 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LM5145 Datasheet(PDF) 28 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
LM5145 Datasheet(HTML) 28 Page - Texas Instruments |
|
|
28 / 73 page  7.3.15.1 Independent Dual-Output Operation The LM25137 has two outputs that can operate independently. Both VOUT1 and VOUT2 can be set to fixed output setpoints of 3.3V, 5V, or 12V using one resistor from VDDA to FB1 or FB2 as needed. Alternatively, set the output voltage setpoints between 0.8V and 36V using external feedback resistors based on Equation 4. See Table 7-3 and Figure 7-7. Table 7-3. Configuration Modes for Independent Dual Outputs RCNFG PRIMARY, SECONDARY DRSS INDEPENDENT OR INTERLEAVED OUTPUTS 10kΩ Primary OFF Independent 19.1kΩ Primary DRSS1 Independent 29.4kΩ Primary DRSS2 Independent RT RSS PFM/SYNC AGND COMP2 VOUT2 ISNS2+ LO2 SW2 HO2 CBOOT2 VIN COMP1 BIAS1/VOUT1 ISNS1+ LO1 SW1 HO1 CBOOT1 VCC FB1 VDDA FB2 SYNCOUT CFNG EN1 EN2 PG2 PG1 L O1 C OUT2 C IN1 C VDDA L O2 C OUT1 R S2 R S1 Q 2 Q 1 R SS R RT R CNFG Q 4 Q 3 C VCC C BOOT1 C BOOT2 LM25137 VDDA C IN2 R FB1 C HF2 R COMP2 C COMP2 C HF1 R COMP1 C COMP1 VDDA R FB2 V IN V OUT2 V OUT1 Figure 7-7. LM25137 Regulator Schematic Configured for Independent Dual Outputs 7.3.15.2 Single-Output Interleaved Operation Based on a resistor RCNFG connected from CNFG to AGND, configure the LM25137 as for single-output interleaved operation. As shown in Table 7-4, use 41.2kΩ to disable DRSS and 54.9kΩ or 71.5kΩ to enable DRSS at 5% or 10% frequency spreading, respectively. This setup disables the error amplifier of channel 2 and places the error amplifier in a high impedance state. The controller is then in a primary, secondary configuration, and the SYNCOUT clock is 180° lagging HO2 (or 180° leading HO1). As shown in Figure 7-8, connect COMP1 to COMP2 and use FB1 to set the output voltage setpoint. Use PG1 as needed and leave PG2 open or tied to GND. Table 7-4. Configuration Modes for Single-Output Interleaved Operation RCNFG PRIMARY / SECONDARY DRSS INDEPENDENT OR INTERLEAVED OUTPUTS 41.2kΩ Primary OFF Interleaved 54.9kΩ Primary DRSS1 Interleaved 71.5kΩ Primary DRSS2 Interleaved LM25137 SNVSCU4 – OCTOBER 2025 www.ti.com 28 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated Product Folder Links: LM25137 |
|
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
