LT3956IUHE#PBF
ActiveDC-DC SWITCHING BOOST, BUCK REGULATOR, ADJUSTABLE, 4.5 TO 80 V IN, 80V/3.3A OUT, QFN-EP-36
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LT3956IUHE#PBF
ActiveDC-DC SWITCHING BOOST, BUCK REGULATOR, ADJUSTABLE, 4.5 TO 80 V IN, 80V/3.3A OUT, QFN-EP-36
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Technical Specifications
Parameters and characteristics for this part
| Specification | LT3956IUHE#PBF |
|---|---|
| Current - Output / Channel | 3.3 A |
| Dimming | Analog, PWM |
| Frequency [Max] | 1 MHz |
| Frequency [Min] | 100 kHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Package / Case | 36-WFQFN, 28 Leads, Exposed Pad |
| Supplier Device Package | 36-QFN |
| Supplier Device Package [x] | 5 |
| Supplier Device Package [y] | 6 |
| Topology | Step-Up (Boost), Flyback, Step-Down (Buck), SEPIC |
| Type | DC DC Regulator |
| Voltage - Output | 80 V |
| Voltage - Supply (Max) [Max] | 80 V |
| Voltage - Supply (Min) [Min] | 4.5 V |
| Part | Dimming | Frequency [Max] | Frequency [Min] | Supplier Device Package [y] | Supplier Device Package [x] | Supplier Device Package | Voltage - Supply (Max) [Max] | Current - Output / Channel | Topology | Number of Outputs | Voltage - Supply (Min) [Min] | Internal Switch(s) | Voltage - Output | Type | Operating Temperature [Min] | Operating Temperature [Max] | Mounting Type | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc./Maxim Integrated | Analog PWM | 1 MHz | 100 kHz | 6 | 5 | 36-QFN | 80 V | 3.3 A | Flyback SEPIC Step-Down (Buck) Step-Up (Boost) | 1 | 4.5 V | 80 V | DC DC Regulator | -40 C | 125 °C | Surface Mount | 36-WFQFN 28 Leads Exposed Pad | |
 Analog Devices Inc./Maxim Integrated | Analog PWM | 1 MHz | 100 kHz | 6 | 5 | 36-QFN | 80 V | 3.3 A | Flyback SEPIC Step-Down (Buck) Step-Up (Boost) | 1 | 4.5 V | 80 V | DC DC Regulator | -40 C | 125 °C | Surface Mount | 36-WFQFN 28 Leads Exposed Pad | |
Analog Devices Inc./Maxim Integrated | Analog PWM | 1 MHz | 100 kHz | 6 | 5 | 36-QFN | 80 V | 3.3 A | Flyback SEPIC Step-Down (Buck) Step-Up (Boost) | 1 | 4.5 V | 80 V | DC DC Regulator | -40 C | 125 °C | Surface Mount | 36-WFQFN 28 Leads Exposed Pad | |
Analog Devices Inc./Maxim Integrated | Analog PWM | 1 MHz | 100 kHz | 6 | 5 | 36-QFN | 80 V | 3.3 A | Flyback SEPIC Step-Down (Buck) Step-Up (Boost) | 1 | 4.5 V | 80 V | DC DC Regulator | -40 C | 125 °C | Surface Mount | 36-WFQFN 28 Leads Exposed Pad | |
 Analog Devices Inc./Maxim Integrated | Analog PWM | 1 MHz | 100 kHz | 6 | 5 | 36-QFN | 80 V | 3.3 A | Flyback SEPIC Step-Down (Buck) Step-Up (Boost) | 1 | 4.5 V | 80 V | DC DC Regulator | -40 C | 125 °C | Surface Mount | 36-WFQFN 28 Leads Exposed Pad |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
LT3956 Series
The LT3956 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It is ideally suited for driving high current LEDs. It features an internal low side N-channel power MOSFET rated for 84V at 3.3A and driven from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize efficiency, performance or external component size.The LT3956 senses output current at the high side of the LED string. High side current sensing is the most flexible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode configuration. The PWM input provides LED dimming ratios of up to 3000:1, and the CTRL input provides additional analog dimming capability.ApplicationsHigh Power LEDBattery ChargerAccurate Current Limited Voltage Regulator
Documents
Technical documentation and resources