BTS3256D Infineon Technologies, BTS3256D Datasheet - Page 23

• 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

8.3
The condition short circuit is an overload condition of the device.
In a short circuit condition, the resulting dI / dt is a function of the short circuit resistance. The BTS3256D
incorporates 2 shut down strategies for maximum robustness in the presence of short circuits:
- immediate shut down in the case of low ohmic shorts by power detection exceeding P
- over temperature shut down in the case of an overload condition
The additional feature of this device is a limitation of the load current to I
If the condition is normalized in a shorter time than t
and tries to restart in case the IN pin is still high.
From first switch off the fault feedback will be activated during t
normal condition is reached.
Figure 18
device to limit the current. The device stays on, because the load current returns to normal condition before t
In the second switch on, the short circuit is permanent and the device switches OFF after maximum limiting time,
stays OFF for the blanking time regardless of the input pin condition and then stays OFF according to the IN pin
low condition.
The definitions of voltages and currents are in respect to
Figure 17
Datasheet
shows the behavior mentioned above. In this example first a shorted load occurs which causes the
Short Circuit Protection
Typical Power limitation behavior I
70
60
50
40
30
20
10
0
Safe operation area
10
Protective Shut Down
DS
V
lim
/ V
Drain
, the device stays on, if not the device switch off for t
23
DS
Figure
[ V ]
14. The behavior of V
restart
20
and continues until the IN pin goes low or
lim
Smart Low Side Power Switch
for a maximum time of t
Power_limitation.emf
DI
HITFET - BTS 3256D
max
also depends on R
Protection Functions
Rev. 1.0, 2009-05-05
30
lim
.
IN
restart
restart
.
.