Electronic Components Datasheet Search |
|
171012401 Datasheet(PDF) 10 Page - Wurth Elektronik GmbH & Co. KG, Germany. |
|
171012401 Datasheet(HTML) 10 Page - Wurth Elektronik GmbH & Co. KG, Germany. |
10 / 31 page we-online.com Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.0 10/31 WPMDH1102401 / 171012401 MagI³C Power Module VDRM - Variable Step Down Regulator Module BLOCK DIAGRAM COUT LSS HSS RON VIN EN PGND SS FB VOUT 15µH CVCC CBOOST 0.47µF Power Module AGND Controller/ Power Control/ Protection Circuitry Linear Regulator RON 1 2 6 CSS 5 3 EP 4 7 CIN RFBT RFBB CFF VIN UVLO VIN VOUT AGND AGND CIRCUIT DESCRIPTION The MagI³C Power Module WPMDH1102401 is based on a synchronous step down regulator with integrated MOSFET and a power inductor. The control scheme uses a constant on-time (COT) low ripple hysteretic regulation loop. The VOUT of the regulator is divided with the feedback resistor network RFBT and RFBB and fed into the FB pin. The internal comparator compares this signal with the internal 0.8V reference. If the feedback voltage is below the reference, the High Side MOSFET is turned on for a fixed on-time. To achieve a regulated output voltage the off-time is modulated. At stable VIN to VOUT condition the relation between on-time and off-time is constant. The on-time is fixed and preset by the value of the RON resistor. The switching frequency is directly proportional to this value. The connection of the RON resistor to VIN results into an additional compensation of varying VIN values, (VIN feed- forward) so the switching frequency will remain almost constant even during VIN transients. A load current transient (low to high current) allows the off-time to immediately transition to the minimum of 260 ns. This results in a short term higher switching frequency which ensures an extremely quick regulation response. As soon as the output capacitor is recharged to the nominal output voltage the switching frequency will return to the original value even though the load current is higher. Constant on-time control scheme does not require compensation circuitry which makes the overall design very simple. Nevertheless it requires a certain minimum ripple at the feedback pin. The MagI³C Power Module WPMDH1102401 generates this ripple internally and is supported by the CFF capacitor which bypasses AC ripple directly to the feedback pin from the output. With this architecture very small output ripple values of 10ths of millivolts similar to current or voltage mode devices are achieved. |
Similar Part No. - 171012401 |
|
Similar Description - 171012401 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | 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 |