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1 description lt c4000egn battery charger controller and powerpath manager demonstration circuit 1830b is a battery charger control - ler and powerpath? manager featuring the lt c ? 4000. this board should be connected to a front end dc/dc power supply for a complete charger solution. the dc1830 b is customizable to handle a wide variety of applications with output voltages from 3v to 30v and out - put currents up to 6.5a with the pfets supplied, and up to 60v and/or 13a with higher voltage rating and/or added pfets. the reference design provided with dc1830a is targeted at 4-cell lifepo 4 (14.6v/5a) applications. the dc1830 b loop compensation values were proven with the ltc3845a buck-boost power converter shown and are typical for other applications. the output of this demo board was specifically tailored for a tenergy 10a -hour battery, p/n 30207. other voltages can be set by changing r ofb2 and r bfb2 . the desired nominal volt - age can be accurately trimmed by using trim resistors r ofbx and r bfbx . for example, for 14.4v battery float voltage, change r ofb2 and r bfb2 to 86.6k, and add 7.5m at r ofbx and r bfbx for greater set point accuracy. other parameters can be adjusted to suit specific applications with guidance provided in the ltc4000 data sheet. table 2 provides a summary of parameter adjustments. this circuit was designed to demonstrate the high levels of performance and small solution size attainable using l , lt, ltc, ltm, linear technology and the linear logo are registered trademarks and powerpath is a trademark of analog devices, inc. all other trademarks are the property of their respective owners. performance summary this part to control a switch mode power converter to form a battery charger, intelligent powerpath manager, and power supply system. it produces a regulated 5a/14.6v battery charger output as well as a system output of up to 5.5a: suitable for a wide variety of portable applications including instruments, industrial equipment, power tools, and computers. the dc1830 b-a provides a solution complete with both battery charger control and powerpath management. it includes a second pfet ( q2 ) between v out-sys and bat to provide instant-on functionality which keeps v out-sys within a narrow range regardless of battery voltage, and disconnects the battery when it is fully charged and power is available from the front end dc/dc converter. thermal regulation circuitry is also provided to limit the temperature of both pfets. the dc1830b-b provides a simple battery-charger-controller only solution without the powerpath manager. it deletes the second pfet and thermal regulation circuitry. in this case, the battery is always online and v out-sys tracks bat voltage. design files for this circuit board are available at http://www.linear.com/demo/dc1830b-a specifications are at t a = 25c symbol parameter conditions min typ max units v in input supply range this is the input voltage of the front end dc/dc supply 20 60 v i in input current limit this is the input current limit set by the ltc4000 3 a v float battery float voltage 14.4 14.6 14.8 v output regulation line and load (20v to 60v, 0a to 4.5a) 0.005 % i bat battery charge current 5 a battery charge current C trickle 0.6 a t t charge termination time v bat = v float 2.9 hours v out-sys system output voltage 12.3 14.6 15.5 v i out-sys system output current range *input current limited below 35v in 0 5.5* a dc1830babbf demo manual dc1830b-a/dc1830b-b
