 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LM5046 Datasheet(PDF) 12 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
LM5046 Datasheet(HTML) 12 Page - Texas Instruments |
|
|
12 / 49 page  HS1 HO1 BST1 LO1 VCC SR1 SR2 RD1 REF REF HS2 HO2 BST2 VCC RD2 LO2 VOLTAGE REGULATOR VCC UVLO 5V REFERENCE LOGIC OSCILLATOR DRIVER LOGIC VIN UVLO OVP RT RAMP SSSR COMP CS SS RES AGND PGND REF VCC 0.4V 1.25V SHUTDOWN STANDBY UVLO HYSTERESIS 20 éA 1.25V HYSTERESIS CLK 5V PWM 1V 5k 1:1 0.75V + - - + + - + - + - + - HICCUP MODE TIMER and LOGIC CS SS SLOPECOMP RAMP GENERATOR SLOPE DELAY TIMERS AND DRIVER LOGIC R R SS SS Buffer 0 éA SSOFF 100 éA 20 éA 20 éA 20 éA 30 éA 10 éA 5 éA 5V THERMAL LIMIT (160°C) S R Q T Q Q HO2 LO2 HO1 LO1 1.0V CLK + LEB LM5046 SNVS703H – FEBRUARY 2011 – REVISED NOVEMBER 2014 www.ti.com 7 Detailed Description 7.1 Overview The LM5046 PWM controller contains all of the features necessary to implement a Phase-Shifted Full-Bridge (PSFB) topology power converter using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated dc-dc converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2A high and low side gate drivers for the four external bridge MOSFETs plus control signals for secondary side synchronous rectifiers. External resistors program the dead-time to enable Zero-Volt Switching (ZVS) of the primary FETs. Please refer to the Application and Implementation section for details on the operation of the PSFB topology. Intelligent startup of synchronous rectifier allows turn-on of the power converter into the pre-bias loads. Cycle-by-cycle current limit protects the power components from load transients while hiccup mode protection limits average power dissipation during extended overload conditions. Additional features include programmable soft-start, soft-start of the synchronous rectifiers, and a 2 MHz capable oscillator with synchronization capability and thermal shutdown. 7.2 Functional Block Diagram 12 Submit Documentation Feedback Copyright © 2011–2014, Texas Instruments Incorporated Product Folder Links: LM5046 |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
