LT3752LT3752-1 Series

Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller

Catalog

Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller

Part	Function	Output Type	Frequency - Switching [Max]	Frequency - Switching [Min]	Topology	Supplier Device Package	Number of Outputs	Package / Case [custom]	Package / Case	Package / Case	Package / Case [custom]	Control Features	Duty Cycle (Max)	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Mounting Type	Output Phases	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Grade	Qualification
Analog Devices LT3752IFE#PBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1	-40 °C	125 ¯C	Isolation Capable Positive
Analog Devices LT3752HFE-1#WPBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1	-40 °C	150 °C	Isolation Capable Positive	Automotive	AEC-Q100
Analog Devices LT3752HFE#PBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1	-40 °C	150 °C	Isolation Capable Positive
Analog Devices LT3752EFE#PBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1	-40 °C	125 ¯C	Isolation Capable Positive
Analog Devices LT3752HFE-1#WTRPBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1	-40 °C	150 °C	Isolation Capable Positive	Automotive	AEC-Q100
Analog Devices LT3752HFE	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1			Isolation Capable Positive
Analog Devices LT3752IFE-1	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	16 V	10.5 V	Surface Mount	1	-40 °C	125 °C	Isolation Capable Positive
Analog Devices LT3752HFE#WTRPBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	100 V	6.5 V	Surface Mount	1	-40 °C	150 °C	Isolation Capable Positive	Automotive	AEC-Q100
Analog Devices LT3752MPFE-1#PBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	16 V	10.5 V	Surface Mount	1	-55 °C	150 °C	Isolation Capable Positive
Analog Devices LT3752IFE-1#PBF	Step-Up/Step-Down	Transistor Driver	500 kHz	100 kHz	Forward Converter	38-TSSOP-EP	1	0.173 "	38-TFSOP Exposed Pad	31 Leads	4.4 mm	Enable Frequency Control Soft Start	95 %	16 V	10.5 V	Surface Mount	1	-40 °C	125 ¯C	Isolation Capable Positive

Catalog

Active Clamp Synchronous Forward Controllers with Internal Housekeeping Controller

Key Features

• Input Voltage Range: LT3752: 6.5V to 100V, LT3752-1:Limited Only by External Components

• Internal Housekeeping DC/DC Controller

• Programmable Volt-Second Clamp

• High Efficiency Control: Active Clamp, Synchronous Rectification, Programmable Delays

• Short-Circuit (Hiccup Mode) Overcurrent Protection

• Programmable Soft-Start/Stop

• Programmable OVLO and UVLO with Hysteresis

• Programmable Frequency (100kHz to 500kHz)

• Synchronizable to an External Clock

• AEC-Q100 Qualified for Automotive Applications

Description

The LT3752/LT3752-1 are current mode PWM controllers optimized for an active clamp forward converter topology. A DC/DC housekeeping controller is included for improved efficiency and performance. The LT3752 allows operation up to 100V input and the LT3752-1 is optimized for applications with input voltages greater than 100V.A programmable volt-second clamp allows primary switch duty cycles above 50% for high switch, transformer and rectifier utilization. Active clamp control reduces switch voltage stress and increases efficiency. A synchronous output is available for controlling secondary side synchronous rectification.The LT3752/LT3752-1 are available in a 38-lead plastic TSSOP package with missing pins for high voltage spacings.ApplicationsOffline and HV Car Battery Isolated Power Supplies48V Telecommunication Isolated Power SuppliesIndustrial, Automotive and Military Systems