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Texas Instruments UC1825B-SP | Demoboard UC1825BEVM-CVAL
Class-V, radiation hardened high-speed PWM controller
Details
| Topologie | Gegentaktflusswandler |
| Eingangsspannung | 22-48 V |
| Schaltfrequenz | 1000 kHz |
| Ausgang 1 | 5 V / 10 A |
Beschreibung
The UC1825B-SP PWM control device is optimized for high-frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty-cycle clamp. The logic is fully latched to provide jitter-free operation and prohibit multiple pulses at an output. An undervoltage lockout section with 800 mV of hysteresis assures low start up current. During undervoltage lockout, the outputs are high impedance.This device features totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET. The on-state is designed as a high level.
Eigenschaften
- QML-V qualified, SMD 5962-8768106
- 5962R8768106VYC:◦Radiation hardness assurance (RHA) up to 100-krad(Si) total ionizing dose (TID) (1)
- Compatible with voltage- or current-mode topologies
- Practical operation switching frequencies to 1 MHz
- 50-ns propagation delay-to-output
- High-current dual totem pole outputs (2-A peak)
- Wide bandwidth error amplifier
- Fully latched logic with double-pulse suppression
- Pulse-by-pulse current limiting
- Soft start/maximum duty-cycle control
- Undervoltage lockout with hysteresis
- Low start-up current (1.1 mA)
(1)Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/s. Radiation Lot Acceptance Testing is available - contact factory for details.
Typische Anwendungen
- Space launch vehicles
- Satellite buses and payloads
- Radiation-hardened DC-DC converters
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | Tol. C | VR(V (DC)) | Bauform | Betriebstemperatur | Q(%) | DF(%) | RISO | Keramiktyp | L(mm) | B(mm) | H(mm) | Fl(mm) | Verpackung | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Drahttype | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 50 V(DC), 100 pF, ±5% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 50 V(DC) | Kapazität100 pF | Kapazität±5% | Nennspannung50 V (DC) | Bauform0603 | Betriebstemperatur -55 °C up to +125 °C | Güte1000 % | – | Isolationswiderstand10 GΩ | KeramiktypNP0 Klasse I | Länge1.6 mm | Breite0.8 mm | Höhe0.8 mm | Pad Dimension0.4 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), 470 pF, ±10% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 50 V(DC) | Kapazität470 pF | Kapazität±10% | Nennspannung50 V (DC) | Bauform0603 | Betriebstemperatur -55 °C up to +125 °C | – | Verlustfaktor2.5 % | Isolationswiderstand10 GΩ | KeramiktypX7R Klasse II | Länge1.6 mm | Breite0.8 mm | Höhe0.8 mm | Pad Dimension0.4 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 16 V(DC), 220 nF, ±10% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 16 V(DC) | Kapazität220 nF | Kapazität±10% | Nennspannung16 V (DC) | Bauform0603 | Betriebstemperatur -55 °C up to +125 °C | – | Verlustfaktor5 % | Isolationswiderstand2.3 GΩ | KeramiktypX7R Klasse II | Länge1.6 mm | Breite0.8 mm | Höhe0.8 mm | Pad Dimension0.4 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | |||||
 | WE-HCF SMT-Hochstrominduktivität, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-HCF SMT-Hochstrominduktivität | – | – | – | Bauform2013 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | – | Länge20.8 mm | Breite20.5 mm | Höhe13.5 mm | – | – | Induktivität2.2 µH | Performance Nennstrom39.5 A | Sättigungsstrom 147 A | Sättigungsstrom @ 30%52 A | Gleichstromwiderstand1.65 mΩ | Eigenresonanzfrequenz32 MHz | DrahttypeFlach | ||||
 | 750311765 | Transformer, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | Produktserie Transformer | – | – | – | BauformToroid | Betriebstemperatur -40 °C up to +85 °C | – | – | – | – | Länge9.02 mm | Breite8.64 mm | Höhe7.62 mm | – | VerpackungTape and Reel | Induktivität1200 µH | – | – | – | – | – | – | ||
750318061 | Push-Pull Transformer, –, – | Simulation– | Downloads– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | Produktserie Push-Pull Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |