BTS3256D Infineon Technologies, BTS3256D Datasheet - Page 26

• 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

9
Note: The following information is given as a hint for the implementation of the device only and shall not be
9.1
In order to use the digital feedback function of the device, there must be a serial resistor used between the IN pin
and the driver (micro controller).
To calculate this serial resistor on the input pin, three device conditions and of course the driver (micro controller)
abilities need to be taken into account.
Figure 20
Figure 20
Note: This is a very simplified example of an application circuit. The function must be verified in the real application.
Conditions to be meet by the circuitry:
During normal operation V
During fault condition the max. capability of the driver (micro controller) must not be exceeded and the logic low
level at DI must be ensured by a voltage drop over the serial resistor R
Conditions in formulas:
•
•
Datasheet
µC
with
with
This condition is valid during status feedback operation mode
V
with
This condition is valid during normal operation mode
IN
regarded as a description or warranty of a certain functionality, condition or quality of the device.
output current,min
=
µC
µC
µC
µC
output current,min
HIGH,max
HIGH,min
shows the circuit used for reading out the digital status.
HIGH,min
Application Information
Dimensioning of serial Resistor at IN pin
Circuitry to readout fault information
referring to the minimal high output voltage of the
referring to the maximal high output voltage of the
V
V
GND
- (
bb
CC
> µC
R
IN *
referring to the µC maximum output current capability
HIGH,max /
I
IN,max
IN
must be higher than V
V
Microcontroller
) >
CC
R
V
IN
INH,min
> I
GND
INFault_min
DI
DO
V
V
DO
RIN
I
DO
INH,min
V
R
DI
IN
I
26
IN
to switch ON.
GND
IN/Fault
100µA
20µA
V
:
µC
S
µC
driving stage
driving stage
BTS3256
IN
while the device fault current is flowing.
Smart Low Side Power Switch
Fault information
1.0mA
3.0mA
:
SRP
Fault_R1dim.emf
HITFET - BTS 3256D
Application Information
R
Rev. 1.0, 2009-05-05
S RP