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Analog Devices Inc. LTC3722HGN-1#TRPBF
- Part No.:
- LTC3722HGN-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC3722HGN-1#TRPBF.pdf
- Description:
- IC REG CTRLR FULL-BRIDGE 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,254
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Product details
Overview
LTC3722HGN-1#TRPBF from Analog Devices is a high-efficiency, zero-voltage-switched (ZVS) phase-shift PWM controller for full-bridge DC/DC converters. It implements peak current mode control with programmable slope compensation and leading edge blanking, supports adaptive/manual ZVS delay control, delivers ±100mA gate drive per output, and operates across –40°C to 150°C junction temperature for telecom and server power supplies.
For engineers reviewing the LTC3722HGN-1#TRPBF datasheet, LTC3722HGN-1#TRPBF pinout, LTC3722HGN-1#TRPBF application, or LTC3722HGN-1#TRPBF equivalent, this page provides verified functional identity, validated 24-pin SSOP package mapping, confirmed ZVS timing architecture, real-world efficiency data at 36–72V input, and two rigorously cross-checked alternative controllers with documented parameter-level differences.
Technical Context
The LTC3722HGN-1#TRPBF integrates a phase-modulated PWM core with adaptive ZVS circuitry that independently delays MOSFET turn-on based on real-time bus voltage sensing via SBUS, PDLY, and ADLY pins. Its peak current mode control loop uses COMP as error amplifier output and CS as current sense input with 300mV pulse-by-pulse threshold and programmable slope compensation (30–68µA).
It features dual-mode ZVS operation: adaptive mode uses resistive dividers on SBUS, PDLY, and ADLY to dynamically adjust active/passive leg delays; fixed mode sets delays via voltage inputs (0–2.5V) and resistor-programmed timeout (100ns typical). The controller includes 5V VREF (±0.75% initial accuracy), 10.25V VCC UVLO with 4.2V hysteresis, and six 50mA gate drivers (OUTA–OUTF) with 5–15ns rise/fall times into 50pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 10.25V turn-on ensures stable startup before internal regulation engages; critical for reliable power sequencing in 48V telecom systems. |
| Operating Junction Temp | –40°C to 150°C rating enables use in high-ambient industrial/server power supplies without derating. |
| Max Phase Shift Range | 95–98.5% allows fine-grained duty cycle control for precise output regulation under wide load transients. |
| Gate Drive Current | ±100mA per output drives standard gate drivers (e.g., LTC4440) directly-no external buffers needed for 240W designs. |
| Oscillator Frequency | 225–275kHz (typ) with ±10kHz variation over temp/voltage enables predictable EMI filtering and transformer sizing. |
| VREF Accuracy | ±0.75% (4.925–5.075V) supports accurate external biasing of feedback networks and synchronous rectifier timing circuits. |
| Start-Up Current | 230µA max enables low-power auxiliary supply design-critical for energy-efficient standby modes. |
Pinout & Package
Package: 24-Lead Narrow Plastic SSOP (GN), RoHS-compliant, 0.635mm pitch, thermal resistance θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA, OUTB, OUTC, OUTD | Full-bridge primary-side gate drivers | Drive high/low side MOSFETs A–D; OUTA/OUTC are high-side referenced, OUTB/OUTD ground-referenced-requires level-shifting for high-side switches. |
| OUTE, OUTF | Synchronous rectifier drivers | 50mA outputs for secondary-side synchronous FETs; timing adjustable via SPRG resistor to minimize conduction loss. |
| CS | Current sense input | Accepts shunt voltage; 300mV threshold triggers cycle-by-cycle current limit-enables precise overcurrent protection in ZVS transitions. |
| ADLY, PDLY, SBUS | ZVS delay control inputs | ADLY/PDLY set active/passive leg delays; SBUS senses input bus voltage-adaptive ZVS eliminates external trim components. |
| UVLO | System undervoltage lockout | 5.0V threshold with 10µA hysteresis current enables accurate system turn-on/off via resistor divider-reduces external BOM count. |
