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BTS 724G
Smart High-Side Power Switch
Four Channels: 4 x 90mΩ
Status Feedback
Product Summary Package
Operating Voltage V
bb
40V
P-DSO-20
Active channels one four parallel
On-state Resistance R
ON
90mΩ 22.5mΩ
Nominal load current I
L(NOM)
3.3A 7.3A
Current limitation I
L(SCr)
12A 12A
General Description
•
•
N channel vertical power MOSFET with charge pump, ground referenced CMOS compatible input and
diagnostic feedback, monolithically integrated in Smart SIPMOS
technology.
Providing embedded protective functions
Applications
•
•
•
•
µC compatible high-side power switch with diagnostic feedback for 12V and 24V grounded loads
All types of resistive, inductive and capacitve loads
Most suitable for loads with high inrush currents, so as lamps
Replaces electromechanical relays, fuses and discrete circuits
Basic Functions
•
•
•
•
•
•
•
Very low standby current
CMOS compatible input
Improved electromagnetic compatibility (EMC)
Fast demagnetization of inductive loads
Stable behaviour at undervoltage
Wide operating voltage range
Logic ground independent from load ground
Protection Functions Block Diagram
• Short circuit protection
• Overload protection
• Current limitation
• Thermal shutdown
• Overvoltage protection (including load dump) with external
resistor
• Reverse battery protection with external resistor
• Loss of ground and loss of V
bb
protection
• Electrostatic discharge protection (ESD)
Vbb
IN1
ST1/2
IN2
Logic
Channel 1
Channel 2Load 1
Load 2
Diagnostic Function
•
•
•
Diagnostic feedback with open drain output
Open load detection in OFF-state
Feedback of thermal shutdown in ON-state
IN3
ST3/4
IN4
Logic
Channel 3
Channel 4
Load 3
GND
Load 4
Infineon Technologies AG 1 of 14 2003-Oct-01
BTS 724G
Functional diagram
overvoltage
protection
internal
voltage supply
IN1
logic
gate
control
+
charge
pump
current limit
VBB
clamp for
inductive load
OUT1
ESD
temperature
sensor
Open load
detection
reverse
battery
protection
LOAD
.
ST1/2
channel 1
IN2
GND1/2
control and protection circuit
of
channel 2
OUT2
IN3
control and protection circuit
of
channel 3
OUT3
ST3/4
IN4
GND3/4
control and protection circuit
of
channel 4
OUT4
Infineon Technologies AG 2 of 14 2003-Oct-01
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