UC1524AJ - 40V PWM Controller, 300kHz, 16-CDIP | Texas Instruments
Référence : UC1524AJ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.8 | $168,00 |
| 100 | $14.95 | $1 495,00 |
| 500 | $13.2 | $6 600,00 |
| 1 000 | $11.5 | $11 500,00 |
UC1524AJ Présentation
What is a PWM controller? A PWM (Pulse-Width Modulation) controller is a type of switching regulator control IC that generates a variable-duty-cycle square-wave drive signal to switch a power MOSFET or bipolar transistor. PWM controllers sit hierarchically inside the broader family of voltage-mode and current-mode switching controllers, which themselves fall under the SMPS (Switched-Mode Power Supply) control category of power management ICs. PWM controllers are the heart of virtually every modern DC-DC converter, AC-DC switcher, and power inverter above a few watts.
Key features of the UC1524AJ include a precision internal reference, a fully compensated on-chip error amplifier, an onboard oscillator with dead-time control, and built-in soft-start circuitry. Double-ended 200 mA totem-pole outputs can directly drive the gates of power MOSFETs or the bases of bipolar pass transistors in half-bridge, full-bridge, or push-pull topologies. Internal logic prevents simultaneous conduction of the upper and lower output transistors, eliminating shoot-through losses. The wide 8 V to 40 V supply range and -55C to +125C operating range make the part suitable for avionics, military, and ruggedized industrial environments.
Typical applications include offline switch-mode power supplies (SMPS), DC-DC push-pull converters, half-bridge motor drivers, uninterruptible power supplies (UPS), and battery chargers. The 300 kHz maximum switching frequency allows smaller magnetics, reducing converter size and weight. Industrial 24 V bus systems and telecom -48 V distribution platforms commonly use this controller family for high-efficiency buck, boost, and flyback topologies.
When designing with this device, allocate adequate PCB ground plane area and keep the oscillator timing capacitor and resistor close to pins 6 and 7. Output current ratings assume the ceramic CDIP package is soldered into a socket or PCB with sufficient copper to dissipate switching losses. Always observe the 40 V absolute maximum supply rating and include input bulk capacitance to absorb inrush.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers with a unique reference for legacy UC1524A-family designs.
Alternatives de remplacement direct pour UC1524AJ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
UC2524AJ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UC2524AN
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UC1524J
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SG1524J
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LT1524J
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UC1524AJ Valeurs maximales et caractéristiques électriques
| Topologie | Voltage-Mode PWM Controller |
| Supply Voltage (Vcc) | 8 V to 40 V |
| Courant de sortie maximal | 200 mA (peak per output) |
| Maximum Switching Frequency | 300 kHz |
| Maximum Duty Cycle | 45% (each output, double-ended) |
| Configuration de sortie | Double-ended (push-pull / totem-pole) |
| Plage de température de fonctionnement | -55C to +125C (military grade) |
| Error Amplifier | On-chip, internally compensated |
| Oscillator | On-chip, external Rt/Ct |
| Démarrage progressif | Built-in |
| Dead-Time Control | Yes (built-in anti-shoot-through) |
| Boîtier | 16-pin CDIP (J suffix) |
| Type de montage | Through-Hole (DIP) |
| Process Technology | Bipolar |
| Temperature Grade | MILITARY |
| Number of Terminals | 16 |
Configuration des broches de UC1524AJ
| Broche 1 | VREF — Internal 5V reference output |
| Broche 2 | IN+ — Error amplifier non-inverting input |
| Broche 3 | IN- — Error amplifier inverting input |
| Broche 4 | CL+ — Current-limit comparator non-inverting input |
| Broche 5 | CL- — Current-limit comparator inverting input |
| Broche 6 | Rt — Oscillator timing resistor connection |
| Broche 7 | Ct — Oscillator timing capacitor connection |
| Broche 8 | GND — Ground |
| Broche 9 | NC — Not connected (per datasheet) |
| Broche 10 | NC — Not connected (per datasheet) |
| Broche 11 | NC — Not connected (per datasheet) |
| Broche 12 | SYNC — Oscillator synchronization input |
| Broche 13 | SD — Shutdown logic input (active high) |
| Broche 14 | Vcc — Positive supply voltage (8V to 40V) |
| Broche 15 | OUT A — PWM output A (totem-pole, 200 mA) |
| Broche 16 | OUT B — PWM output B (totem-pole, 200 mA, complementary) |
Applications typiques
UC1524AJ convient pour 7 applications: Offline Switch-Mode Power Supply (SMPS), Push-Pull DC-DC Converter, Half-Bridge Motor Driver, Uninterruptible Power Supply (UPS), Battery Charger Controller, Telecom -48 V Distribution Converter, Industrial 24 V Bus DC-DC Module.