2 quick start procedure demonstration circuit 1830 is offered for use in combina - tion with a front end dc/dc converter, and will need to be customized to suit the intended application. it has been supplied with components for a design as outlined in the performance summary, and tested in conjunction with the ltc3845a buck converter that it was tailored to. a sepa - rate demonstration board is available for the ltc4000/ ltc3789 buck-boost combination, the dc1721 a. the ltc4000 data sheet should be used for guidance in deter - mining circuit values for the application at hand. you may follow the design example on page 26 of the data sheet. table 1 provides a summary of parameter adjustments. note: the pfets supplied on this board are rated at 30v. once the circuit has been customized to suit the appli - cation at hand, it is easy to set up to evaluate the per - formance of the ltc4000 when combined with a suit - able switching power converter, such as the ltc3845a. voltages and currents cited in this procedure are for the design as delivered; if the design has been customized, substitute the appropriate values. refer to figure 1 for proper measurement equipment setup and follow the procedure below: warning: batteries are potentially dangerous high energy sources. improper connection, overcharge, or rapid discharge could result in explosion and/or fire. 1. set an input power supply that is capable of 60v and 3a, to 24v. then turn off the supply. 2. with power off, connect the supply to the input ter - minals vin and gnd. note : a. input voltages lower than 20v can keep the con - verter from turning on due to the undervoltage lockout feature of the ltc4000. b. if efficiency measurements are desired, refer to figure 1 for the test setup. 3. set charge jumper to enable. 4. turn on the power at the input. note: make sure that the input voltage never exceeds 60v . 5. check for the proper bat output voltage of 14.6v. turn off the power at the input. 6. now that the proper output voltage is established, connect a variable load capable of sinking 6a at 16v to the output terminals bat and gnd. set the current for 0a. 7. turn on the power at the input. note : if there is no output, temporarily disconnect the load to make sure that the load is not set too high. 8. once the proper bat output voltage is again estab - lished, adjust the load and/or sour ce within the oper - ating range and observe the battery float voltage regu - lation, charge current, and other desired parameters. 9. set the load to constant voltage mode to more easily observe charge current and trickle charge current. note : the following applies to the dc1830b-a. note: operation in the instant-on region (v out < 12.5v ) may engage thermal limit circuit to protect q2 in the linear region. note : the optional thermal limit circuit for q1 (q5, rntc3, r8 to 12, and u2) is included to protect q1 in case of an extended short-circuit on vout-sys under adverse thermal conditions (t a > 40 c ). it may not be needed in applications with less severe thermal condi - tions, lower current available to vout-sys, or where continuous short-circuit protection on vout-sys is not required. dc1830babbf demo manual dc1830b-a/dc1830b-b
