SS

COMP

16-Pin SOIC

FB

NI

SYNC

V−

SD

V+

NC

SD

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Top View

Si9117

Vishay Siliconix

www.vishay.com

6

Document Number: 70027

S-40750—Rev. E, 19-Apr-04

PIN CONFIGURATION AND ORDERING INFORMATION

ORDERING INFORMATION

Part Number

Temperature Range

Package

Si9117DY

Si9117DY-T1

−40 to 85_C

SOIC-16

Si9117DY-T1—E3

PIN DESCRIPTION

Pin Number

Symbol

Description

1

SS

Generates a 20-mA current source. IC turns or when capacitor is charged to 4.6 V.

2

section.

3

along with equations 1 and 2 in the Oscillator section of the Description of Operations.

4

SYNC

Synchronization input overrides the oscillator. Slave mode operations is possible, as is operation of the converter

at duty cycles >50%. See Oscillator section of the Description of Operations.

5

V−

Ground or negative mode of input power supply.

6

Vcc

Bootstrap power supply pin

7

Current-mode sense input

8

S

Switch FET source.

9

D

Switch FET drain.

10

NC

No connect: for test purposes only. (Normally left open)

11

V+

High voltage (up to 200 V) power supply input.

12

SD

Shutdown. Logic low shuts down the controller.

13

Output of the 4-V reference sources 5 mA.

14

NI

Non-inverting input of the error amplifier. A resistor divider from the reference can be used to set this voltage.

15

FB

Inverting input to the error amplifier; used to maintain output regulation.

16

Comp

Output of the error amplifier. Used to provide compensation for the converter’s feedback control loop.