Product Descriptions
The LT3753 is a current mode PWM controller optimized for an active clamp forward converter topology, allowing up to 100V input operation.
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 LT3753 is available in a 38-lead plastic TSSOP package with missing pins for high voltage spacings.
Product Features
? Input Voltage Range: 8.5V to 100V
? 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 Clo
Product Applications
? Industrial, Automotive and Military Systems
? 48V Telecommunication Isolated Power Supplies
Specifications
| Attribute | Attribute value |
| ANSM-Part# | ANSM-LT3753MPFE |
| Category | Integrated Circuits (ICs) |
| Power Management (PMIC) | |
| DC DC Switching Controllers | |
| Mfr | Original |
| Series | - |
| Package | REEL |
| Product Status | Obsolete |
| Output Type | Transistor Driver |
| Function | Step-Up/Step-Down |
| Output Configuration | Positive, Isolation Capable |
| Topology | Forward Converter |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 8.5V ~ 100V |
| Frequency - Switching | 100kHz ~ 500kHz |
| Duty Cycle (Max) | - |
| Synchronous Rectifier | Yes |
| Clock Sync | Yes |
| Serial Interfaces | - |
| Control Features | Frequency Control, Soft Start |
| Operating Temperature | -55°C ~ 150°C |
| Mounting Type | Surface Mount |
| Package / Case | 38-TFSOP (0.173", 4.40mm Width) 31 Leads, Exposed Pad |
| Supplier Device Package | 38-TSSOP-EP |
| Base Product Number | LT3753 |
Actual product photos
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