Imagens apenas para referência
KA3525A
+Lista de MateriaisIC REG CTRLR 16DIP
-
Fabricanteonsemi
-
Peça do Fabricante #KA3525A
-
Em Estoque5920
365 Garantia de Qualidade em 1 dia
7*24 Garantia de serviço em 24 horas
90-Garantia de pós-venda em 1 dia
Garantia de Produto Genuíno
Especificações
| Atributo | Valor |
| Part Status | Obsolete |
| Base Product Number | KA3525 |
| Output Type | Transistor Driver |
| Output Configuration | Positive |
| Number of Outputs | 2 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 7V ~ 20V |
| Frequency - Switching | 60Hz ~ 430kHz |
| Duty Cycle (Max) | 49% |
| Synchronous Rectifier | Yes |
| Clock Sync | Yes |
| Control Features | Enable, Soft Start |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole |
| Package | 16-DIP (0.300", 7.62mm) |
| Supplier Device Package | 16-PDIP |
| Packaging | Tube |
Visão Geral
Description
Key features of the KA3525A include adjustable output frequency, a wide supply voltage range, and high current totem pole outputs, which provide the capability to drive N-channel MOSFETs or bipolar transistors directly. The circuit also includes built-in protections like under-voltage lockout, soft-start capability, and overload protection to ensure reliable and safe operation in various applications.
Its versatility makes the KA3525A suitable for use in DC-DC converters, inverters, and switch-mode power supplies. The device's robust design and functionality make it a popular choice for engineers seeking efficient power control solutions.
Equivalent
Features
1. PWM Control: Offers precise control of pulse width modulation, crucial for regulating power supply in various electronic devices.
2. Wide Input Voltage Range: Accommodates a broad range of input voltages, enhancing its applicability in different power supply designs.
3. High Output Current Capacity: Capable of delivering significant output current, making it suitable for driving power MOSFETs and bipolar transistors.
4. Built-in Error Amplifier: Includes an onboard error amplifier that facilitates accurate voltage regulation and feedback control.
5. Oscillator: Features an internal oscillator with adjustable frequency, allowing customization to specific application needs.
6. Soft Start Capability: Incorporates a soft start feature to prevent inrush current during power-up, enhancing device longevity.
7. Dead-Time Control: Includes adjustable dead-time control, optimizing the switching performance and improving efficiency.
8. Overcurrent Protection: Provides built-in protection against overcurrent conditions, safeguarding both the controller and the connected components.
9. Shutdown Function: Offers a shutdown capability for energy-saving and protective measures during fault conditions.
These features make the KA3525A ideal for power supply designs in consumer electronics, industrial applications, and more.
Pinout
1. Compensation (1): Connects to the output of the error amplifier for frequency compensation.
2. V_FF (2): Sets the shutdown threshold voltage with a resistor divider.
3. Soft Start (3): Controls the soft-start interval via an external capacitor.
4. Oscillator Output (4): Outputs the oscillator signal.
5. RT (5): Sets the oscillator frequency with an external resistor.
6. CT (6): Sets the oscillator frequency with an external capacitor.
7. Shutdown (7): Disables the output when activated.
8. Ground (8): Connects to the ground.
9. Emitter Output (9): Provides emitter output for driver transistors.
10. Collector Output (10): Provides collector output for driver transistors.
11. V_CC (11): Connects to the input supply voltage.
12. Output A (12): PWM output for driving the main power switch.
13. Output B (13): PWM output for driving the secondary power switch.
14. Reference Output (14): Provides a stable 5V reference voltage.
15. Non-inverting Input (15): Non-inverting input of the error amplifier.
16. Inverting Input (16): Inverting input of the error amplifier.
These pins support various functions like setting oscillator frequency, controlling soft start, and providing outputs for PWM switching.
Manufacturer
Application
1. Switching Power Supplies: Used for regulating output voltage in AC/DC and DC/DC converters.
2. Motor Control: Employed in controlling speed and torque in DC motor drives.
3. Inverters: Utilized in applications requiring conversion of DC to AC power, such as in solar inverters.
4. Battery Chargers: Helps in managing charging protocols for various battery chemistries.
5. Lighting Control: Applied in dimmers and other lighting control systems to regulate brightness effectively.
Its ability to provide precise control makes it suitable for these applications.
Package
Frequently Asked Questions
Q: What is the maximum supply voltage for the KA3525A?
A: The device operates with a supply voltage (Vcc) ranging from 7V to 20V.
Q: Does the KA3525A support synchronous rectification?
A: Yes, it includes a built-in synchronous rectifier feature for improved efficiency.
Q: What is the maximum duty cycle of this PWM controller?
A: The maximum duty cycle is 49%, typical for push-pull or half-bridge topologies.
Q: Can the switching frequency be adjusted externally?
A: Yes, the switching frequency is adjustable from 60Hz to 430kHz via external timing components.
Q: What control features are included in the KA3525A?
A: It includes enable and soft-start functions for controlled power-up sequences.
Q: Is the KA3525A suitable for through-hole PCB assembly?
A: Yes, it comes in a 16-pin DIP package (16-PDIP) for through-hole mounting.