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Texas Instruments LM5122-Q1
LM5122/-Q1 Wide-Input Synchronous Boost Controller With Multiple Phase Capability
Details
| Topologie | Aufwärtswandler |
| Eingangsspannung | 9-20 V |
| Schaltfrequenz | 400-975 kHz |
| Ausgang 1 | 24 V / 4.5 A |
| Ausgang 2 | 28 V / 7 A |
| IC-Revision | G |
Beschreibung
The LM5122 is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The controlmethod is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.
The switching frequency is programmable up to 1MHz. Higher efficiency is achieved by two robust Nchannel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions.
An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180º phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.
Eigenschaften
- AEC-Q100 Grade 1 (TA = –40°C to 125°C)
- Maximum Input Voltage : 65 V
- Min Input Voltage : 3.0 V (4.5 V for startup)
- Output Voltage up to 100 V
- Bypass (VOUT = VIN) Operation
- 1.2 V Reference with ±1.0% Accuracy
- Free-Run/Synchronizable Switching to 1 MHz
- Peak Current Mode Control
- Robust 3 A Integrated Gate Drivers
- Adaptive Dead-Time Control
- Optional Diode Emulation Mode
- Programmable Cycle-by-Cycle Current Limit
- Hiccup Mode Overload Protection
- Programmable Line UVLO
- Programmable Soft-Start
- Thermal Shutdown Protection
- Low Shutdown Quiescent Current: 9 µA
- Programmable Slope Compensation
- Programmable Skip Cycle Mode Reduces Standby Power
- Allows External VCC Supply
- Inductor DCR Current Sensing Capability
- Multiphase Capability
- Thermally Enhanced 20-Pin HTSSOP
Remarks:1)fSW2 Switching frequency 2 is choosed due to max value
2)From Figure 38. Non-Isolated Synchronous Flyback Converter Simplified SchematicOnly I/O is given, but it's a coupled inductor(transformer)
Typische Anwendungen
- High Current Boost Power Supply
- 12 V, 24 V, and 48 V Power Systems
- Automotive Start-Stop
- Audio Power Supply
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | Tol. C | VR(V (DC)) | Bauform | Betriebstemperatur | DF(%) | RISO | Keramiktyp | L(mm) | B(mm) | H(mm) | Fl(mm) | Verpackung | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 10 V(DC), 4.7 µF, ±10% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 10 V(DC) | Kapazität4.7 µF | Kapazität±10% | Nennspannung10 V (DC) | Bauform0805 | Betriebstemperatur -55 °C up to +125 °C | Verlustfaktor10 % | Isolationswiderstand0.02 GΩ | KeramiktypX7R Klasse II | Länge2 mm | Breite1.25 mm | Höhe1.25 mm | Pad Dimension0.5 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | |||||
 | WE-HCI SMT-Hochstrominduktivität, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-HCI SMT-Hochstrominduktivität | – | – | – | Bauform1890 | Betriebstemperatur -40 °C up to +150 °C | – | – | – | Länge18.3 mm | Breite18.2 mm | Höhe8.9 mm | – | – | Induktivität10 µH | Performance Nennstrom16.5 A | Sättigungsstrom 110 A | Sättigungsstrom @ 30%21.5 A | Gleichstromwiderstand6.9 mΩ | Eigenresonanzfrequenz14 MHz | MaterialWE-PERM 2 |