
MC34844
FUNCTIONAL DEVICE OPERATION
TYPICAL PERFORMANCE CURVES (TA=25°C)
50.0
45.0
40.0
35.0
30.0
25.0
20.0
25.03 mA
37.59 mA
50.01 mA
15.0
10.0
5.0
0.0
0.14 mA
12.46 mA
FPWM=25KHz
0.4%
25.0%
50.0%
75.0%
99.6%
PWM Duty Cycle (%)
Figure 11. PWM Dimming Linearity
10.10
10.08
10.06
10.04
10.02
10.00
9.98
9.96
9.94
9.92
I2C Mode
SM_Bus Mode
Manual Mode
9.90
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Vin, volts
Figure 12. Bias Current vs Input Voltage (Operational Mode)
34844
Analog Integrated Circuit Device Data
Freescale Semiconductor
26