My Inquiry
My Account
Renesas IW636-21
- Part No.:
- IW636-21
- Manufacturer:
- Renesas
- Category:
- Power Supply Controllers, Monitors
- Package:
- SOT-23-6
- Datasheet:
-
IW636-21.pdf
- Description:
- AC/DC SECONDARY-SIDE CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:2,828
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The IW636-21 from Renesas Electronics is an AC/DC secondary-side controller IC supporting Qualcomm Quick Charge 3.0 protocol, enabling multi-level VBUS output (3.6V–9V in 200mV steps) with D+/D− USB interface communication and built-in opto-coupler LED driver. It resides on the secondary side of fast-charging adapters for smartphones and tablets, delivering <10mW no-load power consumption at 5V/2A and integrated D+/D− over-voltage protection.
For engineers reviewing the IW636-21 datasheet, IW636-21 pinout, IW636-21 application, or IW636-21 equivalent, key selection criteria include its 3.6V–9V VBUS range, 0.422 kCC coefficient up to 9V, 11V OVP threshold for non-QC devices, SOT-23-6 package, and compatibility with Dialog iW1782 primary-side controllers for simplified opto-coupler-based feedback.
Technical Context
The IW636-21 implements Dialog's proprietary secondary-to-primary digital communication over a single opto-coupler, transmitting voltage requests, current limits, UV/OV status, and fault signals without discrete decoders. Its D+/D− pins support QC3.0 handshake and proprietary soft-short detection, while DIS and DRV pins enable active fast discharge and opto-LED drive with automatic current limiting.
It operates across 3V–16V supply range, supports backward compatibility with QC2.0 and USB BC1.2, and integrates double-layer cable protection: D+/D− OVP on secondary side and SmartDefender™ hiccup response on primary side when paired with iW1782. The device maintains <150µA cut-off current during 5V steady-state operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBUS Range | 3.6V to 9V in 200mV increments - enables precise QC3.0 voltage negotiation within reduced upper limit vs. full 12V variants. |
| kCC Coefficient | 0.422 for VBUS = 3.6V to 9V - defines constant-current slope for adaptive charging current scaling across full supported range. |
| OVP Threshold | 11V - triggers over-voltage protection when non-QC-enabled mobile devices are attached, preventing damage. |
| No-Load Power | <10mW at 5V/2A output - achieved via ultra-low quiescent current and normally-OFF state with <150µA cutoff. |
| Package | SOT-23-6 - surface-mount, thermally efficient 6-pin package compatible with high-density adapter PCB layouts. |
| ESD Rating (D+/D−) | 4,000V HBM - ensures robustness against electrostatic discharge during USB connector mating/unmating. |
| Operating Voltage (VCC) | 3V to 16V - supports wide input range for secondary-side biasing across varied transformer designs and rectifier topologies. |
Pinout & Package
Package: 6-lead SOT-23, RoHS-compliant, tape-and-reel (3,000/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DIS | Discharge control output | Drives external MOSFET or internal switch to rapidly discharge VBUS capacitor upon unplug or command, reducing residual voltage risk. |
| 2 - DRV | Opto-coupler LED driver | Provides regulated current drive (min. 2mA) to primary-side opto-LED, eliminating need for external current-setting resistor. |
| 3 - VCC | Power supply input | Accepts 3V–16V bias; powers internal circuitry and supports low-quiescent operation down to <150µA in 5V steady state. |
| 4 - D− | USB data line (bidirectional) | Participates in QC3.0 handshake and proprietary D+/D− soft-short detection; rated −0.3V to 7V absolute max. |
| 5 - GND | Ground reference | Common return path for all analog and digital functions; must be low-impedance connection to secondary-side ground plane. |
| 6 - D+ | USB data line (input-only) | Receives QC3.0 negotiation signals and enables backward compatibility with QC2.0/BC1.2; same voltage rating as D−. |
Key Features
| Feature | Design Value |
|---|---|
| QC3.0 Protocol Support | Enables dynamic 200mV-step VBUS adjustment from 3.6V to 9V, optimizing charge speed and thermal management for mid-range portable devices. |
| D+/D− Over-Voltage Protection | Proprietary secondary-side circuitry detects and mitigates VBUS-induced D+/D− soft shorts, improving cable reliability and system safety. |
