MIC5014BN Micrel Inc, MIC5014BN Datasheet - Page 8

• Manufacturer Part Number: MIC5014BN
• Description: IC DRIVER MOSFET HI/LO SIDE 8DIP
• Manufacturer: Micrel Inc

Specifications of MIC5014BN

• Mounting Type: Through Hole
• Configuration: High or Low Side
• Input Type: Non-Inverting
• Delay Time: 2.5ms
• Number Of Configurations: 1
• Number Of Outputs: 1
• Voltage - Supply: 2.75 V ~ 30 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Device Type: MOSFET
• Driver Case Style: DIP
• No. Of Pins: 8
• Rise Time: 2.5ms
• High Side Mosfet Drive Type: On-Chip Charge Pump
• Load Voltage Max: 30V
• Supply Voltage Min: 2.75V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Peak: -
• High Side Voltage - Max (bootstrap): -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant

MIC5014/5015
nation of an MIC5014/5015 and a power FET makes an
effective driver for a standard incandescent or halogen lamp
load. Such loads often have high inrush currents, as the
resistance of a cold filament is less than one-tenth as much as
when it is hot. Power MOSFETs are well suited to this
application as they have wider safe operating areas than do
power bipolar transistors. It is important to check the SOA
curve on the data sheet of the power FET to be used against
the estimated or measured inrush current of the lamp in
question prior to prototyping to prevent “explosive” results.
If overcurrent sense is to be used, first measure the duration
of the inrush, then use the topology of Figure 5 with the RC of
the timer chosen to accomodate the duration with suitable
guardbanding.
Relay Driver (Figure 9) Some power relay applications re-
quire the use of a separate switch or drive control, such as in
the case of microprocessor control of banks of relays where
a logic level control signal is used, or for drive of relays with
high power requirements. The combination of an MIC5014/
5015 and a power FET also provides an elegant solution to
power relay drive.
MIC5014/5015
Incandescent/Halogen Lamp Driver (Figure 8) The combi-
OFF
ON
Control Input
OFF
ON
10µF
Control Input
10µF
Figure 8. Halogen Lamp Driver
Figure 9: Relay Driver
1
2
3
4
V+
Input
Source
Gnd
1
2
3
4
V+
Input
Source
Gnd
MIC5014
MIC5014
Gate
NC
NC
NC
Gate
NC
NC
NC
HLX64623
8
7
6
5
OSRAM
8
7
6
5
12V
IRF540
12V
IRF540
Guardian Electric
1725-1C-12D
8
Motor Driver With Stall Shutdown (Figure 10) Tachometer
feedback can be used to shut down a motor driver circuit when
a stall condition occurs. The control switch is a 3-way type; the
“START” position is momentary and forces the driver ON.
When released, the switch returns to the “RUN” position, and
the tachometer’s output is used to hold the MIC5014 input ON.
If the motor slows down, the tach output is reduced, and the
MIC5014 switches OFF. Resistor “R” sets the shutdown
threshold.
Simple DC-DC Converter (Figure 11) The simplest applica-
tion for the MIC5014 is as a basic one-chip DC-DC converter.
As the output (Gate) pin has a relatively high impedance, the
output voltage shown will vary significantly with applied load.
10µF
R
330kΩ
Figure 10. Motor Stall Shutdowm
1N4148
Figure 11. DC - DC Converter
330kΩ
5V
1
2
3
4
V+
Input
Source
Gnd
1
2
3
4
MIC5014
V+
Input
Source
Gnd
MIC5014
T
Gate
NC
NC
NC
Gate
NC
NC
NC
8
7
6
5
10µF
8
7
6
5
V
OUT
12V
= 12V
M
IRFZ44
Micrel, Inc.
June 2005