The UCC5710x devices are TI's first low-side gate driver family which uses desaturation (DESAT) protection, whereas the UCC5714x devices are TI's first low-side gate driver family with over-current protection (OCP, or OC protection). These single-channel families were designed primarily for both automotive and industrial topologies that require additional protection. The UCC571x8 devices target IGBT while the UCC571x2 devices target SiC FETs. Some of the benefits are discussed below:

Protection

The UCC5710x devices have DESAT protection, which is a voltage-based detection of the collector of a FET. When the DESAT threshold is tripped, the outputs of the gate driver are turned off, preventing system damage.

The UCC5714x devices have OCP, which is a current-based detection which utilizes a shunt resistor or sensing-FET. Using a voltage threshold at the OC pin, when the voltage across the shunt resistor is higher than the voltage threshold of the gate driver, the output of the driver turns off.

During a short-circuit event, both gate driver families turns off the outputs of the driver, and the fault pin is pulled to ground. The integrated fault reporting maintains the fault signal to the MCU and keeps the outputs of the driver off until the fault is cleared. This extra level of protection compared to a comparable driver without protection allows for a safer system in noisy or harsh environments.

Feature Options

The UCC571xx devices have pinouts which add useful features depending on what the system requires:

• Bipolar ground: UCC571xxB devices in the D package have bipolar ground which provides negative clearance below ground; this prevents accidental turn-on from miller capacitor-induced noise.
• Split output: UCC571xxC devices in the D package have split outputs which utilizes separate pins for sourcing and sinking current. This allows for complete control and customizable gate resistance for turn-on and turn-off.
• Enable: UCC5710xW devices have an enable pin, which is an additional condition to make output high. In the event of a system fault, turning Enable low can quickly shut off the gate drive.

Internal Voltage Reference

The UCC5710x devices have an integrated LDO which creates a 5V bias with a max of 20mA. This LDO can provide an additional bias supply without needing to redesign the power rail. The LDO typically is used to bias digital isolators, thermistors, modulators, and other components.

There are some technical features that can provide benefits to a design engineer.

The UCC571xx family of devices have a wide variety of end equipments that have targeted sockets. Below are some topologies and end equipments where the UCC5710x family of devices can fit.

Figure 1 UCC5710x-Q1 in Automotive PTC Heater

Figure 2 UCC5710x-Q1 in xEV Traction Inverter

Figure 3 UCC5710x-Q1 in Automotive HVAC Compressor

Figure 4 UCC571xx in Servo Drives

Figure 5 UCC5714x in Residential Air Conditioner

Device Selection Guides

The UCC5710x devices have distinct features, electrical specifications, and pinouts. To aid in selection, the following tables help distinguish major differences between part numbers, variants, and provide insight comparing to legacy devices.

Table 5 UCC5710x Pinouts by Variants

	Pinouts
Variant	UCC5710xB, UCC57102Z	UCC5710xC	UCC5710xW
UVLO	8V, 12V	8V, 12V	8V, 12V
Variant Feature	Bipolar ground	Split output	Enable
Pinout

Table 6 UCC5714x Pinouts by Variants

	Pinouts
Variant	UCC5714xA
UVLO	8V, 12V
Variant Feature	-250mV OCP
Pinout