點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

-6 -

Version

：A.001

PC112/PC113

Typical performance characteristics (cond.)

5

10

15

20

25

30

0.088

0.09

0.092

0.094

0.096

0.098

0.1

Feedback voltage vs Load current

Load current (mA)

2x LEDs

3x LEDs

4x LEDs

-20

0

20

40

60

80

100

120

420

440

460

480

500

520

540

560

Frequency vs Temperature

Temperature (degree)

NOTE1 :The white LED forward voltage is about 3.6V, so PC112/PC113 could drive up to 6

series white LEDs.

NOTE2 : To chose D1(Schottky diode), it must has fast switch characteristics and low

forward voltage. We recommend the MBR0520in this application.

NOTE3 : The ripple of input voltage could be minimized with C1. Thus, a large value of

capacitor C1 is suggested. With the application of a RC-filter (R1 and C2) to VDD

pin, the stability of circuit is enhanced. The ripple of output voltage also could be

improved with C3. In most designs, the low ESR (equivalent series resistance)

capacitors are desirable, like multi-layer capacitor. A 1uF to 2.2uF output

capacitor is sufficient for most applications.

2

095

.

0

R

(A)