MC33286 Datasheet, PDF (4/8 Pages) Motorola, Inc – Automotive Dual

Freescale Semiconductor, Inc.
MC33286
PIN FUNCTION DESCRIPTION
Pin No.
1, 2, 5, 6, 15, 16, 19, 20
Name/Function
V_bat
Supply Voltage
3, 4, 18, 17
8, 13
9, 12
10
11
OUT1
OUTPUT Channel 1
OUT 2
OUTPUT Channel 2
IN 1
INPUT Channel 1
IN 2
INPUT Channel 2
St1
Status for Channel 1
St2
Status for Channel 2
V_batc
VBAT Control
GND
GROUND
Description
These are the power supply pins of the device. These pins are
directly connected with the lead frame of the package and are tied to
the drain of the switching MOSFET. These pins can be directly
connected to the battery voltage. In addition to their supply functions,
these pins participate to the thermal behaviour of the device in
conducting the heat from the switching MOSFET to the printed circuit
board.
Pins 3 and 4 are the output 1 terminals. Pins 17 and 18 are the output 2
terminals. They are directly connected to the source of the power
MOSFET. The Rdson is 35mΩ max per output at 25°C. Its value
increases up to 50mΩ at 150°C junction temperature.
These are the device input pins, which directly control their
associated output. The thresholds are CMOS compatible. When the
input is in low state, the associated output MOSFET is off. When
input is high, the MOSFET is turned on and the load is activated.
When both inputs are low, the device is in standby mode and its
supply current is less than 1mA for V_bat up to 12V.
These pins are the channel 1 and 2 status. Their internal structure is
an open drain with an internal clamp at 6V. An external pull up
connected to the 5V is needed. When the device is in normal
condition the status is high. If open load or overtemperature occurs
on one channel, the associated output status will be pulled low. See
Functional Truth Table.
This pin is the supply voltage pin for the control portion of the device. It
has to be connected to the V_bat line and to the other V_bat pins listed above.
An internal 45V zener diode is connected between pin 10 and Gnd.
This is the Gnd pin of the device.
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