LM3524DN National Semiconductor, LM3524DN Datasheet - Page 18

• Manufacturer Part Number: LM3524DN
• Description: ENHANCED PWM CONTROLLER, 3524, DIP
• Manufacturer: National Semiconductor

Specifications of LM3524DN

• Frequency: 350kHz
• Power Dissipation Pd: 1W
• Digital Ic Case Style: DIP
• No. Of Pins: 16
• Operating Temperature Range: 0°C To +125°C
• Svhc: No SVHC (15-Dec-2010)
• Operating Temperature Max: 125°C
• Base Number: 3524
• Controller Type: PWM
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Typical Applications
This equation shows that the input, or inductor, current is
larger than the output current by the factor (1 + t
Since this factor is the same as the relation between V
V
So far it is assumed η = 100%, where the actual efficiency or
η
Q1 and forward on voltage of D1. The internal power loss
due to these voltages is the average I
through either V
loss becomes I
MAX
IN
, I
IN(DC)
will be somewhat less due to the saturation voltage of
can also be expressed as:
IN(DC)
SAT
or V
(1V). η
D1
. For V
MAX
is then:
SAT
(Continued)
L
= V
current flowing, or I
D1
= 1V this power
ON
/t
o
OFF
and
IN
).
,
18
This equation assumes only DC losses, however η
further decreased because of the switching time of Q1 and
D1.
MAX
is