mc33981bpna/r2 Freescale Semiconductor, Inc, mc33981bpna/r2 Datasheet - Page 12

• Manufacturer Part Number: mc33981bpna/r2
• Description: Single High-side Switch 4.0 M , Pwm Clock Up To 60khz
• Manufacturer: Freescale Semiconductor, Inc

4.0 mΩ R
electromechanical relays, fuses, and discrete devices in
power management applications. The 33981 can be
controlled by pulse-width modulation (PWM) with a frequency
up to 60 kHz. It is designed for harsh environments, and it
includes self-recovery features.
OUTPUT CURRENT MONITORING (CSNS)
side OUT current and is used externally to generate a
ground-referenced voltage for the microcontroller (MCU) to
monitor OUT current.
TEMPERATURE FEEDBACK (TEMP)
temperature of the GND flag (pin 13). It is used by the MCU
to monitor board temperature.
ENABLE [ACTIVE HIGH] (EN)
sleep mode. This pin has an active passive internal pulldown.
INPUT HIGH SIDE (INHS)
has an active internal pulldown current source and requires
CMOS logic levels.
FAULT STATUS (FS)
external pullup resistor to V
When a device fault condition is detected, this pin is active
LOW.
INPUT LOW SIDE (INLS)
side N-channel MOSFET and has an active internal pulldown
current source and requires CMOS logic levels. It can be
controlled independently of the INHS depending of CONF
pin.
CONFIGURATION INPUT (CONF)
between the internal high-side N-channel MOSFET and the
external low-side N-channel MOSFET. The pin has an active
internal pullup current source. When CONF is at 0 V, the two
12
33981
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 33981 is a high-frequency self-protected silicon
This pin is used to output a current proportional to the high-
This pin reports an analog value proportional to the
This is an input used to place the device in a low current
The input pin is used to directly control the OUT. This input
This pin is an open drain-configured output requiring an
This input pin is used to directly control an external low-
This input pin is used to manage the cross-conduction
DS(ON)
high-side switch used to replace
DD
(5.0 V) for fault reporting.
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTIONS
INTRODUCTION
well as motors and all types of resistive and inductive loads.
A dedicated parallel input is available for an external low-side
control with protection features and cross-conduction
management.
MOSFETs are controlled independently. When CONF is at
V
LOW-SIDE OVERLOAD (OCLS)
side MOSFET. This pin has an active internal pullup current
source. It must be connected to an external resistor.
DRAIN LOW SIDE (DLS)
MOSFET. Its monitoring allows protection features: low side
short protection and V
LOW-SIDE GATE (GLS)
low-side N-channel MOSFET.
SLEW RATE CONTROL (SR)
used to control the output slew rate.
BOOTSTRAP CAPACITOR (CBOOT)
to switch the OUT in PWM mode.
GROUND (GND)
the device.
POSITIVE POWER SUPPLY (VPWR)
source input of operational power for the device. The V
pin is a backside surface mount tab of the package.
OUTPUT (OUT)
must be connected in parallel for operation.
DD
The 33981 is suitable for loads with high inrush current, as
This pin sets the V
This pin is the drain of the external low-side N-channel
This pin is an output used to drive the gate of the external
A capacitor connected between this pin and ground is
A capacitor connected between this pin and OUT is used
This pin is the ground for the logic and analog circuitry of
This pin connects to the positive power supply and is the
Protected high-side power output to the load. Output pins
5.0 V, the two MOSFETs cannot be on at the same time.
DS
PWR
Analog Integrated Circuit Device Data
protection level of the external low-
short protection.
Freescale Semiconductor
PWR