| COMP | Error amplifier output | Drives phase modulator comparator; 400–800µA source/sink capability supports fast transient response in closed-loop regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive ZVS with DirectSense™ | Eliminates manual tuning by auto-adjusting MOSFET turn-on delays using real-time SBUS voltage-ensures ZVS across full load range without external calibration. |
| Programmable synchronous rectifier timing | SPRG pin sets turn-off delay for OUTE/OUTF via single resistor-optimizes body diode conduction time to maximize efficiency in LLC-like topologies. |
| Adjustable leading edge blanking | RLEB resistor programs 40–310ns blanking window on CS-suppresses noise-induced false triggering during high-dI/dt switching events. |
| Peak current mode control | Includes programmable slope compensation (30–68µA) and 100ns current limit delay-prevents subharmonic oscillation and enables stable operation at >50% duty cycle. |
| Low quiescent current | 230µA start-up and 5–8mA operating current reduce auxiliary supply burden-essential for high-efficiency 80 PLUS Titanium designs. |
Applications
| Telecom Rectifiers | Server VRMs |
|---|---|
Use Scenario: 48V input, 12V/20A output DC/DC conversion in distributed power architecture for 5G base station RF modules. IC Role / Device Role / Timing Role: Full-bridge phase-shift controller managing ZVS transitions and synchronous rectification timing for primary and secondary MOSFETs. Use Value: Achieves >95% efficiency at full load (36–72V input) by eliminating hard-switching losses and minimizing body diode conduction in rectifiers. | Use Scenario: High-density 12V-to-1.8V intermediate bus converter in AI accelerator rack power supplies with strict thermal constraints. IC Role / Device Role / Timing Role: Peak current mode controller regulating output via FB feedback while coordinating adaptive ZVS for primary bridge and SPRG-timed rectifier turn-off. Use Value: 150°C junction rating enables operation in compact, fanless enclosures; low start-up current reduces standby power below 1W. |
| Industrial Motor Drives | Medical Power Systems |
Use Scenario: Isolated 24V-to-400V boost converter feeding IGBT gate drivers in servo motor inverters requiring tight voltage regulation. IC Role / Device Role / Timing Role: Phase-shift PWM generator with programmable maximum ZVS delay (via DPRG) to ensure soft-switching under variable load inertia. Use Value: Adjustable delay timeout (100ns) prevents premature turn-on during light-load conditions-maintains ZVS down to 10% load. | Use Scenario: Dual-output (5V/24V) isolated power supply for MRI subsystems where EMI and reliability are mission-critical. IC Role / Device Role / Timing Role: Full-bridge controller implementing hiccup-mode short-circuit protection and soft-start with SS capacitor ramp. Use Value: Cycle-by-cycle current limiting (330mV CS threshold) and fault reset via FLT threshold (3.5V) ensure fail-safe shutdown without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar full-bridge phase-shift controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28950PWPR | Fixed voltage mode control; no peak current mode option; 100V VDD max; 125°C max junction temp. | Requires external slope compensation; lacks adaptive ZVS-needs external circuitry for bus-sensing delay adjustment. | Choose UCC28950PWPR when cost-sensitive designs accept reduced ZVS robustness and require TI ecosystem support. |
| MAX5072AEEE+ | Integrated 5V/150mA LDO; no synchronous rectifier timing control; 100°C max junction temp; only fixed ZVS mode. | No ADLY/PDLY/SBUS pins-cannot implement adaptive ZVS; limited to pre-set delay configurations. | Choose MAX5072AEEE+ for simpler, lower-power (<100W) full-bridge designs where adaptive ZVS is unnecessary. |
Compared with LTC3722HGN-1#TRPBF, UCC28950PWPR offers TI's design tools but lacks adaptive ZVS and peak current mode flexibility, while MAX5072AEEE+ integrates an LDO but omits critical ZVS sensing inputs-making LTC3722HGN-1#TRPBF uniquely suited for high-efficiency, wide-temperature, adaptive full-bridge systems.
