LM5045SQ/NOPB
ActiveCURRENT MODE PWM CONTROLLER 2A 100KHZ TO 2000KHZ 28-PIN WQFN EP T/R
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LM5045SQ/NOPB
ActiveCURRENT MODE PWM CONTROLLER 2A 100KHZ TO 2000KHZ 28-PIN WQFN EP T/R
Technical Specifications
Parameters and characteristics for this part
| Specification | LM5045SQ/NOPB |
|---|---|
| Control Features | Frequency Control, Soft Start, Sync |
| Fault Protection | Over Temperature, Current Limiting, Over Voltage |
| Frequency - Switching [Max] | 2 MHz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Isolation | Isolated |
| Package / Case | 28-WFQFN Exposed Pad |
| Supplier Device Package | 28-WQFN (5x5) |
| Topology | Full-Bridge |
| Voltage - Supply (Vcc/Vdd) [Max] | 100 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 14 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 5.94 | |
| 10 | $ 5.33 | |||
| 25 | $ 5.04 | |||
| 100 | $ 4.37 | |||
| 250 | $ 4.14 | |||
| 500 | $ 3.72 | |||
| Digi-Reel® | 1 | $ 5.94 | ||
| 10 | $ 5.33 | |||
| 25 | $ 5.04 | |||
| 100 | $ 4.37 | |||
| 250 | $ 4.14 | |||
| 500 | $ 3.72 | |||
| Tape & Reel (TR) | 1000 | $ 3.14 | ||
| 2000 | $ 2.98 | |||
| Texas Instruments | SMALL T&R | 1 | $ 4.48 | |
| 100 | $ 3.93 | |||
| 250 | $ 2.75 | |||
| 1000 | $ 2.22 | |||
Description
General part information
LM5045 Series
The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.
The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.
Documents
Technical documentation and resources
