LM3822 National Semiconductor, LM3822 Datasheet - Page 7

• Manufacturer Part Number: LM3822
• Description: Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output
• Manufacturer: National Semiconductor

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 3. High Voltage Operation — V
resistor. (Continued)
where D
Please refer to the Product Operation section for more information.
FIGURE 2. Paralleling LM3822 for Higher Load Current
1
is the duty cycle of PWM1 and D
I
TOTAL
(PWM output is referred to Pin 6)
In the application circuits, the 0.1 µF ceramic capacitor between pins 1 and 2
= 2.2(D
1
−0.5)I
MAX
7
IN
Greater Than 5.5V (High Side Sense)
+ 2.2(D
2
is the duty cycle of PWM2.
2
−0.5)I
MAX
DS101249-8
DS101249-7
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