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

REFERENCE DESIGNS

Three typical LED driving applications are shown.

Firstly a typical LCD backlight circuit, then maximum

brightness LED driving solution and lastly an optimised

battery life LED driving solution.

LCD backlight circuit

VIN = 3.3V / 5V

V CC

VDRIVE

STDN

I SENSE

Gnd

(Notes)

This application shows the ZXSC310 in a typical LCD

backlight application for Digital Still Cameras and

PDA’s. The input voltage for these backlight circuits are

usually fixed from the main system power, typically

3.3V or 5V. The LED’s are connected serially so that the

light is distributed uniformly in each LED. The current

provided to the LED’s can either be pulsed or DC. The

DC current is programmable via a sense resistor,

RSENSE, and is set to an optimum LED current of 20mA

for the reference designs. DC current is achieved by

adding a Schottky rectifying diode and an output

capacitor, as shown in the reference design below.

Materials list

Ref

U1

Q1

D1

C1

R1(6)

R1(7)

L1(8)

Value

N/A

N/A

N/A

2.2␮F

150m⍀

250m⍀

68µH

Part Number

ZXSC310E5

FMMT618

ZHCS1000

Generic

Generic

Generic

Manufacture

Zetex Semiconductors

Zetex Semiconductors

Zetex Semiconductors

Various

Various

Various

(6) Used for 3.3V input, ILED set to 20mA Ϯ10%.

(7) Used for 5V input, ILED to 20mA Ϯ10%.

(8) See Application section.

SEMICONDUCTORS

6

Comments

Single cell converter, SOT23-5

Low VCE(sat) NPN, SOT23

1A Schottky diode, SOT23

0805 Size

1206 Size

1206 Size

Surface mount inductor

ISSUE 3 - SEPTEMBER 2007

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