LTC1922-1 Series

Synchronous Phase Modulated Full-Bridge Controller

Catalog

Synchronous Phase Modulated Full-Bridge Controller

Part	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Topology	Frequency - Switching [Max]	Output Configuration	Output Type	Supplier Device Package	Function	Control Features	Duty Cycle (Max) [Max]	Mounting Type	Output Phases	Package / Case
Analog Devices LTC1922IG-1#TRPBF	85 °C	-40 °C	1	3.8 V	10.3 V	Full-Bridge	1 MHz	Isolation Capable Positive	Transistor Driver	20-SSOP	Step-Up/Step-Down	Ramp Soft Start	99 %	Surface Mount	1	20-SSOP
Analog Devices LTC1922EG-1#TRPBF	85 °C	-40 °C	1	3.8 V	10.3 V	Full-Bridge	1 MHz	Isolation Capable Positive	Transistor Driver	20-SSOP	Step-Up/Step-Down	Ramp Soft Start	99 %	Surface Mount	1	20-SSOP
Analog Devices LTC1922EG-1#PBF	85 °C	-40 °C	1	3.8 V	10.3 V	Full-Bridge	1 MHz	Isolation Capable Positive	Transistor Driver	20-SSOP	Step-Up/Step-Down	Ramp Soft Start	99 %	Surface Mount	1	20-SSOP

Catalog

Synchronous Phase Modulated Full-Bridge Controller

Key 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

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.ApplicationsTelecommunications, Infrastructure Power SystemsDistributed Power ArchitecturesServer Power SuppliesHigh Density Power Modules