Diodes Incorporated AZ7500CMTR-EA

Overview

AZ7500CMTR-EA from BCD Semiconductor Manufacturing Limited is a voltage-mode PWM controller IC designed for switching power supply regulation, featuring a 5.0 V ±1% trimmed reference, dual error amplifiers, on-chip oscillator with adjustable frequency (1–200 kHz), dead-time control comparator, and push-pull or single-ended output selection via OUTPUT CTRL pin. It supports SMPS, backlight inverters, and battery chargers.

For engineers reviewing the AZ7500CMTR-EA datasheet, AZ7500CMTR-EA pinout, AZ7500CMTR-EA application, or AZ7500CMTR-EA equivalent, key selection criteria include reference accuracy (±1%), oscillator timing flexibility (RT/CT programmable), dual-error-amplifier architecture for multi-loop control, and SOIC-16 package compatibility with industrial temperature range (−40°C to +85°C).

Technical Context

The AZ7500CMTR-EA implements voltage-mode PWM control using two independent error amplifiers (pins 1/2 and 15/16) that feed into a shared PWM comparator (pin 3), enabling precise feedback regulation across multiple rails or sensing paths. Its oscillator (pins 5/6) supports master/slave operation via CT/RT configuration and delivers stable frequency with <1% drift over temperature.

Dead-time control (DTC) at pin 4 prevents shoot-through in push-pull topologies by enforcing minimum off-time between complementary outputs. Output steering logic (Q1/Q2 flip-flop) and output control (pin 13) determine whether C1/E1 and C2/E2 operate in parallel (single-ended) or anti-phase (push-pull), with internal circuitry eliminating double-pulsing.

Key Specifications

Pinout & Package

Package: SOIC-16 (3.9 mm × 9.9 mm, 1.27 mm pitch), RoHS-compliant lead-free (EA suffix), thermal resistance RθJA = 73°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UC3842BD1R2G and TL494CN, the AZ7500CMTR-EA offers superior reference accuracy (±1% vs. ±2%/±5%), integrated mode selection (no external logic), and programmable dead-time - making it optimal for precision multi-loop industrial power supplies where reliability and design simplicity are critical.

Availability

AZ7500CMTR-EA is available at Aetrix Electronics and suitable for SMPS power supplies, backlight inverters, and battery chargers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AZ7500CMTR-EA 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, cost-optimized mixed-signal solutions for industrial, computing, and consumer power systems.

The AZ7500C product line delivers integrated voltage-mode PWM controllers targeting cost-sensitive yet performance-demanding offline and DC-DC power conversion applications - emphasizing precision reference, dual-loop flexibility, and robust thermal design in standard packages.

FAQ

What is the maximum allowable VCC voltage for continuous operation?

The AZ7500CMTR-EA supports continuous operation up to 36 V VCC, with absolute maximum rating at 40 V. Operation above 36 V risks exceeding recommended operating conditions and may degrade reference stability or oscillator accuracy. Thermal derating must be applied above 25°C ambient due to RθJA = 73°C/W.

Can the AZ7500CMTR-EA drive MOSFETs directly?

No - its C1/E1 and C2/E2 outputs are rated for 200 mA sink/source and designed to drive bipolar transistors (e.g., KSA1010/KSC1845) or dedicated gate drivers. Direct MOSFET gate driving is not supported due to insufficient peak current and lack of level-shifting for high-side N-channel devices.

How does the OUTPUT CTRL pin affect switching behavior?

When OUTPUT CTRL (pin 13) is tied to GND, outputs C1/E1 and C2/E2 operate in parallel (single-ended mode). When tied to REF (5 V), they operate in anti-phase (push-pull mode). This selection changes pulse-steering logic internally - no external timing adjustment is needed.

Is the 5 V reference output (pin 12) buffered?

Yes - the REF pin provides a buffered 5.0 V ±1% output capable of sourcing up to 10 mA. It is internally decoupled and trimmed; external bypassing with 0.1 µF ceramic capacitor is recommended to maintain stability under dynamic load conditions.