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

Diodes Incorporated AP9211S-AK-HAC-7

Name: AP9211S-AK-HAC-7
Brand: Diodes Incorporated
SKU: AP9211S-AK-HAC-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP9211S-AK-HAC-7

Manufacturer:: Diodes Incorporated

Category:: Battery Management

Package:: 6-UDFN Exposed Pad

Datasheet:: AP9211S-AK-HAC-7.pdf

Description:: IC BATT PROT LI-ION 1CELL 6UDFN

Quantity:: RFQ Add To RFQ list

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Inventory:1,536

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Product details

Overview

AP9211S-AK-HAC-7 from Diodes Incorporated is a single-chip Li+ battery protection IC integrating dual N-channel MOSFETs (common-drain configuration) in a U-DFN2030-6 (Type C) package. It delivers overcharge detection at 4.375 V ±25 mV, overdischarge detection at 2.500 V ±35 mV, and discharge overcurrent detection at 0.150 V ±15 mV, enabling full-cell protection for 1-cell lithium-ion battery packs in portable power tools and medical handheld devices.

For engineers reviewing the AP9211S-AK-HAC-7 datasheet, AP9211S-AK-HAC-7 pinout, AP9211S-AK-HAC-7 application, or AP9211S-AK-HAC-7 equivalent, key selection criteria include its fixed 8.0 V overvoltage charger detection threshold, selectable power-down mode, 0V battery charge permission, and integrated MOSFET R_SS(ON) of 27 mΩ (typ) at V_DD = 4.0 V.

Technical Context

The AP9211S-AK-HAC-7 implements independent voltage monitoring paths for VDD–VSS (cell voltage), VM–VSS (current-sense differential), and VDD–VM (charger overvoltage). Its logic circuit uses internal delay timers-t_CU = 1.0 s (typ), t_DL = 128 ms (typ), t_DOC = 16 ms (typ)-with ±20% accuracy at +25°C to prevent false triggering during transient events.

It supports two operational modes: power-down (0.1 µA max standby current) requiring charger-initiated wake-up, and auto-wake-up (3.5–5.5 µA active current) enabling recovery from overdischarge without external stimulus. The device uses internal pull-up (RVMD) and pull-down (RVMS) resistors-300 kΩ (typ) and 30 kΩ (typ), respectively-to manage VM pin biasing during fault states.

Key Specifications

Parameter	Value and Actual Design Meaning
Overcharge Detection Voltage	4.375 V ±25 mV - triggers charging MOSFET shutdown when cell voltage exceeds safe upper limit
Overdischarge Detection Voltage	2.500 V ±35 mV - disables discharging MOSFET to prevent deep discharge damage
Discharge Overcurrent Threshold	0.150 V ±15 mV - detects excessive load current via sense resistor voltage drop
Short-Circuit Detection Voltage	0.700 V ±100 mV - initiates immediate discharge FET cutoff for hard shorts
Charge Overcurrent Threshold	−0.150 V ±15 mV - monitors reverse voltage across sense resistor during charging
Quiescent Current (Normal Mode)	3.0 µA (typ), 4.5 µA (max) at V_DD = 3.5 V - enables multi-year battery shelf life
MOSFET R_SS(ON)	27 mΩ (typ) at V_DD = 4.0 V, I_D = 1.0 A - limits conduction loss and thermal rise under 9 A continuous load

Pinout & Package

AP9211S-AK-HAC-7 is housed in a 2.0 mm × 3.0 mm × 0.55 mm U-DFN2030-6 (Type C) package with exposed thermal pad (EP) for enhanced heat dissipation. The package supports reflow soldering per JEDEC J-STD-020 and features halogen- and antimony-free "Green" construction.

Pin/Terminal	Circuit Role	Design Meaning
1 (S1)	Source of discharge MOSFET	Connected directly to battery negative terminal; carries full discharge current path
2 (VSS)	Negative power supply reference	System ground return for all internal circuits and voltage comparators
3 (VDD)	Positive power supply input	Connected to battery positive through current-limiting resistor R1 (330–470 Ω)
4 (NC)	No connect	Floating; must not be bonded or routed on PCB
5 (VM)	Current-sense and charger monitor input	Monitors voltage drop across R2 to detect charge/discharge current and charger overvoltage
6 (S2)	Source of charge MOSFET	Connected to charger negative input; enables bidirectional current control
EP	Common drain / thermal pad	Internally tied to drains of both MOSFETs; requires large copper pour for thermal management

Key Features

Feature	Design Value
Integrated dual N-MOSFETs	Eliminates need for external discrete FETs and gate drivers, reducing BOM count and layout area by >40%
Built-in fixed delay timers	Prevents nuisance tripping during voltage transients-no external RC timing components required
Selectable 0V battery charge	Enables recovery of deeply discharged cells without manual pre-charge circuitry
Charger overvoltage protection	8.0 V fixed detection threshold protects battery from faulty or mismatched chargers
Power-down mode	Reduces quiescent current to ≤0.1 µA, extending shelf life in long-storage applications

Applications

Power Tools

Medical Handheld Devices

Use Scenario: Cordless drill/driver with 1-cell Li+ pack subject to high-current bursts and mechanical shock-induced shorts.

IC Role / Device Role / Timing Role: Primary protection controller enforcing overcurrent cutoff within 16 ms and short-circuit shutdown in <1.2 µs.

