LT8312

1

8312f

Typical applicaTion

FeaTures

DescripTion

Boost Controller with

Power Factor Correction

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.

applicaTions

n

PFC Boost with Minimum Number of External Com-

ponents

n

n

Active Power Factor Correction

n

Low Harmonic Distortion

n

Overvoltage Protection

n

Energy Star Compliant (<0.5W No-Load Operation)

n

16-Lead MSOP Package

n

Industrial

n

Aviation

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.

Efficiency

90V

TO 265V

AC

0.1µF

B1

GBU404

10µF

2.2µF

499k

499k

1M

95.3k

560µF

×2

400V

0.5A

4.7pF

4.7µF

100k

221k

100k

100k

2k

1M

1M

9.53k

0.01

8312 TA01a

D3

D4

CMR5H-06

D2 20

20

4:1

•

•

FB

GATE

EN/UVLO

DCM

LT8312

SENSE

OVP

GND

POWER (W)

0

40

80 100

20

60

120 140 160

8312 G01

91

92

94

93

95

97

96

98

99

115VAC

230VAC 50Hz

Universal Input 200W PFC Boost Converter