ZXSC310 查看數據表（PDF） - Diodes Incorporated.

零件编号

产品描述 (功能)

生产厂家

ZXSC310

LED DRIVER SOLUTION FOR LCD BACKLIGHTING

Diodes Incorporated. 

ZXSC310

Output Power Calculation

By making the above assumptions for inductance and

peak current the output power can be determined by:

POUT = (VOUT − VIN) × IAV ×

TOFF

TON + TOFF

Note:VOUT=output voltage + Schottky rectifier voltage

drop.

Where

Capacitor selection

For pulsed operation, as in the maximum battery life

solution, no capacitors are required at the output to the

LED. For rectified operation, as in the maximum

brightness solution, a small value ceramic capacitor is

required, typically 2.2uF.

Generally an input capacitor is not required, but a small

ceramic capacitor may be added to aid EMC, typically

470nF to 1uF.

(notes)

TOFF ≅1.7us (internally set by ZXSC310)

and

( ) TON = TOFF VOUT − VIN

VIN

and

IAV = IPK + IMIN

2

Where

( ) IMIN = IPK − VOUT − VIN × TOFF

L

Operating frequency can be derived by:

1

( ) F =

TON + TOFF

ISSUE 3 - SEPTEMBER 2007

11

SEMICONDUCTORS

Share Link: