LM3916MWC National Semiconductor Corporation, LM3916MWC Datasheet - Page 14

• Manufacturer Part Number: LM3916MWC
• Description: Dot/bar Display Driver
• Manufacturer: National Semiconductor Corporation

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Application Hints
5 mA
V
1.25V
1.5 mA
Optional circuit for improved intensity matching at low currents. See text.
Other Applications
For increased resolution, it’s possible to obtain a display with
a smooth transition between LEDs. This is accomplished by
superimposing an AC waveform on top of the input level as
REF
= 5V
I
LED
V
I
REF
LED
FIGURE 12. Independent Adjustment of Reference Voltage and LED Intensity for Multiple Drivers
28 mA
FIGURE 13. Wide-Range Adjustment of Reference Voltage and LED intensity for Multiple Drivers
10V
25 mA
(Continued)
14
shown in Figure 14 . The signal can be a triangle, sawtooth or
sine wave from 60 Hz to 1 kHz. The display can be run in ei-
ther dot or bar mode.
DS007971-19
DS007971-20