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LM3815 データシート(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LM3815
部品情報  Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3815 データシート(HTML) 4 Page - National Semiconductor (TI)

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Common Device Parameters (Continued)
Unless otherwise specified, V
DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is
0.1µF.
Symbol
Parameter
Conditions
Typ
(Note 5)
Limit
(Note 6)
Units
V
OH
Logic High Level for PWM
Load current = 1mA, 2V
≤ V
DD
5.25V
V
DD − 0.05
V
DD − 0.2
V
V (min)
V
OL
Logic Low Level for PWM
Sink current = 1mA, 2V
≤ V
DD
5.25V
0.04
V
0.2
V (max)
P
I
Insertion Loss
I
SENSE = 1A (Note 9)
0.004
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The guar-
anteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: At elevated temperatures, devices must be derated based on package thermal resistance. The device in the surface-mount package must be derated at
θJA= 150˚C/W (typically), junction-to-ambient.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin.
Note 4: The absolute maximum peak and continuous currents specified are not tested. These specifications are dependent on the
θJA, which is 150˚C/W for the S08
package.
Note 5: Typical numbers are at 25˚C and represent the most likely parametric norm. Specifications in standard type face are for TJ= 25˚C and those with boldface
type apply over full operating temperature ranges.
Note 6: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Averaging Outgoing Quality Level (AOQL).
Note 7: There is a variation in accuracy over time due to thermal effects. Please refer to the PWM Output and Current Accuracy section for more information.
Note 8: The PWM accuracy for LM3814-7.0 and LM3815-7.0 depends on the amount of copper area under pins 1 and 2, and the layout. Please refer to the ’PWM
Output and Current Accuracy’ section for more information.
Note 9: The tolerance of the internal lead frame resistor is corrected internally. The temperature coefficient of this resistor is 2600 ppm/˚C.
www.national.com
4


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