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Diodes Incorporated AZ7500BP-E1
- Part No.:
- AZ7500BP-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- DC DC Switching Controllers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
AZ7500BP-E1.pdf
- Description:
- IC REG CTRLR BUCK 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,404
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Product details
Overview
AZ7500BP-E1 from Diodes Incorporated is a voltage-mode PWM controller IC designed for switching power supply regulation, featuring a trimmed 4.95V ±1% reference, dual error amplifiers, on-chip oscillator with master/slave capability, dead-time control comparator, and push-pull or single-ended output selection via CTRL pin. It operates across 7–36V supply range and supports SMPS designs up to 200kHz.
For engineers reviewing the AZ7500BP-E1 datasheet, AZ7500BP-E1 pinout, AZ7500BP-E1 application, or AZ7500BP-E1 equivalent, this page delivers verified functional identity, SO-16 package mapping, confirmed pin roles (e.g., FEEDBACK, CT/RT, OUTPUT, CTRL), real-world use cases in DC-DC converters and backlight inverters, and two validated alternative parts with documented electrical and operational differences.
Technical Context
The AZ7500BP-E1 implements voltage-mode PWM control using two independent error amplifiers (pins 1/2 and 15/16) that compare feedback signals against its internal 4.95V reference (pin 13). Its oscillator frequency (1–200 kHz) is set by external RT (pin 6) and CT (pin 5) components, with dead-time control (pin 4) preventing shoot-through in push-pull topologies.
Output configuration is determined by the CTRL pin (pin 12): grounded for single-ended operation, tied to VREF for push-pull mode. The dual NPN output transistors (C1/E1 and C2/E2, pins 10/11 and 8/9) each support 200mA sink/source, with saturation voltages of 1.1V (CE) and 1.5V (EF) at rated current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREF | 4.95V ±1% - enables precise output voltage regulation in feedback loops without external trimming resistors |
| fOSC Range | 1–200 kHz - adjustable via RT/CT network to match transformer size, efficiency, and EMI requirements |
| Output Type | Dual NPN transistor outputs - supports both push-pull (with DTC) and single-ended configurations for flexible topology implementation |
| IOUT Max | 200 mA per output - drives gate transformers or MOSFET drivers directly without external buffers in medium-power SMPS |
| VCC Range | 7–36 V - accommodates wide-input industrial and automotive power rails without auxiliary bias winding |
| TA Operating | −40 to +85°C - qualified for industrial temperature environments without derating in typical convection-cooled enclosures |
| Dead-Time Control | Pin 4 input with 3V threshold - prevents simultaneous conduction in complementary switch pairs, eliminating cross-conduction losses |
Pinout & Package
Package: SO-16 (3.9mm × 9.9mm body, 1.27mm pitch, RoHS-compliant lead-free finish).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Error Amp 1 Non-Inverting Input | Accepts regulated output voltage via resistor divider for closed-loop feedback control |
| 2 (IN−) | Error Amp 1 Inverting Input | Connected to VREF (pin 13) to establish reference comparison point |
| 3 (FEEDBACK) | Error Amp 2 Inverting Input | Supports secondary-side sensing or auxiliary regulation path with 0.3mA max input current |
| 4 (DTC) | Dead-Time Control Comparator Input | Threshold-triggered input (3V) to insert minimum off-time between complementary outputs |
| 5 (CT) | Oscillator Timing Capacitor | Connects to RT (pin 6) to set oscillator frequency; 0.00047–10µF range supported |
| 6 (RT) | Oscillator Timing Resistor | Sets oscillator frequency with CT; 1.8–500kΩ range defines 1–200kHz operation |
| 7 (GND) | Power Ground Reference | Common return for VCC, reference, and error amplifier circuits; requires low-impedance PCB plane |
| 8 (C2) | Output Transistor 2 Collector | Drives high-side switch in push-pull or second leg in parallel configuration |
| 9 (E2) | Output Transistor 2 Emitter | Emitter-follower output option; used for level-shifted drive or current-sensing node |
| 10 (C1) | Output Transistor 1 Collector | Primary output driver for low-side switch or single-ended topology |
| 11 (E1) | Output Transistor 1 Emitter | Provides emitter-follower output with 1.5V saturation drop at −200mA |
| 12 (CTRL) | Output Mode Control | GND = single-ended; VREF = push-pull - selects topology without external logic |
| 13 (REF) | 4.95V Reference Output | Stable ±1% reference for feedback dividers, error amp references, or external circuitry |
| 14 (VCC) | Supply Voltage Input | 7–36V operating range; internal regulator powers all internal blocks including reference and oscillators |
| 15 (IN+) | Error Amp 2 Non-Inverting Input | Optional second feedback path for multi-rail or isolated secondary regulation |
| 16 (IN−) | Error Amp 2 Inverting Input | Configurable reference point; may tie to REF or alternate voltage for differential sensing |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed 4.95V reference | ±1% accuracy over −40°C to +85°C enables <±2% output voltage tolerance without post-assembly calibration |
| Uncommitted output transistors | Each output supports 200mA sink/source and configurable as common-emitter or emitter-follower for optimal drive strength and voltage swing |
| Single-ended/push-pull selection | CTRL pin (pin 12) eliminates need for external logic or jumpers to reconfigure topology during design or production |
| No double-pulse generation | Internal pulse-steering flip-flop ensures only one output is active per cycle, preventing shoot-through in half-bridge implementations |
| On-chip oscillator with master/slave sync | RT/CT pins allow synchronization to external clock (via CT shorting) for multi-phase interleaving or noise reduction |
Applications
| DC-DC Buck Converter | LCD Backlight Inverter |
|---|---|
|
Use Scenario: Step-down conversion from 12–40V input to stable 5V/1A output in industrial HMIs and embedded controllers. IC Role / Device Role / Timing Role: Primary PWM controller generating variable-duty-cycle gate drive signals synchronized to internal oscillator. Use Value: Dual error amps enable precise regulation under load transients; 4.95V reference minimizes output drift across temperature. |
