LM3813MX-7.0 National Semiconductor, LM3813MX-7.0 Datasheet - Page 12
![IC CURRENT GAUGE PREC EVAL 8SOIC](/photos/18/29/182926/8-soic_sml.jpg)
LM3813MX-7.0
Manufacturer Part Number
LM3813MX-7.0
Description
IC CURRENT GAUGE PREC EVAL 8SOIC
Manufacturer
National Semiconductor
Type
Battery Chargerr
Datasheet
1.LM3813MX-7.0.pdf
(14 pages)
Specifications of LM3813MX-7.0
Function
Current Gauge
Sensing Method
Low-Side
Accuracy
±4%
Voltage - Input
2 ~ 5.25 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Output Current
1mA
Operating Supply Voltage (min)
2V
Operating Supply Voltage (max)
2.25V
Operating Temp Range
-40C to 125C
Package Type
SOIC N
Mounting
Surface Mount
Pin Count
8
Operating Temperature Classification
Automotive
For Use With
LM3813EVAL - EVALUATION BOARD FOR LM3813
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Lead Free Status / Rohs Status
Not Compliant
Other names
*LM3813MX-7.0
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3813MX-7.0
Manufacturer:
YAMAHA
Quantity:
101
www.national.com
Look-Up Tables
The following tables show how to convert the duty cycle of
the PWM output to a current value, and vice versa. The
*Maximum Sense Current = 1.0 Amps for LM3812-1.0 and LM3813-1.0.
The sense current should be multiplied by 10 for LM3812-7.0 and LM3813-7.0.
Sense Current
(Amps)*
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
TABLE 1. Current to Duty Cycle Conversion Table
Duty Cycle
95.5
93.2
90.9
88.6
86.4
84.1
81.8
79.5
77.3
75.0
72.7
70.5
68.2
65.9
63.6
61.4
59.1
56.8
54.5
52.3
50.0
(%)
12
quantization error of
Please see the “PWM Output and Current Accuracy” section
for more details.
Sense Current
(Amps)*
-1.00
-0.95
-0.90
-0.85
-0.80
-0.75
-0.70
-0.65
-0.60
-0.55
-0.50
-0.45
-0.40
-0.35
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
-0.00
1
⁄
2
bit is not shown in these tables.
Duty Cycle
13.6
15.9
18.2
20.5
22.7
25.0
27.3
29.5
31.8
34.1
36.4
38.6
40.9
43.2
45.5
47.7
50.0
11.4
(%)
4.5
6.8
9.1