LT3748 Series

100V Isolated Flyback Controller

Catalog

100V Isolated Flyback Controller

Part	Output Type	Output Configuration	Control Features	Mounting Type	Supplier Device Package	Number of Outputs	Package / Case	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Function	Topology	Output Phases	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]
Analog Devices LT3748MPMS#TRPBF	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-55 °C	150 °C	Step-Up/Step-Down	Flyback	1	100 V	5 V
Analog Devices LT3748HMS#TRPBF	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-40 °C	150 °C	Step-Up/Step-Down	Flyback	1	100 V	5 V
Analog Devices LT3748MPMS	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-55 °C	150 °C	Step-Up/Step-Down	Flyback	1	100 V	5 V
Analog Devices LT3748EMS#PBF	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-40 °C	125 ¯C	Step-Up/Step-Down	Flyback	1	100 V	5 V
Analog Devices LT3748MPMS#TR	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-55 °C	150 °C	Step-Up/Step-Down	Flyback	1	100 V	5 V
Analog Devices LT3748EMS#TRPBF	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-40 °C	125 ¯C	Step-Up/Step-Down	Flyback	1	100 V	5 V
Analog Devices LT3748HMS#PBF	Transistor Driver	Isolation Capable Positive	Enable Soft Start	Surface Mount	16-MSOP	1	0.118 in 3 Lead 12	16-TFSOP	-40 °C	150 °C	Step-Up/Step-Down	Flyback	1	100 V	5 V

Catalog

100V Isolated Flyback Controller

Key Features

• 5V to 100V Input Voltage Range

• 1.9A Average Gate Drive Source and Sink Current

• Boundary Mode Operation

• No Transformer Third Winding or Opto-Isolator Required for Regulation

• Primary-Side Winding Feedback Load Regulation

• VOUTSet with Two External Resistors

• INTVCCPin for Control of Gate Driver Voltage

• Programmable Soft Start

• Programmable Undervoltage Lockout

• Available in MSOP Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LT3748 is a switching regulator controller specifically designed for the isolated flyback topology and capable of high power. It drives a low side external N-channel power MOSFET from an internally regulated 7V supply. No third winding or opto-isolator is required for regulation as the part senses the isolated output voltage directly from the primary-side flyback waveform.The LT3748 utilizes boundary mode to provide a small magnetic solution without compromising load regulation. Operating frequency is set by load current and transformer magnetizing inductance. The gate drive of the LT3748 combined with a suitable external MOSFET allow it to deliver load power up to several tens of watts from input voltages as high as 100V.The LT3748 is available in a high voltage 16-lead MSOP package with four leads removed.ApplicationsIsolated Telecom ConvertersHigh Power Automotive SuppliesIsolated Industrial Power SuppliesMilitary and High Temperature Applications