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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Management

Diodes Incorporated AP9221SA-AS-HAC-7

Name: AP9221SA-AS-HAC-7
Brand: Diodes Incorporated
SKU: AP9221SA-AS-HAC-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP9221SA-AS-HAC-7

Manufacturer:: Diodes Incorporated

Category:: Battery Management

Package:: 6-UDFN Exposed Pad

Datasheet:: AP9221SA-AS-HAC-7.pdf

Description:: MULTICELL BATT MANAGER U-DFN2030

Quantity:: RFQ Add To RFQ list

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Inventory:2,522

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Product details

Overview

AP9221SA-AS-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (common-drain configuration), overcharge/overdischarge voltage detection (4.200 V / 2.750 V), discharge overcurrent sensing (0.055 V), and short-circuit protection (0.276 V) in a U-DFN2030-6 (Type C) package. It enables compact, low-quiescent-current protection for 1-cell portable power systems including Bluetooth headsets and wearable medical sensors.

For engineers reviewing the AP9221SA-AS-HAC-7 datasheet, AP9221SA-AS-HAC-7 pinout, AP9221SA-AS-HAC-7 application, or AP9221SA-AS-HAC-7 equivalent, key selection criteria include its auto-wake-up mode (no charger required for overdischarge recovery), 0V battery charge enablement, ±12 mV discharge overcurrent detection accuracy, and integrated 130 mΩ (V_DD = 4.5 V) MOSFET on-resistance.

Technical Context

The AP9221SA-AS-HAC-7 implements independent voltage monitoring paths for V_DD–V_VSS (cell voltage) and V_DD–V_M (charger overvoltage), with fixed delay timers (t_CU = 1000 ms typ., t_DOC = 10 ms typ.) and configurable release thresholds. Its logic circuit controls two internal MOSFETs via level-shifted gate drivers to isolate charge/discharge paths.

It features factory-configured auto-wake-up functionality, enabling automatic exit from overdischarge state when battery voltage rises above 2.950 V for ≥2 ms-without requiring external charger connection. The VM pin serves as bidirectional current-sense input, supporting both charge overcurrent (−0.113 V threshold) and discharge overcurrent (0.055 V) detection using the same resistor network.

Key Specifications

Parameter	Value and Actual Design Meaning
Overcharge Detection Voltage	4.200 V ±15 mV at +25°C - triggers cutoff before Li+ cell damage at 4.25 V
Overdischarge Detection Voltage	2.750 V ±35 mV at +25°C - prevents deep discharge below safe 2.5 V minimum
Discharge Overcurrent Threshold	0.055 V ±12 mV - sets 1.0 A trip point with 22 mΩ sense resistor
Quiescent Current (Normal Mode)	3.0 µA typ. at V_DD = 3.5 V - extends shelf life of sealed battery packs
MOSFET R_SS(ON)	130 mΩ max. at V_DD = 4.5 V - limits power loss to ≤130 mW at 1 A load
Short-Circuit Detection Voltage	0.276 V ±50 mV - detects >12.5 A fault current with 22 mΩ sense resistor
Operating Temperature Range	−40°C to +85°C - supports industrial-grade portable equipment operation

Pinout & Package

U-DFN2030-6 (Type C) package: 2.0 mm × 3.0 mm × 0.55 mm body, exposed thermal pad (EP), 0.5 mm pitch, RoHS-compliant matte tin lead finish.

Pin/Terminal	Circuit Role	Design Meaning
1 S1	Source of discharging MOSFET	Connects directly to battery negative terminal; carries full discharge current path
2 VSS	Negative power supply reference	System ground return for all internal analog comparators and logic
3 VDD	Positive supply input	Connected to battery positive via 330–470 Ω resistor; powers internal circuitry
4 NC	No connect	Must remain floating; no internal connection or function
5 VM	Current-sense and charger monitor input	Measures voltage drop across R2 to detect charge/discharge overcurrent and charger overvoltage
6 S2	Source of charging MOSFET	Connects to charger negative input; enables bidirectional current control
EP	Common drain of both MOSFETs	Thermal pad tied to PCB copper pour for heat dissipation; electrically connected to P+ node

Key Features

Feature	Design Value
Auto-wake-up mode	Enables overdischarge recovery without charger: device resumes normal operation when V_BAT ≥ 2.950 V for ≥2 ms
0V battery charge enable	Permits recharging fully depleted cells (0 V) by detecting ≥1.2 V at V_0CHA threshold
Integrated dual MOSFETs	Eliminates external FETs and gate drivers; reduces BOM count and PCB area by ≥30% vs discrete solutions
Fixed delay timers	On-chip timing eliminates external RC networks for overcharge (1000 ms), overdischarge (115 ms), and short-circuit (360 µs) detection
Charger overvoltage protection	Detects V_DD–V_M ≥ 8.0 V (±2 V) to disable charging MOSFET during faulty adapter events

Applications

Wireless Earbuds

Portable ECG Monitors

Use Scenario: Compact Li+ battery pack powering dual Bluetooth earpieces with active noise cancellation.

IC Role / Device Role / Timing Role: Primary protection controller managing charge/discharge paths, overcurrent shutdown, and 0V recharge initiation.

Use Value: Enables 24-month shelf life via 3.0 µA quiescent current and prevents thermal runaway during accidental short-circuit events.

Use Scenario: Single-use disposable cardiac sensor patch with 12-hour runtime and USB-C charging.

