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TPS2412DR Datasheet(PDF) 9 Page - Texas Instruments

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Part # TPS2412DR
Description  N1 and ORing Power Rail Controller
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS2412DR Datasheet(HTML) 9 Page - Texas Instruments

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background image
C
+
-
+
-
A
GATE
HVUV
EN
HVUV
RSET
A
BYP
C
GND
EN
A
RSVD
EN
FAST
COMP.
T >135°C
V(DD)
V(DD)
V(BIAS)
0.5V
3mV
10mV
10V
‘12: AMP
‘13:COMP
BIAS
and
Control
ChargePump
andBiasSupply
TPS2412, TPS2413
www.ti.com
SLVS728C – JANUARY 2007 – REVISED NOVEMBER 2015
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 Definitions
The following descriptions refer to the pinout and the functional block diagram.
A, C: The A pin serves as the simulated diode anode and the C as the cathode. GATE is driven high when V(AC)
exceeds 10 mV. Both devices provide a strong GATE pulldown when V(AC) is less than the programmable fast
turnoff threshold. The TPS2412 has a soft pulldown when V(AC) is less than 10 mV but above the fast turnoff
threshold.
Several internal comparator and amplifier circuits monitor these two pins. The inputs are protected from excess
differential voltage by a clamp diode and series resistance. If C falls below A by more than about 0.7 V, a small
current flows out of C. Protect the internal circuits with an external clamp if C can be more than 6 V lower than A.
The internal charge pump output, which provides bias power to the comparators and voltage to drive GATE, is
referenced to A. Some charge pump current appears on A due to this topology. The A and C pins should be
Kelvin connected to the MOSFET source and drain. A and C connections should also be short and low
impedance, with special attention to the A connection. Residual noise from the charge pump can be reduced with
a bypass capacitor at A if the application permits.
BYP: BYP is the internal charge pump output, and the positive supply voltage for internal comparator circuits and
GATE driver. A capacitor must be connected from BYP to A. While the capacitor value is not critical, a 2200-pF
ceramic is recommended. Traces to this part must be kept short and low impedance to provide adequate filtering.
CAUTION
Shorting this pin to a voltage below A damages the TPS241x.
Copyright © 2007–2015, Texas Instruments Incorporated
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Product Folder Links: TPS2412 TPS2413


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