APW7008(2009_06) Ver la hoja de datos (PDF) - Anpec Electronics

Número de pieza

componentes Descripción

Lista de partido

APW7008
(Rev.:2009_06)

1X/1.5X/2x Charge Pump White LED Driver

Anpec Electronics 

APW7008

Function Description (Cont.)

LED Current Setting (Cont.)

400

350

300

250

200

150

100

50

0

0

5

10 15 20 25

30

ILED (mA)

Figure 1. RSET Value vs. LED Current

Shutdown/Enable

Pull the EN above 1.3V to enable the device and pull EN

pin below 0.3V to disable the device. In shutdown mode,

all internal control circuits are turned off and the qui-

escent current is below 2µA. When the device exits shut-

down mode, the output has soft-start function as the in-

put voltage startup.

Over-Voltage Protection

If any of LEDs is failed or unused LED channel is not

connected to VOUT, the charge pump mode will go into

2x mode and the output voltage will be pumped to 2

times the input voltage. If the output voltage is over

5.5V, the over-voltage protection circuit will limit the out-

put voltage to approximately 5.5V.

Copyright © ANPEC Electronics Corp.

14

Rev. A.4 - Jun., 2009

www.anpec.com.tw

Share Link: