Flyback, Forward and Isolated Controllers

Analog Devices’ portfolio of flyback and forward controllers provides a simple cost-effective replacement of dc-to-dc converter bricks used in isolated and non-isolated applications. Power levels of up to 100 W using a flyback controller and up to a few kilowatts with a forward controller can be attained. Analog Devices’ proprietary iCoupler® technology is integrated in several forward controllers, which eliminates bulky signal transformers and optocouplers that transmit signals over the isolation boundary. Many of the flyback controllers do not need an optocoupler, which reduces design complexity and cost, while improving overall system reliability. Several off-the-shelf transformers for both topologies are shown in the product data sheets, which further simplifies the design and allows for the fastest time to market.

Flyback, Forward & Isolated Controllers

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SortOrderPart#Number of OutputsVin
(min)
(V)
Vin
(max)
(V)
Output Power
(typ)
(W)
TopologyMonolithicCommentsPrice (1000+)
($ US)
1ADP1032 2 4.5 60 2.5 Buck, Flyback Yes Isolated Flyback with additional Buck and Inverter, plus High Speed Isolated Digital Channels $5.18 (ADP1032ACPZ-4-R7)
2LT3002 1 4 36 10 Flyback, No-Opto Flyback Yes 36V 10W No-Opto Isolated Flyback Converter $2.80 (LT3002ES8E#PBF)
3LT3001 1 4 36 4 Flyback, No-Opto Flyback Yes 36V 4W No-Opto Isolated Flyback Converter $1.95 (LT3001ES5#TRMPBF)
4ADP1031 3 4.5 60 1.7 Buck, Flyback, Inverting Yes Isolated Flyback with additional Buck and Inverter, plus High Speed Isolated Digital Channels $5.18 (ADP1031ACPZ-4)
5LT8316 1 16 600 100 Buck, Flyback, No-Opto Flyback No 600Vin Micropower No-Opto Isolated Flyback Controller $2.18 (LT8316EFE#PBF)
6ADP1071-2 1 4.5 60- Flyback Yes Flyback controller with integrated isolation and SR drive $3.50 (ADP1071-2ARWZ)
7ADP1071-1 1 450m 6- Flyback Yes Flyback controller with integrated isolation and SR drive $3.50 (ADP1071-1ARWZ)
8ADP1074 1 1 60- Flyback, Forward No Isolated, Synchronous Forward Controller with Active Clamp and iCoupler $3.96 (ADP1074ARWZ)
9LTC1871X 1 2.5 36 50 Boost, Flyback, Inverting, Sepic No Wide Input Range, Boost, Flyback and SEPIC Controller, 175C Max Junction Temp $125.00 (LTC1871XMS#PBF)
10LT8315 1 18 560 15 Flyback, No-Opto Flyback Yes 560VIN Micropower No-Opto Isolated Flyback Converter with 630V/300mA Switch $4.10 (LT8315EFE#PBF)
11LT8303 1 5.5 100 5 Flyback, No-Opto Flyback Yes 100VIN Micropower No-Opto Isolated Flyback Converter with 150V/450mA Switch $3.15 (LT8303ES5#TRPBF)
12LT8304 1 3 100 24 Flyback, No-Opto Flyback Yes 100VIN Micropower No-Opto Isolated Flyback Converter with 150V/2A Switch $3.55 (LT8304ES8E#PBF)
13LT8331 1 4.5 100 15 Boost, Flyback, Inverting, Sepic Yes Low IQ Boost/SEPIC/Flyback/Inverting Converter with 0.5A, 140V Switch $2.95 (LT8331EMSE#PBF)
14LT8310 1 6 100 150 Forward No 100VIN Forward Converter Controller $2.99 (LT8310EFE#PBF)
15LT3999 1 2.7 36 10 Push-Pull Yes Low Noise, 1A, 1MHz Push-Pull DC/DC Driver with Duty Cycle Control $2.75 (LT3999EDD#PBF)
16LT8471 2 2.6 50 20 Boost, Buck, Flyback, Inverting, Sepic, Zeta Yes Dual, Multitopology (Buck/Boost/SEPIC/Inverter/Flyback) $3.75 (LT8471EFE#PBF)
17LT8309 1 4.5 40 80 Flyback Synchronous Rectifier No Secondary-Side Synchronous Rectifier Driver $1.82 (LT8309ES5#TRPBF)