Use Value: Prevents thermal runaway during motor stall while maintaining <3 µA self-discharge during storage.

Use Scenario: Portable ultrasound or glucose meter requiring guaranteed battery safety across global temperature ranges (−40°C to +85°C).

IC Role / Device Role / Timing Role: Dual-threshold voltage supervisor with ±35 mV overdischarge accuracy and −0.15 V charge overcurrent sensing.

Use Value: Ensures compliance with IEC 62133 for medical battery systems without external calibration.

Wearable Fitness Trackers

Bluetooth Headsets

Use Scenario: Compact wearable with space-constrained 1-cell Li+ pack and frequent partial-charge cycles.

IC Role / Device Role / Timing Role: Low-quiescent protector enabling 0V charge recovery and auto-wake-up from overdischarge.

Use Value: Extends usable battery life by permitting full recharge after deep self-discharge during inactive periods.

Use Scenario: True wireless stereo earbuds with ultra-low-power operation and rapid charge cycles.

IC Role / Device Role / Timing Role: Integrated MOSFET switch delivering 27 mΩ R_SS(ON) to minimize voltage drop during 500 mA peak charging.

Use Value: Reduces charging time by 8% vs. discrete solutions due to lower conduction loss and faster wake-up response.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Seiko Instruments S-8261AAB-M6T1U	Separate protection IC + external MOSFETs; no integrated FETs; 2.0 µA typical I_Q; 4.25 V OCV threshold	Requires additional board area and layout complexity for dual-FET routing and gate drive	Preferred where field-replaceable FETs or higher current rating (>12 A) is needed
Ricoh RP502K001B-TR	Single-chip solution with integrated FETs; 4.20 V OCV; 0.125 V DOC threshold; 3.5 µA I_Q; no charger overvoltage detection	Lacks 8.0 V V_OVCHG protection, requiring external Zener clamp for charger fault tolerance	Selected when cost sensitivity outweighs need for autonomous charger overvoltage response

Compared with S-8261AAB-M6T1U and RP502K001B-TR, the AP9211S-AK-HAC-7 uniquely combines integrated 27 mΩ MOSFETs, fixed 8.0 V charger overvoltage detection, and factory-configurable 0V charge permission-enabling compact, self-contained protection without external clamps or discrete FETs.

Availability

AP9211S-AK-HAC-7 is available at Aetrix Electronics and suitable for power tools, medical handheld devices, wearable fitness trackers, and Bluetooth headsets requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for AP9211S-AK-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and protection applications.

The AP9211 belongs to Diodes' Battery Protection IC product line, engineered specifically for space-constrained, high-reliability 1-cell Li+ applications where integration, low quiescent current, and autonomous fault response are critical.

FAQ

What is the function of the NC pin (Pin 4) on AP9211S-AK-HAC-7?

Pin 4 is a no-connect terminal with no internal bonding or electrical connection. It must remain unconnected on the PCB-neither routed nor soldered-to avoid unintended coupling or ESD susceptibility. This design choice simplifies layout and eliminates risk of misrouting in high-density battery management modules.

Does AP9211S-AK-HAC-7 support automatic recovery from overdischarge without a charger?

No-the AP9211S variant includes power-down mode only and requires charger connection to exit overdischarge state. Recovery occurs when VM pin voltage rises above V_CL (4.175 V) during charging. For auto-wake-up capability, the AP9211SA variant must be selected instead.

How does the AP9211S-AK-HAC-7 handle charger overvoltage events?

It monitors V_DD–V_VM voltage continuously. At 8.0 V (±2 V), it immediately disables the charge MOSFET without delay; release occurs at 7.3 V (±2 V). This fixed-threshold, zero-delay response prevents overvoltage stress on the Li+ cell during charger faults or incorrect adapter use.

What is the maximum continuous discharge current supported by AP9211S-AK-HAC-7?

Based on its R_SS(ON) = 27 mΩ (typ) and P_D = 1000 mW rating, the device supports up to 9.0 A continuous drain current at +25°C ambient. Derating to 7.1 A applies at +70°C ambient, per the Absolute Maximum Ratings table in DS37596 Rev. 6-3.

AP9211S-AK-HAC-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 6-UDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Battery Protection

Battery Chemistry:: Lithium Ion

Number of Cells:: 1

Fault Protection:: Over Current, Over Voltage

Interface:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

AP9211S-AK-HAC-7 FAQ

1.How can I place an order for AP9211S-AK-HAC-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP9211S-AK-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 AP9211S-AK-HAC-7 reliable?

The price and inventory of AP9211S-AK-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 AP9211S-AK-HAC-7 is usually 5 days.

3.What payment methods are accepted for AP9211S-AK-HAC-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP9211S-AK-HAC-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP9211S-AK-HAC-7?

AP9211S-AK-HAC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP9211S-AK-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 AP9211S-AK-HAC-7?

For technical support, including AP9211S-AK-HAC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP9211S-AK-HAC-7 requirements.

6.How does Aetrix verify that AP9211S-AK-HAC-7 is sourced from the original manufacturer or authorized distributors?

All AP9211S-AK-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 AP9211S-AK-HAC-7 meets industry standards.

7.What is the process for return or replacement of AP9211S-AK-HAC-7?

All AP9211S-AK-HAC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP9211S-AK-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 AP9211S-AK-HAC-7 part is unused and in its original packaging.

Return procedure for AP9211S-AK-HAC-7:

1.Submit a request within 90 days.

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

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