5 4 3 VAUX1 DUAL PKG E1 1 REVISION HISTORY Q1A 7 6 VAUX1 2 ECO S1A SiA921EDJ 1 JMP1 S1A REV * 2 DESCRIPTION APPROVED 2ND PROTOTYPE JOSH Y. DATE 11-9-10 J1 3V - 18V @ 2A R1 680K 2 VAUX1 GND1 J2 D GND1 D Q1B E2 VIN1 8 3 VIN1 VOUT1 SiA921EDJ 4 S1B VOUT1 E9 E3 U1 VIN1 LTC4412HVIS6 JMP2 2.5V - 18V @ 2A * VOUT1 5 S1B J3 1 CIN1 0.1uF 50V 0805 GND1 J4 GND1 E4 2 VIN SENSE GND GATE 6 VOUT1 5 GATE1 J9 COUT1 0.1uF 50V 0805 R5 0 GND1 STAT1 CTL1 3 CTL1 E13 CTL 4 STAT GND1 J10 GATE1 2.5V - 18V @ 2A E10 STAT1 STAT1 E14 R2 C 560K VCC1 CTL1 C VCC1 E15 (OPT) ISOLATED VAUX2 8 7 6 5 E5 VAUX2 VAUX2 Q2 Si7463DP 3 2 1 4 VAUX2 S2A JMP3 NOTE FOR THIS PAGE: * VOUT2 R3 100K J5 5V - 36V @ 8A S2A E11 VOUT2 J11 GND2 COUT2 0.1uF 50V 0805 J6 S2B GND2 E6 B 8 7 6 5 VIN2 VIN2 TOP LAYER CIRCUITS FOR U1 AND U2 ARE ELECTRICALLY ISOLATED FROM EACH OTHER. THEY DO NOT SHARE GND, VIN, VAUX, OR VOUT. JUMPERS CAN BE USED TO PARALLEL THE TWO CIRCUITS AS NECESSARY. VOUT2 Q3 Si7463DP 3 2 1 S2B JMP4 * 5V - 36V @ 8A GND2 # IF THE CTL PIN OF THE LTC4412 AND/OR LTC4414 IS NOT USED, IT IS RECOMENDED THAT CTL BE CONNECTED TO GND IN THE FINAL DESIGN. J12 E12 *CLARIFICATION: SHOWN HERE AS CONNECTED FOR TOP LAYER CIRCUIT, BUT STUFFED ON BOTTOM LAYER. B GND2 E7 VIN2 LTC4414EMS8 4 U2 J7 5V - 36V @ 8A VIN2 CIN2 0.1uF 50V 0805 GND2 7 VIN SENSE GND GATE CTL STAT 6 VOUT2 GATE2 STAT2 3 8 GATE2 E16 J8 GND2 R6 E8 CTL22 CTL2 R4 STAT2 NC NC 5 E18 CTL2 560K NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. 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 SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 VCC2 4 3 VCC2 E17 (OPT) 0 4 A 1 STAT2 APPROVALS PCB DES. APP ENG. TECHNOLOGY AK JOSH Y. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC DUAL LOW LOSS 36V POWERPATH CONTROLLERS SIZE N/A SCALE = NONE 2 DATE: IC NO. LTC4412HVIS6 & LTC4414EMS8 DEMO CIRCUIT 1635A Monday, December 17, 2012 SHEET 1 1 REV. 2 OF 3 A 5 4 3 2 OPTIONAL CIRCUIT Q4 Q5 Si7463DP (OPT) 3 2 1 8 7 6 5 3 2 1 S1A 4 VAUX1 Si7463DP (OPT) S1A 4 VAUX1 8 7 6 5 1 STJ1 STJ1 D D Q7 Si7463DP (OPT) 8 7 6 5 VIN1 VIN1 7 3 CTL1 CTL1 2 S1B LTC4414EMS8 (OPT) S1B 8 7 6 5 3 2 1 VIN SENSE GND GATE CTL STAT 6 VOUT1 8 GATE1 1 STAT1 4 3 2 1 4 U3 Q8 Si7463DP (OPT) GTJ1 GTJ1 VOUT1 GATE1 STAT1 C C 4 NC NC 5 ISOLATED OPTIONAL CIRCUIT VAUX2 DUAL PKG Q12A 7 6 VAUX2 DUAL PKG Q13A OPT (SiA921EDJ) 1 S2A OPT (SiA921EDJ) 7 1 6 Q12B B 8 3 Q13B