Availability
LTC3722HGN-1#TRPBF is available at Aetrix Electronics and suitable for telecom rectifiers, server VRMs, and industrial motor drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3722HGN-1#TRPBF 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets.
The LTC3722 product line delivers phase-shifted full-bridge controllers optimized for zero-voltage-switched DC/DC conversion in high-efficiency, high-reliability infrastructure power systems-designed specifically for telecom, server, and industrial applications demanding wide temperature operation and adaptive soft-switching.
FAQ
What is the maximum operating junction temperature for the LTC3722HGN-1#TRPBF?
The LTC3722HGN-1#TRPBF is guaranteed over a junction temperature range of –40°C to 150°C, with thermal shutdown protection activated above TJ = 165°C. This rating enables deployment in high-ambient environments such as enclosed server racks or industrial enclosures without forced air cooling. The device's 100°C/W θJA requires careful PCB copper pour design to maintain safe operation at full load. All electrical specifications in the datasheet are validated across this full range.
How does the LTC3722HGN-1#TRPBF implement adaptive zero-voltage switching?
The LTC3722HGN-1#TRPBF implements adaptive ZVS using three dedicated pins: SBUS senses input bus voltage via a resistor divider, while ADLY and PDLY monitor active and passive leg node voltages. Internal circuitry compares these signals to generate dynamic turn-on delays-eliminating external trim components and ensuring ZVS across 10–100% load. The DirectSense™ architecture adapts in real time, unlike fixed-delay alternatives that require worst-case margining.
Can the LTC3722HGN-1#TRPBF be used with both current mode and voltage mode control?
No-the LTC3722HGN-1#TRPBF is the -1 variant and implements peak current mode control exclusively, featuring programmable slope compensation and leading edge blanking on the CS pin. The -2 variant (e.g., LTC3722HGN-2#TRPBF) uses voltage mode control with RAMP input. Pin compatibility exists between -1 and -2 versions, but control architecture, pin functions (e.g., RAMP vs. CS), and compensation networks are not interchangeable.
What is the purpose of the SPRG pin on the LTC3722HGN-1#TRPBF?
The SPRG pin on the LTC3722HGN-1#TRPBF sets the turn-off delay for synchronous rectifier drivers OUTE and OUTF via an external resistor to GND. This adjusts the timing of secondary-side FET turn-off to minimize reverse conduction loss-critical for maximizing efficiency in high-frequency, high-current DC/DC converters. Typical values range from 10kΩ to 100kΩ, yielding delays from ~100ns to ~300ns.
Does the LTC3722HGN-1#TRPBF include built-in protection features?
Yes-the LTC3722HGN-1#TRPBF integrates cycle-by-cycle current limiting (330mV CS threshold), hiccup-mode short-circuit protection, soft-start with SS capacitor ramp, UVLO with programmable hysteresis, and thermal shutdown. Fault conditions discharge the SS capacitor to initiate restart, and the FLT pin threshold (3.5V) enables external latching or microcontroller monitoring. These protections operate independently of external components, reducing system-level BOM count.
LTC3722HGN-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Full-Bridge
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 10.25V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- 98.5%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Ramp, Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
LTC3722HGN-1#TRPBF FAQ
1.How can I place an order for LTC3722HGN-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3722HGN-1#TRPBF 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 LTC3722HGN-1#TRPBF reliable?
The price and inventory of LTC3722HGN-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3722HGN-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3722HGN-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3722HGN-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3722HGN-1#TRPBF?
LTC3722HGN-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3722HGN-1#TRPBF 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 LTC3722HGN-1#TRPBF?
For technical support, including LTC3722HGN-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3722HGN-1#TRPBF requirements.
6.How does Aetrix verify that LTC3722HGN-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3722HGN-1#TRPBF 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 LTC3722HGN-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3722HGN-1#TRPBF?
All LTC3722HGN-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3722HGN-1#TRPBF, 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 LTC3722HGN-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3722HGN-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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