LT8312_15 Datasheet, PDF (1/14 Pages) Linear Technology – Boost Controller with Power Factor Correction

LT8312
Boost Controller with
Power Factor Correction
Features
nn _{PFC Boost with Minimum Number of External Com-}
ponents
nn _{VIN and VOUT Limited Only by External Components}
nn _{Active Power Factor Correction}
nn _{Low Harmonic Distortion}
nn _{Overvoltage Protection}
nn _{Energy Star Compliant (<0.5W No-Load Operation)}
nn _{16-Lead MSOP Package}
Applications
nn _Industrial
nn _Aviation
Description
The LT^®8312 is a power factor correction (PFC) boost
controller. A LT8312-based design can achieve a power
factor of greater than 0.99 by actively modulating the input
current, allowing compliance with most Harmonic Current
Emission requirements.
The LT8312 is well suited for a wide variety of off-line
applications. The input range can be scaled up or down,
depending mainly on the choice of external components.
Efficiencies higher than 95% can be achieved with output
power levels up to 250W.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
90V
TO 265V
AC
Universal Input 200W PFC Boost Converter
B1
GBU404
0.1µF 499k 100k
499k 100k
D3
D2 _20Ω
10µF
• ^4:1
•
4.7pF
2k
1M
95.3k
V_IN
V_{IN_SENSE}
EN/UVLO
DCM
FB
LT8312
20Ω
GATE
D4
CMR5H-06
V_OUT
400V
560µF ^0.5A
×2
99
1M
98
1M
97
96
9.53k
95
94
V_REF
SENSE
93
100k
INTV_CC
4.7µF
0.01Ω
92
OVP
V_C
GND
91
221k
0
2.2µF
8312 TA01a
Efficiency
115VAC
230VAC 50Hz
20 40 60 80 100 120 140 160
POWER (W)
8312 G01
8312f
For more information www.linear.com/LT8312
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