OPT (SiA921EDJ) 4 VIN2 VIN2 1 2 CTL2 CTL2 3 VIN SENSE GND GATE CTL STAT S2B S2B 6 VOUT2 5 GATE2 4 STAT2 GATE2 STAT2 CUSTOMER NOTICE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 GTJ2 VOUT2 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. A B OPT (SiA921EDJ) 8 4 3 5 LTC4412HVIS6 (OPT) 5 U4 STJ2 2 2 S2A 3 APPROVALS PCB DES. APP ENG. TECHNOLOGY AK JOSH Y. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC DUAL LOW LOSS 36V POWERPATH CONTROLLERS SIZE N/A SCALE = NONE DATE: 2 IC NO. LTC4412HVIS6 & LTC4414EMS8 DEMO CIRCUIT 1635A Monday, December 17, 2012 SHEET 2 1 REV. 2 OF 3 A 5 4 3 2 1 OPTIONAL CIRCUIT DUAL PKG DUAL PKG 1 SiA921EDJ VOUT1 4 S1B S1B 2 S1A 7 6 JMP5 0 STAT1 8 3 VOUT1 VAUX1 VAUX1 JMP6 STJ1 S1A 8 7 5 SiA921EDJ Q19A Si7905DN 1 1 STJ1 STAT1 0 D 8 7 2 D DUAL PKG Q18A Si7905DN Q6B VOUT1 2 Q6A STJ1 GTJ1 GATE1 Q18B Si7905DN S1B 6 5 3 6 5 3 4 VIN1 4 VIN1 Q19B Si7905DN GTJ1 C GATE1 C GTJ1 ISOLATED OPTIONAL CIRCUIT NOTE FOR ALL CIRCUITS: S2A Q16B Si7905DN STAT2 8 7 6 5 0 4 JMP8 STJ2 Q16A Si7905DN STJ2 8 7 VIN2 GTJ2 GATE2 Q17B Si7905DN 1 S2B S2B VOUT2 6 5 3 GTJ2 GTJ2 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. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 B THERE ARE MORE GUIDELINES SPECIFICALLY FOR CERTAIN CIRCUITS. PLEASE SEE THE QUICK START GUIDE FOR MORE APPLICATIONS AND INFORMATION. VOUT2 3 2 1 GATE2 1. NEVER INSTALL U1 (TOP LAYER) AND U3 (BOTTOM LAYER) AT THE SAME TIME. INSTALL ONE OR THE OTHER, BUT NOT BOTH. 2. NEVER INSTALL U2 (TOP LAYER) AND U4 (BOTTOM LAYER) AT THE SAME TIME. SAME AS 1. 3. JMP1-4 ARE MEANT FOR SIMPLE DIODE-OR OPERATION. THEY MUST BE REMOVED FOR PROPER BACK-TO-BACK ISOLATION. STJ2 Q15 Si7463DP S2B 8 7 1 4 0 4 STAT2 JMP7 2 S2A 3 S2A 2 3 2 1 6 5 VAUX2 8 7 6 5 B Q17A Si7905DN 4 Q14 Si7463DP THE DEMO BOARD AS SHIPPED SHOWS THE MOST COMMON FUNCTIONS FOR TWO ELECTRICALLY ISOLATED CIRCUITS. THIS DEMO BOARD WAS DESIGNED TO SHOW CASE THE MAXIMUM NUMBER OF EVALUATION OPTIONS THAT CORRESPOND TO THE CIRCUITS IN THE DATA SHEETS BOTH ICs. HOWEVER, THERE ARE SOME IMPORTANT RULES TO ALWAYS FOLOW: DUAL PKG DUAL PKG 4 3 APPROVALS PCB DES. APP ENG. TECHNOLOGY AK JOSH Y. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC DUAL LOW LOSS 36V POWERPATH CONTROLLERS SIZE N/A SCALE = NONE 2 DATE: IC NO. LTC4412HVIS6 & LTC4414EMS8 DEMO CIRCUIT 1635A Monday, December 17, 2012 SHEET 3 1 REV. 2 OF 3 A