Diodes Incorporated AZ496MTR-G1

Overview

AZ496MTR-G1 from BCD Semiconductor Manufacturing Limited is a voltage-mode PWM controller IC designed for half-bridge DC-DC converters, featuring ±1% trimmed 4.95 V reference, on-chip oscillator (1–100 kHz), and dual error amplifiers. It supports single-ended or push-pull output operation via OUTPUT CTRL pin and delivers 100 mA sink/source capability at the TR output. Used in SMPS, backlight inverters, and battery chargers.

For engineers reviewing the AZ496MTR-G1 datasheet, AZ496MTR-G1 pinout, AZ496MTR-G1 application, or AZ496MTR-G1 equivalent, key selection criteria include dead-time control comparator threshold (3.3 V), maximum duty cycle (45%), oscillator timing range (RT = 1.8–500 kΩ, CT = 0.47 nF–10 µF), and SOIC-16 thermal impedance (73 °C/W).

Technical Context

The AZ496 implements voltage-mode PWM control with two independent error amplifiers (VIO ≤ 10 mV, CMRR ≥ 65 dB) feeding into a shared PWM comparator. Its internal oscillator supports master/slave configuration via RT/CT pins and provides frequency stability of ±1% over temperature (−40 to +85 °C).

Dead-time control is enforced by a dedicated comparator (VITH = 3.3 V) that prevents simultaneous conduction in half-bridge topologies. Output steering uses a pulse-steering flip-flop to ensure mutually exclusive C1/E1 and C2/E2 drive signals, eliminating double-pulse risk at either output.

Key Specifications

Pinout & Package

AZ496MTR-G1 is packaged in SOIC-16 (7.3 mm × 10.2 mm, 1.27 mm pitch), RoHS-compliant, green-marked, with thermal resistance θJA = 73 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PWM controller applications.

Compared with UC3846N and TL494CN, AZ496MTR-G1 uniquely combines ±1% reference, dual error amplifiers, and hardware dead-time control in one SOIC-16 package-enabling higher integration and tighter regulation in half-bridge converters without external timing or protection logic.

Availability

AZ496MTR-G1 is available at Aetrix Electronics and suitable for LCD backlight inverters, industrial SMPS, and battery chargers requiring stable component supply, RoHS compliance, and tape-and-reel delivery for automated assembly.

Supply support for AZ496MTR-G1 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

BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and power IC designer specializing in high-reliability, green-compliant semiconductor solutions for industrial, computing, and consumer markets.

AZ496 belongs to BCD's PWM controller product line, engineered specifically for half-bridge and push-pull DC-DC conversion with emphasis on integration, thermal robustness, and precision regulation in space-constrained power systems.

FAQ

What is the function of the OUTPUT CTRL pin (Pin 13)?

Pin 13 selects output configuration: connecting to GND enables single-ended or parallel output mode for simplified drive of one switch or paralleled transistors; connecting to VREF configures normal push-pull operation for complementary half-bridge drive. This eliminates external mode-select logic and supports topology flexibility without PCB redesign.

Can AZ496MTR-G1 operate with a 5 V supply?

No-AZ496MTR-G1 requires a minimum VCC of 7 V per its Recommended Operating Conditions. Below 7 V, internal reference regulation and oscillator startup are not guaranteed. The device draws 6–10 mA at 15 V, and operation below 7 V risks latch-up or undefined behavior at the error amplifiers and PWM comparator.

How does the DTC (Pin 4) pin prevent shoot-through?

Pin 4 is a comparator input with 3.3 V threshold. When asserted above this level, it forces both C1/E1 and C2/E2 outputs into high-impedance state for a fixed minimum off-time, ensuring no overlap between high-side and low-side conduction. This hardware-enforced blanking replaces external RC delay networks or digital dead-time generators.

Is AZ496MTR-G1 pin-compatible with AZ496P-G1?

Yes-both share identical pin numbering and electrical functionality. AZ496MTR-G1 (SOIC-16) and AZ496P-G1 (DIP-16) differ only in package type and thermal performance (θJA = 73 vs. 67 °C/W). Layout, schematic, and firmware remain identical; only mechanical mounting and reflow profile require adjustment.