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LTC3806EDE

Description
DC/DC Cntrlr Dual-OUT Flyback 290kHz Automotive 12-Pin DFN EP
File Size213KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual Parametric Compare View All

LTC3806EDE Overview

DC/DC Cntrlr Dual-OUT Flyback 290kHz Automotive 12-Pin DFN EP

LTC3806EDE Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
HTS8542.39.00.01
SVHCYes
SVHC Exceeds ThresholdYes
Number of Outputs2
TopologyFlyback
Maximum Switching Frequency (kHz)290
Minimum Input Voltage (V)10
Maximum Input Voltage (V)75
Operating Supply Voltage (V)10(Min)
Maximum Supply Current (mA)1(Typ)
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
Pin Count12
Standard Package NameDFN
Supplier PackageDFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length4
Package Width3
PCB changed12
Lead ShapeNo Lead
LTC3806
Synchronous
Flyback DC/DC Controller
FEATURES
DESCRIPTIO
High Efficiency at Full Load
Better Cross Regulation Than Nonsynchronous
Converters (Multiple Outputs)
Soft-Start Minimizes Inrush Current
Current Mode Control Provides Excellent
Transient Response
High Maximum Duty Cycle: 89% Typical
±2%
Programmable Undervoltage Lockout Threshold
±1%
Internal Voltage Reference
Micropower Start-Up
Constant Frequency Operation (Never Audible)
3mm
×
4mm 12-Pin DFN Package
The LTC
®
3806 is a current mode synchronous flyback
controller that drives N-channel power MOSFETs and
requires very few external components. It is intended for
medium power applications where multiple outputs are
required. Synchronous rectification provides higher effi-
ciency and improved output cross regulation than
nonsynchronous converters.
The IC contains all the necessary control circuitry includ-
ing a 250kHz oscillator, precision undervoltage lockout
circuit with hysteresis, gate drivers for primary and syn-
chronous switches, current mode control circuitry and
soft-start circuitry.
Programmable soft-start reduces inrush currents. This
makes it easier to design compliant Power Over Ethernet
supplies.
Low start-up current reduces power dissipation in the
start-up resistor and reduces the size of the external start-
up capacitor.
The LTC3806 is available in a 12-pin, exposed pad DFN
package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
48V Telecom Supplies
12V/42V Automotive
24V Industrial
VoIP Phone
Power Over Ethernet
TYPICAL APPLICATIO
V
IN
36V TO 72V
R1
51k
R2
604k
C7
4.7μF
LTC3806
RUN SENSE
R8
100Ω
I
TH
FB
V
IN
C1
100μF
R3
26.7k
C2
1nF
R4
3.4k
INTV
CC
C3
4.7μF
SS
G2
G1
GND
D1
T1
M1
M2
C4
0.47μF
R5
0.056Ω
R7
12.4k
R6
21k
Figure 1. Multiple Output Flyback Converter for Telecom
3806fb
U
V
OUT1
3.3V
V
OUT2
3A
2.5V
3A
M3
C5
470μF
C6
470μF
3806 F01
U
U
1

LTC3806EDE Related Products

LTC3806EDE LTC3806EDE#PBF LTC3806EDE#TR LTC3806EDE#TRPBF
Description DC/DC Cntrlr Dual-OUT Flyback 290kHz Automotive 12-Pin DFN EP DC/DC Cntrlr Dual-OUT Flyback 290kHz Automotive 12-Pin DFN EP Tube DC/DC Cntrlr Dual-OUT Flyback 290kHz Automotive 12-Pin DFN EP T/R DC/DC Cntrlr Dual-OUT Flyback 290kHz Automotive 12-Pin DFN EP T/R
EU restricts the use of certain hazardous substances Not Compliant Compliant Not Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99
Part Status Unconfirmed Active Unconfirmed Active
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Number of Outputs 2 2 2 2
Topology Flyback Flyback Flyback Flyback
Maximum Switching Frequency (kHz) 290 290 290 290
Minimum Input Voltage (V) 10 10 10 10
Maximum Input Voltage (V) 75 75 75 75
Operating Supply Voltage (V) 10(Min) 10(Min) 10(Min) 10(Min)
Maximum Supply Current (mA) 1(Typ) 1(Typ) 1(Typ) 1(Typ)
Minimum Operating Temperature (°C) -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85
Supplier Temperature Grade Extended Extended Extended Extended
Pin Count 12 12 12 12
Standard Package Name DFN DFN DFN DFN
Supplier Package DFN EP DFN EP DFN EP DFN EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 4 4 4 4
Package Width 3 3 3 3
PCB changed 12 12 12 12
Lead Shape No Lead No Lead No Lead No Lead
Packaging - Tube Tape and Reel Tape and Reel
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