| Single Opto-Coupler Interface | Transmits all control signals (voltage request, current limit, UV/OV, fault) over one opto-isolator, reducing BOM count and PCB footprint vs. multi-opto solutions. |
| Built-in Opto-LED Driver | Integrates current-regulated DRV output (≥2mA), removing external bias components and simplifying primary-side feedback design. |
| Fast Discharge Capability | DIS pin supports ≥600mA peak current to actively drain output capacitance, meeting USB PD and safety standards for rapid VBUS collapse. |
Applications
| Smartphone Rapid Charging Adapter | Tablet Fast-Charge Wall Adapter |
|---|---|
Use Scenario: Compact 15W AC/DC adapter powering QC3.0-enabled smartphones with variable VBUS (3.6V–9V) based on battery SOC and temperature. IC Role / Device Role / Timing Role: Secondary-side QC3.0 controller coordinating voltage/current negotiation with mobile device and relaying commands to primary-side iW1782 via opto-coupler. Use Value: Achieves <10mW no-load power and eliminates discrete decoders, reducing component count and improving time-to-market for OEM adapter designs. | Use Scenario: Dual-port wall charger delivering adaptive 5V/9V output to tablets requiring higher sustained current and tighter voltage regulation. IC Role / Device Role / Timing Role: USB D+/D− interface controller managing QC3.0 handshake, OVP thresholding (11V), and fast discharge on port disconnect. Use Value: Enables safe, compliant VBUS ramp-down and prevents latch-up during cable insertion/removal under load, extending adapter lifespan. |
| USB-C Compatible Legacy Adapter | QC2.0 Backward-Compatible Travel Charger |
Use Scenario: Retrofitting existing USB-A adapter platforms with QC3.0 capability while maintaining mechanical compatibility and safety certifications. IC Role / Device Role / Timing Role: Secondary-side protocol translator converting QC3.0 requests into analog feedback signals for legacy primary controllers. Use Value: Leverages existing transformer and rectifier designs, avoiding full redesign-only secondary-side board revision required. | Use Scenario: Cost-sensitive travel charger supporting both QC2.0 and QC3.0 devices without firmware update or hardware change. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for iW626, providing identical QC2.0 handshake behavior plus extended QC3.0 functionality. Use Value: Reduces qualification overhead by reusing validated layout and test procedures while adding next-gen charging support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary-side USB charging controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| iW626 | Pin-to-pin compatible; supports QC2.0 only; no QC3.0 voltage stepping or kCC coefficient programming. | Limited to fixed 5V/9V/12V outputs; lacks D+/D− OVP and fast discharge features. | Select iW626 only for cost-sensitive QC2.0-only designs where 3.6V–9V granularity and enhanced protection are unnecessary. |
| IW636-05 | Same core IC but configured for 3.6V–12V VBUS range and 14.76V OVP threshold; includes kCC tuning for higher-voltage operation. | Required for full-range QC3.0 compliance (e.g., 12V tablet charging); not suitable where 9V ceiling improves safety margin. | Choose IW636-05 when supporting devices needing >9V VBUS; IW636-21 is preferred for compact 5–9V smartphone adapters with tighter OVP. |
Compared with iW626 and IW636-05, the IW636-21 offers optimized trade-offs for mid-power smartphone adapters: reduced VBUS ceiling (9V) lowers stress on secondary-side capacitors and magnetics, 11V OVP improves safety margin for non-QC loads, and fixed 0.422 kCC simplifies current-limit calibration across its entire operating range.
Availability
IW636-21 is available at Aetrix Electronics and suitable for smartphone rapid-charging adapters, tablet fast-charge wall adapters, and QC2.0 backward-compatible travel chargers requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for IW636-21 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
Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded design innovation, with expertise in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and consumer markets.
The IW636-21 belongs to Renesas' acquired Dialog Semiconductor USB power delivery and rapid-charging controller product line, engineered specifically for high-efficiency, low-no-load AC/DC adapters targeting mobile device ecosystems.
FAQ
What is the maximum VBUS output voltage supported by the IW636-21?
