AN-087E Rev.1.0

April-2011

4

FA5526/5527/5528/5536/5537/5538

Fuji Electric Co., Ltd.

http://www.fujielectric.co.jp/products/semiconductor/

1. Outline

FA5526/27/28/36/37/38 series are current-mode switching power control ICs that can directly drive power MOSFETs.

Low-power dissipation is achieved due to adoption of high break-down voltage CMOS process. In addition, stand-by power

consumption can substantially be reduced due to a built-in start-up circuit. Many functions are incorporated in an eight pin

package, reducing the number of external parts and allowing compact and high cost performance power supply

2. Features

▪ Built-in start-up circuit of 500V break-down voltage that is cut off after start-up (input current after cutoff: 25µA (typ.))

▪ Low power dissipation due to adoption of high break-down voltage CMOS process

Supply Current in Operating Mode : 1.4mA (typ.)

( for FA5528 and FA5538 )

▪ Built-in frequency-decreasing function at light load

▪ Oscillating frequency

FA5526/5536 : 130kHz(typ.), FA5527/5537 : 100kHz(typ.), FA5528/5538 : 60kHz(typ.)

▪ Built-in latch-mode cutoff function of overload ( over current ) for FA5526/5527/5528

▪ Built-in Auto-Recovery cutoff function of overload ( over current ) for FA5536/5537/5538

▪ Built-in latch-mode cutoff function of over-voltage for 28V(typ.) at VCC pin for FA5526/5527/5528.

▪ Built-in Auto-Recovery-mode cutoff function of over-voltage for 28V(typ.) at VCC pin for FA5536/5537/5538.

▪ Built-in Under Voltage Lock-Out for VCC pin (15V : ON, 9V : OFF)

▪ 8 pins package(DIP / SO)

3. External dimension diagram

Unit：mm

SO-8

（FA5526N/27N/28N/36N/37N/38N）

DIP-8

（FA5526P/27P/28P/36P/37P/38P）

0.40±0.1

0°

-8

°

1.27

0.20

4.9±0.1

1

4

5

8

4

5

0.25+

0.1/-0.0

5

7.6

1.5±0.3

8

1

1.0±0.3

0.5±0.1

0-15

°

2.54

9.4

2.54×3=7.62