Automotive 30V VDD, 10A/10A single-channel low-side driver with 4V UVLO and low propagation delay

The UCC27614-Q1 is a single channel, high-speed, low-side gate driver capable

of effectively driving MOSFET, IGBT, SiC, and GaN power switches. The UCC27614-Q1 has a typical peak drive strength of 10A,

which reduces the rise and fall times of the power switches, lowering switching

losses and increasing efficiency. The small propagation delay of the UCC27614-Q1 yields better power stage efficiency by

improving dead-time optimization, pulse width utilization, control loop response,

and transient performance of the system.

The UCC27614-Q1 can handle –10V on its inputs, which

improves robustness in systems with moderate ground bouncing. The inputs are

independent of supply voltage and can be connected to most controller outputs for

maximum control flexibility. An independent enable signal allows the power stage to

be controlled independent of the main control logic. The gate driver can quickly

shut off the power stage if there is a fault in the system (which requires the power

train to be turned off). The enable function also improves system robustness. Many

high-frequency switching power supplies exhibit high frequency noise at the gate of

the power device, which can get injected into the output pin of the gate driver and

can cause the driver to malfunction. The UCC27614-Q1

performs well in such conditions due to its transient reverse current and reverse

voltage capability.

The strong internal pulldown MOSFET

holds the output low if the VDD voltage is below the specified UVLO threshold. This

active pulldown feature further improves system robustness. The 10A drive current of

the UCC27614-Q1 in the 2mm

× 2mm package improves system power density. This small

package also enables optimum gate driver placement and improved layout.