BMS Single-phase enhancement-mode GaN half-bridge chip

CT3902

100V Half-Bridge GaN Driver with Interlocking PWM Inputs.

 1.Description 

The CT3902 is a 100V half-bridge driver designed to efficiently drive both high-side and low-side gallium nitride (GaN) field effect transistor (FET), customized to address challenges commonly encountered in conventional MOSFET driver solutions. An internal smart bootstrap (BST) switch prevents overcharging of the high-side floating supply BST capacitor during dead times, thus protecting the gate of the GaN FET while maintaining consistent gate voltage for both sides of GaN FETs. The CT3902 features input interlocking with internal adaptive shoot-through protection circuit, ensuring no simultaneous output conduction even at near zero dead times.

The CT3902 has two logic inputs to control high-side and low-side drivers independently for maximum flexibility, and drivers have split outputs to adjust turn- on and turn-off speeds separately. The strong driving capability and excellent delay matching make the CT3902 suitable for high power and high frequency applications.

 2.Features 

★ Independent High-Side & Low-Side Logic Inputs

★ High-Side and Low-Side Driver Interlocking

★ Split Outputs for Adjustable Turn-on/-off Speeds

★ Strong 1-Ω Pull-Up and 0.2-Ω Pull-Down Resistance

★ Internal Strong and Smart Bootstrap Switch

★ Adaptive Shoot-Through Protection

★ Fast Propagation Delay (20ns Typical)

★ Excellent Delay Matching (1ns Typical)

★ High-Side Floating Supply Operates up to 100V DC

★ Built-In UVLO, OVLO, OTP Protections

★ 35μA Low VCC Quiescent Current

★ WLCSP 1.62mmx1.62mm Package

 3.Applications 

★ Half-Bridge and Full-Bridge Converters

★ High-Voltage Synchronous DC-DC Converters

★ High Frequency, High Power Density Applications

★ 48V DC Motor Drive

★ High Power Class-D Audio Power Amplifier

★ Automotive 48V/12V Bi-directional DC-DC

 4.Pin information