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L9177 Datasheet(PDF) 8 Page - STMicroelectronics

Part # L9177
Description  Peripheral on chip for low end engine control
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9177 Datasheet(HTML) 8 Page - STMicroelectronics

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Block diagram and pin description
L9177
8/49
DocID17617 Rev 1
2.2
Pin description
Figure 2. Pin connection (top view)
Table 2. Pin function
Pin #
Pin name
Description
I/O
type
Class
1
GND
Analog and power ground
GND
PWR
2
OUTB
Output bridge 1
O
PWR
3
OUTA
Output bridge 1
O
PWR
4
VB_1
Battery line to bridge1
I
PWR
5
EN
Logic input to enable stepper motor
I
SIGNAL
6
DIR
Logic input to set stepper motor direction
I
SIGNAL
7
VDD_TRK Tracking voltage regulator output
O
PWR
8
REXT
External resistor for precision current reference
I
SIGNAL
9
HS_OUT
High side switch output
O
PWR
10
VRIN+
VRS positive differential input
I
SIGNAL
11
VRIN-
VRS negative differential input
I
SIGNAL
12
VROUT
VRS output
O
SIGNAL
13
O2H
O2 sensor heater output
O
PWR



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