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Diodes Incorporated AP3772BK6TR-G1-2
- Part No.:
- AP3772BK6TR-G1-2
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- SOT-23-6
- Datasheet:
-
AP3772BK6TR-G1-2.pdf
- Description:
- IC OFFLINE SW FLYBACK SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,469
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Product details
Overview
AP3772BK6TR-G1-2 from BCD Semiconductor is a primary-side regulation (PSR) AC/DC controller IC for offline flyback converters, delivering optocoupler-free constant voltage (CV) and constant current (CC) regulation in battery chargers and adapters. It uses PFM control in DCM mode, achieves ≤30mW no-load input power, features 3% cable compensation, and drives external bipolar junction transistors (BJTs). It is deployed in 5V/1A mobile phone chargers with AP4340 for dynamic response enhancement.
For engineers reviewing the AP3772BK6TR-G1-2 datasheet, AP3772BK6TR-G1-2 pinout, AP3772BK6TR-G1-2 application, or AP3772BK6TR-G1-2 equivalent, key selection criteria include PSR-based CV/CC accuracy without secondary feedback, SOT-23-6 footprint constraints, BJT gate drive capability (30mA source), line/cable compensation adjustability, and compliance with <30mW standby power requirements.
Technical Context
The AP3772BK6TR-G1-2 implements proprietary Pulse Frequency Modulation (PFM) to regulate output in discontinuous conduction mode (DCM) flyback topologies without optocouplers or secondary-side controllers. Its internal CV/CC loop relies on FB pin voltage sampling and CS pin current sensing with leading-edge blanking (500ns typ) and line compensation current (6µA at VFB = −5V).
Cable compensation is fixed at 3% of rated output voltage via CPC pin capacitor coupling, while dynamic response is enhanced when paired with AP4340. Protection includes over-voltage (7–9V FB threshold), short-circuit, open-circuit, and UVLO (13–18V startup, 3–6.5V min operating).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| No-load Input Power | ≤30mW - meets Energy Star Level VI and EU CoC Tier 2 standby efficiency requirements. |
| CV Regulation Threshold | 4.04V (typ) at FB pin - sets nominal output voltage with ±0.06V tolerance across temperature. |
| CC Sense Voltage | 525mV (typ) at CS pin - determines primary peak current for accurate constant-current output. |
| Cable Compensation | 3% of VOUT - compensates for voltage drop across USB cables up to ~1.5m length (AWG28). |
| BJT Drive Source Current | 30mA (typ) at OUT pin - directly drives base of external NPN BJT without external buffer. |
| Startup Voltage | 15.5V (typ) - ensures reliable turn-on after bulk capacitor charges above brown-out threshold. |
| Operating Temperature | −40°C to +85°C - supports industrial-grade charger operation in ambient environments. |
Pinout & Package
AP3772BK6TR-G1-2 is housed in a RoHS-compliant, green SOT-23-6 package (2.82 × 2.95 × 1.45 mm), optimized for compact adapter PCB layouts with thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | BJT base driver output | Sources up to 30mA to turn on external NPN transistor; sinks fast reverse current during turn-off (5Ω path to GND). |
| 2 (GND) | Power and signal reference ground | Return path for OUT sink current and internal bias; requires low-inductance PCB connection to minimize switching noise. |
| 3 (VCC) | IC supply input | Powered by auxiliary winding; requires local low-ESR capacitor (≥1µF) placed adjacent to pin for stable bias under load transients. |
| 4 (CS) | Primary current sense input | Detects MOSFET/BJT current via sense resistor; enables line-compensated CC with 6µA current injection at negative FB. |
| 5 (CPC) | Cable compensation & audio suppression node | Connects ≥10nF capacitor to set 3% cable drop compensation and dampen audible transformer noise. |
| 6 (FB) | Feedback voltage input | Samples reflected output voltage; triggers CV regulation at 4.04V and OVP at 8V (typ); RFB = 1.6MΩ (typ). |
Key Features
| Feature | Design Value |
|---|---|
| Optocoupler-free PSR topology | Eliminates secondary-side feedback components, reducing BOM count and layout complexity in isolated flyback designs. |
| Adjustable line compensation | 6µA current injected into CS pin proportional to line voltage ensures tight CC regulation across universal AC input (85–265VAC). |
| Integrated cable compensation | Fixed 3% output voltage boost (via CPC pin) offsets resistive drop in USB charging cables without firmware or external circuitry. |
| Enhanced audio noise suppression | CPC pin capacitor damps transformer mechanical vibration at light loads, preventing audible coil whine in portable adapters. |
| Comprehensive protection suite | Includes UVLO, OVP (7–9V), SCP, OCP, and open-circuit shutdown - enables robust unattended operation in consumer chargers. |
Applications
| Smartphone Wall Adapter | USB-C PD Auxiliary Supply |
|---|---|
|
Use Scenario: 5V/1A wall adapter for legacy smartphone charging with fixed-output USB-A port. IC Role / Device Role / Timing Role: Primary-side controller executing PFM-based DCM flyback regulation, replacing TL431 + optocoupler feedback loop. Use Value: Achieves ≤30mW no-load consumption and ±5% CV/CC accuracy without secondary sensing, reducing bill-of-materials by 4 components. |
Use Scenario: Standby power supply for USB-C PD controller ICs requiring always-on 3.3V/50mA rail. IC Role / Device Role / Timing Role: Low-quiescent PSR controller managing auxiliary flyback converter with fast transient response via AP4340 co-optimization. Use Value: Maintains tight regulation during burst-mode transitions and meets IEC 62368-1 touch-current safety limits via inherent isolation. |
| LED Night Light Driver | IoT Sensor Hub Auxiliary PSU |
|
