LMD18400N/NOPB National Semiconductor, LMD18400N/NOPB Datasheet - Page 8

• Manufacturer Part Number: LMD18400N/NOPB
• Description: IC DRIVER QUAD HI SIDE 20-DIP
• Manufacturer: National Semiconductor

Specifications of LMD18400N/NOPB

• Configuration: High-Side
• Input Type: Non-Inverting
• Delay Time: 5µs
• Current - Peak: 3A
• Number Of Configurations: 4
• Number Of Outputs: 4
• Voltage - Supply: 7 V ~ 28 V
• Operating Temperature: -25°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Supply Voltage Min: 7V
• Supply Voltage Max: 60V
• No. Of Outputs: 4
• Output Voltage: 5.5V
• Output Current: 3.75A
• Driver Case Style: DIP
• Msl: MSL 1 - Unlimited
• Device Type: High Side
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• High Side Voltage - Max (bootstrap): -
• Other names: *LMD18400N; *LMD18400N/NOPB; LMD18400N

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Enable
(Pin 3)
Truth Table
Applications Information
BASIC OPERATION
High-side drivers are used extensively in automotive and
industrial applications to switch power to ground referred
loads. The major advantage of using high-side drive, as
opposed to low-side drive, is to protect the load from being
energized in the event that the load drive wire is inadvert-
ently shorted to ground as shown in Figure 1. A high-side
driver can sense a shorted condition and open the power
switch to disable the load and eliminate the excessive cur-
rent drain on the power supply. The LMD18400 can control
and protect up to four separate ground referenced loads.
Input
0
1
1
1
1
1
1
1
Chip Select
(Pin 4)
Input
X
X
X
X
X
X
1
0
(Pins 9, 10, 11, 12)
Switch Control
Input
X
X
X
0
1
0
1
1
(Pin 13)
Output
Error
X
X
1
1
1
0
0
0
8
Thermal SD
(Pin 17)
Output
The LMD18400 combines low voltage CMOS logic control
circuitry with a high voltage DMOS process. Each DMOS
power switch has an individual ON/OFF control input. When
commanded ON, the output of the switch will connect the
load to the V
X
X
0
1
1
1
1
0
FIGURE 1. High-Side vs Low-Side Drive
“Sleep” Mode, I
Selected Switch is OFF
Selected Switch is ON, Normal Operation
Switch is OFF but:
Switch is ON, but:
T
Data Output Pin is TRI-STATE
Data Output Pin is Enabled and Ready to
Output Diagnostic Information
CC
J
a. Load is Open Circuited, or
b. Load is Shorted to V
c. T
d. V
a. Load is Shorted to Ground, or
b. Switch is in Power Limit, or
c. T
d. V
>
supply through a maximum resistance of
+170˚C, All Switches are OFF
J
J
CC
CC
>
>
High Side Drive
Low Side Drive
>
>
+145˚C, or
+145˚C, or
+35V
+35V and Switch is Actually OFF
SUPPLY
Conditions
<
CC
10 µA
01102610
, or
01102609