3 quick start procedure table 1. ltc4000 charger setup parameters and reference values reference description nominal value (v)* min/max conditions i il input current regulation/limit (50a ? r il )/20 45/55 50mv max i cl charge current regulation/limit (50a ? r cl )/20 45/55 50mv max i cl trickle charge current regulation/limit (5a ? r cl )/20 4.5/5.5 v bat-float battery float voltage 1.136v 1.125/1.147 v out system voltage 1.193v 1.181/1.204 charger off (follows v bat ) charger float (follows v bat ) charging at i cl , 0.86v bat-float < v bat < v bat-float 0.86 ? 1.136v 0.82/0.90 instant-on, 0.68v bat-float < v bat < 0.86v bat-float 0.86 ? 1.136v 0.82/0.90 instant-on, trickle, v bat < 0.68v bat-float vm input voltage monitor/uvlo 1.193v 1.181/1.204 falling, (40mv hysteresis) cx c/x monitor/charge termination (5a ? r cx C 10mv)/20 4.5/5.5 short tmr to bias for c/x termination tmr charge termination timer 104s/nf 83/126 *normalized to sense point 10. turn off the power at the input. 11. connect the output load and meters to the vout-sys output. 12. set charge jumper to disable. 13. turn on the power at the input. 14. once the proper vout-sys is again established, adjust the load and/or source within the operating range and observe the output voltage regulation, rip - ple voltage, efficiency, input and output current limit, and other desired parameters. dc1830babbf demo manual dc1830b-a/dc1830b-b
4 quick start procedure figure 1. fixture connections and measurement equipment setup ? + + ? + ? ? + dc source + ? load or + ? scope dc1830babbf demo manual dc1830b-a/dc1830b-b
5 5 5 4 4 3 3 2 2 1 1 d d c c b b a a 10-36 vin, step-up/down dc/dc converter rsense-input ltc4000 system control loops a5 a7 a6 a4 rsense-charge dc - dc converter vc / ith ltc4000 gm gm gm gm battery load rst shdn size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com a3 friday, june 29, 2012 12 16.8v, 5a battery charger with high efficiency, ak david b. n/a LTC4000EGN, ltc3789egn demo circuit 1721a size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com a3 friday, june 29, 2012 12 16.8v, 5a battery charger with high efficiency, ak david b. n/a LTC4000EGN, ltc3789egn demo circuit 1721a size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com a3 friday, june 29, 2012 12 16.8v, 5a battery charger with high efficiency, ak david b. n/a LTC4000EGN, ltc3789egn demo circuit 1721a revision history description date approved eco rev david b. 1st prototype 1 08-20-10 __ revision history description date approved eco rev david b. 1st prototype 1 08-20-10 __ revision history description date approved eco rev david b. 1st prototype 1 08-20-10 __ gnd gnd gnd gnd bat bat vin vin vout-sys vout-sys figure 2. block diagram with typical dc/dc converter quick start procedure dc1830babbf demo manual dc1830b-a/dc1830b-b