IC Role / Device Role / Timing Role: Safety-critical protector ensuring battery stays within 2.75–4.20 V window during clinical use and charging cycles.

Use Value: Guarantees compliance with IEC 62368-1 through ±35 mV overdischarge detection accuracy and <2 ms release delay.

Smart Fitness Trackers

Rechargeable Power Tools (Miniature)

Use Scenario: Wrist-worn activity tracker with optical heart-rate sensor and BLE radio.

IC Role / Device Role / Timing Role: Dual-function protector providing overdischarge recovery via auto-wake-up and precise 0.055 V discharge overcurrent trip.

Use Value: Eliminates need for manual reset after deep discharge, improving user experience and field reliability.

Use Scenario: Cordless screwdriver with 3.7 V Li+ cell and 2 A peak motor load.

IC Role / Device Role / Timing Role: High-current protector using 130 mΩ MOSFETs and 0.276 V short-circuit detection for sub-500 µs fault response.

Use Value: Prevents MOSFET thermal failure during stall conditions while maintaining <100 mW conduction loss at rated load.

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery protection applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
R5640T202B-TR	Fixed 4.25 V overcharge threshold; no 0V charge option; 5.0 µA quiescent current	Lacks auto-wake-up and 0V recharge - requires external charger to exit overdischarge	Select when cost sensitivity outweighs user convenience and shelf-life requirements
BD8620GUL	Separate charge/discharge FET control; 2.0 µA quiescent current; no charger overvoltage detection	Requires external MOSFETs and gate resistors; adds ≥4 passive components	Choose for designs needing independent FET drive timing or ultra-low standby current

Compared with R5640T202B-TR and BD8620GUL, the AP9221SA-AS-HAC-7 uniquely integrates auto-wake-up, 0V charge enablement, and charger overvoltage protection in a single U-DFN2030-6 package-reducing component count by up to 7 parts while maintaining ±12 mV overcurrent accuracy.

Availability

AP9221SA-AS-HAC-7 is available at Aetrix Electronics and suitable for wireless earbuds, portable ECG monitors, smart fitness trackers, and miniature rechargeable power tools requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for AP9221SA-AS-HAC-7 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, specializing in high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP9221 belongs to Diodes' Battery Protection IC product line, engineered specifically for space-constrained, single-cell Li+ applications demanding integrated MOSFETs, ultra-low quiescent current, and robust fault recovery-without external timing components.

FAQ

What is the function of the VM pin in AP9221SA-AS-HAC-7?

The VM pin serves as a bidirectional current-sense input that monitors voltage drop across an external sense resistor (R2) to detect both charge overcurrent (negative voltage) and discharge overcurrent/short-circuit (positive voltage). It also enables charger overvoltage detection between VDD and VM, triggering automatic charging MOSFET shutdown at 8.0 V.

Does AP9221SA-AS-HAC-7 support 0V battery charging, and how is it enabled?

Yes-the AP9221SA-AS-HAC-7 includes factory-configured 0V battery charge functionality. When the battery voltage is 0 V, the IC permits charging if the V_0CHA threshold (≥1.2 V) is met, allowing recovery from deep self-discharge. This feature is permanently enabled in the SA variant and cannot be disabled externally.

How does auto-wake-up mode differ from power-down mode in this device?

Auto-wake-up mode (enabled in AP9221SA-AS-HAC-7) allows automatic recovery from overdischarge when battery voltage rises above 2.950 V for ≥2 ms-without requiring charger connection. Power-down mode (not present here) forces permanent sleep until charger is attached, consuming only 0.1 µA but requiring external intervention to resume operation.

What is the maximum continuous current supported by the internal MOSFETs?

The internal dual N-channel MOSFETs support 2.8 A continuous drain current at T_A = +25°C and V_GS = 4.5 V, with R_SS(ON) ≤130 mΩ. At +70°C ambient, derated capacity is 2.2 A. Thermal performance depends on PCB copper area under the EP pad; ≥100 mm² recommended for full-rated operation.

AP9221SA-AS-HAC-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-UDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Battery Protection

Battery Chemistry:: Lithium Ion

Number of Cells:: 1

Fault Protection:: Over Current, Over Voltage, Short Circuit

Interface:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: U-DFN2030-6 (Type C)

AP9221SA-AS-HAC-7 FAQ

1.How can I place an order for AP9221SA-AS-HAC-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP9221SA-AS-HAC-7 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 AP9221SA-AS-HAC-7 reliable?

The price and inventory of AP9221SA-AS-HAC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP9221SA-AS-HAC-7 is usually 5 days.

3.What payment methods are accepted for AP9221SA-AS-HAC-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9221SA-AS-HAC-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP9221SA-AS-HAC-7?

AP9221SA-AS-HAC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP9221SA-AS-HAC-7 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 AP9221SA-AS-HAC-7?

For technical support, including AP9221SA-AS-HAC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9221SA-AS-HAC-7 requirements.

6.How does Aetrix verify that AP9221SA-AS-HAC-7 is sourced from the original manufacturer or authorized distributors?

All AP9221SA-AS-HAC-7 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 AP9221SA-AS-HAC-7 meets industry standards.

7.What is the process for return or replacement of AP9221SA-AS-HAC-7?

All AP9221SA-AS-HAC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP9221SA-AS-HAC-7, 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 AP9221SA-AS-HAC-7 part is unused and in its original packaging.

Return procedure for AP9221SA-AS-HAC-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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