18LT8301Reference Circuit Available 1 2.7 42 6 Flyback, No-Opto Flyback Yes 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch $2.76 (LT8301ES5#TRPBF)
19LT3753 1 8.5 100 400 Forward No Active Clamp Synchronous Forward Controller $3.19 (LT3753EFE#PBF)
20LT3752-1 1 10 400 400 Forward No Active Clamp Synchronous Forward, Internal Housekeeping Controller, Vin 400V+ $3.39 (LT3752EFE-1#PBF)
21LT3752 1 6.5 100 400 Forward No Active Clamp Synchronous Forward, Internal Housekeeping Controller, Up to 100Vin $3.39 (LT3752EFE#PBF)
22LT8302 1 2.8 42 18 Flyback, No-Opto Flyback Yes 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/3.6A Switch $3.47 (LT8302ES8E#PBF)
23LT8300 1 6 100 2.5 Flyback, No-Opto Flyback Yes 100Vin Micropower No-Opto Isolated Flyback Converter with 150V/260mA Switch $3.01 (LT8300ES5#TRPBF)
24LT3957A 1 3 40 30 Boost, Flyback, Inverting, Sepic Yes Multi-topology Converter 5A, 40V Switch, Improved Load Transient Over LT3957 $2.95 (LT3957AEUHE#PBF)
25LT3798 1 10 38 80 Flyback, No-Opto Flyback No Isolated No Opto-Coupler Flyback Controller with Active PFC $2.25 (LT3798EMSE#PBF)
26LTC3766 1 8 75 500 Forward No High Efficiency, Secondary-Side Synchronous Forward Controller $3.88 (LTC3766EGN#PBF)
27LTC3765 1 8 75 500 Forward No Active Clamp Forward Controller and Gate Driver $2.56 (LTC3765EMSE#PBF)
28LT3511 1 4.5 100 2.5 Flyback, No-Opto Flyback Yes Monolithic High Voltage Isolated Flyback Converter $2.95 (LT3511EMS#PBF)
29LT3748 1 5 100 80 Flyback, No-Opto Flyback No 100V Isolated Flyback Controller $3.12 (LT3748EMS#PBF)
30LT3575 1 3 40 14 Flyback, No-Opto Flyback Yes Isolated Flyback Converter without an Opto-Coupler $2.97 (LT3575EFE#PBF)
31LT3958 1 5 80 50 Boost, Flyback, Inverting, Sepic Yes High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter $3.05 (LT3958EUHE#PBF)
32LT3581 1 2.3 22 20 Boost, Flyback, Inverting, Sepic Yes 3.3A Boost/Inverting DC/DC Converter $2.45 (LT3581EDE#PBF)
33LT3579-1 1 2.5 16- Boost, Inverting, Sepic Yes 6A Boost/Inverting DC/DC Converter with Fault Protection, Dual Phase Capable $3.30 (LT3579EUFD-1#PBF)
34LT3579 1 2.5 16 60 Boost, Flyback, Inverting, Sepic Yes 6A Boost/Inverting DC/DC Converter with Fault Protection $3.30 (LT3579EUFD#PBF)
35LT3512 1 4.5 100 4.5 Flyback, No-Opto Flyback Yes Monolithic High Voltage Isolated Flyback Converter $3.15 (LT3512EMS#PBF)
36LT3758A 1 5.5 100 50 Boost, Flyback, Inverting, Sepic No Multi-Topology Controller - Improved Load Transient Over LT3758 $2.35 (LT3758AEDD#PBF)
37LT3757A 1 2.9 40 50 Boost, Flyback, Inverting, Sepic No Multi-Topology Controller - Improved Load Transient Over LT3757 $2.06 (LT3757AEDD#PBF)
38LT3574 1 3 40 3 Flyback, No-Opto Flyback Yes Isolated Flyback Converter Without an Opto-Coupler $2.76 (LT3574EMS#PBF)
39LT3751 1 5 24 60 Capacitor Charger, Flyback No Capacitor Charger Controller with Regulation $3.65 (LT3751EUFD#PBF)
40LT3573 1 3 40 7 Flyback, No-Opto Flyback Yes Isolated Flyback Converter Without an Opto-Coupler $2.76 (LT3573EMSE#PBF)
41LTC3805-5 1 4.5 75 50 Boost, Flyback No Adjustable Frequency Current Mode Flyback, LTC3805-5 4.5V Turn On Voltage $1.39 (LTC3805EDD-5#PBF)
42LTC3873-5 1 4 75 50 Boost, Flyback, Sepic No No RSENSE Boost, LTC3873-5 5V to 75V During Start-Up $1.25 (LTC3873EDDB-5#TRPBF)
43LTC3873 1 8.8 75 50 Boost, Flyback, Sepic No No RSENSE Boost, LTC3873 9V to 75V During Start-Up $1.25 (LTC3873EDDB#TRPBF)
