 |
Datenblatt-Suchmaschine für elektronische Bauteile |
|
|
Datenblatt-Suchmaschine für elektronische Bauteile |
|
LT1952IGN Datenblatt(PDF) 22 Page - Linear Technology |
|
|
|||||||||||||||||||||||||||||
LT1952IGN Datenblatt(HTML) 22 Page - Linear Technology |
|
|
22 / 24 page  LT1952 22 1952f APPLICATIO S I FOR ATIO Figure 18. 36V to 72V, 3.3V at 40A Synchronous Forward Converter Figure 17. LT1952-Based Synchronous Forward Converter Efficiency vs Load Current (For Circuit in Figure 18) 36V to 72V Input, 3.3V 40A Converter An LT1952-based synchronous forward converter pro- vides the ideal solution for power supplies requiring high efficiency at low output voltages and high load currents. The 3.3V 40A solution in Figure 18 achieves peak efficien- cies of 92.5% (Figure 17) by minimizing power loss due to rectification at the output. Synchronous rectifier control output SOUT, with programmable delay, optimizes timing control for a secondary side synchronous MOSFET con- troller (LTC3900) which results in high efficiency synchro- nous rectification. The LT1952 uses a precision current limit threshold at the OC pin combined with a soft-start hiccup mode to provide low stress output short circuit protection. The maximum output current will vary only 10% over the full VIN range. During short circuit the average power dissipation of the circuit will be lower than 15% of maximum rated power thanks to a soft-start OUTPUT CURRENT (A) 010 50 1952 F17 20 30 40 94 93 92 91 90 89 88 87 86 VIN = 48V VOUT = 3.3V fOSC = 300kHz • • • LTC3900 8V BIAS VU1 VU1 220pF BAT760 8V BIAS 3 FG 5 CG +VIN 36V TO 72V PA0912.002 BAS516 BCX55 VOUT 3.3V, 40A 10k 10k 10k 1nF 8V BIAS 1µF 15k 560Ω COUT 100µF 3x 0.1µF 2.2µF 1nF 12V Q2 PH3230 2x Q3 PH3230 2x 18V 270Ω PS8101 T2 Q4470-B 2.2nF VU1 18k 249k 80.6k 1µF 0.1µF 10k 10k 82k 47k 4 3 5 4 8 2 1 LT1009 LT1797 1952 F18 L1 SD_VSEC OUT LT1952 714 ROSC VIN 315 BLANK GND 98 SS_MAXDC PGND 513 DELAY 12 VR = 2.5V OC 611 COMP ISENSE 110 FB = 1.23V SOUT 216 Si7846 1 GND 6 CS+ 2 VCC 4 CS– 7 SYNC 8 TIMER 370k 10mΩ 1µF 470Ω 39k 13.2k 115k 27k 0.22µF 0.1µF 10k 59k 33k 2.2k 22k L1: PA0713, PULSE ENGINEERING ALL CAPACITORS X7R, CERAMIC, TDK T2: COILCRAFT controlled hiccup mode. This allows a significant reduc- tion in power component sizing using the LT1952-based converter. |
|
|
Link URL |
| War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Link zum Datenblatt | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
German ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
