Datasheet

6
5
4
1
2
3
IN+
IN-
GND
VDD
OUTH
OUTL
UCC27511
R1
R2
Q1
IN+
D1
C1
+
VOUT
VSOURCE
L1
C2
V+
4.5 V to 18 V
Non-Inverting Input
6
5
4
1
2
3
IN+
IN-
GND
VDD
OUTH
OUTL
UCC27511
R1
R2
Q1
IN-
D1
C1
+
VOUT
VSOURCE
L1
C2
V+
4.5 V to 18 V
Inverting Input
1
2
3
6
5
4
IN+
GND
VDD
IN-
GND
OUT
UCC27512
R3
Q1
V+
D1
C1
+
VSOURCE
L1
C2
IN-
4.5 V to 18 V
Inverting Input
1
2
3
6
5
4
IN+
GND
VDD
IN-
GND
OUT
UCC27512
R3
Q1
IN+
D1
C1
+
VOUT
VSOURCE
L1
C2
V+
4.5 V to 18 V
Non-Inverting Input
UCC27511
UCC27512
SLUSAW9E –FEBRUARY 2012–REVISED DECEMBER 2013 www.ti.com
TYPICAL APPLICATION DIAGRAMS
DESCRIPTION (CONTINUED)
UCC27511 features a dual-input design which offers flexibility of implementing both inverting (IN- pin) and non-
inverting (IN+ pin) configuration with the same device. Either IN+ or IN- pin can be used to control the state of
the driver output. The unused input pin can be used for enable and disable functions. For safety purpose, internal
pullup and pulldown resistors on the input pins ensure that outputs are held low when input pins are in floating
condition. Hence the unused input pin is not left floating and must be properly biased to ensure that driver output
is in enabled for normal operation.
The input pin threshold of the UCC27511 device is based on TTL and CMOS-compatible low-voltage logic which
is fixed and independent of the VDD supply voltage. Wide hysteresis between the high and low thresholds offers
excellent noise immunity.
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