6 parts list item qty reference part description manufacturer/part number dc1830b-a required circuit components 1 1 c1 cap., x5r, 4.7f, 10v, 20% 0603 avx, 0603zd475mat2a 2 1 cbat cap., smt aluminum, 150f, 35v suncon, 35hvp150m 3 1 cbias cap., x7r, 1f, 16v, 10% 0603 avx, 0603yc105kat2a 4 1 cbgate cap., x7r, 10nf, 50v, 5% 0603 murata, grm188r71h103ja01d 5 2 cc2, ctmr cap., x7r, 0.1f, 50v, 10% 0603 avx, 06035c104kat2a 6 2 ciimon, cibmon cap., c0g, 1000pf, 25v, 5% 0603 avx, 06033a102jat2a 7 1 cin cap., x7r, 1f, 50v, 10% 1210 avx, 12105c105kat2a 8 2 cout, cl cap., x7r, 2.2f, 50v, 10% 1206 murata, grm31cr71h225ka88l 9 1 d1 diode zener 3.0v 200mw sod-323 diode inc., bzt52c3v0s-7-f 10 1 d2 led, green, smt, 0603 lite-on, ltst-c190kgkt 11 2 d3, d4 led 660nm super red diff 0603 smd lumex, sml-lx0603srw-tr 12 1 f2 fuse 12a 32v t-lag 1206 smd cooper bussman, 3216td12-r 13 2 q1, q2 mosfet p-chan., 30v, powerpak-8 vishay, si7135dp-t1-ge3 14 2 q5, q6 small signal mosfet on semi., 2n7002lt1g 15 2 rbfb2, rofb2 res., chip., 84.5k, 0.1w, 1% 0603 vishay, crcw060384k5fkea 16 4 rbfb1, rofb1, r12, r17 res., chip., 1m, 0.1w, 1% 0603 vishay, crcw06031m00fkea 17 1 rc1 res., chip 4.22k 1/10w 1% 0603 yageo, rt0603fre074k22l 18 1 rcl res., chip., 24.3k, 0.1w, 1% 0603 vishay, crcw060324k3fkea 19 1 rcs sensor res., 0.01 1w 2% 1508 smd susumu, rl3720 wt- r010-g 20 3 rcx, r8, r13 res., chip., 10k, 0.1w, 1% 0603 yageo, rc0603fr-0710kl 21 1 ris1 sensor res 0.015 1w 2% 1508 smd susumu, rl3720 wt- r015-g 22 1 ril res., chip., 18.2k, 0.1w, 1% 0603 vishay, crcw060318k2fkea 23 2 rntc2, rntc3, thermistor ntc 10k 5% 0603 vishay, nths0603n02n1002j 24 1 rv m1 res., chip 35.7k 1/10w 1% 0603 vishay, crcw060335k7fkea 25 1 rv m2 res., chip 2.49k 1/10w 1% 0603 yageo, rc0603fr-072k49l 26 1 r5 res., chip., 2.2k, 0.1w, 5% 0603 vishay, crcw06032k2jkea 27 3 r4, r7, r19 res., chip., 100k, 0.1w, 5% 0603 vishay, crcw0603100kjkea 28 2 r6, r18 res., chip., 4.7k, 0.1w, 5% 0603 vishay, crcw06034k7jkea 29 1 r9 res., chip., 46.4k, 0.1w, 1% 0603 vishay, crcw060346k4fkea 30 2 r10, r15 res., chip., 20k, 0.1w, 1% 0603 vishay, crcw060320k0fkea 31 2 r11, r16 res., chip., 38.3k, 0.1w, 1% 0603 vishay, crcw060338k3fkea 32 1 r14 res., chip., 78.7k, 0.1w, 1% 0603 vishay, crcw060378k7fkea 33 1 u1 i.c. ltc4000eufd, 28pin qfn linear tech., ltc4000eufd#pbf 34 2 u2, u3 nanop wr comp arator, msop8 linear tech., ltc1540cms8#pbf dc1830babbf demo manual dc1830b-a/dc1830b-b
7 parts list item qty reference part description manufacturer/part number additional demo board circuit components 1 0 cc1, cigate, cntc, ccx, ccl, cil, cvm cap., 0603 opt 2 0 cl1, cl2, cl3, cl4, cl5 cap., 1206, 50v opt 3 0 f1, f3 fuse 12a 32v t-lag 1206 smd opt 4 0 q3, q4 mosfet p-chan., 30v, powerpak-8 opt 5 0 r1, r2, r3, r20, r21, rig, rbg, rifb1, rbfbx, rbfb3, rofbx res., 0603 opt hardware: for demo board only 1 16 e1 - e6, e9 - e14, e18, e19, e20, e21 testpoint, turret, 0.061" pbf mill-max, 2308-2-00-80-00-00-07-0 2 5 e7, e8, e15, e16, e17 testpoint, turret, 0.094" pbf mill-max, 2501-2-00-80-00-00-07-0 3 4 jp1, jp2, jp3, jp4 header, 3 pin 0.079 single row samtec, tmm-103-02-l-s 4 4 xjp1, xjp2, xjp3, xjp4 shunt, 0.079" center samtec, 2sn-bk-g 5 9 j1, j2, j3, j4, j5, j6, j7, j8, j9 connector, banana jack keystone, 575-4 6 4 mtg1, mtg2, mtg3, mtg4 stand-off, nylon (snap on), 0.50" tall keystone, 8833(snap on) dc1830babbf demo manual dc1830b-a/dc1830b-b
