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MFG:ST Package Cooled:DIP
Part Number: L4990A
MFG: ST
Package Cooled: DIP
Description: This primary controller I.C., developed in BCD60II technology, has been designed to implement off line...
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L4990A
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DataSheet
General Description
L4990A General Description
This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control.
Based on a standard current mode PWM controller this device includes some features as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns (typ) leading edge blanking on current sense, pulse by pulse current limit and overcurrent protection with soft start intervention.
L4990A Maximum Ratings
| Symbol | Parameter | Value | Unit |
| VCC | Supply Voltage (ICC < 50mA) (*) | selflimit | V |
| IOUT | Output Peak Pulse Current | 1.5 | A |
| Analog Inputs & Outputs (6,7) | -0.3 to 8 | V | |
| Analog Inputs & Outputs (1,2,3,4,5,15,14 13) | -0.3 to 6 | V | |
| Ptot | Power Dissipation @ Tamb = 70°C | 1 | W |
| Tj | Junction Temperature, Operating Range | -25 to 125 | °C |
| Tstg | Storage Temperature, Operating Range | -55 to 150 | °C |
L4990A Connection Diagram
L4990A
PDF/DataSheet Download
- Datasheet: L4990A
- File Size: 330013 KB
- Manufacturer: STMicro
- Click here to Download
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- ·L4916
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