Linear Technology LT1508
the LT1508 achieves far lower line current distortion with a smaller magnetic element than systems that use either peak current detection, or zero current switching approach, in both continuous and discontinuous modes of operation. The LT1508 also provides filtering capability to reject line switching noise which can cause instability when fed into the multiplier. The LT1508 provides many protection features including peak current limiting and overvoltage protection.| Part No. | LT1508 |
|---|---|
| Datasheet | LT1508 Download |
| Manufacturer |  Linear Technology |
| Description | Power Factor and PWM Controller |
| Buy | Stock & Price |
FEATURES
I PFC and PWM Single Chip Solution I Synchronized Operation up to 300kHz I 99% Power Factor Over 20:1 Load Current Range I Voltage Mode PWM I Instantaneous Overvoltage Protection I Dedicated Overvoltage Protection (OVP Pin) I Minimal Line Current Dead Zone I Typical 250µA Start-Up Supply Current I Line Switching Noise Filter I Low Quiescent Current: 13mA I Fast 1.5A Peak Current Gate Drivers I Separate Soft Start Control UAPPLICATIONS
I Universal Power Factor Corrected Power Supplies and Preregulators LT1508 Power Factor and PWM Controller (Voltage Mode)DESCRIPTION
The LT ®1508 is a complete solution for universal off-line switching power supplies utilizing active power factor correction. The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally. The voltage mode PWM section (LT1509 is the current mode counterpart) contains all the primary side functions to convert the PFC preregulated high voltage output to an isolated low voltage output.