8 item qty reference part description manufacturer/part number dc1830b-b required circuit components 1 1 c1 cap., x5r, 4.7f, 10v, 20% 0603 avx, 0603zd475mat2a 2 1 cbat cap., smt aluminum, 150f, 35v suncon, 35hvp150m 3 1 cbias cap., x7r, 1f, 16v, 10% 0603 avx, 0603yc105kat2a 4 2 cc2, ctmr cap., x7r, 0.1f, 50v, 10% 0603 avx, 06035c104kat2a 5 2 ciimon, cibmon cap., c0g, 1000pf, 25v, 5% 0603 avx, 06033a102jat2a 6 1 cout cap., x7r, 2.2f, 50v, 10% 1206 murata, grm31cr71h225ka88l 7 1 cin cap., x7r, 1f, 50v, 10% 1210 avx, 12105c105kat2a 8 1 d1 diode zener 3.0v 200mw sod-323 diode inc., bzt52c3v0s-7-f 9 2 d2, d3 led 660nm super red diff 0603 smd lumex, sml-lx0603srw-tr 10 1 d4 led, green, smt, 0603 lite-on, ltst-c190kgkt 11 1 f2 fuse 12a 32v t-lag 1206 smd cooper bussman, 3216td12-r 12 1 q1 mosfet p-chan., 30v, powerpak-8 vishay, si7135dp-t1-ge3 13 2 rbfb1, rofb1 res., chip., 1m, 0.1w, 1% 0603 vishay, crcw06031m00fkea 14 1 rbfb2 res., chip., 84.5k, 0.1w, 1% 0603 vishay, crcw060384k5fkea 15 1 rc1 res., chip 4.22k 1/10w 1% 0603 yageo, rt0603fre074k22l 16 1 rcl res., chip., 24.3k, 0.1w, 1% 0603 vishay, crcw060324k3fkea 17 1 rcs sensor res., 0.01 1w 2% 1508 smd susumu, rl3720 wt- r010-g 18 2 rcx, r21 res., chip., 0.0, 0.1w, 0603 vishay, crcw06030000z0ea 19 1 ril res., chip., 18.2k, 0.1w, 1% 0603 vishay, crcw060318k2fkea 20 1 ris1 sensor res 0.015 1w 2% 1508 smd susumu, rl3720 wt- r015-g 21 1 rv m1 res., chip 35.7k 1/10w 1% 0603 vishay, crcw060335k7fkea 22 1 rv m2 res., chip 2.49k 1/10w 1% 0603 yageo, rc0603fr-072k49l 23 3 r4, r7, r19 res., chip., 100k, 0.1w, 5% 0603 vishay, crcw0603100kjkea 24 1 r5 res., chip., 2.2k, 0.1w, 5%, 0603 vishay, crcw06032k2jkea 25 2 r6, r18 res., chip., 4.7k, 0.1w, 5% 0603 vishay, crcw06034k7jkea 26 1 r22 0 thick film jumper chip, 2010 irc., lrc-lrz-2010lf-r000 27 1 u1 i.c. ltc4000eufd, 28pin qfn linear tech., ltc4000eufd#pbf parts list dc1830babbf demo manual dc1830b-a/dc1830b-b
9 parts list item qty reference part description manufacturer/part number additional demo board circuit components 1 0 cc1, cbgate, cigate, cntc, ccx, ccl, cil, cvm cap., 0603 opt 2 0 cl, cl1, cl2, cl3, cl4, cl5 cap., 1206, 50v opt 3 0 f1, f3 fuse 12a 32v t-lag 1206 smd opt 4 0 rntc2, rntc3 thermistor ntc 10k 5% 0603 opt vishay, nths0603n02n1002j 5 0 r1, r2, r3, r20, rig, rbg, rifb1, rbfbx, rbfb3, rofbx, rofb2 res., 0603 opt 6 0 r8, r13 res., chip., 10k, 0.1w, 1% 0603 opt yageo, rc0603fr-0710kl 7 0 r9 res., chip., 46.4k, 0.1w, 1% 0603 opt vishay, crcw060346k4fkea 8 0 r10, r15 res., chip., 20k, 0.1w, 1% 0603 opt vishay, crcw060320k0fkea 9 0 r11, r16 res., chip., 38.3k, 0.1w, 1% 0603 opt vishay, crcw060338k3fkea 10 0 r12, r17 res., chip., 1m, 0.1w, 1% 0603 opt vishay, crcw06031m00fkea 11 0 r14 res., chip., 78.7k, 0.1w, 1% 0603 opt vishay, crcw060378k7fkea 12 0 q3, q4 mosfet p-chan., 30v, powerpak-8 opt 13 0 q5, q6 small signal mosfet opt on semi., 2n7002lt1g 14 0 u2, u3 nanopwr comparator, msop8 opt linear tech., ltc1540cms8#pbf hardware: for demo board only 1 16 e1 - e6, e9 - e14, e18, e19, e20, e21 testpoint, turret, 0.061" pbf mill-max, 2308-2-00-80-00-00-07-0 2 5 e7, e8, e15, e16, e17 testpoint, turret, 0.094" pbf mill-max, 2501-2-00-80-00-00-07-0 3 4 jp1, jp2, jp3, jp4 header, 3 pin 0.079 single row samtec, tmm-103-02-l-s 4 4 xjp1, xjp2, xjp3, xjp4 shunt, 0.079" center samtec, 2sn-bk-g 5 9 j1, j2, j3, j4, j5, j6, j7, j8, j9 connector, banana jack keystone, 575-4 6 4 mtg1, mtg2, mtg3, mtg4 stand-off, nylon (snap on), 0.50" tall keystone, 8833(snap on) dc1830babbf demo manual dc1830b-a/dc1830b-b
