Datasheet LT8301 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch |
| Páginas / Página | 24 / 1 — FEATURES. DESCRIPTION. 2.7V to 42V Input Voltage Range. 1.2A, 65V … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 1.4 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. 2.7V to 42V Input Voltage Range. 1.2A, 65V Internal DMOS Power Switch. Low Quiescent Current:
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LT8301 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch
FEATURES DESCRIPTION
n
2.7V to 42V Input Voltage Range
The LT®8301 is a micropower isolated flyback converter. n
1.2A, 65V Internal DMOS Power Switch
By sampling the isolated output voltage directly from the n
Low Quiescent Current:
primary-side flyback waveform, the part requires no third n
100µA in Sleep Mode
winding or opto-isolator for regulation. The output voltage n
350µA in Active Mode
is programmed with a single external resistor. Internal n
Boundary Mode Operation at Heavy Load
compensation and soft-start further reduce external com- n
Low-Ripple Burst Mode
®
Operation at Light Load
ponent count. Boundary mode operation provides a small n
Minimum Load <0.5% (Typ) of Full Output
magnetic solution with excel ent load regulation. Low n
VOUT Set with a Single External Resistor
ripple Burst Mode operation maintains high efficiency at n No Transformer Third Winding or Opto-Isolator light load while minimizing the output voltage ripple. A Required for Regulation 1.2A, 65V DMOS power switch is integrated along with n Accurate EN/UVLO Threshold and Hysteresis all high voltage circuitry and control logic into a 5-lead n Internal Compensation and Soft-Start ThinSOT™ package. n Output Short-Circuit Protection The LT8301 operates from an input voltage range of 2.7V n 5-Lead TSOT-23 Package to 42V and can deliver up to 6W of isolated output power. n AEC-Q100 Qualified for Automotive Applications The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low
APPLICATIONS
component count, and high efficiency application solution n Isolated Telecom, Automotive, Industrial, Medical for isolated power delivery. Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 5438499, 7463497, and 7471522. n Isolated Auxiliary/Housekeeping Power Supplies
TYPICAL APPLICATION Efficiency vs Load Current 2.7V to 36VIN/5VOUT Micropower Isolated Flyback Converter
90 V + 85 IN VOUT 3:1 2.7V TO 36V 5V 10µF 6mA TO 0.40A (V • IN = 5V) 80 40µH 4.4µH 6mA TO 0.70A (V V IN = 12V) IN 100µF 6mA TO 1.00A (VIN = 24V) • 6mA TO 1.15A (V EN/UVLO SW IN = 36V) 75 LT8301 V – OUT 154k 8301 TA01a EFFICIENCY (%) 70 RFB V GND IN = 5V 65 VIN = 12V VIN = 24V VIN = 36V 60 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) 8301 TA01b Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
2.7V to 42V Input Voltage Range
The LT®8301 is a micropower isolated flyback converter. n
1.2A, 65V Internal DMOS Power Switch
By sampling the isolated output voltage directly from the n
Low Quiescent Current:
primary-side flyback waveform, the part requires no third n
100µA in Sleep Mode
winding or opto-isolator for regulation. The output voltage n
350µA in Active Mode
is programmed with a single external resistor. Internal n
Boundary Mode Operation at Heavy Load
compensation and soft-start further reduce external com- n
Low-Ripple Burst Mode
®
Operation at Light Load
ponent count. Boundary mode operation provides a small n
Minimum Load <0.5% (Typ) of Full Output
magnetic solution with excel ent load regulation. Low n
VOUT Set with a Single External Resistor
ripple Burst Mode operation maintains high efficiency at n No Transformer Third Winding or Opto-Isolator light load while minimizing the output voltage ripple. A Required for Regulation 1.2A, 65V DMOS power switch is integrated along with n Accurate EN/UVLO Threshold and Hysteresis all high voltage circuitry and control logic into a 5-lead n Internal Compensation and Soft-Start ThinSOT™ package. n Output Short-Circuit Protection The LT8301 operates from an input voltage range of 2.7V n 5-Lead TSOT-23 Package to 42V and can deliver up to 6W of isolated output power. n AEC-Q100 Qualified for Automotive Applications The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low
APPLICATIONS
component count, and high efficiency application solution n Isolated Telecom, Automotive, Industrial, Medical for isolated power delivery. Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 5438499, 7463497, and 7471522. n Isolated Auxiliary/Housekeeping Power Supplies
TYPICAL APPLICATION Efficiency vs Load Current 2.7V to 36VIN/5VOUT Micropower Isolated Flyback Converter
90 V + 85 IN VOUT 3:1 2.7V TO 36V 5V 10µF 6mA TO 0.40A (V • IN = 5V) 80 40µH 4.4µH 6mA TO 0.70A (V V IN = 12V) IN 100µF 6mA TO 1.00A (VIN = 24V) • 6mA TO 1.15A (V EN/UVLO SW IN = 36V) 75 LT8301 V – OUT 154k 8301 TA01a EFFICIENCY (%) 70 RFB V GND IN = 5V 65 VIN = 12V VIN = 24V VIN = 36V 60 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) 8301 TA01b Rev. B Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts