LPD6803 View Datasheet(PDF) - Unspecified

Part Name

Description

MFG CO.

LPD6803

3 channel constant-current driver and grey-level modulate output

Unspecified 

LPD6803 datasheet

This mode (OMODE=high level or dangle) application is same as above , only add a RX

at FBX polar which regulate current, this LED current is decided by RX: ILED≈0.7V/RX

Chart1: Iled –Rx curve

Pls note that only can keep constant current when voltage to the grand VOUT is at the

range of 1.1---6v. that is meet:

VLED+6V+ILED*RL≧VDD≧VLED+1.1V+ILED*RL

Circuit value must notice that power consumption PD won’t exceed its maxim

value PDMAX.

PD=ILED1*(Vout1-0.7V)+ILED2*(Vout2-0.7V)+ILED3*(Vout3-0.7V)+PIC

Here ILED1/ILED2/ILED3 is respectively current which passed each LED light, and

Vout1/Vout2/Vout3 is respectively each output voltage to the grand .

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