Use Scenario: Driving CCFL or LED backlight transformers in medical displays requiring stable brightness and low EMI. IC Role / Device Role / Timing Role: Push-pull controller with DTC ensuring zero-voltage switching transitions and reduced transformer stress. Use Value: Adjustable fOSC (1–200kHz) allows optimization for transformer Q-factor and audible noise suppression. |
| AC-DC Adapter | USB-C PD Power Stage |
|
Use Scenario: Secondary-side regulated flyback adapter delivering 12V/2A for IoT gateways with universal AC input. IC Role / Device Role / Timing Role: Feedback-controlled PWM modulator interfacing with optocoupler-isolated error signal on pin 3. Use Value: FEEDBACK pin accepts up to 0.3mA input current, enabling direct connection to TL431-based opto circuits without pull-up resistors. |
Use Scenario: Programmable power supply stage supporting 5–20V output profiles in USB-C PD sink applications. IC Role / Device Role / Timing Role: Voltage-mode controller adapting to dynamic reference changes via microcontroller-driven DAC on REF or CTRL pins. Use Value: CTRL pin toggles between single-ended (for low-noise 5V rail) and push-pull (for high-efficiency 20V rail) without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3842B (ON Semiconductor) | Current-mode control; fixed 5V reference; single output; no DTC or dual error amps | Requires external slope compensation; limited to single-output flyback or boost; no push-pull support | Choose when cost-sensitive, low-component-count flyback designs dominate and current-mode stability is preferred |
| TL494 (Texas Instruments) | Fixed 5.0V reference; dual error amps; push-pull only; no programmable oscillator; higher quiescent current (15mA) | Cannot operate in single-ended mode; lacks DTC pin; oscillator set only by RT/CT but no slave sync capability | Choose for legacy designs where 5.0V reference matches existing feedback networks and push-pull-only operation suffices |
Compared with UC3842B and TL494, the AZ7500BP-E1 offers voltage-mode control with tighter reference accuracy (±1% vs ±2%), configurable topology via CTRL pin, integrated DTC for robust push-pull timing, and lower ICC (6–10mA), making it preferable for precision industrial SMPS where layout flexibility and thermal efficiency matter.
Availability
AZ7500BP-E1 is available at Aetrix Electronics and suitable for industrial power supplies, LCD backlight inverters, and USB-C PD power stages requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AZ7500BP-E1 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The AZ7500B series belongs to Diodes' power management controller product line, engineered specifically for cost-effective, high-reliability switching power supplies in industrial, computing, and display applications.
FAQ
What is the maximum recommended oscillator frequency for stable operation?
The AZ7500BP-E1 supports oscillator frequencies up to 200 kHz under specified conditions (CT = 0.001 µF, RT = 30 kΩ, TA = 25°C). At 200 kHz, propagation delays remain within specification, and output rise/fall times (100 ns/25 ns) ensure clean switching. Operation above 200 kHz risks duty-cycle distortion and reduced dead-time margin, especially at temperature extremes.
Can the AZ7500BP-E1 drive MOSFET gates directly without external drivers?
Yes - each output transistor delivers 200 mA sink/source capability and supports common-emitter (VCE(sat) = 1.1 V @ 200 mA) or emitter-follower (VCC(sat) = 1.5 V @ −200 mA) configurations. For logic-level MOSFETs with Qg ≤ 20 nC and VGS(th) ≤ 2.5 V, direct drive is viable; for high-side N-channel or high-Qg devices, a dedicated gate driver is recommended.
How does the DTC (pin 4) function affect push-pull timing?
Pin 4 is the Dead-Time Control input with a 3.0 V threshold. When asserted above 3.0 V, it forces both outputs inactive for a minimum interval, preventing overlap during polarity reversal. This ensures safe commutation in center-tapped transformer or half-bridge topologies, reducing shoot-through current and associated thermal stress on power switches.
Is the AZ7500BP-E1 pin-compatible with the AZ7500C variant?
No - while both share identical SO-16 pinouts and functional blocks, the AZ7500C features a 5.0 V reference (vs. 4.95 V), resulting in measurable output voltage shift in feedback networks calibrated for AZ7500BP-E1. Swapping requires recalculating feedback resistors and verifying loop stability, especially in precision-regulated systems.
AZ7500BP-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 7V ~ 36V
- Frequency - Switching:
- 1kHz ~ 200kHz
- Duty Cycle (Max):
- 45%
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-DIP
AZ7500BP-E1 FAQ
1.How can I place an order for AZ7500BP-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ7500BP-E1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AZ7500BP-E1 reliable?
The price and inventory of AZ7500BP-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ7500BP-E1 is usually 5 days.
3.What payment methods are accepted for AZ7500BP-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ7500BP-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ7500BP-E1?
AZ7500BP-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ7500BP-E1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AZ7500BP-E1?
For technical support, including AZ7500BP-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ7500BP-E1 requirements.
6.How does Aetrix verify that AZ7500BP-E1 is sourced from the original manufacturer or authorized distributors?
All AZ7500BP-E1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AZ7500BP-E1 meets industry standards.
7.What is the process for return or replacement of AZ7500BP-E1?
All AZ7500BP-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ7500BP-E1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AZ7500BP-E1 part is unused and in its original packaging.
Return procedure for AZ7500BP-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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