U6803B-MFPY Atmel, U6803B-MFPY Datasheet - Page 3

• Manufacturer Part Number: U6803B-MFPY
• Description: MOSFET & Power Driver ICs 3x25mA Triple Driver w/thermal mon.
• Manufacturer: Atmel
• Type: Triple Driver ICr

Specifications of U6803B-MFPY

• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4. Functional Description
4.1
4.2
4.3
4.4
Figure 4-1.
4762B–AUTO–09/05
General
Current Limitation of the Output Stages and Overtemperature Shutdown
Transients and Load Dump
Low-voltage Detection
Application Schematic
ON state: A low level at the input stage activates the corresponding output stage.
OFF state: The internal pull-up resistor provides a high level to the input comparator and deacti-
vates the output stage.
7V Zener diodes between each input pin and GND are capable of ±10 mA clamping currents
without crosstalk on adjacent input stages.
A total clamping current of ±30 mA should be observed with respect to the power dissipation.
A temperature-dependent current limitation in the range of 25 mA to 100 mA protects the stages
in case of a short. Additionally, the chip temperature is monitored. For T
are disabled and automatically enabled with a hysteresis of T
An integrated 28V Zener diode protects each output stage against transients and load-dump
(Schaffner pulses). With the help of an external 1 k resistor, the output transistor is capable of
handling the corresponding current which flows during each of these conditions. Apart from that,
the outputs are short-circuit and overload protected.
When the supply voltage is switched on, a power-on reset pulse is generated internally which
disables all output stages until a defined supply-voltage level is reached. The low-voltage detec-
tion is provided with a hysteresis of V
controller
Micro-
V
V
V
I1
I2
I3
100 nF
U6803B
V
S
= 5 V
hyst
V
V
V
= 0.5V typically.
O1
O2
O3
C
R
C
R
V
Batt
C
Load
R
3
3
Chip
470 pF
1 k
> 5°C.
Chip
> 148°C, all outputs
U6803B
3