temperature v ref , reference voltage (v) 0 0.4 0.35 50 0.3 0.25 0.2 100 figure 4. reference dynamic impedance vs. ambient temperature t a , ambient temperature ( c) figure 5. reference stability vs. load capacitance t a , ambient temperature ( c) v o , input offset voltage (mv) |z ka |, dynamic impedance ( ) figure 6. input offset voltage vs. ambient temperature t a , ambient temperature ( c) i ib , input bias current (na) 080 60 40 20 100 0 40 100 080 60 40 100 20 0.5 ? 0.5 ? 1.0 1.0 i k = 10 ma v ka , cathode voltage (v) 0 20 40 3.0 20 80 60 v cc = 5.0 v v cc = 5.0 v op ? amp 1 t a = 25 c i k = 1.0 ma to 60 ma 0 figure 7. input bias current vs. ambient temperature 4.0 6.0 2.0 0 10 c l , load capacitance 100 pf 1000 pf 1.0 f10 f 100 f 8.0 i k , cathode current (ma) unstable stable t a = 25 c op ? amp 2 op ? amp 1 op ? amp 2 stable
ncp4300a http://onsemi.com 5 55 50 60 65 figure 8. common mode rejection ratio vs. supply voltage v cc , supply voltage (v) cmrr, common mode rejection ratio (db) 030 20 10 40 v cc = 3.0 v to 35 v 105 c 25 c 0 c detailed operating description introduction power supplies and battery chargers require precise control of output voltage and current in order to prevent catastrophic damage to the system connected. many present day power sources contain a wide assortment of building blocks and glue devices to perform the required sensing for proper regulation. typical feedback loop circuits may consist of a voltage and current amplifier , summing circuitry and a reference. the ncp4300a contains all of these basic functions in a manner that is easily adaptable to many of the various power source ? load configurations. operating description the ncp4300a is an analog regulation control circuit that is designed to simultaneously close the voltage and current feedback loops in power supply and battery charger applications. this device can control the feedback loop in either constant ? voltage (cv) or constant ? current (cc) mode with smooth crossover. a concise description of the integrated circuit blocks is given in below. the functional block diagram of the ic is shown in figure 1. internal reference an internal precision band gap reference is used to set the 2.6 v voltage threshold and current threshold setting. the reference is initially trimmed to a 0.5% tolerance at t a = 25 c and is guaranteed to be within 1.0% over an ambient temperature range of 0 c to 105 c. voltage sensing operational amplifier (op ? amp 1) the internal op ? amp 1 is designed to perform the voltage control function. the non ? inverting input of the op ? amp is connected to the precision voltage reference internally. the inverting input of the op ? amp monitors the voltage information derived from the system output. as the control threshold is internally connected to the voltage reference, the voltage regulation threshold is fixed at 2.6 v. for any output voltage from 2.6 v up to the maximum limit can be configurated with an external resistor divider. the output terminal of op ? amp 1 (pin 1) provides the error signal for output voltage control. the output pin also provides a means for external compensation. independent operational amplifier (op ? amp 2) the internal op ? amp 2 is configurated as a general purpose op ? amp with all terminals available for the user. with the low offset voltage provided, 0.5 mv, this op ? amp can be used for current sensing in a constant current regulator.
ncp4300a http://onsemi.com 6 the above circuit demonstrates the use of the ncp4300a in a constant ? current constant ? voltage switch mode battery char- ger application. the charging current level is set by resistors r3, r4, and r5. the reference voltage is divided down by resist - ors r3 and r4 to create an offset voltage at pin 6. this results in a high state at the op amp output, pin 7. as the battery pa ck charge current increases, a proportional increasing voltage is developed across r5 that will eventually cancel out the pin 6 offset voltage. this will cause the op amp output to sink current from the opto isolator diode, and control the smps block in a constant ? current mode. resistors r1 and r2 divide the battery pack voltage down to the 2.6 v reference level. as the battery pack voltage exceeds the desired programmed level, the voltage at pin 2 will become slightly greater than pin 3. this will cause the op amp output to sink current from the opto isolator diode, and control the smps block in a constant ? voltage mode. the formulas for programming the output current and voltage are given below. figure 9. constant ? current constant ? voltage switch mode battery charger i out v ref r3 r4 1 r5 with : r3 30 k r4 1.2 k r5 0.1 i out 1.0 a v out r1 r2 1 v ref with : r1 4.7 k r2 3.6 k v out 6.0 v + + 123 4 76 5 8 - - 2.6 v ac line smps opto isolator r4 r5 current sense r3 r2 r1 v out i out battery pack + ?
ncp4300a http://onsemi.com 7 package dimensions soic ? 8 d suffix case 751 ? 07 issue aj seating plane 1 4 5 8 n j x 45 k notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.127 (0.005) total in excess of the d dimension at maximum material condition. 6. 751 ? 01 thru 751 ? 06 are obsolete. new standard is 751 ? 07. a b s d h c 0.10 (0.004) dim a min max min max inches 4.80 5.00 0.189 0.197 millimeters b 3.80 4.00 0.150 0.157 c 1.35 1.75 0.053 0.069 d 0.33 0.51 0.013 0.020 g 1.27 bsc 0.050 bsc h 0.10 0.25 0.004 0.010 j 0.19 0.25 0.007 0.010 k 0.40 1.27 0.016 0.050 m 0 8 0 8 n 0.25 0.50 0.010 0.020 s 5.80 6.20 0.228 0.244 ? x ? ? y ? g m y m 0.25 (0.010) ? z ? y m 0.25 (0.010) z s x s m 1.52 0.060 7.0 0.275 0.6 0.024 1.270 0.050 4.0 0.155 mm inches scale 6:1 *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* 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. ncp4300a/d 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 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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