10 figure 3. schematic, dc1830a schematic diagram 5 5 4 4 3 3 2 2 1 1 d d c c b b a a thermal regulation for q2 during 'instant-on' operation optional thermal protection for q1 during vout-sys short circuit gnd gnd gnd vout vin+ opt opt gnd cl1 - cl5 1206 x 5 plcs 3v - 60v from dc / dc * * note: unless otherwise specified 1. all resistors are in ohms, 0603. all capacitors are in microfarads, 0603. * not on the board opt not loaded 0 ohm reg ckt. for q2 opt si7135dp * rofb2 10.0k loaded opt 2.2uf 0 ohm assy cbgate loaded 10nf opt cl q2 / r22 not loaded r21 84.5k rcx tp ckt. for q1 -d u1 ltc4000 ltc4000-1 ltc4000 ltc4000-1 -c -a -b * sod323 lrc-lrz-2010lf-r000 loaded not loaded loaded not loaded opt 0 ohm si7135dp 84.5k opt 10.0k 0 ohm opt 2.2uf opt 10nf lrc-lrz-2010lf-r000 / r22 ril rifb1 68.1k 68.1k opt opt 18.2k 18.2k 2k 2k to dc / dc enable disable disable enable enable disable 3v - 30v bias ntc bias bias bias il/ifb il/ifb bias bias bias bias il/ifb ntc size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 1 demo circuit 1830b - a / b / c / d 1 1 battery charger control and power management n/a ltc4000eufd / ltc4000eufd - 1 nc dave b. 07 - 03 - 12 size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 1 demo circuit 1830b - a / b / c / d 1 1 battery charger control and power management n/a ltc4000eufd / ltc4000eufd - 1 nc dave b. 07 - 03 - 12 size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 1 demo circuit 1830b - a / b / c / d 1 1 battery charger control and power management n/a ltc4000eufd / ltc4000eufd - 1 nc dave b. 07 - 03 - 12 revision history description date approved eco rev david b. production fab - 1 07 - 03 - 12 revision history description date approved eco rev david b. production fab - 1 07 - 03 - 12 revision history description date approved eco rev david b. production fab - 1 07 - 03 - 12 rcx * r21 0 q3 4 5 1 2 3 6 7 8 e16 ibmon rbfb1 1m e8 flt r11 38.3k j9 gnd r3 opt q2 * 4 5 1 2 3 6 7 8 j7 bat cvm opt r5 2.2k cil opt cbias 1uf 16v cout 2.2uf 1206 50v r6 4.7k e4 f2 fuse e22 gnd d3 red r9 46.4k e5 cibmon 1000pf e6 ccl opt j6 vout- sys c1 4.7uf 10v e18 rst rig opt opt r19 100k r8 10k jp4 chrg_led rntc3 10k + cbat 150uf 35v rbfb2 84.5k e10 gnd e12 e19 ith ril * f1 opt fuse r20 opt ltc4000eufd / ltc4000eufd - 1 u1 vm 1 rst 2 iimon 3 il / ifb 4 enc 5 ibmon 6 cx 7 cl 8 tmr 9 gnd 10 flt 11 chrg 12 bias 13 ntc 14 fbg 15 bfb 16 bat 17 bgate 18 csn 19 csp 20 ofb 21 igate 22 iid 23 ith 24 cc 25 cln 26 in 27 gnd 28 gnd 29 j1 vout r12 1meg j3 vin q1 si7135dp 4 5 1 2 3 6 7 8 rc1 4.22k cigate opt jp2 enable disable charge e17 iimon d1 bzt52c3v0s-7-f 1 2 d2 green ccx opt q6 2n7002l 1 3 2 + - u3 ltc1540cms8 gnd 1 v- 2 in+ 3 in- 4 hyst 5 6 ref 6 v+ 7 out 8 cc2 0.1uf jp3 flt_led rofbx opt rvm2 2.49k rbg opt r1 opt f3 opt fuse ris1 0.015 rntc2 10k q4 4 5 1 2 3 6 7 8 e9 led_pwr rifb1 * d4 red cbgate * rcs 0.01 e14 gnd e20 pullup e7 chrg j8 gnd rvm1 35.7k jp1 rst_led e11 vout- sys + - u2 ltc1540cms8 gnd 1 v- 2 in+ 3 in- 4 hyst 5 6 ref 6 v+ 7 out 8 rofb2 * r4 100k r15 20k j5 gnd r2 opt e21 gnd rbfbx opt r18 4.7k rbfb3 opt cc1 opt e15 ntc r10 20k e1 r13 10k rofb1 1m rcl 24.3k e13 bat r7 100k r14 78.7k r17 1meg cin 1uf 1210 50v ctmr 0.1uf cl * 1206 50v j4 vin+ r16 38.3k cntc opt j2 gnd e3 vin q5 2n7002l 1 3 2 ciimon 1000pf e2 tmr tmr chrgb chrgb chrgb dc1830babbf demo manual dc1830b-a/dc1830b-b
