onsemi NCP51530BDR2G

Overview

NCP51530BDR2G from onsemi is a 700 V high-side/low-side gate driver IC with 3.5 A source / 3 A sink peak output current, 25 ns typical propagation delay (HI/LO), and SOIC-8 packaging. It drives external MOSFETs in half-bridge, LLC, and active-clamp topologies for high-frequency AC-DC power supplies and solar inverters.

For engineers reviewing the NCP51530BDR2G datasheet, pinout, applications, or equivalent options, key selection criteria include propagation delay matching (≤7 ns max), high dv/dt immunity (50 V/ns), UVLO thresholds (VCC ON = 9.1 V typ, VB ON = 8.5 V typ), and bootstrap-compatible high-side operation up to 700 V.

Technical Context

The NCP51530BDR2G integrates independent TTL/CMOS-compatible HIN/LIN inputs with Schmitt-trigger logic and no internal input filtering-enabling ultra-fast 25 ns propagation but requiring external RC noise suppression. Its level-shifting architecture supports floating high-side operation via bootstrap supply (VB), with dedicated HB return path and matched delay paths for synchronous switching.

It features dual UVLO protection (VCC and VB rails), 15 ns max rise/fall times into 1 nF load, and robust negative transient immunity on HB (−100 V @ 100 ns). The SOIC-8 package provides industry-standard pinout compatibility while supporting high-voltage creepage requirements for industrial and telecom SMPS designs.

Key Specifications

Pinout & Package

Package: SOIC-8 (Case 751-07), Pb-free, surface-mount. Creepage and clearance compliant for reinforced insulation in high-voltage applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance gate driver applications.

Compared with UCC27531DR and NCP51530ADR2G, the NCP51530BDR2G uniquely delivers 700 V capability with sub-30 ns timing and dual-rail UVLO-making it optimal for high-frequency, high-voltage resonant converters where timing accuracy and bootstrap reliability are non-negotiable.

Availability

NCP51530BDR2G is available at Aetrix Electronics and suitable for high-frequency server PSUs, solar microinverters, and automotive EPS systems requiring stable component supply across multi-year production cycles.

Supply support for NCP51530BDR2G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor leader focused on energy-efficient innovation, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.

The NCP51530BDR2G belongs to onsemi's high-performance gate driver product line, engineered specifically for MHz-class resonant and soft-switching power converters demanding ultra-low latency and robust high-voltage operation.

FAQ

What is the propagation delay specification for NCP51530BDR2G?

The NCP51530BDR2G has a typical propagation delay of 25 ns (HIN→HO and LIN→LO), with maximum values of 40 ns across temperature and supply conditions. This value is measured under zero-load conditions with 50 ns minimum input pulse width, and reflects the absence of internal input filtering-distinguishing it from the 60 ns NCP51530ADR2G variant. The NCP51530BDR2G achieves this performance while maintaining ≤7 ns delay matching between channels.

Does NCP51530BDR2G support bootstrap-based high-side drive?

Yes, the NCP51530BDR2G fully supports bootstrap-based high-side drive via its VB and HB pins. The VB pin accepts up to 700 V and powers the high-side driver stage, while HB serves as the floating return reference tied to the MOSFET source node. Its integrated VB UVLO (8.5 V turn-on threshold) ensures the high-side output remains disabled until the bootstrap capacitor reaches a safe operating voltage-critical for preventing shoot-through in half-bridge configurations.

What package type is used for NCP51530BDR2G?

The NCP51530BDR2G uses the SOIC-8 package (Case 751-07), a Pb-free, surface-mount outline with standard 1.27 mm pitch. This package provides proven thermal performance (R_JA = 183°C/W), industry-standard pin compatibility, and sufficient creepage for reinforced insulation in 700 V systems. It is distinct from the DFN10 variant (e.g., NCP51530BMNTWG), which offers improved thermal resistance but requires different PCB layout and assembly processes.

How does NCP51530BDR2G handle floating input pins?

The NCP51530BDR2G incorporates internal pulldown resistors on both HIN and LIN inputs, ensuring defined logic states (LO = 0, HO = 0) when either input is left unconnected or driven by open-drain sources. This behavior is explicitly documented in Table 7 of the datasheet and eliminates the need for external pull-down components-reducing BOM count and improving system robustness during initialization or fault conditions.

Is NCP51530BDR2G compatible with 3.3 V logic controllers?

Yes, the NCP51530BDR2G is fully compatible with 3.3 V logic controllers. Its input threshold voltages are specified as V_HIT = 2.3–3.1 V (rising) and V_LIT = 1.0–1.8 V (falling), with 1.3 V hysteresis-ensuring reliable recognition of 3.3 V CMOS/TTL signals across temperature and process variation. No level-shifting circuitry is required, simplifying interface design with microcontrollers, DSPs, and digital PWM controllers.