44LTC1871-1 1 2.5 36 50 Boost, Flyback, Inverting, Sepic No No RSENSE Current Mode Boost, LTC1871-1 Lower Burst Mode Threshold $2.65 (LTC1871EMS-1#PBF)
45LTC3803-3 1 9.2 75 15 Flyback No SOT-23 Flyback Controller, LTC3803-3 8.7V Turn On Voltage, 300kHz $1.12 (LTC3803ES6-3#TRPBF)
46LT3837 1 4.5 20 80 Flyback, No-Opto Flyback No Isolated No-Opto Synchronous Flyback Controller $3.10 (LT3837EFE#PBF)
47LTC3805 1 8.8 75 50 Boost, Flyback, Sepic No Adjustable Frequency Current Mode Flyback, LTC3805 8.4V Turn On Voltage $1.39 (LTC3805EDD#PBF)
48LTC3783 1 3 36 25 Boost, Flyback, LED Driver, Sepic No PWM LED Driver and Boost, Flyback and SEPIC Converter $2.85 (LTC3783EDHD#PBF)
49LT3825 1 14 75 80 Flyback, No-Opto Flyback No Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range $3.10 (LT3825EFE#PBF)
50LT3750 1 3 24 60 Capacitor Charger, Flyback No Capacitor Charger Controller $3.50 (LT3750EMS#PBF)
51LTC3803-5 1 5.7 75 15 Flyback No SOT-23 Flyback Controller, LTC3803-5 4.8V Turn On Voltage, 200kHz $1.12 (LTC3803ES6-5#TRPBF)
52LT1952-1 1 8.3 25 300 Flyback, Forward No Single Switch Synchronous Forward Controller, LT1952-1: 400µA; VIN On/Off = 7.75V/6.5V $3.30 (LT1952EGN-1#PBF)
53LT1952 1 15.75 25 300 Flyback, Forward No Single Switch Synchronous Forward Controller, LT1952: 460µA; VIN On/Off = 14.25V/8.75V $3.30 (LT1952EGN#PBF)
54LTC3721-1 1 10.7 75 750 Push-Pull No Push-Pull PWM Controller $4.45 (LTC3721EGN-1#PBF)
55LTC3803 1 9.2 75 15 Flyback No SOT-23 Flyback Controller, LTC3803 8.7V Turn On Voltage, 200kHz $1.12 (LTC3803ES6#TRPBF)
56LTC3723-2 1 10.7 75 300 Push-Pull No Synchronous Push-Pull PWM Controllers, LTC3723-2 Voltage Mode $4.55 (LTC3723EGN-2#PBF)
57LTC3723-1 1 10.7 75 300 Push-Pull No Synchronous Push-Pull PWM Controllers, LTC3723-1 Current Mode $4.55 (LTC3723EGN-1#PBF)
58LT1950 1 3 25 300 Flyback, Forward No Boost, flyback and forward controller. transformer and MOSFET protection $2.90 (LT1950EGN#PBF)
59LTC3806 1 10 75 60 Flyback No Synchronous Flyback DC/DC Controller $3.40 (LTC3806EDE#PBF)
60LTC3722-2 1 10.5 75 4k Full Bridge No Synchronous Dual Mode Full Bridge Controllers, LTC3722-2 Current Mode $5.50 (LTC3722EGN-2#PBF)
61LTC3722-1 1 10.5 75 4k Full Bridge No Synchronous Dual Mode Full Bridge Controllers, LTC3722-1 Current Mode $5.50 (LTC3722EGN-1#PBF)
62LTC1871-7 1 2.5 36 50 Boost, Flyback, Inverting, Sepic No LTC1871-7 Drives 6V-gate N-Channel MOSFETs $2.65 (LTC1871EMS-7#PBF)
63LT3781 1 8 72 300 Forward No Bootstrap start dual transistor synchronous forward controller $4.95 (LT3781EG#PBF)
64LT3439 1 2.8 20 10 Push-Pull Yes Slew Rate Controlled Ultralow Noise1A Isolated DC/DC Transformer Driver $3.50 (LT3439EFE#PBF)
65LTC1871 1 2.5 36 50 Boost, Flyback, Inverting, Sepic No No RSENSE Current Mode Boost, Flyback and SEPIC Controller $2.65 (LTC1871EMS#PBF)
66LT1681 1 9 72 300 Forward No Dual transistor synchronous forward controller $5.00 (LT1681ESW#PBF)
67LTC1922-1 1 3.8 10.3 300 Full Bridge No Synchronous phase modulated full-bridge controller. adaptive DirectSense zero voltage switching $5.50 (LTC1922EG-1#PBF)
68LT1737 1 5 22 25 Flyback No High Power Isolated Flyback Controller $2.90 (LT1737CS#PBF)
69LT1725 1 16 75 50 Flyback No General Purpose Isolated Flyback Controller $2.90 (LT1725CS#PBF)
70LT1680 1 4 60 300 Boost No High input voltage, Synchronizable $4.00 (LT1680CN#PBF)
71LT1425 1 2.8 20 6 Flyback, No-Opto Flyback Yes Isolated flyback, 5% accurate Vout $2.90 (LT1425CS#PBF)