LP3944 Datasheet, PDF (11/12 Pages) National Semiconductor (TI) – RGB/White/Blue 8-LED Fun Light Driver

Application Notes (Continued)
REDUCING I_Q WHEN LEDS ARE OFF
In many applications, the LEDs and the LP3944 share the
same V_DD, as shown in Section Typical Application Circuit.
When the LEDs are off, the LED pins are at a lower potential
than V_DD, causing extra supply current (∆I_Q). To minimize
this current, consider keeping the LED pins at a voltage
equal to or greater than V_DD.
FIGURE 9. Methods to Reduce I_Q When LEDs Are Off
Application Circuit
20085314
20085315
11
www.national.com