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UCC24610DRBT Datasheet(PDF) 8 Page - Texas Instruments

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Part # UCC24610DRBT
Description  GREEN Rectifier Controller Device
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCC24610DRBT Datasheet(HTML) 8 Page - Texas Instruments

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UCC24610
SLUSA87B – AUGUST 2010 – REVISED SEPTEMBER 2010
www.ti.com
TERMINAL FUNCTIONS (continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
VCC (Positive Power Input)
Connect a DC power voltage to VCC. Bypass VCC to GND with a 0.1-µF or larger ceramic
capacitor using short PC board tracks. VCC supplies power to all circuits in the UCC24610.
VCC
4
I
Under-Voltage Lockout (UVLO) comparators prevent operation until VCC rises above
VCC(on). VCC can be used to safely turn off the UCC24610 by pulling VCC below VCC(off). In
the event that VCC drops below VCC(off), GATE immediately falls Low and EN/TOFF is
internally connected to GND with a 10-k
Ω resistance.
VD (Drain-Sense Voltage)
Connect this pin as close as possible to the controlled MOSFET drain pad through a short
PC board track, to minimize the effects of trace inductance on VD. VD must be >1.5 V and
the TOFF timer must be expired before the device may be armed to allow the controlled
MOSFET to be turned on the next switching cycle. Once armed, the controlled MOSFET is
turned on (GATE goes High) when VD falls more than -150 mV below VS. At that threshold,
VD
8
I
the GATE output goes High and the TON timer is triggered. GATE remains High at least as
long as the programmed TON time has not expired, unless a pulse at the SYNC input is
detected. After TON has expired, the GATE output is turned off when VD-VS voltage
decreases to -5 mV. If VD-VS decreases to -5 mV before TON expires, the controller enters
Light-Load Mode and the GATE pulse for the next switching cycle is suppressed. When the
VD voltage increases to 1.5 V, the TOFF timer is triggered and the GATE output is
prevented from turning on during the TOFF interval.
VS (Source-Sense Voltage)
VS
7
I
Connect this pin as close as possible to the controlled MOSFET source pad through a short
PC-board track, to minimize the effects of trace inductance on VS.
8
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): UCC24610


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