 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LT3782EUFD-PBF Datasheet(PDF) 6 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LT3782EUFD-PBF Datasheet(HTML) 6 Page - Linear Technology |
|
|
6 / 20 page  LT3782 6 3782ff SGATE2 (Pin 1/Pin 26): Second Phase Synchronous Drive Signal. An external driver buffer is needed to drive the top synchronous power FET. SGATE1 (Pin 2/Pin 27): First Phase Synchronous Drive Signal. An external driver buffer is needed to drive the top synchronous power FET. GND (Pin 4/Pin 28): Chip Ground. SYNC (Pin 5/Pin 1): Synchronization Input. The pulse width can range from 10% to 70%. Note that the operating frequency is half of the sync frequency. DELAY (Pin 6/Pin 2): When synchronous drivers are used, the programmable delay that delays BGATE turns on after SGATE turns off. DCL (Pin 7/Pin 3): This pin programs the limit of the maxi- mum duty cycle. When connected to VRSET, it operates at natural maximum duty cycle, approximately 90%. SENSE1+ (Pin 8/Pin 4): First Phase Current Sense Amplifier Positive Input. An RC filter is required across the current sense resistor. Current limit threshold is set at 60mV. SENSE1– (Pin 9/Pin 5): First Phase Current Sense Amplifier Negative Input. An RC filter is required across the current sense resistor. SLOPE (Pin 10/Pin 6): A resistor from SLOPE to GND increases the internal current mode PWM slope com- pensation. RSET (Pin 11/Pin 7): A resistor from RSET to GND sets the oscillator charging current and the operating frequency. SENSE2– (Pin 12/Pin 8): Second Phase Current Sense Amplifier Negative Input. An RC filter is required across the current sense resistor. SENSE2+ (Pin 13/Pin 10): Second Phase Current Sense Amplifier Positive Input. An RC filter is required across the current sense resistor. Current limit threshold is set at 60mV. SS (Pin 14/Pin 11): Soft-Start. A capacitor on this pin sets the output ramp up rate. The typical time for SS to reach the programmed level is (C • 2.44V)/10μA. VC (Pin 15/Pin 12): The output of the gm error amplifier and the control signal of the current loop of the current-mode PWM. Switching starts at 0.7V, and higher VC voltages corresponds to higher inductor current. FB (Pin 16/Pin 13): Error Amplifier Inverting Input. A resistor divider to this pin sets the output voltage. RUN (Pin 17/Pin 14): LT3782 goes into shutdown mode when VRUN is below 2.2V and goes to low bias current shutdown mode when VRUN is below 0.3V. VEE2 (Pin 19/Pin 16): Gate Driver BGATE2 Ground. This pin should be connected to the ground side of the second current sense resistor. BGATE2 (Pin 20/Pin 17): Second Phase MOSFET Driver. GBIAS2 (Pin 21/Pin 18): Bias for Gate Driver BGATE2. Should be connected to GBIAS or an external power supply between 12V to 14V. A bypass low ESR capacitor of 2μF or larger is needed and should be connected directly to the pin to minimize parasitic impedance. GBIAS1 (Pin 22/Pin 21): Bias for Gate Driver BGATE1. Should be connected to GBIAS2. BGATE1 (Pin 23/Pin 22): First Phase MOSFET Driver. VEE1 (Pin 24/Pin 23): Gate Driver BGATE1 Ground. This pin should be connected to the ground side of the second current sense resistor. VCC (Pin 27/Pin 24): Chip Power Supply. Good supply bypassing is required. GBIAS (Pin 28/Pin 25): Internal 11V regulator output for biasing internal circuitry. Should be connected to GBIAS1 and GBIAS2. Exposed Pad (Pin 29/Pin 29): The exposed package pad is fused to internal ground and is for heat sinking. Solder the bottom metal plate onto expanded ground plane for optimum thermal performance. NC (Pins 3, 18, 25, 26/Pins 9, 15, 19, 20): Not Connected. Can be connected to GND. (FE/UFD) PIN FUNCTIONS |
Similar Part No. - LT3782EUFD-PBF |
|
Similar Description - LT3782EUFD-PBF |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