11 information furnished by linear technology corporation is believed to be accurate and reliable. however, no responsibility is assumed for its use. linear technology corporation makes no representa - tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. figure 4. schematic, modified dc1619a as used with dc1830a schematic diagram 1 1 2 2 a a b b cont burst pulse skip run shdn . notes:unless otherwise specified resistors: ohms, 0402 capacitors: uf, 0402 * 79v capacitor surge voltage * l1 layout pads are non-standard pads designed to accommodate the wurth elektronic, 74435561100 inductor or the wurth elektronic, 7443551151 inductor 47uf 20v 10uf 25v 196k 0.014 ltc4000 ith ltc4000 rst modified for dc1830a application modifications for dc1830a application r4 196k r17 0.014 cout1 47uf, 20v sanyo 20tqc47myf cout3 10uf, 25v murata grm32dr71e106ka12 vfb vs+ vfb vcc vcc vout bg vout vcc tg vin sw revision history description date approved eco rev marty m. production fab - 2 11-15-10 revision history description date approved eco rev marty m. production fab - 2 11-15-10 revision history description date approved eco rev marty m. production fab - 2 11-15-10 size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 2 demo circuit 1619a 1 2 high voltage synchronous buck n/a lt3845aefe nc marty m. controller with adjustable operating frequency 11-15-10 size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 2 demo circuit 1619a 1 2 high voltage synchronous buck n/a lt3845aefe nc marty m. controller with adjustable operating frequency 11-15-10 size date: ic no. rev. sheet of title: approvals pcb des. app eng. technology fax: (408)434-0507 milpitas, ca 95035 phone: (408)432-1900 1630 mccarthy blvd. ltc confidential-for customer use only customer notice linear technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customer's responsibility to verify proper and reliable operation in the actual application. component substitution and printed circuit board layout may significantly affect circuit performance or reliability. contact linear technology applications engineering for assistance. this circuit is proprietary to linear technology and schematic supplied for use with linear technology parts. scale = none www.linear.com 2 demo circuit 1619a 1 2 high voltage synchronous buck n/a lt3845aefe nc marty m. controller with adjustable operating frequency 11-15-10 cin3 2.2uf 100v 1210 cin3 2.2uf 100v 1210 c2 1500pf c2 1500pf r13 0 r13 0 j2 20v - 60v vin j2 20v - 60v vin l1 10uh* l1 10uh* c9 220pf 100v 1206 c9 220pf 100v 1206 c1 0.47uf 100v 1206 c1 0.47uf 100v 1206 r12 0 r12 0 r5 16.2k 1% r5 16.2k 1% j4 vout 15v, 75w j4 vout 15v, 75w r8 100k r8 100k r7 20k r7 20k e5 gnd e5 gnd cout4 1210 (opt) cout4 1210 (opt) e3 sync e3 sync q1 bsc123n08n q1 bsc123n08n r17 0.007 2512 r17 0.007 2512 c7 1uf 16v 0603 c7 1uf 16v 0603 cout3 22uf 16v 1210 cout3 22uf 16v 1210 