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KA7500B / KA7500 DIP-16 PWM Controller IC — TL494 Equivalent (5pcs)
KA7500B / KA7500 DIP-16 PWM Controller IC TL494 Equivalent (5pcs)
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KA7500B / KA7500 — DIP-16 PWM Controller IC (TL494 Equivalent)
The KA7500B is Samsung's pin-compatible equivalent of the TL494 PWM controller IC in DIP-16 package. Electrically identical to TL494CN, it features dual error amplifiers, programmable dead-time, and complementary push-pull outputs capable of 200mA. Widely used in ATX power supplies, inverters, and DC-DC converters. This listing provides 5 pieces — new and original.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | KA7500B / KA7500 |
| Package | DIP-16 |
| TL494 Compatible | ✅ Yes (pin-for-pin) |
| Supply Voltage (Vcc) | 7V – 40V |
| Output Current (per driver) | 200mA sink/source |
| Oscillator Frequency | 1Hz – 300kHz |
| Error Amplifiers | 2 (differential, 70dB gain) |
| Dead-Time Control | 0–45% programmable |
| Output Modes | Single-ended or push-pull |
| Internal Reference | 5V ±1% |
| Operating Temperature | 0°C to +70°C |
| Quantity | 5 PCS |
KA7500B vs TL494 Equivalents
| Part Number | Manufacturer | Package | Notes |
|---|---|---|---|
| KA7500B | Samsung (Fairchild) | DIP-16 | Pin-compatible TL494 |
| TL494CN | Texas Instruments | DIP-16 | Original |
| DBL494 | Daewoo | DIP-16 | Pin-compatible |
| IR3M02 | International Rectifier | DIP-16 | Pin-compatible |
Why Choose KA7500B?
- ✅ TL494 pin-compatible — direct drop-in replacement in any TL494 circuit
- ✅ Dual error amplifiers — independent voltage and current feedback loops
- ✅ Push-pull outputs — drives transformer primary in push-pull/half-bridge topologies
- ✅ Programmable dead-time — prevents shoot-through in complementary switch pairs
- ✅ New & original Samsung/Fairchild parts — reliable quality for repair and design
Compatible With / Works With
- ATX desktop PC power supply primary PWM stage (direct TL494 replacement)
- Push-pull 12V–220V inverter transformer driver
- DC-DC boost/buck converter control stage
- Motor PWM speed controller
- Gate drivers: IR2110, TC4420 (for large MOSFET gate capacitance)
Typical Applications
- ATX PSU Repair — replace failed TL494/KA7500 in desktop PC power supply
- 12V–220V Inverter — push-pull driver for EI33/EE42 transformer
- DC-DC Converter — boost/buck-boost topology control up to 300kHz
- UPS Inverter Stage — sine-wave or square-wave output control
- Motor Speed Controller — variable frequency PWM for DC motors
FAQ
Q: Is KA7500B a direct replacement for TL494CN?
A: Yes. KA7500B is pin-for-pin compatible with TL494CN. Same DIP-16 package, identical pinout, and equivalent electrical specifications. Simply swap the IC without any circuit modification.
Q: How do I set the switching frequency on KA7500B?
A: Same as TL494: connect RT between pin 6 and Vref (pin 14), CT between pin 5 and GND. Frequency ≈ 1.1 / (RT × CT). For 50kHz: RT=22kΩ, CT=1nF.
Q: What is the difference between KA7500 and KA7500B?
A: KA7500B is the improved version with tighter reference voltage tolerance (±1% vs ±2%) and better temperature stability. KA7500B is preferred for new designs and repair.
Package Contents
- 5× KA7500B / KA7500 DIP-16 PWM Controller IC
- ★Product Description
- ★About us
- ★Custom cable
KA7500B / KA7500 — DIP-16 PWM Controller IC (TL494 Equivalent)
The KA7500B is Samsung's pin-compatible equivalent of the TL494 PWM controller IC in DIP-16 package. Electrically identical to TL494CN, it features dual error amplifiers, programmable dead-time, and complementary push-pull outputs capable of 200mA. Widely used in ATX power supplies, inverters, and DC-DC converters. This listing provides 5 pieces — new and original.
Key Specifications
| Parameter | Value |
|---|---|
| Part Numbers | KA7500B / KA7500 |
| Package | DIP-16 |
| TL494 Compatible | ✅ Yes (pin-for-pin) |
| Supply Voltage (Vcc) | 7V – 40V |
| Output Current (per driver) | 200mA sink/source |
| Oscillator Frequency | 1Hz – 300kHz |
| Error Amplifiers | 2 (differential, 70dB gain) |
| Dead-Time Control | 0–45% programmable |
| Output Modes | Single-ended or push-pull |
| Internal Reference | 5V ±1% |
| Operating Temperature | 0°C to +70°C |
| Quantity | 5 PCS |
KA7500B vs TL494 Equivalents
| Part Number | Manufacturer | Package | Notes |
|---|---|---|---|
| KA7500B | Samsung (Fairchild) | DIP-16 | Pin-compatible TL494 |
| TL494CN | Texas Instruments | DIP-16 | Original |
| DBL494 | Daewoo | DIP-16 | Pin-compatible |
| IR3M02 | International Rectifier | DIP-16 | Pin-compatible |
Why Choose KA7500B?
- ✅ TL494 pin-compatible — direct drop-in replacement in any TL494 circuit
- ✅ Dual error amplifiers — independent voltage and current feedback loops
- ✅ Push-pull outputs — drives transformer primary in push-pull/half-bridge topologies
- ✅ Programmable dead-time — prevents shoot-through in complementary switch pairs
- ✅ New & original Samsung/Fairchild parts — reliable quality for repair and design
Compatible With / Works With
- ATX desktop PC power supply primary PWM stage (direct TL494 replacement)
- Push-pull 12V–220V inverter transformer driver
- DC-DC boost/buck converter control stage
- Motor PWM speed controller
- Gate drivers: IR2110, TC4420 (for large MOSFET gate capacitance)
Typical Applications
- ATX PSU Repair — replace failed TL494/KA7500 in desktop PC power supply
- 12V–220V Inverter — push-pull driver for EI33/EE42 transformer
- DC-DC Converter — boost/buck-boost topology control up to 300kHz
- UPS Inverter Stage — sine-wave or square-wave output control
- Motor Speed Controller — variable frequency PWM for DC motors
FAQ
Q: Is KA7500B a direct replacement for TL494CN?
A: Yes. KA7500B is pin-for-pin compatible with TL494CN. Same DIP-16 package, identical pinout, and equivalent electrical specifications. Simply swap the IC without any circuit modification.
Q: How do I set the switching frequency on KA7500B?
A: Same as TL494: connect RT between pin 6 and Vref (pin 14), CT between pin 5 and GND. Frequency ≈ 1.1 / (RT × CT). For 50kHz: RT=22kΩ, CT=1nF.
Q: What is the difference between KA7500 and KA7500B?
A: KA7500B is the improved version with tighter reference voltage tolerance (±1% vs ±2%) and better temperature stability. KA7500B is preferred for new designs and repair.
Package Contents
- 5× KA7500B / KA7500 DIP-16 PWM Controller IC
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