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Part Number: AX3842S
Description: The AX3842 Series is high performance fixed frequency current mode controllers.That is specifically designed for Off Li...
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AX3842S
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General Description
AX3842S General Description
The AX3842 Series is high performance fixed frequency current mode controllers.That is specifically designed for Off Line and DC To DC converter applications offering the designer a costeffective solution with minimal external components.These integrated circuits feature a trimmed oscillator for precise duty cycle control.A temperature compensated reference, high gain error amplifier, current sensing compara-tor, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.
AX3842S Maximum Ratings
| Symbol | Parameter | Value | Unit |
| Vi | Supply Voltage (low impedance source) | 30 | V |
| Vi | Supply Voltage (Ii<30mA) | Self Limiting | |
| IO | Output Current | ±1 | A |
| EO | Output Energy (capacitive load) | 5 | uJ |
| Analog Inputs (pin 2, 3) | -0.3 to 5.5 | V | |
| Error Amplifier Output Sink Current | 10 | mA | |
| Ptot | Power Dissipation at Tamb25oC | 800 | mW |
| Tstg | Storage Temperature Range | -65 to 150 | |
| TJ | Junction Operating Temperature | -40 to 150 | |
| TL | Lead Temperature (soldering 10s) | 300 |
AX3842S Features
• Trimmed Oscillator for Precise Frequency Control
• Oscillator Frequency Guaranteed at 250 kHz
• Current Mode Operation to 500 kHz
• Automatic Feed Forward Compensation
• Latching PWM for Cycle-By-Cycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current
• Oscillator Frequency Guaranteed at 250 kHz
• Current Mode Operation to 500 kHz
• Automatic Feed Forward Compensation
• Latching PWM for Cycle-By-Cycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current
AX3842S
PDF/DataSheet Download
- Datasheet: AX3842S
- File Size: 272318 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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