The IW636-21 supports a maximum VBUS output voltage of 9V, adjustable in 200mV increments from 3.6V to 9V. This range is defined in the ordering information table and distinguishes it from broader-range variants like IW636-05 (up to 12V). The 9V ceiling reduces component stress and improves safety margins in compact smartphone adapters where higher voltages are unnecessary. IW636-21 maintains full QC3.0 protocol compliance within this constrained range.
Does the IW636-21 require an external opto-coupler LED current-limiting resistor?
No, the IW636-21 does not require an external current-limiting resistor for the opto-coupler LED. Its DRV pin integrates a built-in LED driver capable of delivering ≥2mA drive current with automatic current limiting. This feature eliminates the need for external bias components, reduces BOM count, and simplifies PCB layout. The internal driver ensures consistent signal transmission to the primary-side controller (e.g., iW1782) without resistor tolerance or thermal drift concerns-key for reliable secondary-to-primary communication in the IW636-21.
How does the IW636-21 handle over-voltage protection for non-QC-enabled devices?
The IW636-21 provides a fixed 11V over-voltage protection (OVP) threshold when a non-QC-enabled mobile device is attached. This OVP level is factory-configured per the ordering option and differs from variants like IW636-05 (14.76V). It triggers shutdown if VBUS exceeds 11V, protecting legacy USB devices from excessive voltage. The protection operates independently of QC handshake and is part of the device's double-layer cable safety architecture-complementing D+/D− OVP on the secondary side and SmartDefender™ on the primary side. This behavior is guaranteed for the IW636-21.
Is the IW636-21 pin-compatible with other members of the iW636 family?
Yes, the IW636-21 is pin-compatible with all iW636 variants, including IW636-05 and IW636-00, sharing the same SOT-23-6 footprint and pinout (DIS, DRV, VCC, D−, GND, D+). This allows direct PCB reuse across different VBUS range and OVP configurations. However, functional differences-including VBUS ceiling (9V vs. 12V), kCC coefficient (0.422 vs. 0.5), and OVP threshold (11V vs. 14.76V)-require firmware or external component adjustments. The IW636-21 maintains full mechanical and electrical compatibility while delivering distinct parametric optimization.
What is the no-load power consumption specification for the IW636-21?
The IW636-21 achieves <10mW no-load power consumption at 5V/2A output setting, enabled by ultra-low quiescent current and a normally-OFF state with <150µA cutoff current during 5V steady-state operation. This performance is verified in typical 15W rapid-charge adapter designs using iW1782 as the primary-side controller. The specification reflects system-level efficiency-not just IC-level draw-and is critical for meeting global energy regulations such as DOE Level VI and EU CoC Tier 2. IW636-21 delivers this performance without external assist circuits.
IW636-21 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Applications:
- Secondary-Side Controller, Synchronous Rectifier
- Voltage - Input:
- -0.3V ~ 7V
- Voltage - Supply:
- 30V
- Current - Supply:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
IW636-21 FAQ
1.How can I place an order for IW636-21 through Aetrix?
Please submit a Request for Quotation (RFQ) for IW636-21 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 IW636-21 reliable?
The price and inventory of IW636-21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IW636-21 is usually 5 days.
3.What payment methods are accepted for IW636-21?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IW636-21 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IW636-21?
IW636-21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IW636-21 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 IW636-21?
For technical support, including IW636-21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IW636-21 requirements.
6.How does Aetrix verify that IW636-21 is sourced from the original manufacturer or authorized distributors?
All IW636-21 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 IW636-21 meets industry standards.
7.What is the process for return or replacement of IW636-21?
All IW636-21 units undergo pre-shipment inspection (PSI). If there is an issue with IW636-21, 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 IW636-21 part is unused and in its original packaging.
Return procedure for IW636-21:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IW636-21 Tags
-
UC3845AD8TR
Texas Instruments
-
UC2843AD8TR
Texas Instruments
-
LM3880MFX-1AE/NOPB
Texas Instruments
-
LM3880MFX-1AA/NOPB
Texas Instruments
-
INA234AIYBJR
Texas Instruments
-
INA700AYWFR
Texas Instruments
-
LM3880MF-1AE/NOPB
Texas Instruments
-
LM3880MF-1AA/NOPB
Texas Instruments
-
LM3881MM/NOPB
Texas Instruments
-
UCC2802DTR
Texas Instruments
-
NCP4305DMTTWG
onsemi
-
INA237AIDGSR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
