Analog Devices LT3799 | Demoboard DC1775A | Würth Elektronik Reference Design Search

reference designLT3799 | Demoboard DC1775A

Overview

Topology	Other Topology
IC revision	4

Description

Demonstration circuit 1775A is an off-line isolated flyback LED driver featuring the LT®3799. The demo board provides a constant-current output of 0.5A over an LED string voltage of 20V and 30V. It is optimized to operateover a wide AC input voltage range (90VAC to 270VAC). LED current typically stays within ±4% over the whole input voltage range. The DC1775A provides a steep decline in LED current with decreasing TRIAC dimming angle, toachieve a wide TRIAC dimming range. It is designed to comply with IEC 61000-3-2 Class C harmonics standard and EN55015B conducted EMI standard.

The LT3799 controls an isolated flyback converter in boundary mode. Its unique bleeder circuit makes the LED driver compatible with TRIAC dimmers without additional components. Its novel current sensing scheme delivers a well-regulated output current to the secondary side without using an opto-coupler. Open- and shorted-LED protection ensures long-term reliability.

The LT3799 is available in a low profile, thermally-enhanced 16-lead MSOP package.

The LT3799 data sheet gives a complete description of the part, operation and application info rmation. The data sheet must be read in conjunction with this quick start guide for demo circuit 1775A.

Features

Remarks:L1=750uH L2=39mH And Transformer T1 UsedRefer page no.7

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Products

Order Code	Datasheet	Downloads	Status	Product series	V_IN	V_Out1 (V)	I_Out1 (mA)	V_aux (V)	R_{DC 1} (Ω)	R_{DC 2} (Ω)	R_{DC 3} (Ω)	f_switch (kHz)	L (mH)	N_PRI : N_SEC : N_AUX	I_SAT (mA)	V_T (V (AC))	L (mm)	W (mm)	H (mm)	Mount	Size
7508110210	SPEC	7 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP IGS 070-5449 (rev1).IGS \| 4.1 MB STP 070-5449 (rev1).STEP \| 1.7 MB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	85 - 141 V (AC)	11	350	15	5.1	0.092	1.35	100	2	6.67:1:1.67	270	4500	15	15.75	18.5	THT	EE13/6/6
750813144	SPEC	7 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP IGS 070-5278 (rev1).IGS \| 3.2 MB STP 070-5278 (rev1).STEP \| 1.4 MB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	85 - 265 V (AC)	28	500	20	2.4	0.241	1.55	100	0.6	4:1:0.71	1750	4500	18.5	16.5	18.8	THT	EE16/7/5
750811290	SPEC	8 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP 3D 3D_070-4869 (rev1).PDF \| 42.4 KB IGS 070-4869 (rev1).IGS \| 1.8 MB STP Download_STP_070-4869 (rev1).STEP \| 765.1 KB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	85 - 265 V (AC)	125	360	21.25	0.6	0.254	0.11	150	0.461	1:1:0.17	3150	4500	31	31	25	THT	ER28/14
750811291	SPEC	8 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP 3D 3D_070-4869 (rev1).PDF \| 42.4 KB IGS 070-4869 (rev1).IGS \| 1.8 MB STP Download_STP_070-4869 (rev1).STEP \| 765.1 KB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	85 - 265 V (AC)	85	400	20	0.55	1.23	1.1	60	0.4	1:1:0.24	5700	4500	31	31	25	THT	ER28/14
750811330	SPEC	8 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP 3D 3D_070-5455 (rev1).PDF \| 65.4 KB IGS 070-5455 (rev1).IGS \| 3.3 MB STP 070-5455 (rev1).STEP \| 1.5 MB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	85 - 265 V (AC)	18	5000	18	0.15	0.008	0.042	200	0.3	6:1:1	4000	4500	39.6	43.18	30.48	THT	ETD34
750813390	SPEC	8 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP 3D 3D_070-5455 (rev1).PDF \| 65.4 KB IGS 070-5455 (rev1).IGS \| 3.3 MB STP 070-5455 (rev1).STEP \| 1.5 MB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 8 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	85 - 265 V (AC)	90	1000	19.8	0.15	0.223	0.055	75	0.1	1:1:0.22	9000	4500	39.6	43.18	30.48	THT	ETD34
750813002	SPEC	7 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP IGS 070-5449 (rev1).IGS \| 4.1 MB STP 070-5449 (rev1).STEP \| 1.7 MB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	90 - 265 V (AC)	3.4	1000	17	6.25	0.016	1.7	100	2	20:1:5	350	4500	15	15.75	18.5	THT	EE13/6/6
750813134	SPEC	7 files EDA models: Components ZIP ALT Altium_WE-OLLT (rev24a).IntLib \| 2.6 MB CDS Cadence_WE-OLLT (rev24a).zip \| 5.5 MB EAG Eagle_WE-OLLT (rev24a).lbr \| 151.5 KB CAD files ZIP IGS 070-5278 (rev1).IGS \| 3.2 MB STP 070-5278 (rev1).STEP \| 1.4 MB Electric models ZIP LT LT Spice_WE-OLLT (rev24a).zip \| 19.1 KB PSP PSpice_WE-OLLT (rev24a).zip \| 12.4 KB Download all 7 files as zip archive ZIP	Active i\| Production is active. Expected lifetime: >10 years.	WE-OLLT Offline Flyback Transformers	90 - 265 V (AC)	14	1000	18	1.85	0.06	1.35	100	0.6	8:1:1.29	1750	4500	18	16.5	18	THT	EE16/7/5

	Order Code	Datasheet	Simulation
	7508110210	SPEC
	750813144	SPEC
	750811290	SPEC
	750811291	SPEC
	750811330	SPEC
	750813390	SPEC
	750813002	SPEC
	750813134	SPEC

Samples

	Order Code	Datasheet	Simulation	Downloads	Status	Product series	V_IN	V_Out1 (V)	I_Out1 (mA)	V_aux (V)	R_{DC 1} (Ω)	R_{DC 2} (Ω)	R_{DC 3} (Ω)	f_switch (kHz)	L (mH)	N_PRI : N_SEC : N_AUX	I_SAT (mA)	V_T (V (AC))	L (mm)	W (mm)	H (mm)	Mount	Size	Samples

IC manufacturers (99)

Analog Devices LT3799 | Demoboard DC1775A

LT3799 Demo Board - Offline Isolated Flyback Controller with PFC - Universal Input, VOUT(NOM) = 28V, I LED = 0.5A

Overview

Description

Features

More information

Products

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