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PM8841
Single channel low-side gate driver
October 2014 DocID027119 Rev 1 1/13
PM88411 A low-side gate driver
Datasheet - production data
Features Low-side MOSFET driver 1 A sink and 0.8 A source capability External reference for input threshold Wide supply voltage range (10 V ÷ 18 V) Input and output pull-down resistors Short propagation delays Input and output UVLO Wide operating temperature range:
-40 °C to 125 °C SOT23-5 package
Applications SMPS Digital lighting Wireless battery chargers Digitally controlled MOSFETs
DescriptionThe PM8841 is a high frequency single channel
low-side MOSFET driver specifically designed to
work with digital power conversion
microcontrollers, such as the STMicroelectronics
STLUX™ family of products.
The PM8841 output can sink 1 A and source
0.8 A.
The input levels of the driver are derived by the
voltage present at the IN_TH pin (between 2 V
and 5.5 V). This pin is typically connected at the
same voltage of the microcontroller supply
voltage.
The PM8841 device includes both input and
output pull-down resistors.
UVLO circuitry for input and output stages is
present preventing the IC from driving the
external MOSFET in unsafe condition.
Table 1. Device summary
Block diagram PM88412/13 DocID027119 Rev 1
1 Block diagram
Figure 1. PM8841D block diagram
DocID027119 Rev 1 3/13
PM8841 Pin connection
2 Pin connection
Figure 2. Pin connection Table 2. Pin description
Maximum ratings PM8841
4/13 DocID027119 Rev 1
3 Maximum ratings
Table 3. Thermal data
Table 4. Absolute maximum ratings
DocID027119 Rev 1 5/13
PM8841 Electrical characteristics
4 Electrical characteristics
(VCC = 12 V, VIN_TH = 3.3 V, TJ = - 40 ÷ 125 °C, unless otherwise specified)
Table 5. Electrical characteristics Not tested in production. Overlapping prevent by hysteresis VIN_Hyst.
Electrical characteristics PM8841
6/13 DocID027119 Rev 1
Figure 3. Timings
DocID027119 Rev 1 7/13
PM8841 Typical applications
5 Typical applications
Figure 7. Test circuit
Figure 8. Digitally controlled PFC boost converter
