mm5450-5451 Micrel Semiconductor, mm5450-5451 Datasheet - Page 7

• Manufacturer Part Number: mm5450-5451
• Description: Mm5450/5451 Led Display Driver
• Manufacturer: Micrel Semiconductor

Typical Performance Characteristics
Typical Applications
RAW DC
Micrel, Inc.
February 2006
> 9 V
Figure 10. Typical Application of Constant Current
LM317
I 19 =
5k
240
7V
1K
Brightness Control
–
LM324
+
Figure 7.
5V
20
1
MM5450
2N2907
1k
PIN 19
I 19
Figure 9.
7
Figure 11. Brightness Control Varying the Duty Cycle
CD4046
(VCO)
5V
MM74HC123
10 µS
LED
Figure 8.
A
J
Q 19
MM5450
MM5450/5451
[phone]
M9999-021606
20
1