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AUIRS1170S 数据表(PDF) 10 Page - Infineon Technologies AG

部件名 AUIRS1170S
功能描述  automotive qualified smart secondary-side driver
Download  28 Pages
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制造商  INFINEON [Infineon Technologies AG]
网页  http://www.infineon.com
标志 INFINEON - Infineon Technologies AG

AUIRS1170S 数据表(HTML) 10 Page - Infineon Technologies AG

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AUIRS1170S
10
Rev. 2.3
2016-09-03
Detailed Pin Description
VCC: Power Supply
This is the supply voltage pin of the IC and it is monitored by the under voltage lockout circuit. It is possible to turn
off the IC by pulling this pin below the minimum turn off threshold voltage, without damage to the IC.
To prevent noise problems, a bypass ceramic capacitor connected to Vcc and COM should be placed as close as
possible to the AUIRS1170. This pin is internally clamped.
SYNC: Direct Turn-off and Reset
SYNC is used to directly turn-off the SR MOSFET by an external signal. The gate output of AUIRS1170 is low
when SYNC voltage is higher than VSYHI threshold. The propagation delay from SYNC goes high to gate turns off
is 50ns maximum. The turn-off of SYNC is a direct control and it ignores the MOT time (override).
The SYNC pin will reset MOT and Blanking time when SYNC switches from low to high. It will reset MOT timer
and Blanking timer only at the rising edge of signal. This function is useful for very low output voltage condition
(such as overload or short circuit) where the VD voltage is too low to reach Vth3 threshold to reset the timers.
SYNC pin also can be used to control the turn-on time of SR MOSFET (adding additional delay time at turn-on for
noise immunity). If not used, SYNC pin should be connected to COM.
MOT: Minimum On Time
The MOT programming pin controls the amount of minimum on time. Once VTH2 is crossed for the first time, the
gate signal will become active and turn on the power FET. Spurious ringings and oscillations can trigger the input
comparator off. The MOT blanks the input comparator keeping the FET on for a minimum time. The MOT is
programmed between 200ns and 3us (typ.) by using a resistor referenced to COM and can be programmed using
the following formula:
���������������� = 2.5 ∗ 1010 ����������������
EN: Enable
This pin is used to activate the IC “sleep” mode by pulling the voltage level below 1.6V (typ). In sleep mode the IC
will consume a minimum amount of current. All switching functions will be disabled and the gate will be inactive.
VD: Drain Voltage Sense
VD is the voltage sense pin for the power MOSFET Drain. This is a high voltage pin and particular care must be
taken in properly routing the connection to the power MOSFET drain. Additional Filtering is recommended; see
application section for details.
VS: Source Voltage Sense
VS is the differential sense pin for the power MOSFET Source and IC gnd connection. This pin must must be
connected as close as possible to the power MOSFET source pin. Good electrical connection must be done to
this pin since the internal devices and gate driver are referenced to this point.
VGATE: Gate Drive Output
This is the gate drive output of the IC. Drive voltage is internally limited and provides 2A peak source and 7A peak
sink capability. Although this pin can be directly connected to the power MOSFET gate, the use of minimal gate
resistor is recommended, especially when putting multiple FETs in parallel. Care must be taken in order to keep
the gate loop as short and as small as possible in order to achieve optimal switching performance.


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