Offline Switch-Mode Power Supply (SMPS)
The UC1524AJ is ideally suited for offline switch-mode power supplies where a rectified 28 V or 36 V DC bus must be converted to isolated 5 V, 12 V, or 24 V rails. The 40 V maximum Vcc rating directly accommodates rectified 24 VAC inputs, while the 200 mA double-ended totem-pole outputs drive a small power MOSFET or bipolar pass transistor in a push-pull primary. Engineers place the controller between the input bulk capacitor and the high-frequency transformer primary, with the internal error amplifier closing the loop against a TL431 secondary-side reference. The 300 kHz maximum switching frequency enables smaller transformer cores, reducing converter weight for avionics and military SMPS designs where every gram matters.
Recommandé
Push-Pull DC-DC Converter
The push-pull topology uses the UC1524AJ's two complementary 45 percent duty-cycle outputs to alternately drive two transistors that switch a center-tapped transformer primary. This topology delivers high power density at moderate voltages and is the classic architecture for 28 V to 5 V converters used in military and avionics power distribution. The UC1524AJ's built-in anti-shoot-through dead-time control prevents simultaneous conduction of the upper and lower output transistors, eliminating cross-conduction losses that would otherwise demand external delay circuitry. The internal 5 V reference and compensated error amplifier close the regulation loop without external op-amps, reducing BOM count for high-reliability power modules.
Recommandé
Half-Bridge Motor Driver
The UC1524AJ's double-ended outputs can be configured to drive a half-bridge power stage for brushed and small brushless DC motors in industrial and military applications. The 200 mA peak output current directly switches the gates of medium-power MOSFETs in the half-bridge, while the 45 percent maximum duty cycle prevents transformer saturation in motor drive applications. The on-chip oscillator sets a fixed PWM frequency, allowing the controller to vary motor speed by adjusting the error amplifier reference. The -55C to +125C operating range supports outdoor and aerospace motor control installations.
Recommandé
Uninterruptible Power Supply (UPS)
The UC1524AJ is well-suited for the DC-DC converter stage inside a UPS system that bridges battery power to AC output during mains failure. The wide 8 V to 40 V supply input directly accepts 12 V, 24 V, and 36 V battery stacks, while the 200 mA output current drives the gate of a power MOSFET that switches the battery energy into the inverter transformer. The built-in soft-start feature limits inrush current when the UPS transfers from mains to battery operation, protecting the converter stage from transient stress. Military-grade temperature rating makes it ideal for ruggedized UPS installations in defense and aerospace platforms.
Recommandé
Battery Charger Controller
The UC1524AJ can implement a constant-voltage / constant-current battery charger by using its error amplifier to regulate the output of a buck-derived charger topology. The 40 V supply rating supports 24 V and 36 V battery stacks commonly used in industrial and military equipment, while the 300 kHz switching capability allows small magnetics for portable charger form factors. Internal current-limit and soft-start features protect the battery from inrush damage. The military temperature grade of the UC1524AJ enables charger designs for harsh-environment applications such as field-deployable radio equipment and aerospace battery systems.
Recommandé
Telecom -48 V Distribution Converter
In telecom central-office and outdoor cabinet power systems, the UC1524AJ generates isolated 5 V or 12 V rails from a -48 V DC distribution bus. Although the controller itself runs on a positive 8 V to 40 V auxiliary supply derived from the -48 V bus, its 200 mA output drive and 300 kHz capability support compact isolated DC-DC modules for line cards and base-station equipment. The double-ended topology provides galvanic isolation via a small high-frequency transformer, meeting telecom safety requirements. The military temperature rating and ceramic CDIP package support outdoor and environmentally-exposed telecom installations.
