APW7008_12 datasheet(14/22 Pages) ANPEC

Part #	APW7008

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

PDF	22 Pages

Scroll/Zoom	100%

Manufacturer	ANPEC [Anpec Electronics Coropration]

Direct Link	http://www.anpec.com.tw

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14 / 22 page

Rev. A.4 - Jun., 2009

APW7008

www.anpec.com.tw

Function Description (Cont.)

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,

LED Current Setting (Cont.)

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.

Figure 1. RSET Value vs. LED Current

100

150

200

250

300

350

400

ILED (mA)

Over-Voltage Protection

all internal control circuits are turned off and the qui-

escent current is below 2

µA. When the device exits shut-

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

put voltage startup.

APW7008 Datasheet(PDF) 14 Page - Anpec Electronics Coropration