T6818-TUS Atmel, T6818-TUS Datasheet - Page 6

• Manufacturer Part Number: T6818-TUS
• Description: IC DRIVER TRPL HALFBRIDGE 14SOIC
• Manufacturer: Atmel
• Type: Half Bridger

Specifications of T6818-TUS

• Input Type: Serial
• Number Of Outputs: 3
• On-state Resistance: 500 mOhm
• Current - Output / Channel: 1.5A
• Current - Peak Output: 2A
• Voltage - Supply: 7 V ~ 40 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• For Use With: ATAB6818 - BOARD EVAL FOR T6818/ATA6828
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Power-supply Fail
Open-load Detection
Overtemperature
Protection
Short-circuit Protection
Inhibit
6
T6818/T6828
In case of undervoltage at pin VS, the Power-Supply Fail bit (PSF) in the output register
is set and all outputs are disabled. To detect an undervoltage, its duration has to last
longer than the undervoltage detection delay time t
ately when supply voltage recovers normal operation value. The PSF bit stays high until
it is reset by the SRR bit in the input register.
If the current through a high-side or low-side switch in ON-state stays below the open-
load detection threshold, the open-load detection bit (OPL) in the output register is set.
The OPL bit stays high until it is reset by the SRR bit in the input register. To detect an
open load, its duration has to last longer than the open-load detection delay time t
If the junction temperature of one or more output stages exceeds the thermal prewarn-
ing threshold, T
When the temperature falls below the thermal prewarning threshold, T
is reset. The TP bit can be read without transferring a complete 16-bit data word. The
status of TP is available at pin DO with the falling edge of CS. After the microcontroller
has read this information, CS is set high and the data transfer is interrupted without
affecting the status of input and output registers.
If the junction temperature of one or more output stages exceeds the thermal shutdown
threshold, T
register are set to low. The outputs can be enabled again when the temperature falls
below the thermal shutdown threshold, T
set to high. Hysteresis of thermal prewarning and shutdown threshold avoids
oscillations.
The output currents are limited by a current regulator. Overcurrent detection is activated
by writing a high to the OCS bit in the input register. When the current in an output stage
exceeds the overcurrent limitation and shutdown threshold, it is switched off after a
delay time (t
tus bit in the output register is set to low. For OCS = low the overcurrent shutdown is
inactive. The SCD bit is also set if the current exceeds the overcurrent limitation and
shutdown threshold, but the outputs are not affected. By writing a high to the SRR bit in
the input register the SCD bit is reset and the disabled outputs are enabled.
0 V applied to pin 10 (INH) inhibits the T6818/T6828.
All output switches are then turned off and switched to tri-state. The data in the output
register are deleted. The current consumption is reduced to less than 5 µA at pin VS and
less than 25 µA at pin VCC. The output switches can be activated again by switching pin
10 (INH) to 5 V which initiates an internal power-on reset.
j switch off
dSd
). The short-circuit detection bit (SCD) is set and the corresponding sta-
jPW set
, all outputs are disabled and the corresponding bits in the output
, the temperature prewarning bit (TP) in the output register is set.
jswitch on
and the SRR bit in the input register is
dUV
. The outputs are enabled immedi-
jPW reset
4530E–BCD–07/04
, the bit TP
dSd
.