DocumentationDatasheet
Reliability Data
LT Journal
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Features
- Adaptive DirectSense™ Zero Voltage Switching
- Integrated Synchronous Rectification Control for Highest Efficiency
- Output Power Levels from 50W to Kilowatts
- Very Low Start-Up and Quiescent Currents
- Compatible with Voltage Mode and Current Mode Topologies
- Programmable Slope Compensation
- Undervoltage Lockout Circuitry with 4.2V Hysteresis and Integrated 10.3V Shunt Regulator
- Fixed Frequency Operation to 1MHz
- 50mA Outputs for Bridge Drive and Secondary Side Synchronous Rectifiers
- Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection
- 5V, 15mA Low Dropout Regulator
- 20-Pin PDIP and SSOP Packages
Typical Application
Description
The LTC1922-1 phase shift PWM controller provides all of the control and protection functions necessary to implement a high performance, zero voltage switched, phase shift, full-bridge power converter with synchronous rectification. The part is ideal for developing isolated, low voltage, high current outputs from a high voltage input source. The LTC1922-1 combines the benefits of the full-bridge topology with fixed frequency, zero voltage switching operation (ZVS). Adaptive ZVS circuity controls the turn-on signals for each MOSFET independent of internal and external component tolerances for optimal performance.The LTC1922-1 also provides secondary side synchronous rectifier control. The device uses peak current mode control with programmable slope comp and leading edge blanking.
The LTC1922-1 features extremely low operating and start-up currents to simplify off-line start-up and bias circuitry. The LTC1922-1 also includes a full range of protection features and is available in 20-pin through hole (N) and surface mount (G) packages.
N-20,SSOP-20
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1922EG-1#PBF | SSOP | 20 | E | $6.51 | $5.50 |
| LTC1922EG-1#TRPBF | SSOP | 20 | E | $5.60 | |
| LTC1922EN-1#PBF | PDIP | 20 | E | $6.51 | $5.50 |
| LTC1922IG-1#PBF | SSOP | 20 | I | $7.04 | $5.95 |
| LTC1922IG-1#TRPBF | SSOP | 20 | I | $6.05 | |
| LTC1922IN-1#PBF | PDIP | 20 | I | $7.04 | $5.95 |
| LTC1922EG-1 | SSOP | 20 | E | $13.02 | $11.00 |
| LTC1922EG-1#TR | SSOP | 20 | E | $11.20 | |
| LTC1922EN-1 | PDIP | 20 | E | $13.02 | $11.00 |
| LTC1922IG-1 | SSOP | 20 | I | $14.08 | $11.90 |
| LTC1922IG-1#TR | SSOP | 20 | I | $12.10 | |
| LTC1922IN-1 | PDIP | 20 | I | $14.08 | $11.90 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.