j1 gnd j1 gnd q2 bsc123n08n q2 bsc123n08n + cout2 (opt) + cout2 (opt) bg bg c3 (opt) c3 (opt) c8 (opt) c8 (opt) r4 143k 1% r4 143k 1% r10 4.99 r10 4.99 r1 1m r1 1m cin4 2.2uf 100v 1210 cin4 2.2uf 100v 1210 e4 vout e4 vout c5 1500pf c5 1500pf r3 5.1m 5% r3 5.1m 5% d1 bas521 d1 bas521 jp2 mode jp2 mode r16 6.65 1206 r16 6.65 1206 jp1 jp1 r14 0 r14 0 tg tg c4 100pf c4 100pf r11 0 r11 0 r9 49.9k r9 49.9k j3 gnd j3 gnd u1 lt3845aefe u1 lt3845aefe vfb burst_en ss shdn vin boost tg sw vcc vc sync fset sgnd bg pgnd sense- sense+ d3 1n4148 d3 1n4148 r6 (opt) r6 (opt) e1 vin e1 vin d2 b160 d2 b160 + cin2 33uf 63v* + cin2 33uf 63v* r15 0 r15 0 + cin1 33uf 63v* + cin1 33uf 63v* 10k 10k e2 gnd e2 gnd c6 0.1uf 16v c6 0.1uf 16v + cout1 68uf 16v + cout1 68uf 16v r2 97.6k r2 97.6k dc1830babbf demo manual dc1830b-a/dc1830b-b
12 ? linear technology corporation 2017 lt 0717 ? printed in usa demonstration board important notice linear technology corporation (ltc) provides the enclosed product(s) under the following as is conditions: this demonstration board (demo board) kit being sold or provided by linear technology is intended for use for engineering development or evaluation purposes only and is not provided by ltc for commercial use. as such, the demo board herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. as a prototype, this product does not fall within the scope of the european union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. if this evaluation kit does not meet the specifications recited in the demo board manual the kit may be returned within 30 days from the date of delivery for a full refund. the foregoing warranty is the exclusive warranty made by the seller to buyer and is in lieu of all other warranties, expressed, implied, or statutory, including any warranty of merchantability or fitness for any particular purpose. except to the extent of this indemnity, neither party shall be liable to the other for any indirect, special, incidental, or consequential damages. the user assumes all responsibility and liability for proper and safe handling of the goods. further, the user releases ltc from all claims arising from the handling or use of the goods. due to the open construction of the product, it is the users responsibility to take any and all appropriate precautions with regard to electrostatic discharge. also be aware that the products herein may not be regulatory compliant or agency certified (fcc, ul, ce, etc.). no license is granted under any patent right or other intellectual property whatsoeve r. ltc assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. ltc currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. please read the demo board manual prior to handling the product. persons handling this product must have electronics training and observe good laboratory practice standards. common sense is encouraged. this notice contains important safety information about temperatures and voltages. for further safety concerns, please contact a ltc application engineer. mailing address: linear technology 1630 mccarthy blvd. milpitas, ca 95035 copyright ? 2004, linear technology corporation dc1830babbf demo manual dc1830b-a/dc1830b-b

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