Use Scenario: Isolated 12V/100mA constant-current driver powering white LED strings in battery-free night lights. IC Role / Device Role / Timing Role: CV/CC dual-loop regulator using FB for voltage clamp and CS for LED current limit, with built-in OCP for open-LED fault handling. Use Value: Enables flicker-free dimming down to 1% brightness via analog current scaling, leveraging precise 525mV CS threshold. |
Use Scenario: Compact 3.3V/200mA auxiliary supply for battery-powered IoT sensor nodes with BLE/Wi-Fi MCU and environmental sensors. IC Role / Device Role / Timing Role: High-efficiency PSR controller supporting wide-input (85–265VAC) mains input while maintaining <30mW standby for multi-year battery life. Use Value: Reduces system standby power by 65% versus traditional PWM controllers, extending shelf life of sealed sensor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side regulation controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3772AK6TR-G1 | 6% cable compensation vs. 3% in AP3772BK6TR-G1; identical pinout, timing, and protection features. | Targeted at longer USB cables (>2m) or higher-gauge wiring where greater voltage drop occurs. | Select when output load is connected via extended cabling requiring >3% compensation margin. |
| AP3772CK6TR-G1 | No cable compensation (0%) and same FB/CS thresholds; otherwise electrically identical. | Used in direct-board-mounted applications (e.g., internal AC/DC modules) with negligible interconnect resistance. | Choose for space-constrained embedded supplies where cable drop is absent and minimal component count is critical. |
Compared with AP3772AK6TR-G1 and AP3772CK6TR-G1, the AP3772BK6TR-G1 offers optimal trade-off between cable compensation headroom and design simplicity for standard-length USB charging cables (0.5–1.5m), avoiding overcompensation-induced output overshoot or undercompensation-induced voltage sag.
Availability
AP3772BK6TR-G1-2 is available at Aetrix Electronics and suitable for smartphone adapters, USB auxiliary supplies, LED lighting drivers, and IoT sensor hub power systems requiring stable component supply, RoHS compliance, and green packaging.
Supply support for AP3772BK6TR-G1-2 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 fabless analog IC designer specializing in high-performance power management solutions for consumer, industrial, and computing markets.
The AP3772 belongs to BCD's PSR controller product line, engineered specifically for cost-sensitive, space-constrained AC/DC adapters and chargers needing optocoupler-free regulation, ultra-low standby power, and integrated protection.
FAQ
What is the function of the CPC pin on AP3772BK6TR-G1-2?
The CPC pin sets cable voltage drop compensation and suppresses audible transformer noise. A ≥10nF capacitor connected here configures fixed 3% output voltage boost for USB cable loss compensation and provides frequency-domain damping to eliminate coil whine during light-load burst-mode operation.
Can AP3772BK6TR-G1-2 drive MOSFETs directly?
No - AP3772BK6TR-G1-2 is designed exclusively for bipolar junction transistor (BJT) drive, sourcing 30mA peak current at the OUT pin. Its output stage lacks the voltage swing and sink strength required for efficient MOSFET gate driving; external MOSFET drivers or gate buffers are necessary for FET-based implementations.
How does line compensation improve constant current accuracy?
Line compensation injects a 6µA current into the CS pin that scales with input voltage magnitude. This offsets the variation in primary peak current caused by AC line fluctuations, enabling consistent output current across 85–265VAC input range without secondary feedback or digital calibration.
Is AP3772BK6TR-G1-2 compatible with AP4340 for dynamic response enhancement?
Yes - AP3772BK6TR-G1-2 is explicitly co-designed with AP4340, which connects to the CPC pin. AP4340 monitors load transients and injects corrective current into CPC to accelerate FB loop response, achieving tight regulation during rapid load steps (e.g., smartphone charging initiation) while maintaining 30mW standby power.
AP3772BK6TR-G1-2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- -
- Topology:
- Flyback
- Voltage - Start Up:
- 15.5 V
- Voltage - Supply (Vcc/Vdd):
- 3.5V ~ 30V
- Duty Cycle:
- -
- Frequency - Switching:
- -
- Power (Watts):
- -
- Fault Protection:
- Open Circuit, Over Voltage, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
AP3772BK6TR-G1-2 FAQ
1.How can I place an order for AP3772BK6TR-G1-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3772BK6TR-G1-2 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 AP3772BK6TR-G1-2 reliable?
The price and inventory of AP3772BK6TR-G1-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3772BK6TR-G1-2 is usually 5 days.
3.What payment methods are accepted for AP3772BK6TR-G1-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3772BK6TR-G1-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3772BK6TR-G1-2?
AP3772BK6TR-G1-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3772BK6TR-G1-2 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 AP3772BK6TR-G1-2?
For technical support, including AP3772BK6TR-G1-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3772BK6TR-G1-2 requirements.
6.How does Aetrix verify that AP3772BK6TR-G1-2 is sourced from the original manufacturer or authorized distributors?
All AP3772BK6TR-G1-2 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 AP3772BK6TR-G1-2 meets industry standards.
7.What is the process for return or replacement of AP3772BK6TR-G1-2?
All AP3772BK6TR-G1-2 units undergo pre-shipment inspection (PSI). If there is an issue with AP3772BK6TR-G1-2, 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 AP3772BK6TR-G1-2 part is unused and in its original packaging.
Return procedure for AP3772BK6TR-G1-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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