LM3812M-1.0 National Semiconductor, LM3812M-1.0 Datasheet - Page 8

• Manufacturer Part Number: LM3812M-1.0
• Description: Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
• Manufacturer: National Semiconductor

www.national.com
Typical Application Circuits
is used for bypassing, and the 0.1 µF ceramic capacitor between pins 3 and 4 is used for filtering. Shutdown (SD) is tied to
V
DD
through a 10 k
FIGURE 4. High Voltage Operation — V
resistor. (Continued)
where D
Please refer to the Product Operation section for more information.
FIGURE 3. Paralleling LM3812 for Higher Load Current
1
is the duty cycle of PWM1 and D
I
TOTAL
(PWM output is referred to Pin 7)
In the application circuits, the 0.1 µF ceramic capacitor between pins 1 and 8
= 2.2(D
1
−0.5)I
MAX
8
IN
Greater Than 5.25V (High Side Sense)
+ 2.2(D
2
is the duty cycle of PWM2.
2
−0.5)I
MAX
DS100122-8
DS100122-7