4 Pin Configuration and Functions

UCC218915-Q1 UCC218915-Q128-Pin DFP SSOP PackageTop View

Figure 4-1 UCC218915-Q128-Pin DFP SSOP PackageTop View

Pin Functions

PIN		I/O⁽¹⁾	DESCRIPTION
NAME	NO.	I/O⁽¹⁾	DESCRIPTION
GND	1, 14	G	Input power supply and logic ground reference.
NC	2, 3, 12, 13, 16, 27	—	No connection
IN+	4	I	Non-inverting gate driver control input. Tie to VCC if unused.
IN-	5	I	Inverting gate driver control input. Tie to GND if unused.
RDY	6	O	Power good for VCC-GND, VDD-COM, and overtemperature. RDY is an open-drain output and can be paralleled with other RDY signals.
FLT	7	O	Active low fault alarm output upon overcurrent or short circuit. FLT is an open drain output and can be paralleled with other faults.
RST/EN	8	I	The RST/EN serves two purposes: 1) Enables or shuts down the output side. The FET is turned off by a regular turn-off if EN is set to low; 2) Resets the DESAT condition signaled on the FLT pin if RST/EN is set to low for more than 800ns. A reset of FLT is asserted at the rising edge of RST/EN.
ASC_FB	9	O	ASC feedback output. This pin outputs high when ASC is active and the output stage is on. Leave floating if unused.
VCC	10	P	Input power supply from 3V to 5.5V. Bypass with a >1μF capacitor to GND. Place decoupling capacitor close to the pin.
TEST	11	I	Test mode input. Tie to GND or leave floating if unused.
VEE	15, 28	P	Negative supply rail for gate drive voltage. This is the OUTN low-level output voltage. Bypass with a >1μF capacitor to COM. Place decoupling capacitor close to the pin.
ASC	17	I	Active high to enable active short circuit function to force output on during system failure events. Tie to COM if unused.
DESAT	18	I	Desaturation current protection input. Tie to COM if unused.
COM	19	P	Common ground reference. Connect to emitter pin for IGBTs and source pin for MOSFETs.
VDD	20	P	Positive supply rail for gate drive voltage. This is the OUTP high-level output voltage. Bypass with a >1μF capacitor to COM. Place decoupling capacitor close to the pin.
VBP	21	P	Bias supply for the OUTP low voltage. A capacitor to VDD may be used to stabilize this supply.
OUTP	22	O	Pre-driver output for driving external buffer PMOS in a push-pull configuration.
OUTN	23	O	Pre-driver output for driving external buffer NMOS in a push-pull configuration.
SSD/GATE	24	O	Soft shutdown pull down for turning off after a DESAT fault. Connect a resistor from this pin to the gate of an IGBT or MOSFET to adjust the shutdown current. This pin is also used to monitor the gate voltage for the external Miller clamp.
CLMPE	25	O	External active Miller clamp control. Connect this pin to the gate of the external Miller clamp MOSFET. Leave floating if unused.
VBN	26	P	Bias supply for the OUTN high voltage. A capacitor to VEE may be used to stabilize this supply.

(1) P = Power, G = Ground, I = Input, O = Output