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PDF TLE7181EM Data sheet ( Hoja de datos )
| Número de pieza | TLE7181EM | |
| Descripción | H-Bridge and Dual Half Bridge Driver IC | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Data Sheet, Rev 1.1, Sept. 2010
TLE7181EM
www.DataSheet4U.net
H-Bridge and Dual Half Bridge Driver IC
Automotive Power
1 page  
3 Pin Configuration
3.1 Pin Assignment
BH2
GH2
SH2
GL2
VDH
RPP
Vs
VREG
ENA
ISN
ISP
ISO
1
2
3
4
5
6
7
8
9
10
11
12
H-Bridge and Dual Half Bridge Driver IC
TLE7181EM
Pin Configuration
24 BH1
23 GH1
22 SH1
21 GL1
20 SL
19 GND
18 S__C_DL
17 ERR
16 DIR
15 PWM
14 DRVDIS
13 DT
Figure 2 Pin Configuration
3.2
# of
Pins
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Definitions and Functions
Symbol
Function
BH2
GH2
SH2
GL2
VDH
RPP
VS
VREG
ENA
ISN
ISP
ISO
DT
DRVDIS
PWM
DIR
Pin for + terminal of the bootstrap capacitor of phase 2
Output pin for gate of high side MOSFET 2
Pin for source connection of high side MOSFET 2
Output pin for gate of low side MOSFET 2
Voltage input common drain high side for short circuit detection
charge pump output for reverse polarity protection of the motor bridge
Pin for supply voltage
Output of supply for driver output stage - connect to a capacitor
Input pin for reset of ERR registers, active switch off of external MOSFETs and low
quiescent current mode, set HIGH to enable operation
Input for OPAMP + terminal
Input for OPAMP - terminal
Output of OPAMP
Input for adjustable dead time function, connect to GND via resistor
Disable DIR/PWM interface & all output stages switched off
control input for PWM frequency and duty cycle
control input for spinning direction of the motor
Data Sheet
5 Rev 1.1, 2010-09-30
5 Page 
H-Bridge and Dual Half Bridge Driver IC
TLE7181EM
Description and Electrical Characteristics
____
ERR
DRVDIS
PWM
DIR
DT
VS ENA
VREG
Voltage regulator
Error logic
Reset
Power On Reset
loc k /
u nlo c k
V RE G
VDH
SCD
Input Logic
Dead Time
ON / OFF
ON / OFF
short circuit filter
blanking
SCD
SCD
Short Circuit
Detection Level
SCDL
VDH
Charge pump
BHx
RPP
Level
shifter
+
-
VSCP
Floating HS driver 2x
VREG
GHx
SHx
Level
shifter
+
-
VSCP
Floating LS driver 2x
GLx
SL
GND
Figure 3 Block Diagram of Driver Stages including Short Circuit Detection
5.1.3
Dead Time
In bridge applications it has to be assured that the external high side and low side MOSFETs are not “on” at the
same time, connecting directly the battery voltage to GND. The dead time generated in the TLE7181EM can be
programmed by applying an resistor between the DT pin and GND. Higher external resistor values lead to higher
dead time.
A minimum dead time applied, if the DT pin is connected to GND.
The typical dead time can be calculated with the following formula:
t deadtime [ µs ]
=
0.02
0.081
+ 2.4 4+Rdt[kΩ]
If an exact dead time of the bridge is needed, the use of the µC PWM generation unit is recommended.
5.1.4
Bootstrap Principle
The TLE7181EM provides a bootstrap based supply for its high side output stages.
The bootstrap capacitors are charged by switching on the external low side MOSFETs, connecting the bootstrap
capacitor to GND. Under this condition the bootstrap capacitor will be charged from the VREG capacitor via the
integrated bootstrap diode. If the low side MOSFET is switched off and the high side MOSFET is switched on, the
bootstrap capacitor will float together with the SHx voltage to the supply voltage of the bridge. Under this condition
the supply current of the high side output stage will discharge the bootstrap capacitor. This current is specified.
The size of the capacitor together with this current will determine how long the high side MOSFET can be kept on
without recharging the bootstrap capacitor.
Data Sheet
11 Rev 1.1, 2010-09-30
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet TLE7181EM.PDF ] | |
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