The LT ®1950 is a wide input range, single switch PWM controller that drives an N-channel power MOSFET with few external components required.
The LT1950 is a constant‑frequency, current‑mode controller for forward, boost, flyback and SEPIC DC/DC converter applications. It features a wide input voltage range, programmable operating frequency, and an auxiliary boost converter that supplies a 10 V gate‑drive from input voltages as low as 3 V.
The document includes detailed electrical characteristics, absolute maximum ratings, pin descriptions, package dimensions, and typical performance graphs, enabling designers to integrate the device into telecom, automotive, and portable electronic power supplies.
| Input voltage range | 3 V to 25 V |
|---|---|
| Output power levels | 25 W to 500 W |
| Operating frequency range | 100 kHz to 500 kHz |
| Current sense delay | 60 ns |
| Package type | 16‑Lead Plastic SSOP (Narrow) |
The LT1950 operates with an input voltage from 3 V up to 25 V.
The frequency is programmed with an external resistor and can be set between 100 kHz and 500 kHz.
It is supplied in a 16‑lead narrow SSOP package.