Datasheet LT3001 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 36V 4W No-Opto Isolated Flyback Converter |
| 页数 / 页 | 10 / 1 — FEATURES. DESCRIPTION. 4V to 36V Input Voltage Range. 1.2A, 65V Internal … |
| 文件格式/大小 | PDF / 626 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. 4V to 36V Input Voltage Range. 1.2A, 65V Internal DMOS Power Switch. Low Quiescent Current
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LT3001 36V 4W No-Opto Isolated Flyback Converter
FEATURES DESCRIPTION
n
4V to 36V Input Voltage Range
The LT®3001 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
Boundary Mode Operation at Heavy Load
winding or opto-isolator for regulation. The output voltage n
Low-Ripple Burst Mode® Operation at Light Load
is programmed with a single external resistor. Internal n
Minimum Load <0.5% (Typ) of Full Output
compensation and soft-start further reduce external com- n
VOUT Set with a Single External Resistor
ponent count. Boundary mode operation provides a small n No Transformer Third Winding or Opto-Isolator magnetic solution with excel ent load regulation. Low Required for Regulation ripple Burst Mode operation maintains high efficiency at n Accurate EN/UVLO Threshold and Hysteresis light load while minimizing the output voltage ripple. A n Internal Compensation and Soft-Start 1.2A, 65V DMOS power switch is integrated along with n Output Short-Circuit Protection all high voltage circuitry and control logic into a 5-lead n 5-Lead TSOT-23 Package ThinSOT™ package. The LT3001 operates from an input voltage range of 4V to 36V and can deliver up to 4W of isolated output power.
APPLICATIONS
The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low n Isolated Telecom, Automotive, Industrial, Medical component count, and high efficiency application solution Power Supplies for isolated power delivery. n Isolated Auxiliary/Housekeeping Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 5438499, 7463497, and 7471522.
TYPICAL APPLICATION Efficiency vs Load Current 4V to 36VIN/5VOUT Micropower Isolated Flyback Converter
90 V + 85 IN VOUT 3:1 4V 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 LT3001 V – OUT 154k EFFICIENCY (%) 70 RFB VIN = 5V GND 65 VIN = 12V 3001 TA01a VIN = 24V VIN = 36V 60 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) 3001 TA01b Rev. 0 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 Operation Applications Information Package Description
FEATURES DESCRIPTION
n
4V to 36V Input Voltage Range
The LT®3001 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
Boundary Mode Operation at Heavy Load
winding or opto-isolator for regulation. The output voltage n
Low-Ripple Burst Mode® Operation at Light Load
is programmed with a single external resistor. Internal n
Minimum Load <0.5% (Typ) of Full Output
compensation and soft-start further reduce external com- n
VOUT Set with a Single External Resistor
ponent count. Boundary mode operation provides a small n No Transformer Third Winding or Opto-Isolator magnetic solution with excel ent load regulation. Low Required for Regulation ripple Burst Mode operation maintains high efficiency at n Accurate EN/UVLO Threshold and Hysteresis light load while minimizing the output voltage ripple. A n Internal Compensation and Soft-Start 1.2A, 65V DMOS power switch is integrated along with n Output Short-Circuit Protection all high voltage circuitry and control logic into a 5-lead n 5-Lead TSOT-23 Package ThinSOT™ package. The LT3001 operates from an input voltage range of 4V to 36V and can deliver up to 4W of isolated output power.
APPLICATIONS
The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low n Isolated Telecom, Automotive, Industrial, Medical component count, and high efficiency application solution Power Supplies for isolated power delivery. n Isolated Auxiliary/Housekeeping Power Supplies All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 5438499, 7463497, and 7471522.
TYPICAL APPLICATION Efficiency vs Load Current 4V to 36VIN/5VOUT Micropower Isolated Flyback Converter
90 V + 85 IN VOUT 3:1 4V 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 LT3001 V – OUT 154k EFFICIENCY (%) 70 RFB VIN = 5V GND 65 VIN = 12V 3001 TA01a VIN = 24V VIN = 36V 60 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) 3001 TA01b Rev. 0 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 Operation Applications Information Package Description