Recommandé
Industrial 24 V Bus DC-DC Module
The UC1524AJ's 8 V to 40 V supply range directly accepts 24 V industrial bus inputs, making it an ideal controller for DIN-rail mounted isolated DC-DC modules used in factory automation. The push-pull topology with 200 mA gate drive current supports power levels from 10 W to 100 W for sensor excitation, PLC I/O, and HMI panel supplies. Internal dead-time control and anti-shoot-through logic protect the half-bridge stage without external delay components, simplifying the bill of materials. Engineers combine the UC1524AJ with a TL431 secondary reference and an optocoupler for fully-isolated industrial power modules meeting IEC 61131-2 surge requirements.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour UC1524AJ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | UC2524AJ | UC2524AN | UC1524J | SG1524J | LT1524J |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology | Analog Devices |
| Package | CDIP-16 (J) | CDIP-16 - same | CDIP-16 (plastic N) - same footprint | CDIP-16 - same | CDIP-16 - same | CDIP-16 - same |
| Temperature Range | -55C to +125C (Military) | -40C to +125C (Industrial) | -40C to +125C (Industrial) | -55C to +125C (Military) | -55C to +125C (Military) | -55C to +125C (Military) |
| Max Supply Voltage | 40 V | 40 V | 40 V | 40 V | 40 V | 40 V |
| Topology | Voltage-Mode PWM, Double-Ended | Voltage-Mode PWM, Double-Ended | Voltage-Mode PWM, Double-Ended | Voltage-Mode PWM, Double-Ended | Voltage-Mode PWM, Double-Ended | Voltage-Mode PWM, Double-Ended |
| Advanced (A-suffix) Generation | Yes (UC1524A family) | Yes (UC1524A family) | Yes (UC1524A family) | No (original non-A) | No (original non-A) | No (original non-A) |
Principaux différenciateurs
- Military -55C to +125C operating range with hermetic ceramic CDIP (vs UC2524AJ)
- Advanced A-generation improved reference and drive (vs SG1524J)
- Pin-compatible upgrade from original UC1524/SG1524 generation (vs UC1524J)
Notes de conception
Place the oscillator timing resistor Rt and capacitor Ct as close as possible to pins 6 and 7 of the UC1524AJ, and keep the trace from pin 7 (Ct) to ground short and direct. Use a low-ESR ceramic or film capacitor for Ct to minimize frequency jitter. Keep the Vcc decoupling capacitor within 5 mm of pin 14, and provide at least 10 uF of bulk capacitance plus a 100 nF ceramic bypass. Route the OUT A (pin 15) and OUT B (pin 16) traces away from sensitive analog feedback nodes and as short as practical to the gate-drive resistors of the power MOSFETs. The 16-pin ceramic CDIP package dissipates through the socket pins, so use a machined-pin socket with gold contacts for reliable military-temperature operation.
Estimated: at Vcc = 28 V, Icc quiescent = 10 mA, and switching frequency = 100 kHz, the UC1524AJ itself dissipates approximately 0.28 W from Vcc plus the gate-charge losses of the driven MOSFETs. For a push-pull stage driving 2x IRF540 MOSFETs at 100 kHz, add roughly 0.1 W per MOSFET, totaling ~0.5 W controller dissipation. The ceramic CDIP-16 package has a thermal resistance of approximately 80 C/W, so junction temperature rise is ~40C above ambient, well within the 150C maximum for military -55C to +125C operation. Always include an input bulk capacitor of at least 100 uF/V at the Vcc pin to absorb switching inrush.
Do not exceed the 40 V absolute maximum Vcc rating on pin 14 - even brief transients from a 28 V avionics bus during load-dump can destroy the controller. Add a 36 V TVS diode (such as SMBJ36A) from Vcc to ground for automotive and avionics applications. Do not leave the shutdown pin (pin 13) floating - tie it to ground through a 10 kohm resistor, or to a logic signal if sequenced startup is required. The error amplifier inverting input (pin 3) must see a compensation network (typically 10 kohm in series with 0.01 uF to ground) to prevent oscillation. Never operate OUT A and OUT B with their outputs shorted together - the controller's anti-shoot-through logic prevents shoot-through, but external shorts will exceed the 200 mA output rating.
Use a single-point ground star topology with the UC1524AJ's pin 8 (GND) at the star center. Separate power-ground (return of the MOSFET source) from signal-ground (return of timing Ct and feedback network) to prevent switching noise from corrupting the oscillator. Keep the loop area of the power stage as small as practical by routing Vcc, OUT A/B, and the transformer primary in adjacent layers. For EMI-sensitive designs, place a small RC snubber (10 ohm + 470 pF) across each power MOSFET drain-source to control ringing. The CDIP-16 package's through-hole leads provide natural impedance control for the output drive traces.
Informations de conformité
Ceramic CDIP-16 military-grade package historically contains lead-bearing solder for hermetic sealing; RoHS status depends on specific finish option. AEC-Q100 not applicable - part is military-grade, not automotive-qualified. Compliance details should be confirmed with TI ordering information for the specific finish code.
