BTS3256D Infineon Technologies, BTS3256D Datasheet - Page 4

• Manufacturer Part Number: BTS3256D
• Description: IC SWITCH SMART LOWSIDE TO252-5
• Manufacturer: Infineon Technologies
• Series: HITFET®r
• Type: Low Sider

Specifications of BTS3256D

• Input Type: Non-Inverting
• Number Of Outputs: 1
• On-state Resistance: 10 mOhm
• Current - Output / Channel: 7.5A
• Current - Peak Output: 42A
• Voltage - Supply: 5.5 V ~ 30 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Digital Diagnostic Features
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Protection Functions
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Application
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Detailed Description
The BTS 3256D is an autorestart single channel low-side power switch in PG-TO-252-5-11 package providing
embedded protective functions. The device is able to switch all kind of resistive, inductive and capacitive loads.
The ESD protection of the V
The BTS 3256D is supplied by the V
supply voltage is monitored by the under voltage lock out circuit. The Gate driving unit allows the device to operate
in the lowest ohmic range independent of the input signal level, 3.3 V or 5 V . For slow PWM application the device
offers smooth turn-on and off due to the embedded edge shaping function, to reduce EMC noise. Furthermore the
SRP pin can be used to customize the slew rate of the device in a wide range.
The Device is designed for driving automotive loads like motors,valves, coils or bulbs in continous or PWM mode.
The over voltage protection is for protection during load-dump or inductive turn off conditions. The power MOSFET
is limiting the Drain-Source voltage to a specified level. This function is available even without any supply.
The over temperature protection prevents the device from overheating due to overload and/or bad cooling
conditions. In order to reduce the device stress the edge shaping is disabled during thermal shutdown. After
thermal shutdown the device stays off for the specified restart delay time to enable a clear feedback readout on
the microcontroller. After this time the device follows the IN signal state.
At high dynamic overload conditions, such as short circuit, the device will either turn off immediately due to the
implemented over power limitation, or limit the current for a specified time and then switch off for the restart delay
time. Shutdown of the device is triggered if the power dissipation during limitation is above the over power
threshold. The short circuit shutdown is a timed restart function. The device will stay off for the specified time and
afterwards follow the IN signal state. In order to reduce the device stress the edge shaping is disabled during
protective turn off.
Datasheet
Over temperature
Over load
Short circuit
Clear detection due to a restart delay time
Enhanced short circuit protection with time and power limited active current limitation
Under voltage lock out
Over temperature with time and temperature controlled auto restart
Over load with power and time controlled auto restart
ESD protection
All types of resistive, inductive and capacitive loads
Suitable for loads with inrush current, such as motors, coils, solenoids or lamps
Suitable for EMC optimized switching in slow operation mode
Suitable for higher speed PWM controlled loads in fast operation mode
Replacement of electromechanical relays, fuses and discrete circuits
Micro controller compatible low side power switch with digital feedback for 12V loads
S
and IN/Fault pin is referenced to GND.
S
Pin. This Pin should be connected to a reverse protected battery line. The
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Smart Low Side Power Switch
HITFET - BTS 3256D
Rev. 1.0, 2009-05-05
Overview